Pass Time?
Team Owner
Joined: May 2001
Posts: 36,836
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From: Dear Karma, I have a list of people you missed.
St. Jude Donor '08-'09-'10-'11-'12-'13-'14-'15-'16
Talk to Doc or Jeff about what they might recommend, like RHS Pro-Elite heads for example or some PRC heads from Texas Speed. They'll give you sound advice.
Thread Starter
Melting Slicks
Joined: Nov 2011
Posts: 2,789
Likes: 3
From: Jacksonville FL
Do some shopping around. You may be very pleasantly surprised. There's a lot of competition in the cylinder head world these days and lot's of good, cost effective, choices.
Talk to Doc or Jeff about what they might recommend, like RHS Pro-Elite heads for example or some PRC heads from Texas Speed. They'll give you sound advice.
Talk to Doc or Jeff about what they might recommend, like RHS Pro-Elite heads for example or some PRC heads from Texas Speed. They'll give you sound advice.
Team Owner
Joined: May 2001
Posts: 36,836
Likes: 243
From: Dear Karma, I have a list of people you missed.
St. Jude Donor '08-'09-'10-'11-'12-'13-'14-'15-'16
Good heads, along with refining your tune, will give you the biggest gain(s).
Thread Starter
Melting Slicks
Joined: Nov 2011
Posts: 2,789
Likes: 3
From: Jacksonville FL
Depends on the particular choice, but all things being equal (same cam, etc), I'd estimate anywhere from 20 to 30 range, maybe a tad more with Doc maximizing your tune. Since you said you have a FAST 102 intake manifold, I'm assuming you already have an LS2 (90mm) throttle body correct? Has it been ported already? If not, I'd recommend Pete Incaudo at VMax Motorsports there in Florida if you choose to do so. He's an expert at TB porting and his prices are reasonable. How about your MAF? Did you also upgrade to the later (larger) Z06 style factory MAF as well?
Good heads, along with refining your tune, will give you the biggest gain(s).
Good heads, along with refining your tune, will give you the biggest gain(s).
Team Owner
Joined: May 2001
Posts: 36,836
Likes: 243
From: Dear Karma, I have a list of people you missed.
St. Jude Donor '08-'09-'10-'11-'12-'13-'14-'15-'16
I haven't had the TB ported. I will contact Pete. What kind of gain do you think that is worth. I also haven't upgraded the MAF. Those two mods may add some throttle response when couple with the FAST, eh? That's good and probably more important to me than added power. But would those mods add any power to speak of? Just trying to gauge if there's decent value in it for the cost.
These two things combined with the fine tuning I would say would give you 5-12hp (~). Sit down with Doc and discuss what your goals are; he's helped many folks just like yourself with the very same, or similar, powertrain set-up and as you know, his tuning expertise with EFI-Live (it's what he uses) will keep a smile on your face.
Le Mans Master
Joined: Feb 2007
Posts: 9,285
Likes: 1,515
From: Oviedo Florida
2024 C5 of the Year Finalist - Modified
2024 C2 of the Year Finalist - Modified
2023 C2 of the Year Finalist - Modified
2021 C2 of the Year Finalist - Modified
2016 C5 of Year Finalist
Instead of guessing why don't you take your vette to the drags
and have a good time. Then you will really know.
and have a good time. Then you will really know.
Team Owner
Joined: May 2001
Posts: 36,836
Likes: 243
From: Dear Karma, I have a list of people you missed.
St. Jude Donor '08-'09-'10-'11-'12-'13-'14-'15-'16
Tech Contributor
Joined: Jan 2007
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From: Dyer, IN
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Thread Starter
Melting Slicks
Joined: Nov 2011
Posts: 2,789
Likes: 3
From: Jacksonville FL
Porting your TB and adding a larger sized MAF will require Doc to tweak on your tune some more, since airflow velocity at idle/low rpm tends to drop (affecting throttle response) when you go to a larger size(s). The larger amount (quantity) of air does benefit you though throughout the mid and upper rpm range and allow for more power at WOT. That's why a good tune is invaluable so your throttle response doesn't suffer in the process.
These two things combined with the fine tuning I would say would give you 5-12hp (~). Sit down with Doc and discuss what your goals are; he's helped many folks just like yourself with the very same, or similar, powertrain set-up and as you know, his tuning expertise with EFI-Live (it's what he uses) will keep a smile on your face.
These two things combined with the fine tuning I would say would give you 5-12hp (~). Sit down with Doc and discuss what your goals are; he's helped many folks just like yourself with the very same, or similar, powertrain set-up and as you know, his tuning expertise with EFI-Live (it's what he uses) will keep a smile on your face.
Thread Starter
Melting Slicks
Joined: Nov 2011
Posts: 2,789
Likes: 3
From: Jacksonville FL
Regarding the track, I may well do that soon but I prefer the curves to the straights. They say you shouldn't take anything to the track that you can't afford to break. Well, I can't afford to break it. Then again, it'd be less risk to go do a couple passes on the drive straight track and I'm sure it'd be good fun too.
Thread Starter
Melting Slicks
Joined: Nov 2011
Posts: 2,789
Likes: 3
From: Jacksonville FL
Yes, they were purchased directly from XS and installed by Loud Pedal in Tempe. I didn't do the install, it was done by the previous owner. I do have an email from XS Power confirming dimensions if you'd like me to forward it to you.
Tech Contributor
Joined: Jan 2007
Posts: 19,246
Likes: 1,093
From: Dyer, IN
Well, there will be a lot of happy people out there. Many have been happy with XS Power, but complained they were only made in 1 3/4.
Team Owner
Joined: May 2001
Posts: 36,836
Likes: 243
From: Dear Karma, I have a list of people you missed.
St. Jude Donor '08-'09-'10-'11-'12-'13-'14-'15-'16
Btw, I think your numbers appear to be somewhat higher than average based on your limited amount of mods thus far.
Safety Car
Joined: Apr 2007
Posts: 3,582
Likes: 136
From: SoCal CA
Question on the headers, I only see there race headers for C6's and they dont mention primary length. Do you have a link or part number for the headers? Im currently looking for 1 7/8 headers for my LS3 swap. Thnx.
Thread Starter
Melting Slicks
Joined: Nov 2011
Posts: 2,789
Likes: 3
From: Jacksonville FL
Lucky and Natie,
I don't have the part number for the 1 7/8 primaries but I have an email confirmation from XS Power. Perhaps emailing them could get you the info you want. I will forward the email if you want it and I have your address. Otherwise, their email address is xs-power@ssautochrome.com
I don't have the part number for the 1 7/8 primaries but I have an email confirmation from XS Power. Perhaps emailing them could get you the info you want. I will forward the email if you want it and I have your address. Otherwise, their email address is xs-power@ssautochrome.com