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Old 02-12-2012   #17
RHanselman
 
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Join Date: Jul 2005
Location: Cresson, TX
Posts: 970
Default Re: Dyno Pull yesterday (OBX Headers)

Quote:
Originally Posted by rhipsher View Post
Although Im glad to see the increase in hp do to headers and by no means want to burst any bubbles but 309rwhp tells me there's a problem somewhere. At the very least a healthy stock LT5 should put down 325rwhp. Mine put down 340rwhp 335 ft with stock manifolds and just an old Borla. Mine once dynoed at 309 only because my drivers side cat decided to expload and exit the exuast and Corey took his foot off the gas. Corey said it was actually pretty awesome. A big flame shot out the muffler and honeycomb substrait hit the wall. Lol!
Yep, my 91 was about average, stock with B&B's and some light plenum porting by Aaron in the old days. It did 346 and 337.

This is from Marc's website:

Upgrade: '90-'92

Original equipment engine power 375

Low back pressure exhaust system +10

Performance engine calibration (chip) +10

Subtotal 395
Long Tube Headers +25
Subtotal 420
420x.85=357

So not too far off...

Cheers,
RH
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