Reving the stock bottom end (calling the fast cars)
Evolving Member
Joined: Jul 2005
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From: Dunedin New Zealand
Revs kill the stock motor pretty quick- it is a crap shoot.
It depends on what turbo your running. Those with 35Rs need to go higher to make full use of their power band. If youre running a green/50 trim etc you dont really need to rev pass 7600RPM and that 400-1000rpm less will have your motor last ALOT longer.
I have Springs, retainers, headstuds and rod bolts on stock head/bottom. My rev limit is 7800rpm with a 3076 0.82
Rod bolts arent all that hard to install in-situ. Then all you are waiting for is the rods to snap
It depends on what turbo your running. Those with 35Rs need to go higher to make full use of their power band. If youre running a green/50 trim etc you dont really need to rev pass 7600RPM and that 400-1000rpm less will have your motor last ALOT longer.
I have Springs, retainers, headstuds and rod bolts on stock head/bottom. My rev limit is 7800rpm with a 3076 0.82
Rod bolts arent all that hard to install in-situ. Then all you are waiting for is the rods to snap
Well i have Cossie 272's (the earliest batch for the ix, when they had the trigger wheel issues) Cossie recomends springs and retainers if you rev these cams beyond the stock rev limit. My car doesn't start to make real power till 5k so the extra revs would help me alot. Nick from DTM tuned it, I beleive relatively conservatively because on 93 pump and 100% denatured he left the boost at 26 psi and used the alky as more of a knock supressant as well as adding some timing. it made 428 on a mustang dyno in a 90 degree dyno room. So I guess my question is do you guys think I would be ok to just bump the rev limiter up to 8k ( I have a tactrix cable )
PS * I am using an sc6152RE. It almost identical to a 35r, and actually a slightly larger turbine
)PS * I am using an sc6152RE. It almost identical to a 35r, and actually a slightly larger turbine
Keep something in mind as you think about revving higher. With a larger turbocharger and better Volumetric efficiency at the top end, compared to a stock style turbo, your tensile load on the rotating assembly increases exponentially with rpm, boost and heat. If you are not making much power past 7000 rpm, I would safely tell you that going past 7500 rpm would be a waste and you would be looking for disaster.
If of course you are like some others and look at disaster as a way to upgrade, by all means rev to 8000rpm and spin the wheel of fortune. You may be ok, or ....
Either way if you have any questions feel free to contact me.
Good Luck
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From: hershey pa/williamsport
There are no guarantees in life nor in the evo world. But the closer you remain to the safe side of things the longer you will enjoy your car without having to go deep into the pocket for an engine rebuild. Some are not so lucky and loose a complete longblock from the carnage.
Keep something in mind as you think about revving higher. With a larger turbocharger and better Volumetric efficiency at the top end, compared to a stock style turbo, your tensile load on the rotating assembly increases exponentially with rpm, boost and heat. If you are not making much power past 7000 rpm, I would safely tell you that going past 7500 rpm would be a waste and you would be looking for disaster.
If of course you are like some others and look at disaster as a way to upgrade, by all means rev to 8000rpm and spin the wheel of fortune. You may be ok, or ....
Either way if you have any questions feel free to contact me.
Good Luck
Keep something in mind as you think about revving higher. With a larger turbocharger and better Volumetric efficiency at the top end, compared to a stock style turbo, your tensile load on the rotating assembly increases exponentially with rpm, boost and heat. If you are not making much power past 7000 rpm, I would safely tell you that going past 7500 rpm would be a waste and you would be looking for disaster.
If of course you are like some others and look at disaster as a way to upgrade, by all means rev to 8000rpm and spin the wheel of fortune. You may be ok, or ....
Either way if you have any questions feel free to contact me.
Good Luck
Hey Nick Thanks for the reply. I agree with you on the gaurentees haha, I was supposed to have the engine out out by now, but unfortunately i didn't get to schedule my machinging class for this semester so its gonna have to wait till closer to christmas. I will Just wait till everything is ready to handle that kind of power.
Yes it went! lol. I dont think the valvetrain is anything to worry about with the stock rod bolts. I think the rod bolts are the week part. About 8500 is as far as I would take it. Ours has been higher though (around 9k several times and to about 10k once on accident)
-Em
-Em
Mine is set at 8000, stock turbo, GSC S1 cams, stock engine. These cams are great for my setup, the car still has power above 7000, and I hit the traps at 7900 in fourth gear, so I def. need the 8k limitation (mine is 6-speed EDM GSR Evo9).
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