Heads only questions
01-28-2009, 09:44 AM
#23
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Heres something I posted on another C5 forum a few weeks ago.
I finished adding these parts about two weeks ago. Dyno results coming soon.
99 FRC
Blackwing, ported TB, WCCH 5.3 L stage 2.5 heads, 2.02/1.57 w/ 63 cc chambers, 10.85:1 SCR (had stock 853 heads), MLS gasket, LS6 intake, stock cam (for now), LG Street headers, high flow cats, Borla Stingers and a tune from Ed Hutchings. I'm thinking 50 rwhp is not an unreasonable expectation with these add ons.
I finished adding these parts about two weeks ago. Dyno results coming soon.
99 FRC
Blackwing, ported TB, WCCH 5.3 L stage 2.5 heads, 2.02/1.57 w/ 63 cc chambers, 10.85:1 SCR (had stock 853 heads), MLS gasket, LS6 intake, stock cam (for now), LG Street headers, high flow cats, Borla Stingers and a tune from Ed Hutchings. I'm thinking 50 rwhp is not an unreasonable expectation with these add ons.
01-28-2009, 09:45 AM
#24
PM'd ya back. I'll help any way I can!!!
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Jason
Co-Owner, Texas Speed & Performance, Ltd.
2005 Twin Turbo C6
404cid Stroker, 67mm Twins
994rwhp/902lb ft @ 22 psi (mustang dyno) www.Texas-Speed.com
01-28-2009, 09:59 AM
#26
Heres something I posted on another C5 forum a few weeks ago.
I finished adding these parts about two weeks ago. Dyno results coming soon.
99 FRC
Blackwing, ported TB, WCCH 5.3 L stage 2.5 heads, 2.02/1.57 w/ 63 cc chambers, 10.85:1 SCR (had stock 853 heads), MLS gasket, LS6 intake, stock cam (for now), LG Street headers, high flow cats, Borla Stingers and a tune from Ed Hutchings. I'm thinking 50 rwhp is not an unreasonable expectation with these add ons.
I finished adding these parts about two weeks ago. Dyno results coming soon.
99 FRC
Blackwing, ported TB, WCCH 5.3 L stage 2.5 heads, 2.02/1.57 w/ 63 cc chambers, 10.85:1 SCR (had stock 853 heads), MLS gasket, LS6 intake, stock cam (for now), LG Street headers, high flow cats, Borla Stingers and a tune from Ed Hutchings. I'm thinking 50 rwhp is not an unreasonable expectation with these add ons.
01-28-2009, 10:02 AM
#27
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No previous dyno results. I'm just going to use the stock dyno numbers that many others have shown on dyno runs. Generally around 305 rwhp for this year with an M6. I know its not the most scientific way but hey, thats what I've got.
01-28-2009, 10:29 AM
#28
hmmm, never got it Jason.
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01-28-2009, 11:51 AM
#29
You hear a lot about running cam only on stock heads, but very rarely about heads only on stock cam. I have heard of a few instances and was pretty impressed with the results.
Pretty much what could I expect from bolt ons only with a set of ported LS6 or LS2 heads?
Would there be benefits to milling them to up the CR a tad?
Would you not touch the limiter since it would still be a stock cam?
What would be required tuning wise?
Any results out there with a similar set-up? Thanks!
Pretty much what could I expect from bolt ons only with a set of ported LS6 or LS2 heads?
Would there be benefits to milling them to up the CR a tad?
Would you not touch the limiter since it would still be a stock cam?
What would be required tuning wise?
Any results out there with a similar set-up? Thanks!
https://ls1tech.com/forums/dynamomet...stock-cam.html
01-28-2009, 03:01 PM
#31
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243's may require a little bit of a cam, though a set of 5.3 heads may be the way to go just for some compression. Cant go wrong with 241's and some rockers, seems to work really well on my car. Like earlier said in this thread, 30 rwhp is easily acheivable. Thats what I picked up with just the head swap and no other changes other than touching up the tune.
01-28-2009, 03:29 PM
#32
Did you need a tune after a head swap? I would think the stock tune would work pretty good but just wondering if you had any issues driving the car on the old tune after the swap.
01-28-2009, 03:35 PM
#33
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Heads only ?? I am very interested. I too would love to see how a set of afr 205's react to a stock cam. Would you be milling the heads ?
I reused my h/c from my 346 on my new 402 and picked up tons of power under the curve. Hows +60 rwhp and +75 rwtq at 4000 rpms sound ?? I also picked up 20 rwhp and 55 rwtq at PEAK. Can't wait to drive it.
I reused my h/c from my 346 on my new 402 and picked up tons of power under the curve. Hows +60 rwhp and +75 rwtq at 4000 rpms sound ?? I also picked up 20 rwhp and 55 rwtq at PEAK. Can't wait to drive it.
01-28-2009, 05:16 PM
#34
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The car wanted lots less timing up top. Zero issues with driveability, other than a little knock.
01-28-2009, 10:36 PM
#35
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how would the 243s react with a ls6 cam? do you think that would that be enough cam? i want excellent driveability and a stock sound but i also want it to fly when i get on it...
01-29-2009, 07:39 AM
#37
My logic exactly. Sounds like a good plan, I'm thinking you could put down 400/400 and sound pretty much like a bolt on car..... and still drive like one as well!
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01-29-2009, 07:58 AM
#38
If you look at greenbean's graph, it starts around 2,600-2,700 RPM. And even at that low RPM range he's making about 370 ft. lbs. of torque 
and it just builds from there. To me there's no down side, and if I get tired of the power and want more I just throw a different cam in it and make some really good numbers.
and it just builds from there. To me there's no down side, and if I get tired of the power and want more I just throw a different cam in it and make some really good numbers.
01-29-2009, 08:10 AM
#39
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So you don't want mama to find out?
01-29-2009, 09:35 AM
#40
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