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Performance, Brainstorming & Tuning Talk about modifications, or anything else associated with performance enhancements. Have a new idea for performance/reliability? Post it here. No idea is stupid! (please use Detailing and Appearance for cosmetic ideas)

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Old 02-09-2004, 01:51 PM   #11
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Yup. Thanks Sal, I left that one out.
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Old 02-09-2004, 01:59 PM   #12
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Wouldn't you need a new underdrive pulley as well for the two belts?

Use a CSC or Turbo before that. But if someone could come up with a nice custom intercooler that fits bewteen a stock N/A manifold, and an M90/112/62 i'd like that
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Old 02-09-2004, 02:37 PM   #13
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Yup. The crank pulley needs to be changed to handle both belts, and an idler needs to be added along with the alternator and PS pump relocation.
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Old 02-09-2004, 02:55 PM   #14
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wow, sounds like a lot of expensive work for something that can be done better for cheaper. You mentioned L67s used forged rods and pistons, what stock psi does a L67 run at? I think he could run a supercharger at 6psi on cast internals and be fine?
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Old 02-09-2004, 03:17 PM   #15
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Quote:
Originally Posted by 95gsr
wow, sounds like a lot of expensive work for something that can be done better for cheaper. You mentioned L67s used forged rods and pistons, what stock psi does a L67 run at? I think he could run a supercharger at 6psi on cast internals and be fine?
I believe 8psi stock. I think. Seems to hold up fine with that.
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Old 02-09-2004, 03:23 PM   #16
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Stock N/A should be able to take 6-8psi fine. nearly all conventional engines could.

harder part of super/turbocharging, is the PCM upgrades and fuel system.
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Old 02-09-2004, 04:29 PM   #17
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Quote:
Originally Posted by jr's3800
I just want to throw in one thing here.... The L67 has 8.5 to 1 compression pistons in it.... The L36 or NA'd 3800 II has 9.4 to 1 compression pistons in it.... With the 9.4 to 1 compression wouldn't you have to have an intercooler, or could you just drop the boost? For the cost of doing this wouldn't it be cheaper to get an L67 from a wrecker?
Much easier to drop it in from a wrecker. Isn't the L27 compression a lot lower then the L36 though?
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Old 02-09-2004, 04:53 PM   #18
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Quote:
Originally Posted by BonneMeMN
Stock N/A should be able to take 6-8psi fine. nearly all conventional engines could.

harder part of super/turbocharging, is the PCM upgrades and fuel system.
But remember that the L67 comes with the HD version of the tranny... with supercharging it and all of the added strain on it, and your asking for a short tranny life
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Old 02-09-2004, 06:25 PM   #19
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Gotta show love for the L27!!

So the L36 got a totally new head design, higher compression, and higher rev line, but only got 5 more ft/lb out of it? I know the Higher RPM and higher torque peak gave more HP....
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