Hey guys, just a couple of question for you high-revving guys out there.
I have a 2.0 with Ross pistons/Crower rods with ARP rod bolts, stock crank.
Just bought a Cosworth race head with Tomei 280s hydraulic cams, HKS cam gears.
The turbo is the GT37R from AMS.

First question is this...what kinda rpm do I need to pull to utilise this turbo's powerband with my motor and cams?
Say for example that rpm is 9K. What again do I need to pull the 9K/9.5K?
I bought a Power Enterprise timing belt.
What about the oil/water pumps or the other belts etc.
Remember I want to make this rpm as reliable as possible.
If there is anything else I need please let me know and where I can get it.
Thanks guys.

 

You have a built bottom end and cosworth head.... you can easily pull 9,500 rpm??
What are you asking what do you need to pull 9/9.5 ??? A built motor/head like you have with 280 cams?

 

double valvesprings and titanium retainers

 

+fluidampr

 

have you done the balance shaft removal kit?

 

you need the balance shaft out before you can rev till 9k?

 

Looks like you need to do a little home work..First thing I would check is the power band of those cams and use that to set redline, valve springs are also critical...reving to 9k-9500k is not condusive to a "reliable" long lasting 100k motor...A track car maybe with limited life and anticpated rebuild yes.

 

The guy said he has the cosworth head.This head already has Ferrea dual valve springs and everything that is needed to reach that rpm.
For that kind of rpm I would use ARP 625+ rod bolts or something similar to them rather than the ARP 2000.
You also have to know that while the stock crank can hold lots of power,if using it continuously over 9k there is production of harmonics due to flexing and there is a danger of small cracks.This isn't so evedent on a drag car that sees limited working hours but for a car that is on the street frequently its very dangerous.I personally switched from stock to a K1 crank just to be sure.I noticed that after the installation of the crank the motor has zero vibration.
Finally I left the most important for the end.Find a place to have the parts balanced perfectly!Many shops state that they perform correct balancing but very few of them say the truth.An unbalanced reciprocating assembly is the worst enemy of the motor at that kind of revs.I personally have a very bad experience with that matter by wearing out main bearings and having lots of vibration in the car.

 

buy a honda?

 

I have several data logs pushing over 9500 rpms.
I have balance shaft removal, built head, dual vs and retainers, +1mm valves ported head, cosi m2 cams and a built bottom end. reved it out a lot to.

 

A streetbike.

 

The question no one has asked yet is how long do you intend to run it at 9500 for? Is this going to be as a drag car for 10 seconds or an open road race car for 10 minutes or even a circuit car intermittently for 2 hours?

 

hey guys, thanks for all the replies.
to answer a few questions, i have the balance shaft removal kit, the car will see that rpm ONLY in drag races.
peteypab...that sounds good. give me a lil more info please....how much kilos did u put on that head, how often did u rev it that high?
gt42r, very informative post...thanks a lot. Where sells the arp 625 rod bolts?
The K1 crank is really expensive....wow...ur engine must be a monster.info?
So the oil and water pumps and other belts etc are fine for this rpm?

 

We use all factory belts, oil pump stuff at this RPM in our racecars, but we use electric waterpumps to free up power. I would assume that the waterpump will still be good (just consume some hp is all).

 

ok good...thanks a million johnbradley
appreciate the help.