6266 Supra, stock fuel -- 11.0 @ 130MPH

[HellBringer]

Pertinent mods:

6266 DBB .84 divided housing
PowerHouse Racing turbo kit - open manifold, single gate
4” dp/mp; Apexi N1 catback (necks down to 3” at the flange and then to 3.15”)
Turbosmart 50mm WG
GReddy 3-row
UR Cams gears at +1, -3.5 (previous BPU settings)
OBDII ECU; VPC/AFC NEO
AFPR on the stock FPR return line; base FP @ 45psi
TRD diff; 1-piece chromoly DS
ACT Turbo Xtreme clutch (full-faced organic disk); UR lightened FW
CCW Drag Pack w/ 26" ET streets
Mix of 100 and 110


Dyno:

560WHP at 18.5psi
545WHP at 18psi
525WHP at 17.5psi



The only changes I made following the dyno was I added a Fuelab AFPR off the stock FPR return line so I could bump the base FP up a bit. I did a little street testing and found that 45psi static is the sweet spot to maximize all the OEM fuel pump can offer. I tried 50psi and found that it leaned out earlier up top than at stock fuel pressure, so the pump is the limiting factor now.


On to the runs...




http://i282.photobucket.com/albums/kk252/AHPowelson/DSCN4278_zpsda630985.jpg






1st Pass -- My line lock button wigged out and didn't engage so I just did a quick spin to clean off the tires and went easy on the launch. I walked it out hole with rowed through the gears on an easy pass to check A/F and went 11.39 @ 129.7MPH. Boost peaked at about 18.5psi; A/F was good and never exceeded 11.8.

2nd Pass -- Bumped up the boost 2%. Did a nice smokey burnout to get some heat in the tires and left at 5000RPM (free-rev, no 2-step) with a quick slip. The car left hard and then the RPM's shot up so my instinct was to shift to keep off the limiter and when I banged into 2nd the car fell on its face for a second as the RPM's dropped down to 4000RPM -- turns out it was clutch slip and not tire spin...! Lazy shifts into 3rd and 4th and ended up with 11.0 @ 130.4MPH Damnit!! Boost peaked at a hair over 19psi and A/F touched 12.1 at the top of 3rd.


3rd Pass -- The track was hooking up nice and I still had 16psi in the tires so I did a shorter burnout and tried to get off the clutch a little quicker on the hit. The car left hard and like before once it hit about 6k the RPM's quickly shot up so I pedaled it this time and the clutch grabbed and then bogged a bit so I banged into 2nd and lazily hit 3 and 4 since the run was already killed. Ended up with 11.37 @ 130.2MPH with the best 60' of the day at 1.63. If only...


4th and 5th passes I tried different launch techniques to induce a little more wheelspin to keep the clutch happy but both passes resulted in being blocked out of 2nd gear. I had this issue last summer at BPU levels when I was trying to launch with the 2-step/Antilag box. The clutch heats up and blocks me out of 2nd. Being an organic disk once I put a hundred or so miles of more normal driving on it seems gets better, but either way it's not going to hold up to any more drag racing. I have an RPS C/C on the shelf that I was hoping I wouldn't need until I could turn it up on fuel, but looks like that's next on the agenda. :bigthumb:

[TurboSinceBirth]

Congrats. It has a 10 sec pass in it for sure. Pretty cool seeing how far the stock fuel pump and injectors will take you even if the guys on Supraforums give you a bunch of flak for pushing it too far. I've been looking at the 6466 and 6766 builds over there lately. Any of the 62, 64, or 67 PTE turbos look like an awesome contender for a 3.0L-3.4/3.5L. I hate the feeling of the clutch slipping. At the time I didn't know mine was heating up so much at the track it blocked me out of 2nd just like you described. It's rather annoying and I have been able to replicate it a few times on the street with rolling starts.

[HellBringer]

I'm definitely sold on these new-tech billet turbos. My old T72 Supra only went 95-96MPH in the 1/8 and 125-126MPH in the 1/4 at 18ish psi with a MUCH different powerband. The 62 is the perfect street turbo, IMO. It's super responsive, spools up quick and will still make over 800WHP on kill. It's noticeably more responsive than even my buddy's 6766, though his is journal, a slightly more open AR and he has 264 cams, so it's not quite apples to apples.

I'd put money on it going 10's exactly as it sits EASY with a clean 1-2 shift. Just trying to figure out what to do next. Install the RPS C/C or the cams, etc...? I'm a few months away from picking an EMS so I'll probably do the clutch next since I can't really take advantage of the cams with my fueling limitations.

[mehrshadvr4]

that's a nice trap for the power.

[AdamVR4]

Looks like your sig needs updated? :) Great power. Any billet twins you would recommend for my TD05 headers and future 3.5L? :p

[UTRacerX9]

I'm definitely sold on these new-tech billet turbos.

Definitely. They are able to match the peak power of larger turbos AND come on much sooner in the rev range.

[HellBringer]

that's a nice trap for the power.


130MPH is about right for the WHP and weight. I'm most impressed with 103.5MPH in the 1/8, though. My old T72 Supra only trapped 105-106 in the 1/8 with the .70ar and it dyno'd a little over 700WHP on 3SX's allegedly "stingy" dyno.



Looks like your sig needs updated? :) Great power. Any billet twins you would recommend for my TD05 headers and future 3.5L? :p


My sig is wayyyy out of date and even has a typo in it (should be 125MPH and not 122)...! Hell, I replaced the green Supra with a new monster several weeks ago, so it's way overdue for an update. I'm very pleased with the power at such low boost. I'm glad I decided to give the 62 a try because I originally planned to jump straight to the 67. No direct suggestions on billet TD05's, but JRink's car comes to mind -- whatever he's running is definitely working!




Definitely. They are able to match the peak power of larger turbos AND come on much sooner in the rev range.


Fo'sho! This 62 spools like a 57 and makes power like a 72!