scathcart

Its called overkill. There's little point for this on a street engine (I draw the line for streetability around 400 hp. Any more is not usable).



There are plenty of things you could do to make the engine bulletproof... balance the rotating assembling, clutch, flywheel, dowel the engine, have a forged 4340 chromoly 2-piece eccentric shaft custom ground.



Where do you draw the line? Sure it will cool better under extremely high-rpm use under large horsepower values, but how many of us drive like this on the street?



The jets were designed as they were for a reason, and a sound one at that.

Mazderati

You are entitled to this opinion. Who is to say what is too little or too much? What one person thinks is enough might be too little for another and vice versa.





It may be more a matter of the ability to drive like this without worrying about anything moreso than actually driving like this all of the time. Not to mention a daily driven car that is autocrossed or seeing occasional track time.



The modification stands as more than valid in my book. We will agree to disagree. :]

j9fd3s

my opinions

1. rx7 club is a bad source of info, it can be good but for a lot of things you're getting incomplete info/guesses/the party line*



2. sometimes building lots of overkill is good, ie balancing, cleaning etc. sometimes overkill is bad, like ignition timing, theres a happy spot where if you go more you loose power. oil and water temps are the same way, if its too cold its not right. you also have to look at the usage of the car in question,

a street car needs to work on the street, which means its gotta idle and cruise, get decent mileage, etc etc.



i speak for myself here, but i find a large difference between a street car and a race car. while its possible to race a street car and dd a race car its often not the best solution.



the oil jet mods are certainly valid, but when they are valid is important too



mike

*ever try to tell someone over there the atf trick is indeed a trick? or that the split air pipe is mostly decorative?

scathcart

That's cool.

Cheers.

Erdin

on a FD if you do the oil jets mod and shim the front regulator and replace the main regulator with the 115psi one will the car still have a low oil pressur at idle or will that cure the problem if not is there any thing that will.

rotaryfanatik

Funny how you shimmed the front relief to 110 and its stock 156. If you want to put a FD oil pressure regulator on an S4 or S5 all you need to do is take the old one out and put in the FD one. The front relief on an FD is the same as the FCs'....156 psi.

Erdin

so if i keep the front Regulator on the Fd stock and replace the main one with racing beat regulator and do the oil jet mod will i have a low oil pressure at idle, is there any thing that can be done to bring the oil pressure up at idle when you do the jet mod.

BDC

Are you SURE about this? How did the engine act with just the regulator change only? I'd like to see some oil pressure figures at varying RPM's...



B

mazdaspeed7

Where did you get that information? It is wrong, plain and simple, for FC's at least. The front regulator is the same as, or slightly higher than the rear regulator. The FD front regulator would be slightly over 100 PSI, because the rear regulator is set to bypass right around 100-105 PSI. But 156 PSI is WAY too high.

FrestyleFC3S

156 is like blow up engine from massive oil spraying everywhere









and if you have the car apart...who cares...its so easy to do.its a great mod to do while its apart and costs < 10 dollars!