SR20DET 8000-8500 RPM fuel cut

[Nicksemianiw]

in order to make a SR20DET be abel to rev up to 8000-8500 RPM what do you need? isint it Cams,Cam gears,Valves,Valve Springs, Head gasket and some sort of computer or a rev limiter defrencer? because i hard somwhere the stock bottom end can handdel 8500 rpm but all you need to do is work on the head. I looked on search bars (yahoo,Google) for a while and dident really find the answer just alot of jibberish. So can anyone clairafy this for me? but i also do know the JWT ecu allows the SR20DET to rev to either 8000 RPM or 8500 i dont remember which one and it doesent require much modification they just want bigger injectors and a 300zx TT MAFS swap.

Nick

[DanielIser]

The rev is limited in the ecu. Any tuning shop should be able to remove that and let you rev as high as your heart desires. But its not really that smart to rev any higher than 8k if even that high. Bad things start to happen after redline.

[llamabeta]

Cams, springs, titanium retainers and I recommend getting a lash killer kit as the biggest step. I wouldnt go above 8000 on an SR. Do you actually have a turbo in mind that wont run out of breath at that high of an RPM? There would be a big shift in the power band if you went any higher.

Good luck to you.

[sdtouge]

woul;dnt he want rocker arm stoppers too?

[240SXer]

I do 7700rpm on the stock head with an elampathy ecu

[Nicksemianiw]

So no more then 8k thanks guy

[ItzGenX]

It is the lifters that fail at higher RPM. The solution is to move to solid lifters or a lash killer kit (need solid type cams too). After that, a set of decent springs (don't get hks, they have stock rates) and retainers and it should be set to go upwards of 9k at will as long as the ecu lets it.

[mynismo]

I do 7700rpm on the stock head with an elampathy ecu

en-thal-py

enthalpy

[180fan]

You will need the lash killer kit for sure. Associated with that, solid cams or something spec'd for that kind of duty (Tomei Procams, HKS stage 3, Toda, JUN, etc). Valve springs, and titanium retainers will be needed to obtain the 8k+ redline. Cam sprockets are not needed to obtain the higher redline. If you've done the above modifications, the RAS aren't actually necessary given your rocker arm guides are in good shape and the shims are spec'd properly.

[Silviapower]

You will need the lash killer kit for sure. Associated with that, solid cams or something spec'd for that kind of duty (Tomei Procams, HKS stage 3, Toda, JUN, etc). Valve springs, and titanium retainers will be needed to obtain the 8k+ redline. Cam sprockets are not needed to obtain the higher redline. If you've done the above modifications, the RAS aren't actually necessary given your rocker arm guides are in good shape and the shims are spec'd properly.

I got a question about lash killer kit when i went arround the web searching for answer i can't find any. My question is that will the lash killer kit take out the VTC on S14/15 SR because it require a solid cams? I haven't got any answer to this so can u clarify.

BTW, is the installation of lash killer kit a remove and install process?

[180fan]

The lash has nothing to do with VTC. VTC has the solenoid up front that will move the cam around. If you get the cams built for VTC, it will bit slightly different from the Non-VTC cams. There is a difference in duration of a few degrees if my memory serves me right. If you want to keep your VTC, look for a S14/S15 specific cam. However, I think most of those cams will have VTC dumped if your head is built up that far to require such cams.

The lash killer kit is a remove and install, and alot of checking process. Remove the hydraulic lash adjusters and install the solid ones. Cram back in the cams and start measuring your clearances on the non-bumped part of the cam to the rocker arm with a feeler gauge. This takes a while so if you're an impatient lil' bastard, forget about it. If you're scared about it, get your machinist to check the clearances. However, do check the instructions that come with the different kits. They may differ with the specs they need.

[Nismo_Freak]

I would suggest no more than 8500 RPM for operational RPM.