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Rb20det Set Up Advice Needed

tstg23r

By tstg23r,
in Engines & Forced Induction

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tstg23r Enthusiast

tstg23r

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Hey everyone. I need some advice on tuning my skyline. I have an R32 GTST 4 door Automatic. The RB20DET is essentailly standard except for a larger, Chinease HKS copy turbo (sorry i have no idea what kind :thumbsup: ) and a front mount intercooler. The turbo is laggy but pulls hard when it comes on, but starts to ping at or close to redline. I was told it needed a Fuel Cut defender?. Also there is no boost controller so i think i should get atleast a bleed valve. Also i have a set of GTR injectors laying arround which i would be keen to make use of. How would i do this? maybe Z32 AFM, GTR injectors and a ECU remap from the reading i have done?. Your suggestions much appreciated. Cheers. Mark.

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bubba Grand Master

bubba

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You answered your own question, z32 afm, gtr injectors and a remap..

I would also put a decent fuel pump in there if you haven't already, it's quite likely that your fuel pump is dead and can't supply fuel up top.

Another possibility is that with the bigger turbo you're maxxing the afm, if it can't measure anymore air it stops throwing fuel in and hence leans out.

So, forget the FCD, get yourself an 044 pump or similar installed intank then get the z32afm fitted along with the GTR injectors and have it tuned/remapped, you will notice a HUGE difference :(

Oh and if it doesn't have a full 3" exhaust, put one on :P

Edited by bubba
tstg23r Enthusiast

tstg23r

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:(

thanks allot buddy. Fortunately It has a custom 3 inch dump pipe , straight through cat and a HKS super dragger exhaust. I am going to change it to manual soon. So i guess i will get a Manual ECU and get that Remapped and the injectors/AFM put in when i do the conversion. I read in another post that to use the GTR injectors i will need to use a ballast resistor, is this true?. Also would a Mines RB20DET tunes manual ECU suit my needs after a manual conversion?. Many thanks

tstg23r Enthusiast

tstg23r

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thanks for the advice everyone. I have a resistor pack and plug here which is lucky. Also some more questions. What will adding the GTR injectors and Z32 AFM with ECU remap do for the engine exactly. Will it allow me to boost more? and stop pinging at redline? maybe reduce lag? should i run any other devices with this setup. At the moment it seems quite laggy its annoying :thumbsup:. The turbo looks quite large, i will get its specs soon . Any suggestions appreciated. cheers

bubba Grand Master

bubba

Posted
Posted

The GTR injectors and z32 afm and remap will allow you to measure more air and whack in more fuel to match the extra air and the ecu remap by your tuner will allow him to smash timing in down low to make it less laggy and tune it properly for fuel/timing on boost (as opposed to a piggyback which is tricking the ECU). Have you got a new fuel pump in there? If you haven't, get yourself an 044 pump or something similar as if the pump is dying it won't be able to supply the fuel the GTR injectors will be trying to throw in :)

tstg23r Enthusiast

tstg23r

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Posted (edited)
The GTR injectors and z32 afm and remap will allow you to measure more air and whack in more fuel to match the extra air and the ecu remap by your tuner will allow him to smash timing in down low to make it less laggy and tune it properly for fuel/timing on boost (as opposed to a piggyback which is tricking the ECU). Have you got a new fuel pump in there? If you haven't, get yourself an 044 pump or something similar as if the pump is dying it won't be able to supply the fuel the GTR injectors will be trying to throw in :blink:

Thanks for your help in this topic man much appreciated. sounds just what this car needs. I am 80% sure it has an 044 pump . Whats the going rate for a Z32 AFM?.

First on the list though is a manual conversion, then get the manual ecu tuned with the injectors etc.

Here are some specs as it is

1989 R32 Gtst 4 door

RB20DET Automatic

GTR front bar

Carbon fibre bonnet

front mount intercooler

Currently unidentified chinease hks copy turbo on stock manifold

custom dump pipe

HKS super dragger exhaust

pod filter

F & R strut bars

Xhp 17' wheels

Edited by tstg23r

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