Help with heads !!
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Teching In
Joined: Feb 2009
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From: Dayton OH
Help with heads !! I put on TSP PRC Stage 1.0 LS6 CNC Ported Heads and only gained 10 WRHP
WTF !?!? I know here is more HP but where ?
I have233in 239ex 595 605 lift cam,Slp LT,LM1,S2TB,3600 stall, LS6 intake,SLP CAI, On 1998 Trans Am WS6
HELP!!!
WTF !?!? I know here is more HP but where ?
I have233in 239ex 595 605 lift cam,Slp LT,LM1,S2TB,3600 stall, LS6 intake,SLP CAI, On 1998 Trans Am WS6
HELP!!! Last edited by erickprouty; Sep 14, 2010 at 05:08 PM.
Need more specs on that camshaft to start. And I agree, if you haven't already retuned, do so. Do you have a before/after graph from the same dyno and same/similar weather conditions?
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From: Turnin' Wrenches Infractions: 005
I think they are asking for the specific cam specs. (all specs including what lobes its cut on and where it came from) Also, details about your first dyno, and details about your second or after dyno. My questions-->>>And how experienced is the tuner? All other mods done to the car. Help us help you.
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I'd set AFR's so they read 12.7:1 @ WOT and start @ 25* of timing flat @ WOT from 2800rpm on up to redline. Use that as a safe baseline pull (watch for KR). Add in 2* and do another pull (watch for KR). If more power was made and no KR, add in 2* more and do another pull (watch for KR). I wouldn't go past 30* of timing. You'll see where the sweet spot is when it stops making power - don't just keep adding until you see KR. My bet is you'll find best numbers around 28*. If you see KR, it'll most likely appear between 4500~5500rpm.
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Ouch I'm saddened to see this, I was just looking at the PRC ls6 heads. Wondering if these heads were kinda just passed on thru and never went into the cnc machine? Bc a stock 243 head usually gains 10-15rwhp over stock.
That's an impossibility. Something else is wrong with the combo causing the low numbers.
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Thread Starter
Teching In
Joined: Feb 2009
Posts: 15
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From: Dayton OH
I'd set AFR's so they read 12.7:1 @ WOT and start @ 25* of timing flat @ WOT from 2800rpm on up to redline. Use that as a safe baseline pull (watch for KR). Add in 2* and do another pull (watch for KR). If more power was made and no KR, add in 2* more and do another pull (watch for KR). I wouldn't go past 30* of timing. You'll see where the sweet spot is when it stops making power - don't just keep adding until you see KR. My bet is you'll find best numbers around 28*. If you see KR, it'll most likely appear between 4500~5500rpm.
Last edited by erickprouty; Sep 14, 2010 at 11:06 PM.
OP: Did you have any luck getting us a dyno graph for before/after? Any chance they locked the stall for the before and dyno'd it unlocked for the after?
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POWERBOND - ASP - AND MORE!
Largest Stocking Distributor of LS-x Engines / CHECK OUT OUR NEW WEBSITE!
COMP - FAST - PACESETTER - DIAMOND RACING - EAGLE SPECIALTY PRODUCTS - CALLIES - COMETIC GASKETS
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KR = Knock retard - the PCM will pull timing if the knock sensors detect detonation in the motor.
Timing might be too high causing you to lose power. Just because a motor can take extra timing doesn't mean you should run that much. I'd be curious to see the numbers around 27 or 28 degrees of timing.
Timing might be too high causing you to lose power. Just because a motor can take extra timing doesn't mean you should run that much. I'd be curious to see the numbers around 27 or 28 degrees of timing.
Thread Starter
Teching In
Joined: Feb 2009
Posts: 15
Likes: 0
From: Dayton OH
Thread Starter
Teching In
Joined: Feb 2009
Posts: 15
Likes: 0
From: Dayton OH
KR = Knock retard - the PCM will pull timing if the knock sensors detect detonation in the motor.
Timing might be too high causing you to lose power. Just because a motor can take extra timing doesn't mean you should run that much. I'd be curious to see the numbers around 27 or 28 degrees of timing.
Timing might be too high causing you to lose power. Just because a motor can take extra timing doesn't mean you should run that much. I'd be curious to see the numbers around 27 or 28 degrees of timing.
Thread Starter
Teching In
Joined: Feb 2009
Posts: 15
Likes: 0
From: Dayton OH
