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Old 08-15-2016   #90
A//// Guy
 
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Bloody Seal Bounce Champion!
Join Date: Oct 2003
Location: South Burbs
Drives: Slowly
Posts: 9,870
Re: Project Corvette

Got the car done and on the dyno last week.

Still a few things to work out and fix but nothing too major.
-Speedo doesnt register- taking it to Chevy this week to diagnose
-Modify fender lining to have airflow for the oil cooler
-Wrap headers near oil cooler lines
-Eventually reroute one oil cooler line that is too close to the header

Car made 504whp and 488wtq. Talking to the builder and researching a few things on my end makes me realize why this motor is making less power than the previous. It used to make 5.5psi and around 580whp, now it tops out at 4 and goes down to 3.5 near redline. They didnt log boost on the graph but it makes 4psi right away.


This engine is the same size but I lowered compression from 11.5:1 to 9.5:1 and installed a different SC cam, which is more efficient than the old NA cam.

Notes below that I found, which were interesting and make sense. The engine is fresh as well and not fully broken in yet, so that could cause a little less pressure until the rings are fully seated.

"Improved engine efficiency (HP) means it flows more air. Highly efficient cams should, therefore, lower boost. Expect a 1psi drop from a large enough cam.

Compression ratio affects boost because a lower compression has more cylinder volume for the supercharger to fill. So boost is lower with low compression and greater with higher compression ratios."

More good info:
http://www.kennebell.net/KBWebsite/C...esAndCures.pdf

I plan to do a boost leak test just to be sure the BOV or intake isn't leaking. The way to increase boost is to bore out the restrictor plate in the intake, or remove it entirely, but I think 500whp is enough for now lol..







Exhaust Clip:

http://www.youtube.com/watch?v=OeiIENGGJ5c&hd=1

Last edited by A//// Guy; 08-15-2016 at 03:22 PM..
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