ok what size pushrods should i get for my 02 z06 cam in a 04 4.8?
thanks danny
ok what size pushrods should i get for my 02 z06 cam in a 04 4.8?
thanks danny
04 4.8 FIPK, Pacesetter long tubes, dual exhaust with x-pipe and Dynomax race bullits, gutted cats, 160 therm, hypercrap programmer
Future mods-p/p thottle body, 02 z06 cam, within the mth. 4:11 g80 soon after......just tryin to blow my tranny
I think you will need 7.35" push rods if the heads haven't been milled or anything but I would ask the people your gonna order them from to make sure.
[1/8 mile E.T. - 8.23 @ 82.86 mph w/1.82 60'] '98swb,4/6drop,20"RozziDeeps on 275/40ToyoProxes '98LS1/4L60E,TRCheaTR cam,Ported TB,Billet MAF ends,MSD8.5 superconductor wires,S&P midlengths,!EGR,!cats,2 1/2" true duals w/X-pipe,Dynomax Ultraflows,TCI 3000,billet servo,TCI deep aluminum pan,3.73's w/Auburn posi; Eclipse CD, Rockford 6 1/2's, Memphis 12's, Punch 200 ix, Punch 500x
actually ur gonna need longer, 7.425" or even 7.45" if you can find em! The stock are 4.700" and they are just a hair too short with that cam.
Chris
2009 Silverado, HPTuners, all stock.
<div class='quotetop'>QUOTE(chrisj6 @ Jan 23 2006, 07:45 PM) [snapback]41995[/snapback]</div>Ya your right I had it backwards.actually ur gonna need longer, 7.425" or even 7.45" if you can find em! The stock are 4.700" and they are just a hair too short with that cam.
Chris
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[1/8 mile E.T. - 8.23 @ 82.86 mph w/1.82 60'] '98swb,4/6drop,20"RozziDeeps on 275/40ToyoProxes '98LS1/4L60E,TRCheaTR cam,Ported TB,Billet MAF ends,MSD8.5 superconductor wires,S&P midlengths,!EGR,!cats,2 1/2" true duals w/X-pipe,Dynomax Ultraflows,TCI 3000,billet servo,TCI deep aluminum pan,3.73's w/Auburn posi; Eclipse CD, Rockford 6 1/2's, Memphis 12's, Punch 200 ix, Punch 500x
If you can measure the cam base circle between your stock cam and the 02 cam you will be able to tell if you need a longer pushrod. All the 4.8/5.3/6.0/LS1/LS2/LS6 engines call for the 7.400" rod. Unless your base circle on the cam changes or you get the heads milled dramatically you should still require the 7.400" pushrod.
See my truck data in the "My Garage" section here... http://www.ls1truck.com/forums/my-ga...tml#post191709
The valves in the 02+ LS6 cams are 0.6mm longer to make up for the base circle difference, this is not the case for the other LS based powerhouses, so a pushrod as close to that difference will be needed.
Chris
2009 Silverado, HPTuners, all stock.
If the stem height is .6mm higher you also have to compensate for the 1.7:1 ratio on the rocker arm. The .6mm is about .024" longer at the valve end and .014" at the pushrod end.
See my truck data in the "My Garage" section here... http://www.ls1truck.com/forums/my-ga...tml#post191709
<div class='quotetop'>QUOTE(chrisj6 @ Jan 23 2006, 08:25 PM) [snapback]42007[/snapback]</div>Does anyone know why GM did this?The valves in the 02+ LS6 cams are 0.6mm longer to make up for the base circle difference, this is not the case for the other LS based powerhouses, so a pushrod as close to that difference will be needed.
Chris
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[1/8 mile E.T. - 8.23 @ 82.86 mph w/1.82 60'] '98swb,4/6drop,20"RozziDeeps on 275/40ToyoProxes '98LS1/4L60E,TRCheaTR cam,Ported TB,Billet MAF ends,MSD8.5 superconductor wires,S&P midlengths,!EGR,!cats,2 1/2" true duals w/X-pipe,Dynomax Ultraflows,TCI 3000,billet servo,TCI deep aluminum pan,3.73's w/Auburn posi; Eclipse CD, Rockford 6 1/2's, Memphis 12's, Punch 200 ix, Punch 500x
The .011" difference at the pushrod won't be an issue normally. The LS6 had sodium and hollow filled valves to lighten the weight on the valvetrain for a higher revving engine. The LS6 has a higher redline than the LS1 engine.
See my truck data in the "My Garage" section here... http://www.ls1truck.com/forums/my-ga...tml#post191709
Here's a link to a pushrod length calculator. It's really a cam guide but scroll down to the pushrod section.http://www.ls1tech.com/forums/showthread.php?t=327734
<div class='quotetop'>QUOTE(RedHeartbeat @ Jan 23 2006, 08:45 PM) [snapback]42012[/snapback]</div>So are you saying GM did this to reduce the rotating wieght/mass of the camshaft?The .011" difference at the pushrod won't be an issue normally. The LS6 had sodium and hollow filled valves to lighten the weight on the valvetrain for a higher revving engine. The LS6 has a higher redline than the LS1 engine.
[/b]
[1/8 mile E.T. - 8.23 @ 82.86 mph w/1.82 60'] '98swb,4/6drop,20"RozziDeeps on 275/40ToyoProxes '98LS1/4L60E,TRCheaTR cam,Ported TB,Billet MAF ends,MSD8.5 superconductor wires,S&P midlengths,!EGR,!cats,2 1/2" true duals w/X-pipe,Dynomax Ultraflows,TCI 3000,billet servo,TCI deep aluminum pan,3.73's w/Auburn posi; Eclipse CD, Rockford 6 1/2's, Memphis 12's, Punch 200 ix, Punch 500x
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