Question about pcm tuning...
Thread Starter
Joined: Nov 2001
Posts: 8,259
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From: Valrico, Florida
Question about pcm tuning... I spoke with Ed about tuning when I add the future high compression heads.. He said I am going to need a lot of timing taken out.. Can I just use a maft? How many of you guys are running 11.1:1 compression on stock pcm's with no issues?
I can shift faster than you.
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From: Baton Rouge, LA
Re: Question about pcm tuning... [quote]Originally posted by vmoore:
<strong>How many of you guys are running 11.1:1 compression on stock pcm's with no issues?</strong><hr></blockquote>
Over 11.1:1 compression w/ stock MAF and hpp3 tuning and 0 problems and the car is running just great!
Jason
<strong>How many of you guys are running 11.1:1 compression on stock pcm's with no issues?</strong><hr></blockquote>
Over 11.1:1 compression w/ stock MAF and hpp3 tuning and 0 problems and the car is running just great!
Jason
Thread Starter
Joined: Nov 2001
Posts: 8,259
Likes: 4
From: Valrico, Florida
Re: Question about pcm tuning... Jason I already have my pcm programmed by Ed.. I have the LS6 MAF.. Right now my car is dead on. No issues what so ever. Autotap is perfect.. My question would be is Ed Wrights programming going to adapt to the high compression or are they set in stone..
[ November 13, 2001: Message edited by: vmoore ]</p>
[ November 13, 2001: Message edited by: vmoore ]</p>
I can shift faster than you.
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From: Baton Rouge, LA
Re: Question about pcm tuning... What kind of timing are you seeing now? I see 29* at WOT. I think this is plenty for where I'm at. You might have to send it back to Ed for some tweaking, but I would defintely try it as is and see what happens.
Jason
Jason
Re: Question about pcm tuning... Be careful...a car with 10:0-1 compression with 28-30 degrees of timing will make more power than the same motor with 11:0-1 compression and 24 degrees of timing. The tune-up is critical and you need plenty of timing for ideal power.
Adding compression but backing off timing is self-defeating. You need to match the cam to take advantage of the increased compression that will allow you to continue using 28-30 degrees of timing.
Adding compression but backing off timing is self-defeating. You need to match the cam to take advantage of the increased compression that will allow you to continue using 28-30 degrees of timing.
__________________
2013 Corvette Grand Sport A6 LME forged 416, Greg Good ported TFS 255 LS3 heads, 222/242 .629"/.604" 121LSA Pat G blower cam, ARH 1 7/8" headers, ESC Novi 1500 Supercharger w/8 rib direct drive conversion, 747rwhp/709rwtq on 93 octane, 801rwhp/735rwtq on race fuel, 10.1 @ 147.25mph 1/4 mile, 174.7mph Half Mile.
2016 Corvette Z51 M7 Magnuson Heartbeat 2300 supercharger, TSP LT headers, Pat G tuned, 667rwhp, 662rwtq, 191mph TX Mile.
2009.5 Pontiac G8 GT 6.0L, A6, AFR 230v2 heads. 506rwhp/442rwtq. 11.413 @ 121.29mph 1/4 mile, 168.7mph TX Mile
2000 Pewter Ram Air Trans Am M6 heads/cam 508 rwhp/445 rwtq SAE, 183.092 TX Mile
2022 Cadillac Escalade 6.2L A10 S&B CAI, Corsa catback.
2023 Corvette 3LT Z51 soon to be modified.
Custom LSX tuning in person or via email press here.
2013 Corvette Grand Sport A6 LME forged 416, Greg Good ported TFS 255 LS3 heads, 222/242 .629"/.604" 121LSA Pat G blower cam, ARH 1 7/8" headers, ESC Novi 1500 Supercharger w/8 rib direct drive conversion, 747rwhp/709rwtq on 93 octane, 801rwhp/735rwtq on race fuel, 10.1 @ 147.25mph 1/4 mile, 174.7mph Half Mile.
2016 Corvette Z51 M7 Magnuson Heartbeat 2300 supercharger, TSP LT headers, Pat G tuned, 667rwhp, 662rwtq, 191mph TX Mile.
2009.5 Pontiac G8 GT 6.0L, A6, AFR 230v2 heads. 506rwhp/442rwtq. 11.413 @ 121.29mph 1/4 mile, 168.7mph TX Mile
2000 Pewter Ram Air Trans Am M6 heads/cam 508 rwhp/445 rwtq SAE, 183.092 TX Mile
2022 Cadillac Escalade 6.2L A10 S&B CAI, Corsa catback.
2023 Corvette 3LT Z51 soon to be modified.
Custom LSX tuning in person or via email press here.
Thread Starter
Joined: Nov 2001
Posts: 8,259
Likes: 4
From: Valrico, Florida
Re: Question about pcm tuning... My question is will my timing automatically drop off just by adding the heads? I have the T1 cam if someone could figure out if my timing would decrease with just the addition of heads above 11.1:1 compression.. Someone mentioned on another forum that going .030 on a 10.1:1 head would bring you up to 10.7:1. Would the same result happen to a 11.1:1 head?
