I was wondering a few things to decide what RPM I should cut off my engine but was wondering on the condition of the engine. I know power will drop off as I'm using stock cams but I've got other reasons for wanting to raise the redline.

Please state:
Person or company that did the head work-
Stock springs, different, duals-
Metal type of the valve-
Cams-
Pistons-
RPM the car see's-
Miles driven with it-
Have your torn down your block to check wear if your RPM is raised?-

Your info is greatly appreciated!

 

9.5krpm cut off , you know my specs
I'll prob bring this back to 8.5 or 9krpm with the turbo.

BTW what is your turbo efficency range? Can you live with all of that turbo lag if you rev more than 9krpm? Just my 2 bobs

 

its not really worth it to do headwork to your head... there are MUCH better places to spend money on that car, and headwork is definately not one of them

 

I'm gonna just try and max out the turbo. It's suppose to stop spinning once it flows enough for 600whp. I'd rather have lag than that annoying whine any day of the year. I also doubt the lag will be that bad at high RPM. I know my cams wont make any more power after around 9000 but I just wanna see how fast this car can go before it turns into an unstable flipping ball of flames.

That lag between shifts really isn't that bad. It's pretty noticable on the journal bearing turbo's but not as bad with the ball bearing.

I wanna see if maybe I could push my engine to 9700 or so.

 

Geoff, I was really looking forward to seeing your intake manifold in action. I talk to Chris frequently and it seems very promising. I originally and still do wanna throw money into a intake manifold instead but at the time I didnt know anyone capable. Now I've got different ideas with my car so I'm not totally sure what to do. Probably gonna end up making a intake manifold you'll end up disliking because of the inability to tune the frequency with it

BTW, the flow increase on the head is well....disappointing compared to the money spent to do it. But heck, clever marketing gets the best of us one way or another.

 

Person or company that did the head work: Alaniz
Stock springs, different, duals: Factory yellows all around.
Metal type of the valve: Stainless (Manley)
Cams: Factory
Pistons: Factory
RPM the car see's: 9500 rpm is redline. HP stops at 9300 rpm and torque stops at 8750 rpm.
Miles driven with it: 5000+.
Have your torn down your block to check wear if your RPM is raised? No.

 

IMHO you should be fine
Personally I would rather a turbo that kick in earlier and runs ouf of breath at 8.5-9krpm and produces enough boost for my greed

BTW what methods are you going to use to enhance your ignition? Sorry for going off topic, I can start a new thread if you wish.

 

Since the head on the car is so efficient should anything be done to it for boost applications? ie Titanium retainers, bronze valve guides etc.

So is a competition port and polish really worth it?

 

Quite simply yes. I'm running a head ported and polished with oversized valves and I'm sure it is responsible for 40 hp or so. The exhaust (where the bottleneck is) was opened up 17 percent.

The valve and valve train is 10 percent lighter than stock with oversized valves and titanium retainers. This provides peace of mind while running to 9500 rpm.

Alaniz modified head thread

 

I'm not doing anything for ignition. There are plenty of people out there who've left it alone and I honestly dont see a real problem with the current setup. It could be better, but with my money tied up, it's good enough. Honda didn't put the alternator they did for no reason, the whole engine and system as a whole are very well thought out. Once I start running out of stuff to do then I'll probably get the AEM CDII. I really just wanna avoid any wiring right now and as long as I can because I hate it. I solder, test, and wire enough in classes. I dont need to go do the same on my car.

The serious bottle-neck for this car is the intake manifold. I'm guessing they did it for emissions purposes. That'd be the best place to invest money on other than just opening up the exhaust ports.