What did you do today to your 3/S?

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Originally Posted by JasonY

Nah, no stroker for this build. The cost isnt just the engine, its everything else that needs to added to support the extra power.

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I feel compelled to get away from the stock 72 crank. It just flexes so much that regular abuse at reasonable power levels (550-600 AWHP) is enough to crack it. The 74 has to be a bit more rigid thanks to the slightly larger diameter journals and based on anecdotal evidence, it seems to reliably support a bit more power... of course it's nothing like the custom Pampena/Merkel cranks, but at the same time, if something goes wrong and I destroy a 74 crank, I won't want to kill myself like I would if I destroyed one of the custom cranks. I want to drive my car a lot more than I have been the last several years and I don't want to have to even think about inspecting engine bearings or worrying about oil pressure.

What kind of power levels are you hoping to achieve with the 72 crank?

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Originally Posted by AdamVR4

I feel compelled to get away from the stock 72 crank. It just flexes so much that regular abuse at reasonable power levels (550-600 AWHP) is enough to crack it. The 74 has to be a bit more rigid thanks to the slightly larger diameter journals and based on anecdotal evidence, it seems to reliably support a bit more power... of course it's nothing like the custom Pampena/Merkel cranks, but at the same time, if something goes wrong and I destroy a 74 crank, I won't want to kill myself like I would if I destroyed one of the custom cranks. I want to drive my car a lot more than I have been the last several years and I don't want to have to even think about inspecting engine bearings or worrying about oil pressure.

What kind of power levels are you hoping to achieve with the 72 crank?

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Are u talking about The forged 72 crank, cast, or both?? With those comments I can say I see a 6g74 in your future lol.

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Originally Posted by AdamVR4

I feel compelled to get away from the stock 72 crank. It just flexes so much that regular abuse at reasonable power levels (550-600 AWHP) is enough to crack it. The 74 has to be a bit more rigid thanks to the slightly larger diameter journals and based on anecdotal evidence, it seems to reliably support a bit more power... of course it's nothing like the custom Pampena/Merkel cranks, but at the same time, if something goes wrong and I destroy a 74 crank, I won't want to kill myself like I would if I destroyed one of the custom cranks. I want to drive my car a lot more than I have been the last several years and I don't want to have to even think about inspecting engine bearings or worrying about oil pressure.

What kind of power levels are you hoping to achieve with the 72 crank?

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I plan to run the piss out of the 72 crank and hope for the best. Im putting a brand new crank in with my forged bits and hope to get 2 years of use out of it before needing to address the flex issues and bearing wear.

Im shooting for 700+ wheel, but the car will mostly be in the mid 500's i figure on pump/meth, maybe 600 if im feeling lucky or not.

I think ray offers a custom replacement not for the 72 that addresses the flex issues...Or im completely remembering something incorrectly.

I personally wanted to avoid going 3.5L due to having that extra potential just sitting there waiting to be tapped. Its just such another step up in supporting mods and further drivetrain issues im not sure id be happy with only sliding my powerband 500-1000rpms to the left and not adding bigger turbos and more power at the same time. The 6spd drivetrain is fragile enough at 500 wheel and im already eying 17x9 rotas with 26x8.5x17 M&H slicks for the track i already feel like i need to start stocking up on spare transfer cases...lol I already have a bellhousing brace and daves end case and will be installing the pampena 300m rear axles, so the TC is the weak link now...fail. So more torque i just see inviting more problems...

Jason

Has anyone fragged the 6 speed TC with raw power though? I always thought it was a shock loading thing. TCs are cheap anyway. :)

AFAIAC 6G74 is the way to go if you have the means to install and tune it.

Anyway, back on topic. I installed this:

http://i440.photobucket.com/albums/q...0091230_03.jpg

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Originally Posted by Intropy

Has anyone fragged the 6 speed TC with raw power though? I always thought it was a shock loading thing. TCs are cheap anyway. :)

AFAIAC 6G74 is the way to go if you have the means to install and tune it.

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We'll see, i actually use a lot of clutch when getting the car out of the hole compared to some people. Hopefully that keeps the gears happy. Trevor ran his stocker for-ever and i still believe he does despite breaking two or three transmissions.

Jason

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Originally Posted by JasonY

I plan to run the piss out of the 72 crank and hope for the best. Im putting a brand new crank in with my forged bits and hope to get 2 years of use out of it before needing to address the flex issues and bearing wear.

Im shooting for 700+ wheel, but the car will mostly be in the mid 500's i figure on pump/meth, maybe 600 if im feeling lucky or not.

I think ray offers a custom replacement not for the 72 that addresses the flex issues...Or im completely remembering something incorrectly.

I personally wanted to avoid going 3.5L due to having that extra potential just sitting there waiting to be tapped. Its just such another step up in supporting mods and further drivetrain issues im not sure id be happy with only sliding my powerband 500-1000rpms to the left and not adding bigger turbos and more power at the same time. The 6spd drivetrain is fragile enough at 500 wheel and im already eying 17x9 rotas with 26x8.5x17 M&H slicks for the track i already feel like i need to start stocking up on spare transfer cases...lol I already have a bellhousing brace and daves end case and will be installing the pampena 300m rear axles, so the TC is the weak link now...fail. So more torque i just see inviting more problems...

Jason

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I'm looking at this guy with a new OEM crank:
Pampena Motorsports 6G72 Stroker 3.5 Liter - Pampena Motorsports

I've got the drive train to tolerate a bit more torque, I think. I need to weld a brace into my new 5 spd (old one is braced but disassembled), but it's not nearly the issue that it is with the 6's. I also need to upgrade my differentials (brand new front/center, ~116K on the rear).

My goal isn't to make a bunch more power. It's to make a little more power with a much higher safety factor than I've ever had.

Out of curiosity, since you dont have anything invested in 72 rods that you are wanting to reuse, why not build a 74? If you bust a 74 crank, you won't have to spend the extra $900 machine work to get another crank to fit the 72 again. Just balance to your rods/pistons.

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Originally Posted by familyMAN

Out of curiosity, since you dont have anything invested in 72 rods that you are wanting to reuse, why not build a 74? If you bust a 74 crank, you won't have to spend the extra $900 machine work to get another crank to fit the 72 again. Just balance to your rods/pistons.

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Beyond all the extra work associated with fitting a 74, I'll use my current engine to build a 3.0L, and it's important to me that my 2 engines be interchangeable. $900 worth of machine work doesn't intimidate me. The only thing that worries me is the long term availability of Ray's pistons and rods.

Makes sense:). BTW the 72 stroker uses 72 rods, so no problem with availability. Ross is making Rays pistons so you should be good if Ray goes AWOL on us. If for some reason, both Ray and Ross disappear, anybody (JE, wiseco, etc) can make custom pistons for your application. No worries there either.