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This is a discussion on turbo size/boost within the Forced Induction forums, part of the LSx Technical Help Section category; good call on the pumps quik...
03-19-2009, 05:02 AM #41
- Join Date
- Mar 2009
PBM 366ci TC78 E85
- 2004 Pontiac GTO PBM A4
good call on the pumps quik
03-20-2009, 04:41 PM #42
not sure why an external pump would be considered a bandaid. I run an Aeromotive and no issues with it at all.....
When it comes to turbos there are a number of factors to consider, a/r, trim of the wheel, fuel system, back pressure issues....it goes on and on. You go too small on the exhaust and you'll create too much back pressure and end up choking the turbo. Go with a 76mm turbo with a .81 a/r on the exhaust, and a compressor wheel with a 3.2" inducer and a 2.960" exducer. If you want the part number message me and I'll tell you where to get it. Trust me, this is plenty of turbo for your car.
I believe someone mentioned Turbonetics, I'm just not a big fan of their turbos....personal preference is all
Last edited by cailey37; 03-21-2009 at 08:33 AM.
03-20-2009, 06:55 PM #43
- Join Date
- Mar 2009
04-02-2009, 09:40 AM #44
He didn't rebuild the car after the shootout. The engine before his ERL based-build lasted over 60K miles with a TON of track and street passes. Yes, I was suprised by this as well, but W2W builds good motors. Swapping cranks was a big deal for SBC's with weak cast cranks, but our stock cranks have been proven hundreds of times past 1200rwhp. I have never heard of an LS motor chunking itself over the crank actually... It's the most stout piece in our engine. Fwiw, back when Wheel2Wheel ran their first 6-second pass years ago on a stock-inch LS1 I am almost 100& sure that their car had a stock crank.
*IF* (and this can be a big IF) the tune is RIGHT, the first point of failure would be rod bolts stretching or other rod-related failure. If the tune is not right, you'd lose a piston first.
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