Changing Rev limiter

[NosNsx]

How can I change my rev limmiter to 9,000?

 

[BadCarma]

by chipping your ecu with one that has no limiter or is set to 9000 rpm.. seen it.or buying an after market fuel management system like the e-manage (piggybacks) your ecu and allows for computer interface to change ecu parameters and also my favorite the aem unit which replaces your ecu and allows for multible fuel, timing.. maps,sees boost,has nitrous setup,knock sensor ect.all custimized thru a computer setup and best thing hooks right to your existing ecu wiring.no splicing into existing wire harness like with e-manage.
david
ps chipping costs the least,just checkout the various after market chips and see which fits your need and budget best (beware bogus mugen chips on ebay)!thats pretty much it.

 

[NosNsx]

I've checked with different chips but nothing, I'll I wanna do is change the rev limiter nothing else no timmingn no fuel curves nothing.

 

[Lud]

You need a new chip or you need a custom programmed chip if you can't find a pre-made one (though they do exist). The ECU controls fuel cut, so that is what you need to change.

 

[NSXTC]

I don’t want to sound like a party-pooper, but have you ever thought of the rev limiter as a good thing? It’s there to help stop you from hurting your motor. I drove a friend’s race prepped 930 turbo at the track, and his one overriding fear was that I did not over-rev the motor, as he did not have a rev limiter (older engine management system). If more power is what you want, there are much better, safer ways to get it.

If you build your motor for 9,000 RPM, then that’s another story. In the meantime, remember:

Rev limiter = good thing.




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All My NSX'es Live in Texas

 

[NosNsx]

Well Im building a motor and I want to make as much NA power possible on motor and then squeeze it with a 200 or 250 shot of juice. Im hoping to make 350 on motor rwhp.

 

[matteni]

Wow! Increasing the Rev limiter and a MONSTER shot of NOS.

Please provide your VIN number to Lud as he like to keep track of totaled NSXs.

 

[O-Ace]

Well, he did say he was building a motor, and I'm sure it's being built to handle the juice. Don't know why you would think he would total his NSX.

 

[NosNsx]

Lud was that you that dynoed the car with the IEM Package from Comptech. You have the regrounded cams from comptech wright.
did you dyno before the IEM Package and after if so what did you dyno before and after.

 

[BadCarma]

Originally posted by NosNsx:
Well Im building a motor and I want to make as much NA power possible on motor and then squeeze it with a 200 or 250 shot of juice. Im hoping to make 350 on motor rwhp.

sounds totally possible to me.when you indicted you wanted to raise the rev to 9000 I wondered if you were beefing up the motor to handle more spray.what are you doing to it besides pistons? are you sleeving and decking and going with a robust head Gasket?you going direct port?
david

 

[NosNsx]

Well yes the motor was sleeved and also bored 5mm bigger, pistons, ported & polished heads, bigger intake and exhaust valves, a custom head gasket, extrude hone intake manifold, bigger throttle body.

 

[sjs]

Originally posted by NosNsx:
Well yes the motor was sleeved and also bored 5mm bigger, pistons, ported & polished heads, bigger intake and exhaust valves, a custom head gasket, extrude hone intake manifold, bigger throttle body.

What about the valve springs? Stock ones may well float at that RPM, which is a common limitation in high-reving engines. Keep in mind that going too stiff on those will tend to be tough on the entire valve train and seats. The S2000 specs may be worth looking at as one point of reference but of course there are probably many other differences.

 

[NosNsx]

Sorry yes your wright definately harder valve springs, high flow valves and titanium retainers. No sure what to do with the cams yet wanna get them reground any suggestions.

 

[BadCarma]

Originally posted by NosNsx:
Well yes the motor was sleeved and also bored 5mm bigger, pistons, ported & polished heads, bigger intake and exhaust valves, a custom head gasket, extrude hone intake manifold, bigger throttle body.

STOP..I must now attend church to confess my sin of jealousy damn you I hate doing that

just kiddin man after you get her built you need to take a ride up to tampa and go cruising with us.theres about 4 of us that get togther pretty often now or we can take a drive down there.hey nos where did you find a larger throttle body?..been looking myself,guess not hard enough.
David

 

[docjohn]

For nosnsx;The car Lud posted on is mine,and unfortunatley I never dynoed it stock.

 

[NSXTC]

OK, if you are suer your motor is safe at 9,000 RPM, these are the guys to talk to about a custom chip:
http://www.factorxmotorsports.com/

They are the exclusive rights holders of the Hondata chip technology for the NSX. They can burn you an NSX chip to your specifications. Any rev limit you want, as well as custom fuel mapping burned into the chip itself. Please don't go out and buy one of those cheesy one size fits all "performance" chips, as you will likely only be asking for trouble. Get you engine built first, then talk to a real expert - someone who knows what they are doing, because you don't want to skimp on fuel management!

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All My NSX'es Live in Texas

 

[NosNsx]

Thanks finally I can order the chip.

 

[BadCarma]

nos,I agree with nsxtc about getting a quality chip.but as you indicated you did not want to mess with fuel maps and timing.if you want to spray a 250 shot I dont see any way around having two fuel and timing maps or your car is gonna run like crap off the spray and great on it.think about how often you will be driving offthe spray.factor x indicated this to me directly when I inquired about pushing a lot of nitrous.one map for offthe spray one for on.think about how much you will have to retard your timing for that size shot.it will for sure effect normal driving.talk to ken at factor as nsxtc suggested.they really have it down pat IMO.this information is second hand ,it came from factor.tell them what you want and they can custom tailor to your specific needs.
david