Thunder Racing 219/236 cam
Last edited by had2have-it; Nov 29, 2011 at 10:27 PM.
New, ported 243's are only a couple of hundred more than that - the difference would be eaten up quickly in shipping, plus the new ones come with good springs, new valves, titanium retainers etc.
I think I'd be very happy with ported 243's for what I expect out of it.
The Best of Corvette for Corvette Enthusiasts
214/232 and .607/.598 on a 117 LSA
I like the slightly shorter duration and wider LSA
bartmanC5
I'm running a 2002 C5 M6 Convertible (68k miles), and am working up the nerve for my first heads/cam project this winter. My car currently is stock but for axle-back exhaust, and already has LS6 intake, LS6 28lb injectors. Fair-weather summer daily driver, 95% street use but a couple track events each Hyear. Most driving is sub-5k RPM, so I like my torque. I like the current exhaust note (but could use some lope), and the stock power level is nearly adequate.
I have a leaking front seal and wouldn't mind a bump in power while I'm tearing it open. Trying to do a budget build, doing my own work except the tune. I don't want to go long-tubes, nor do I want a 500hp tire-eating monster.
So far I've picked up a K&N FIPK air intake, new lifters, and a low mile take-off bundle: '03 Z06 LS6 heads (sodium valves) / cam / rods / springs. Gaskets, dampner, timing chain, and oil pump TBD.
It would seem I am nearly there for a Z06 conversion if I wanted it. Except I used the search here and came up with several discussions about torquey cams using stock manifolds, one in particular. It sounds right up my alley, and nearly identical to my configuration.g
(2009) 218/230 .595/.598 115LSA +4 EPS Cam 403 rwhp LS1 with stock exhaust manifolds and mild cam
http://www.ls1tech.com/forums/dynamo...-mild-cam.html
Sorry for all the questions - I've been chewing on this for a while. I'm torn between the LS6 versus 218/230 cam.
Will this cam have a noticeable lope, or is it really "stealth"?
I would get new springs and rods for the higher lift. What about rockers, fuel injectors, something else?
Is the original clutch heading for trouble, or should it hold either?
Any other parts upgrades suggested while I'm in there?
Cost-wise, the EPS route adds at least $700+ to the project, but can recoup some of that by selling the Z06 cam & springs.
Both cams bump the rev limiter, but the EPS would have better area under the curve? Z06 would probably net 370 rwhp, but 400+ with the EPS is tempting.
After the cam swap, will I need to trailer the car to the tuner, or should it be drivable for 40 miles?
Does anyone have an LS1 cam vs LS6 cam dyno overlayed on the same graph? I'm curious if I should see the +30TQ from 2200rpm all the way up like the EPS, or which one "wins" at lower rpm.
Thanks for any input.
__________________
Bart
I recommend spending the $25 and have PatG or Geoff spec you cam, the off the shelf grind may have you leaving some power on the table... This is where this guy is
*
" Ok, after a few back-n-forths with Patrick I'm settled on a cam. His suggestion:
222 / 226 115LSA +3, .597 / .598 lift.
PAC 1518's, Untouched 243s, retainers, and locks. 6600 rpm limit.
SCR 10.5, DCR 8.20 He bumped up intake & down exhaust duration "because of the Vette's light weight and better than typical cat-back exhaust". He suggested the 222/226 would match the 218/230 in the lower RPMs, but would excel in the higher RPMs."
I've settled on avoiding the cost of head-work for now since the 243's are nice and tight. The remaining debate is over the target CR, and I'm leaning toward option 1.
1) Use Cometic .040" gasket for 10.9:1 CR, and switch to 91 octane. DCR bumps to 8.4.
2) Stick with GM MLS gasket for 10.5:1 CR and lower 89 octane.
Last edited by hardcore4sure; Dec 1, 2011 at 12:59 PM.
bartmanC5
I'm running a 2002 C5 M6 Convertible (68k miles), and am working up the nerve for my first heads/cam project this winter. My car currently is stock but for axle-back exhaust, and already has LS6 intake, LS6 28lb injectors. Fair-weather summer daily driver, 95% street use but a couple track events each Hyear. Most driving is sub-5k RPM, so I like my torque. I like the current exhaust note (but could use some lope), and the stock power level is nearly adequate.
I have a leaking front seal and wouldn't mind a bump in power while I'm tearing it open. Trying to do a budget build, doing my own work except the tune. I don't want to go long-tubes, nor do I want a 500hp tire-eating monster.
So far I've picked up a K&N FIPK air intake, new lifters, and a low mile take-off bundle: '03 Z06 LS6 heads (sodium valves) / cam / rods / springs. Gaskets, dampner, timing chain, and oil pump TBD.
It would seem I am nearly there for a Z06 conversion if I wanted it. Except I used the search here and came up with several discussions about torquey cams using stock manifolds, one in particular. It sounds right up my alley, and nearly identical to my configuration.g
(2009) 218/230 .595/.598 115LSA +4 EPS Cam 403 rwhp LS1 with stock exhaust manifolds and mild cam
http://www.ls1tech.com/forums/dynamo...-mild-cam.html
Sorry for all the questions - I've been chewing on this for a while. I'm torn between the LS6 versus 218/230 cam.
Will this cam have a noticeable lope, or is it really "stealth"?
I would get new springs and rods for the higher lift. What about rockers, fuel injectors, something else?
Is the original clutch heading for trouble, or should it hold either?
Any other parts upgrades suggested while I'm in there?
Cost-wise, the EPS route adds at least $700+ to the project, but can recoup some of that by selling the Z06 cam & springs.
Both cams bump the rev limiter, but the EPS would have better area under the curve? Z06 would probably net 370 rwhp, but 400+ with the EPS is tempting.
After the cam swap, will I need to trailer the car to the tuner, or should it be drivable for 40 miles?
Does anyone have an LS1 cam vs LS6 cam dyno overlayed on the same graph? I'm curious if I should see the +30TQ from 2200rpm all the way up like the EPS, or which one "wins" at lower rpm.
Thanks for any input.
__________________
Bart
I recommend spending the $25 and have PatG or Geoff spec you cam, the off the shelf grind may have you leaving some power on the table... This is where this guy is
*
" Ok, after a few back-n-forths with Patrick I'm settled on a cam. His suggestion:
222 / 226 115LSA +3, .597 / .598 lift.
PAC 1518's, Untouched 243s, retainers, and locks. 6600 rpm limit.
SCR 10.5, DCR 8.20 He bumped up intake & down exhaust duration "because of the Vette's light weight and better than typical cat-back exhaust". He suggested the 222/226 would match the 218/230 in the lower RPMs, but would excel in the higher RPMs."
I've settled on avoiding the cost of head-work for now since the 243's are nice and tight. The remaining debate is over the target CR, and I'm leaning toward option 1.
1) Use Cometic .040" gasket for 10.9:1 CR, and switch to 91 octane. DCR bumps to 8.4.
2) Stick with GM MLS gasket for 10.5:1 CR and lower 89 octane.












