Jump to content
SAU Community

Recommended Posts

hi everyone

i have a r33 wth a rb25-30.

i have a rb20ecu with a nis tune chip. has anyone got there rb25-30 running with a rb20 ecu?

i have upgraded turbo, pistons, injectors, fuel pump, q45 afm, front mount intercooler and full turbo back exhaust.

my mechaic has told me this ecu cant be tuned so we are trying the standard computer next. he has told me to get a apexi power fc if he cant get it to run. because its running too rich.

i have contacted toshi off the forums and he said he can tune the rb20 computer to suit the engine.

has any one had this experiance before??

any help will be much apreciated

thanks

Your mechanic sounds like a bit of a numpty....

I ran my old 25/30 using the standard rb20 loom, sensors and ecu with a nistune. Ran up around 330rwkw fairly easily with the t67.

Just make sure you have the install all sorted out, then take it for a tune. The car wont really run unless it's been calibrated for bigger injectors, bigger afm etc.

Cheers

J.

He told me he can't tune the rb20 computer because I think he dosnt no how. He told me the engine is running too rich because of the bigger injectors.

Toshi said he can come tune it for me on the dyno.

My mechanic said not to drive it aswell because it's running to rich.

I'm running a rb25 loom in mine

It will be beneficial to activate the vct too... I used an msd rpm window switch to activate the vct solenoid, only a couple hundred bucks all up. get the car towed to the dyno with a fresh set of plugs, fresh oil change- filter etc. It's not going to run untill it's tuned for the larger injectors and larger afm.

Another thing to look at before you hit the dyno is the power feed to the coil pack loom. I'd run a larger positive wire to the loom through a 30/40 amp relay. Clean your coil pack boots, run a larger earth cable from the earth point at the ign pack/head to the chassis and run a .8 gap (I've always used bpr7es ngk plugs). This will give your ign system the best chance of holding high boost/combustion pressures.

Cheers

Justin

It will be beneficial to activate the vct too... I used an msd rpm window switch to activate the vct solenoid, only a couple hundred bucks all up. get the car towed to the dyno with a fresh set of plugs, fresh oil change- filter etc. It's not going to run untill it's tuned for the larger injectors and larger afm.

Another thing to look at before you hit the dyno is the power feed to the coil pack loom. I'd run a larger positive wire to the loom through a 30/40 amp relay. Clean your coil pack boots, run a larger earth cable from the earth point at the ign pack/head to the chassis and run a .8 gap (I've always used bpr7es ngk plugs). This will give your ign system the best chance of holding high boost/combustion pressures.

Cheers

Justin

can i ask where you got your MSD window switch from? are they easy to wire in and setup?

I got mine from JEGS from memory. If you can wire up an aftermarket headunit, you can wire this in. Just remember the vct solinoid is a negative switch.

You can buy the plug for the vct solinoid from any automotive electrical supplier or fuel injection place.

Cheers

Justin

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now


  • Similar Content

  • Latest Posts

    • I've heard the Tomei USA head gaskets are decent if you want to o-ring the heads but otherwise not recommended.
    • The 296mm rotors are the R33 turbo brakes. The 310mm rotors are the R34 turbo brakes. The calipers are nearly the same, but not. They're the same caliper but the R34 caliper has longer legs so that it sits out far enough to go over the rotor. The pads are the same for both. When you say, "I bough tsome EBC"....did you just mean pads? Or rotors? 310mm rotors fit under 17" wheels. There may be some wheels without enough clearance though. I can't fit my fingers between the barrel of my wheel and the "corners" of my R34 calipers, but there is plenty of room behind the spokes. This is on Enkei RPF1. You can fit 324mm rotors inside a 17" wheel, but I'd be willing to bet that it would be close to impossible with the Nissan/Sumitomo caliper (using an adapter, of course), because the Sumitomo caliper is fatter than the Brembo caliper that is supposed to go on the 324mm rotors.
    • Hi. Can someone tell me what brakes(and mainly WHERE) can i buy brakes on R34 GTT? I bought some EBC which SHOULD go on my car(i have GT but it has GTT brakes) but it does not fit, Brakes are "too" small(296mm) Are 310mm be good or? I have 17 inch wheel so no "big boys" but for me driving i just need one that fits and i can get here in EU/Czech.
    • Since winter isn't that harsh anymore in Poland, i will definetely drive it 365 days a year 😉. But if the snow hits i will try it for sure and let U know. Only swap i am planning to do is of course R34 GTR front 😍.
    • Hey. Very valuable information about pitwork, I will pay attention when buying any consumable parts 🙏 As for the carpets - I got a handful of information from nengun, from which it appears that indeed the carpets for the driver's side are OEM. They are not able to show me any pictures due to the long chain of different sales entities but after I place the order, as soon as the goods arrive at the nengun warehouse from which they will send the shipment to me they can send me photos and if my purchase differs from OEM I can immediately return it / cancel the purchase. I think I will give it a try 😉. Of course i'll let you know what's what as soon as i get them P.s. I know the topic is not relevant to the thread, but both nengun and amayama have these SICK 😍 trunk room lamps available. Do you know anyone who ordered them? I need to have one in my car
×
×
  • Create New...