Low (cammed Z06) dyno...
Thread Starter
Staging Lane
Joined: Feb 2008
Posts: 60
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Low (cammed Z06) dyno... Thought i woud throw mine up. It was unusually low for what is done to it. The car made 392rwhp/384rwtq. I am thinking the pushrods are a little short. Im running 7.400" and think running a 7.425" will take some of the valvetrain noise away and get my lift back. This is on a dynojet that is not stingy and the tune is nailed down. What other possibilities could it be other than pushrods?
2001 Z06 (LS6)
-Comp 224/228 .581/.588 114+4
-Comp Pushrods
-Patriot gold duals
-Vararam intake
-Textralia clutch
-LS2 timing chain
-CCA catch can
-Racetronix fuel pump
-LGMotorsports Long tube headers with off road x-pipe
-QTP cutouts (Not open on any of the pulls)
-WCC Smooth bellow
-NGK tr6s (Gapped at .034, Nitrous)
2001 Z06 (LS6)
-Comp 224/228 .581/.588 114+4
-Comp Pushrods
-Patriot gold duals
-Vararam intake
-Textralia clutch
-LS2 timing chain
-CCA catch can
-Racetronix fuel pump
-LGMotorsports Long tube headers with off road x-pipe
-QTP cutouts (Not open on any of the pulls)
-WCC Smooth bellow
-NGK tr6s (Gapped at .034, Nitrous)
Yeah I was gonna say it doesn't seem that bad to me. In the cam only thread in the Stickies there aren't a lot of Cam only cars higher than you without being in the 230+ degree range
OP* longer pushrods wont get you more lift, although it will get you correct lifter preload wich will quiet down the valvetrain. Maybe the knock sensors are picking up the vt noise??
Edit* I would not get too caught up on the dyno numbers!! Lookin at the graph in your other thread, Id say it should pull nicely. Love the tq curve and how well it carry's out past peak. Should be a fun street setup!
Last edited by kinglt-1; Apr 7, 2010 at 12:39 PM.
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Thread Starter
Staging Lane
Joined: Feb 2008
Posts: 60
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Its a 2001 Z06 and the 2002-2004 LS6 had the sodium valves and its a MN12 6spd with 342s. Still i figured with the 2001 Z06 that has a 10.5:1cr, 243 heads, ls6 intake, t.b., intake, longtubes, orx, tuned, etc it would have cracked over 400whp. 2002-2004 Z06s do 390-395whp with headers and tune pretty commonly. I do have a PO327 for a knock sensor, but replaced it with a oreillys one a while back. Going to buy 2 new ones when i get back from vacation. I think the springs are overkill and probaly going to put some 918s in there since it only makes sense. I have the extreme patriot duals that are rated at .660 lift and mines only a .581/.588, maybe i can extract a little more hp from that. Eh, it is what it is, not too worried about it just wondered what some other opinions were. Thats why i spray it 
Last edited by Whiteboy572ci; Apr 7, 2010 at 07:15 PM.
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But someone please correct me if I'm wrong.... it's been stated that during camshaft spintron testing it was noted that the COMP XER lobes are more harsh on valve springs due to the lobes ramp rates, unstableness and jerk, and not necessarily due to the lift. So you may be better off staying with the Duals for added security and longevity.
Contact some of the camshaft guru vendors to get their take on the issue.
Nice power!!!
But someone please correct me if I'm wrong.... it's been stated that during camshaft spintron testing it was noted that the COMP XER lobes are more harsh on valve springs due to the lobes ramp rates, unstableness and jerk, and not necessarily due to the lift. So you may be better off staying with the Duals for added security and longevity.
Contact some of the camshaft guru vendors to get their take on the issue.
But someone please correct me if I'm wrong.... it's been stated that during camshaft spintron testing it was noted that the COMP XER lobes are more harsh on valve springs due to the lobes ramp rates, unstableness and jerk, and not necessarily due to the lift. So you may be better off staying with the Duals for added security and longevity.
Contact some of the camshaft guru vendors to get their take on the issue.
Your correct. And the power the XER adds is a no-brainer.
The power seems about right to me, but I'm confused on the pushrod length...the last thing you do is measure for the proper length to achieve the correct pre-load. I wouldn't guess at the length w/out measuring. To short and your hammering the valvetrain & not getting use of the full cam profile and to long and you risk PTV issues and or valves not closing fully at high RPM's.
Any cam only around 400rwhp is respectfull. Measure for the correct legnth and enjoy....nice ride!
The first cam I put into my ls6 was a 226/226 580/580 114 and it made 386 rwhp. You are in about the right area. Maybe a little low but close. I changed to a 232/232 600/600 and made 403rwhp. My goal was 400rwhp cam and bolt-ons. When the first cam didnt make the numbers the shop changed it to 2nd one for me.
Thread Starter
Staging Lane
Joined: Feb 2008
Posts: 60
Likes: 0
The first cam I put into my ls6 was a 226/226 580/580 114 and it made 386 rwhp. You are in about the right area. Maybe a little low but close. I changed to a 232/232 600/600 and made 403rwhp. My goal was 400rwhp cam and bolt-ons. When the first cam didnt make the numbers the shop changed it to 2nd one for me.
I'd imagine wih the cutouts open, and the addition of a ported throttle body, you should have no problem getting to the 400 mark.
No need to change the springs IMO...leave the good one's in there.
Seems a lil low, make sure you got the right push rods like said, open the cut out's and see what she does then.
Seems a lil low, make sure you got the right push rods like said, open the cut out's and see what she does then.
Thread Starter
Staging Lane
Joined: Feb 2008
Posts: 60
Likes: 0
It was a little colder when i did some pulls and it was stock (like 20-30*F outside) and it was making 349-358rwhp and 351-360wtq. Pretty high for an 01'. I guess cause it was so cold it was higher?? I just bolted the headers on with a rich 11:1afr and 28* of timing and with the intake, and it made 373rwhp/371rwtq on a ~6X* night. Why i think its so low is im guessing a good tune on top of that 373whp would have made roughly 10whp more and put me in the ball park of 385 ish. and after the cam and tune it made 392whp 
The power and torque under the curve are higher, but i still figured i would see 400whp from it.
The power and torque under the curve are higher, but i still figured i would see 400whp from it.