MKIV Supra Single Turbo Conversion

[HellBringer]

I'm in the process of installing an old school RPS (yes, the clutch people) single turbo kit with an ITS 72mm DBB turbo & recirculated ITS wastegate. This same setup went 9.8 @ 153MPH with a 70 shot 8-9 years ago. 'Lag' should be very tolerable -- not much worse than the stockers in true-twin mode.


http://i282.photobucket.com/albums/kk252/AHPowelson/RPS/HPIM1822.jpg


Stock twin removal was not difficult -- almost pleasant, actually... LOL

After a cumulative 5hrs the engine bay looks like this:

http://i282.photobucket.com/albums/kk252/AHPowelson/turbo_s.jpg


The manifold and turbo are just mocked up for fitment testing at this point. Everything is coming back out so I can give the engine a thorough detail. I've got a few small parts on order and I still need to install the TRD poly engine mounts. Due to work and upcoming travel it will probably be the weekend after next before it's completed.

Mods upon completion will be:

RPS T72 turbo kit
GReddy 3-Row FMIC
HKS Carbon Ti catback
Spec Twin-Disk clutch
TRD poly engine and tranny mounts
Blitz DSBC boost controller
HKS VPC w/ SAFCII
G-Force ECU w/ fuel, timing and 8k rev mods
2x HKS SSQ BOV
Trac-delete
EGR-delete
R1 Slotted Rotors
Hawk HPS pads

The only limiting factor at this point will be the fuel system. I'll be stuck at ~ 525RWHP until I pick a direction for fuel.

I'll update this thread as things progress. :cool:

[Disrupter]

That thing is gonna be a beast!

[mb7050]

damn that is a short list of performance mods for 500whp.

[PsykoGamer]

dear god...that gives me goosebumps just by looking at that lol. Looks sexy.

[HellBringer]

damn that is a short list of performance mods for 500whp.


It dyno'd 444RWHP with the stock turbos. 525RWHP is the absolute max for the completely stock fuel system. The 72mm turbo is capable of an honest 800-850HP. With just a fuel system upgrade the car should easily be in the upper 600RWHP range. Cams and a few other minor odds and ends will put it near the 700RWHP range.

[Monster Stealth]

Interesting, subscribed for updates.

[mb7050]

It always amazes me how much stock 2jgte engine internals can handle and be realiable its just unreal. But I´m still hard core rb fan ...

[HellBringer]

All the stock shit...

http://i282.photobucket.com/albums/kk252/AHPowelson/Parts%20for%20Sale/HPIM2091.jpg

[DocWalt]

BPU Supras are beastly, I wish 3s's could BPU that well... Good luck on the build :)

[onebadmollafolla]

Well done, hellbringer. Should be a complete beast! So do you have any set goals as far as track times go? You going to go for 9's as well? Also, was the car that went 9.8 on that setup an auto or the 6 speed?

[SLAPS35]

Nice job, Abram.

Wish I was there to help out.

[green-lantern]

Very cool, looks like it will be a blast.

[onebadmollafolla]

Dang, Greetn-Lantern has already sold something on 3sgto.org? Son' bitch could sell a painting to a blind man!


/hijack

[HellBringer]

Well done, hellbringer. Should be a complete beast! So do you have any set goals as far as track times go? You going to go for 9's as well? Also, was the car that went 9.8 on that setup an auto or the 6 speed?


No real specific ET or MPH goals other than I'd like to be firmly in the 10's. If the stars aligned, I could possibly click off a 10 with the stock fuel system (been done many times), but I don't know if I will track the car before fuel upgrades. Good weather is just around the corner, so who knows..! The T72 is a relatively old school design and I'm using a fairly small AR (.70) for spool. 9's won't be readily doable without cams and a few other things; it's just not realistic on this turbo unless everything is still to 'KILL'. Something in one of the new Billet flavors will really wake the car up, but I'll be content (in the mean time) with 600-700RWHP and good spool.


The 9.8 car was a 6sp on a VPC (old school, before AEM, etc..) with no antilag/launch control, etc... This was 2001ish:



http://www.youtube.com/watch?v=slnpo9y-wtk


I've lusted after the RPS sound for almost 10 years now:



http://www.youtube.com/watch?v=-6y_xixS5b4


The videos don't do the sound justice; it really must be experienced in person.

[TajMan]

Great set of cars you got there, and the upgrades to the Supra are awesome and perfect.
the one who brings hell..

[DocWalt]

Ti exhausts make almost anything sound better :)

[HellBringer]

The exhaust has almost nothing to do with the sound; it's the RPS manifold.

[DocWalt]

I'm sure it is, it's not a very common design. All the local Supra guys run either fully custom, or some JDM tyte stuff... Is it fully equal length? It looks like a really well designed manifold.

[HellBringer]

It's about as close to equal length as you can get, but it's not really a true "equal length". All of the design characteristics contribute the unique sound, and it's one of the very few recirculated wastegate setups out of the box -- a BIG plus for me. Back in the day, this was a 6-7k kit...! The one flaw in the design is the wastegate port setup -- it's almost 90* off the collector, which does not promote good flow. As a result, they tend to boost creep pretty badly above7k RPM if you go to a large AR exhaust housing and/or 4" downpipe. Great for making power, but not great if you want to tool around on pump gas and low boost. I'm sticking with the original 3" recirculated setup, so I won't have that issue. Sound Performance is currently in the process of reproducing this manifold with a modified wastegate port setup. They actually used my manifold to design their jig, and that killer coating job was complimentary for the downtime.

[DocWalt]

Good, you're not gonna be an open dump ricer. 6-7k was pretty significant, even for the Supra market. Are you sticking with the "stock" exhaust housing? Do you think you'll switch to the new design, or are you not going to push it enough to worry about the possible wastegate issues? From the sounds of it, you're going to push the limits of this setup. :p

[HellBringer]

I may eventually get to a larger AR turbine housing, but I will be sticking with the 3" recirculated downpipe setup for sure.


Here's a good shot of the wastegate and downpipe setup:




http://mkiv.com/techarticles/rps_turbo_kit/pics/p2010107.jpg




The whole setup:



http://mkiv.com/techarticles/rps_turbo_kit/pics/SBH%20car%20and%20RPS%20kit%20alongside.jpg

[DocWalt]

I'm not well schooled in flow yet, but I would have thought the wastegate would have been smoothed into the downpipe better. There's enough room in the engine bay, I'd think. Either way, it's still badass, and probably easily flows enough for most power levels.

[HellBringer]

The wastegate dump back into the downpipe actually creates a nice venturi effect, and effectively corrects for the inefficient wastegate port placement/location. That's one of reasons boost creep becomes an issue when you go to a larger downpipe with an open wastegate dump -- you lose that venturi the system was designed to produce. The placement of the wastegate port relative to the flow is the real deficiency.

[DocWalt]

Ok, I can see that. Yeah, the 90* isn't good for flow... Do you have any idea of what the flow rates are through the wastegate at various boost levels versus the flow through the turbine?

[HellBringer]

Absolutely no idea. :p

[DocWalt]

I only ask because on some setups it can reach 75% through the wastegate, lol. This doesn't look like one of those setups ;)

[FastOldGuy]

Its going to be a beast. I raced at 72mm Supra 6speed in fort Worth with my Whippled Shelby. I beat him but he did very good I bet he was on a street tune n 93 octane. I was running Torko and 18psi. We only went to 120 he might have caught me if we went faster. Supra can be beastly.

[HellBringer]

Here are few pics from today after cleaning up the engine bay a little -- still have a lot of polishing today. Everything is still mocked up at this point for fitment purposes (working on the water lines for the turbo). I have a shopping list of about a dozen misc. things I still need to order to get it finished up. I'm leaving on business Wednesday morning and won't be back until late Sunday, so I'm waiting a little later in the week to place the order. My plan is to have the car up and running weekend after next.


http://i282.photobucket.com/albums/kk252/AHPowelson/RPS/HPIM2099.jpg



http://i282.photobucket.com/albums/kk252/AHPowelson/RPS/HPIM2094.jpg



http://i282.photobucket.com/albums/kk252/AHPowelson/RPS/HPIM2121.jpg



http://i282.photobucket.com/albums/kk252/AHPowelson/RPS/HPIM2124.jpg

[FastOldGuy]

Looks very nice! It will be a great highway monster.

[Emilie@GZP]

that's so cute and wittle!! AWWWWW!!!!!!

[VR4]

Hope you brace that manifold. Heard a lot of things about the rps manifolds cracking.

[HellBringer]

Em -- That's not the first time I've heard that... :-/


ppi -- Not braced; doesn't need it. Some of these manifolds have been around for 10+ years now -- high mileage units may develop cracks, but they certainly aren't prone to it. I know of one that's been on 4 different cars and probably has 100k cumulative miles and it's still good as new, structurally. I had a GReddy T88 manifold that was cracked halfway around the T4 flange. Not something that they are known for, but it happens.

[Emilie@GZP]

haha it looks good though :) Nice job.

[lawdogg]

Lookin good Abram.

Now put one in the Vette.

[colt45 gto]

looks good. in for updates.

[HellBringer]

http://i282.photobucket.com/albums/kk252/AHPowelson/RPS/HPIM2248r.jpg


It's alive! Still on stock fuel, so I'm limited to 16-17psi until the fuel system goes in. No signs of leaning out yet, so I may have a little bit left to go. A/F is in the upper 10's/lower 11's at WOT without any correction. It's absofuckinglutely ridiculously fun to drive as-is. The power delivery is insane; spool is even better than I was expecting. I may dyno it just so I can find the true limit of the fuel system -- should be 525RWHP or so. I've seen 10's in the 130MPH range on completely stock fuel; I may give that a shot. ;)


:love: all over again..!


Complete mod list:

RPS turbo kit w/ ITS T72 dbb turbo .70 ar; ITS Progate wastegate
HKS Carbon Ti catback
HKS SSQ BOV
GReddy 3-Row FMIC
G-Force ECU (increase rev-limiter; modified fuel & timing maps)
HKS VPC/SAFCII
Blitz DSBC
Spec Super Twin Disk clutch
TRD engine & tranny mounts
TRAC & EGR delete
NGK AFX wideband w/ NTK sensor
GReddy 52mm boost gauge

[DocWalt]

Nice, now get some track times before the season ends :p

[akotten]

Those seem like the perfect mods. I would DD that beast day in day out as it is on stock fuel.

[terrets]

Sweeeet! Lets see some times and vids :D. I want a Supraaa

[mb7050]

Nice ! Such a clean build too :Clap:

[green-lantern]

Nice!.....

[HellBringer]

It was an absolutely gorgeous fall day today so we decided to take the top off and do a good shakedown drive. Put about 80 miles on the car and the only issue I had was blowing the vacuum lines of my boost controller solenoid twice. A few extra zip ties should take care of that. I think I may end up wrapping the downpipe as it runs very close to one of the coolants lines. I have the line wrapped and shielded, but I think wrapping the DP will be a permanent solution.


Here's a pretty worthless video shot from my still camera. The top was off so the wind noise pretty much drowns everything out. The one attempt at a driveby video was a failure LOL... I blew the line off my wastegate solenoid on the 1-2 shift which resulted in 8psi and all you can really hear is the wind...



http://www.youtube.com/watch?v=ZEh_uAUbHTs



I'll get some better video when I've got something of quality worth sharing.

[92EuroDiamante]

Beautiful! You've gotta love those stock supra pumps :)

[Tsi_shinobi]

Sheesh, I have a friend who has a supra that looks just like yours... He needs to take some lessons from you... He's somewhere in the mid 400 range... AemV1... Gt4202... 1000cc injectors...Greddy 4row FMIC..twin walbros... Etc... Gotta find a better tuner :) your car is sick

[HellBringer]

Sheesh, I have a friend who has a supra that looks just like yours... He needs to take some lessons from you... He's somewhere in the mid 400 range... AemV1... Gt4202... 1000cc injectors...Greddy 4row FMIC..twin walbros... Etc... Gotta find a better tuner :) your car is sick



I'd say his shit is broke! That's an easy ~700RWHP setup.

[terrets]

Veryy nicee :). The car sounds good. Way to sequel the tires into second :)

[HellBringer]

Here's another crappy video just messing around:



http://www.youtube.com/watch?v=tO5xhmenH9I

[HellBringer]

Took the Supra to the track yesterday for the first time since going single. Still on the bone stock original fuel system, so I'm limited to only 17psi at the moment. Anymore boost and the A/F's start creeping into the 12's uncorrected. I could have pushed a little more, but I always err on the side of caution.


Pertinent mods:


RPS Turbo kit w/ ITS T72
HKS Carbon Ti catback
GReddy 3-row FMIC
Gforce ECU
VPC/SAFCII w/ A chip (all zero'd out - no correction)
Spec twin disk clutch
TRD engine & tranny mounts
Titan diff ear mounts (only the upper part currently)
MT Drag radials

I really went for the fun of it and wasn't expecting much in the way of ET's. As I expected the track was like an ice skating rink. 6sp + drag radials is typically a Supra cardinal sin due to the propensity to wheelhop and break driveshafts and diffs, but I have adjusted my launch technique to eliminate wheel hop at the expense of 60'. Worked pretty well for me when I was BPU -- I was cutting 1.7 60's with a gentle slip. Unfortunately the track wasn't cooperating yesterday, but I was more interested in MPH.

Each run I put a little more heat in the tires and got a little more aggressive with the launch -- no wheel hop at all. On the last my Jared (stealthlabel) hopped in the car and rode along..! No tech, no helmets and ride alongs -- gotta love the south! :bigthumb: The extra weight helped my 60' but I lost a little MPH.



http://i282.photobucket.com/albums/kk252/AHPowelson/Supra_rock_1127.jpg



Video:




http://www.youtube.com/watch?v=mpBIs6G0yto



Overall, I'm stoked at 125MPH at only 17psi! Next up is fuel mods, TRD diff, driveshaft and a real tire. The car should be a beastly at 28-30psi. :devil: Looking forward to 10's in the spring. Cams and a few other odds and ends then maybe 9's...?

[thor'svr4]

lol thats nuts.

[HellBringer]

Here's in the in-car video of the last run:



http://www.youtube.com/watch?v=AXCYajdlE2Q

[VR4]

Wow. That's out trapping my buddies 97. I think a greddy t78 and aem running more boost.


Edit. Nvm. Same trap. Still amazing considering the 7 psi less boost

[HellBringer]

Wow. That's out trapping my buddies 97. I think a greddy t78 and aem running more boost.


Edit. Nvm. Same trap. Still amazing considering the 7 psi less boost



If he's only trapping 125MPH at 24lbs then I'd say his shit is broke and/or his AEM tune is jacked (more than likely the tune). He should easily be well into the 130's and 620-650RWHP.

Is his car white?

[VR4]

If he's only trapping 125MPH at 24lbs then I'd say his shit is broke and/or his AEM tune is jacked (more than likely the tune). He should easily be well into the 130's and 620-650RWHP.

Is his car white?

Green. John Reed said he has a very conservative tune in it.

[HellBringer]

Hard to point the finger at a John Reed tune. Still... Something is off if he's only trapping 125MPH. Hell I trapped 120MPH on the stock twins in 97* heat at 19-20psi.

[HellBringer]

Figured I'd up this thread with my latest progress:

Dyno'd 2/14/11 on 3SX's purportedly "stingy" SuperFlow dyno.

Relevant power mods are:

RPS turbo kit w/ 3" recirculated downpipe
ITS Progate 42mm wastegate
ITS GT72 (72mm) watercooled Q-trim .70ar
HKS Carbon Ti (95mm version)
GReddy 3-row FMIC
RKS Powersystems fuel system w/ twin Walbros & 75lb injectors
VPC/SAFCII/Gforce ECU
HKS DLI
Blitz DSBC
Original stock longblock w/ 58k miles
Built and tuned be me.

All pulls done on VP C16



1st pull right off the highway; 21psi and extremely rich:

http://i282.photobucket.com/albums/kk252/AHPowelson/Supra%20Dyno%20021411/564RWHP_SAE.jpg


24psi:

http://i282.photobucket.com/albums/kk252/AHPowelson/Supra%20Dyno%20021411/622RWHP_SAE.jpg


28psi (boost issue at 6600RPM):

*NOTE -- I started to have some boost issues that ended up being a loose vacuum line on my EBC solenoid

http://i282.photobucket.com/albums/kk252/AHPowelson/Supra%20Dyno%20021411/672RWHP_SAE.jpg


29psi dropping to 28psi (more EBC issues):


http://i282.photobucket.com/albums/kk252/AHPowelson/Supra%20Dyno%20021411/680RWHP_SAE.jpg


Next pull I blew the vacuum line off the EBC solenoid. Corrected that, which corrected the none-user-error issues (see below). We let the car cool down for a bit.


Here's what happens when you forget to raise the limiter on your EBC (blew the only cool pass on the car) -- 30psi (attempted):


http://i282.photobucket.com/albums/kk252/AHPowelson/Supra%20Dyno%20021411/704RWHP_SAE_boost_issues.jpg


Corrected that and put down this:


http://i282.photobucket.com/albums/kk252/AHPowelson/Supra%20Dyno%20021411/693RWHP_SAE.jpg


UNCORRECTED:


http://i282.photobucket.com/albums/kk252/AHPowelson/Supra%20Dyno%20021411/711RWHP_Uncorrected.jpg


I was tuning for 11.8 at WOT but most pulls after some tuning ended up around 11.4 - 11.5 which was fine with me. I think I could have picked up another 15-20RWHP leaned out to 12.2 or so. My experience is the C16 likes to run at 12 or slightly above. I wanted to err on the side of caution, though.

Switching to a larger AR turbine housing should net another 30-40RWHP. The .70 is hurting me up top, but I love having 30psi at 4600RPM on the street. It's absolutely ridiculous on the street! Next up will be cams, springs, retainers - that should get me near 800RWHP all-boost. I'm considering a 50 shot as the icing to the cake.

TRD diff is installation installation is underway. I've got 27x10.5x16 ET Streets and some 16" CCW skinnies for the business. First track visit is 3/12!

[HellBringer]

Here's some video:


http://www.youtube.com/watch?v=lq-jflRymHk

[green-lantern]

Very nice man!

[NCDirtrider249]

Hey Abram, are you going to Zmax on March 19? It is a NC/SC dsm, evo meet up going on. I think it's 20 dollars for unlimited runs. I'll be there on my Buell probably, see if it has anything for your Supra :)

[DocWalt]

Very nice numbers!

[HellBringer]

Hey Abram, are you going to Zmax on March 19? It is a NC/SC dsm, evo meet up going on. I think it's 20 dollars for unlimited runs. I'll be there on my Buell probably, see if it has anything for your Supra :)




I might go to zMAX on 3/19. I will definitely be at Rockingham the weekend before, though. zMAX absolutely SUCKS for test n tunes -- the lines are painfully long, track prep is non-existent and they do not do a good job of cleaning up after someone breaks. Every time I've been to zMAX it's been a frustrating disappointment.

[NCDirtrider249]

Ahhh that sucks...sounds like a giant disappointment. It's a scheduled test n tune on their calender. So if there will be a shit ton of people (which I'm sure there will be now), I might just drive my car out and not worry about it haha

[HellBringer]

Can't believe I forgot to update this thread...


Anyhey... Short and sweet..



1st trip the track resulted in a hurt clutch but decent times for my first time out with the new setup:



http://www.youtube.com/watch?v=nw03fWUrKYE




2nd trip to the track resulted in a killed clutch but still decent times:




http://www.youtube.com/watch?v=LLONEyC7IUM



Working on the clutch issue and then I'll be back with more boost, less tire pressure and hopefully coming out of the hole off the anti-lag with a lot of boost. I installed HKS coilovers last weekend which should help a LOT with the 60' and overall stability down the track. :bigthumb:

[HellBringer]

1st visit


http://i282.photobucket.com/albums/kk252/AHPowelson/slips_312.jpg



2nd


http://i282.photobucket.com/albums/kk252/AHPowelson/DSCN0110.jpg




Business:


http://i282.photobucket.com/albums/kk252/AHPowelson/drag_s.jpg






Pleasure:





http://i282.photobucket.com/albums/kk252/AHPowelson/HKS_Coilovers_installed1.jpg



Or maybe it's the other way around...? :DevilSmile:

[terrets]

http://i282.photobucket.com/albums/kk252/AHPowelson/HKS_Coilovers_installed1.jpg



Or maybe it's the other way around...? :DevilSmile:

Sexyyy. I love Supras. Cant wait until I can afford one along with the 3000gt.

You dont need a helmet at the track first time round?

Ive never seen a 4 lane track, thats awesome.

She sounds wonderful too.

[IPD]

looks like about a 10.5 pass is possible on the current setup--if you run perfectly. nice going. now go hang out with the supra guys and stop making the 3/s owners feel bad.

[jrod]

Man.. I have been wanting another supra latley.. I am looking for a Auto TT Year does not matter. Miles really dont matter. Its going to be for the wife. If you see something let me know man. And congrats on the Numbers!!

[IPD]

mk4 only?

p.s.

jrod, ukyo has an auto mk4 tt he'd be willing to part with.

http://www.3sgto.org/f2/returning-stock-considering-something-i-never-thought-possible-1344.html

haven't seen anything on it in a while...but he's still got both it and the vr4--and he needs to sell one or the other.

[HellBringer]

terrets -- It was a small semi-private event and they weren't enforcing any safety stuff so I didn't put the helmet on. I hate wearing a damn helmet, anyway!


inperfectdarkness -- I think it has 10.2's in it as it sits. There is a LOT of room for improvement on those runs, especially in the first half of the track; honestly not my best driving effort. My primary concern was just getting the car reasonably out of the hole and down the track for the first time on a bias ply tire. Once I tackle the clutch issue I'll be back to put a serious dent in the ET with more aggressive driving. This fall I'll be implementing the second round of mods (cams, springs, retainers, 28" tire, etc..) and will be shooting for 9.999.


jrod -- There are some really killer deals out there right now. Now is definitely the time to buy while the market is in a temporary slump. The caveat to that is those that don't 'need' to sell aren't even listing the cars while the values are down, so finding a very specific example will be hit or miss. I have been soooo tempted to buy another Supra lately; I want another so much I can taste it. But... Buying another crib this fall is cramping my car budget at the moment. Maybe next year!


PS. ukyo has a poor grasp on the market if he thinks he's going to get 30+ for his wife's brokedick supra. IIRC, it has a good chunk of miles and even the mid-mileage 97-98 autos aren't selling for better than mid/upper 20's right now. When the market rebounds, maybe; but no way in hell right now.

PPS. I find the guys in that thread saying the Supra is so hard to work in hilarious. Mine has been an absolute dream -- easiest car to turns wrenches I've ever owned import and domestic. I've done all the work myself with the exception of the clutch (pain in my ass and no 'glory' in that, IMO) with simple hand tools in garage and it's been a very pleasant and rewarding experience. Everything just works. :)

[jrod]

yea.. that alot step for that car.

I found a white 94 TT Auto car that was org a NA but has a GTE swap ecu etc.. for 11k in Dallas.

[mb7050]

there is always something wrong with those cheap turboed NA supras. I bought one for 16k while ago and man what a mess it was and 11k is dirt cheap..

[HellBringer]

Well I decided to bite the bullet, suck it up and buy an RPS Carbon/Carbon clutch with the upgraded Chromoly flywheel. You only live once and life is too damn short to fight with a subpar clutch. :bigthumb:

[11secondFWD]

I hear ya. I am about to just spend the money on 4 MT ET drags with weld draglite rims. Its only money and life is too short, you might as well have fun and do it right.

[Ninja Performance]

Nice work.

-Chris

[HellBringer]

Problem -- SPEC Super Twin Disk:

http://2475-dragzine.voxcdn.com/files/2010/04/attachment2-320x226.jpg






Solution -- RPS Billet Carbon/Carbon Twin Disk w/ Chromoly flywheel:



http://i282.photobucket.com/albums/kk252/AHPowelson/DSCN0166.jpg

[DocWalt]

carbon clutches are yummy :D

[wraith]

Its great that RPS makes a good CC for the Supra. We already know their product sucks for the 3000gt. I would never buy one for the 3S.

[HellBringer]

The older version with the strapped pressure plate, which utilized a reworked OEM PP like virtually all aftermarket clutches, were known to be a little troublesome. The new Billet pressure plates models (which have been around for several years now) are a complete re-design and have been absolutely bulletproof for the Supra camp. Stock-like engagement and pedal pressure and will hold up to all of the abuse you can throw at it.

I don't think RPS ever updated the 3/s version with a Billet PP; in fact, they don't even list a 3/s model on their site anymore... The only person I know that's really had an issue with theirs has been Ray. AFAIK they've worked well for Matt; I can't really think of anyone else that's used one, or at least provided any feedback, though.

[wraith]

they had about 3-4 re-designs over the years for the 3S. Each seemed like a stab in the dark with no real development testing. Many people on 3Si have bought them and almost every one has had a failure --mostly with the bonded CF on the flywheel or with disintigration/shattering of the carbon discs. I was really interested in the Carbonetics double carbon but there really was no feedback on it. I need 600lb-ft capable clutch so I have renewed interest in these double carbons, but I dont even know if they ever built a decent one for the 3S.

Sam

[HellBringer]

The older strapped versions had a bit of a sordid past with the Supra camp as well. The new billet design, which has been around for 3-4 years now, has proven to be pretty bulletproof.


Carbonetics aka ATS makes GREAT clutches for the Supra -- their triple carbon is a highly regarded. I'm sure anything they make for the 3/s would be of equal quality. However, they are notdesigned (nor will they) with stand up to any drag racing - period. It's a great roadrace and highway pull clutch, but overheating from a drag launch is known to tear them up easily.

[HellBringer]

After a lot of digging around I was finally able source a new turbine housing, so I'll be replacing the super restrictive .70ar divided housing with a .81ar undivided. Everyone I've talked to with reputable experience seems to think it will be worth 30-50WHP on top of what I've got now, with minimal increase in "lag". I think this should put me over the 140MPH barrier with no other changes. The gains will be even more dramatic once I do open things up with cams.

[HellBringer]

http://www.youtube.com/watch?v=Gkidr_T1ruI




Pro Tip: Watch in HD and crank up the volume; it's almost as good as being there. :)



Sorry for the shaky video -- the roads I was on weren't best the best for shooting video; it's all about the sound, anyway. ;) The session was actually cut short due to impending rain so I didn't actually get any of the footage I was intending. I need to get a faster SD card for my camera so I can shoot in 1080i. This was the first time out after putting some miles on the RPS c/c clutch and with the .81 undivided housing on the turbo (previously a .70 divided). She's really woken up with a negligible increase in lag. Enjoy! :bigthumb:

[J_Parker]

I love it! I can't wait to get mine done. You can really notice your camera person getting sucked into the seat, hoping to see more of this one!

[HellBringer]

Yeah, I told my girlfriend to roll the seat all of the way back and try to get a view of the gauges and out the front if possible. In past videos she's just shot out the window in the passengers perspective and they just felt a little lame LOL. Evidently it wasn't the most secure seating position as she got jarred around a lot! I didn't really remember the roads being that bad, but I guess it's a little different when your holding the wheel instead of the camera...

More videos on high boost to come! I'm going to try and get a video or two racing my DR650 Stealth while the soon-to-be new owner is still in town.