RB20det Speed Limiter and Rev Limiter????

[side waz]

Hey guys what's up.

I just wondered if anyone here encountered these in there motor's and have you found a PROVEN way to remove them and still keep all there gauges working.

The way to remove these stupid things off of a kade is to snip the speed sensor wire coming from the gauge cluster to the ECU. Since the speed sensor wire from the transmission to the gauge cluster is intact, the gauge still works but the ECU does'nt know how fast your going.

Then of course doing this brings on the rev limiter which does'nt allow you to rev past 5000 rpm's in 4th and 5th gear. There's two options here. 1 - Disconnect the 4th & 5th gear transmission sensor's under the car or cut the 4th & 5th gear sensor wires going to the ECU. That removes the limiter and your free to rev as high as you dare.

Would the same apply to the RB20det motor and ECU?

Thanks for the help.

[themadscientist]

HKS and Trust make jumper boxes to defeat both.

[Carl H]

yah, most ppl who do rb swaps dont wire in the speed sensor so the speed cut is disabled.as far as the rev cut, no reason to rev past the factory redline on a stock motor, afaik the rb20 runs out of puff at 6.5k neways due to cams and turbo so revving past 7.5 isnt gonna make any more power.the best way to do this is to rechip the ecu to accomodate a higher redline and an impossible speed.

[Joe]

just to reitterate, there is NO reason to rev higner than your stock rev limit on a stock engine! the engine does not make power that high, you are WELL past your turbo's efficencey range and are only increasing the chance of destroying something internal. its a stupid modification to do. its there for safety and you are trying to remove it? bad idea. you wont go any faster.

and as for the speed limiter, thats your own decision but please for the love of god do not go that fast on public streets. there is no reason. grow up and take it to the track please.

[RB20DETodd]

Hey guys what's up.

I just wondered if anyone here encountered these in there motor's and have you found a PROVEN way to remove them and still keep all there gauges working.

The way to remove these stupid things off of a kade is to snip the speed sensor wire coming from the gauge cluster to the ECU. Since the speed sensor wire from the transmission to the gauge cluster is intact, the gauge still works but the ECU does'nt know how fast your going.

Then of course doing this brings on the rev limiter which does'nt allow you to rev past 5000 rpm's in 4th and 5th gear. There's two options here. 1 - Disconnect the 4th & 5th gear transmission sensor's under the car or cut the 4th & 5th gear sensor wires going to the ECU. That removes the limiter and your free to rev as high as you dare.

Would the same apply to the RB20det motor and ECU?

Thanks for the help.

speedlimiter:

http://www.rb20det.com/speedlimiter.html

Revlimiter cut:

no no and no

[side waz]

themadscientist - Hey thanks man, would you happen to have any links to these?

Carl H - Oh I'm not looking to go past red line or think I'd make power that high in the rpm band. With my 240 I just hated being stuck at 5000rpm's on the highway when some stupid honda continues going. I figured the stock turbo would'nt go much past 6K rpm's and of course, it's gona be out of the island.

Kamin - Well I'm older then you probabley think and I don't do anything on the street. Empty parking lots, quiet back roads and yes the track is where I play. Sure I did the street racing thing, like I'm sure most of us have at one time, but that's out for me now. Did it enough, to much rice and heat sorta soured the whole thing. I appreciate the caution though and it's for sure good advice to anyone just wanting to go fast and really not know what they are getting in to. With my experience though I hate having the ecu dictate how fast I go or how high I rev. I don't even look at my tach really as once I've learned to hear what the car is saying through the engine sound, steering wheel, shifter and accelerator I know when to shift.

RB20DETodd - Yeah I read that already but then apparently the ECU locks in to a HICAS diagnostic loop. I'm getting an R32 soon thats why I'm asking these questions to those of you who have an RB20det to see if there's anything the same with the way it runs in the two cars. This hicas thing though is a whole different story which I don't think applys here.

Thanks guys for all this. Hopefully I'll be able to figure it all out. If anyone else knows anything though please post up.

[matt_calgary]

Yeah I even had this problem on the dyno. I had a chip re-tuned and the speedlimiter was at something crazy 500km/h but doubt the factory spec rev limiter was taken off. On the dyno, I could only go to 5800 RPM in 4th gear, PITA because the power curve was still going up and the engine ended the dyno run, this was about 102MPH, I figured I could take it to 110MPH which might be close to 6500 but 5800 when the redline is 7000 is pretty crappy IMO.

[themadscientist]

Yup Speed cut(fun level raiser, on the track of course )http://www.hksusa.com/products/?id=781Fuel Cut Defenser (cut the fuel to limit the vehicle, thanks Nissan! )http://www.hksusa.com/products/?id=683Idling stabilizer(no stalling on decel with open BOV) http://www.hksusa.com/products/?id=2175

[matt_calgary]

Not all of us have liquid cash scientist!!!!!HKS has a recirculation kit for their BOV's don't they?

[Carl H]

Not all of us have liquid cash scientist!!!!!HKS has a recirculation kit for their BOV's don't they?

WHAT?you mean you cant crap rolls of 100's out your arse?i thought every one could do that......best bet is to chip the ecu to delete the limiters instead of spending money on silly black boxes which fool the ecu and can be dangerous to use.

[themadscientist]

Not all of us have liquid cash scientist!!!!!HKS has a recirculation kit for their BOV's don't they?

You assume I do? Man, I'm so poor I can't pay attention, what?I have an open BOV and no nifty jumper box and I do fine. Just giving the info.

[matt_calgary]

WHAT?you mean you cant crap rolls of 100's out your arse?i thought every one could do that......best bet is to chip the ecu to delete the limiters instead of spending money on silly black boxes which fool the ecu and can be dangerous to use.

If I didn't need to sell my car for school here, I would have bought a power FC a long time ago, such a valuable tool! Expensive but worth it if you're in it for long haul.....or in mad scientist's case...spend the cash cuz you got it!!