Need Some Help With R32 Rb20det

[Marlboro Reds]

hi guys,

im driving an 89 r32 gtst which is fairly stock with the following mods:

greddy cat back exhaust

k&n air filter

ms air flow meter

stock boost ( tried running the car at 12psi, but didnt feel much difference except for the lag?)

the problem with car is when i floor it, it doesnt really seem to go

the accelerator pedal doesnt seem to be very responsive at all

like it will go and you can slightly feel the boost

but you wont feel the rush as much as say a 180 or a wrx

the car also lacks low end response

i know its a 17 yr old car and heard its very common amongst r32s

but would you guys recommend any mods to fix this?

or could it be a problem with the car itself?

any help would be much appreciated

thanks

[WazR32GTSt]

dump/front pipe

up the boost after this to 12psi

adjustable cam gears - exhaust and inlet

[Fixxxer]

Chuck it on a dyno and see whats going on with the car. As suggested above, get the front pipe+dump done too.

Fixxxer

[B0oStEr]

My r32 was quite laggy when it was stock.

It didn't really improve with a fmic and 3" catback but I got improvement once on full boost.

My car is a manual but my son bought a stock auto r32 and it was much less laggy.

I thought it must be the gearing or torque convertor but when we converted it to manual it was still less laggy.

I think it is because the auto ecu is programmed to run 20 degrees initial advance where the manual is programmed for 15 degrees.

You can't just advance the manual to 20 degrees because you will be running 5 degrees too much advance when you come on boost.

I suppose we should have swapped ecus to find out but I'm building a 2.6L rb25 and running a pfc now.

[WazR32GTSt]

mine is an auto and still laggy

the ECU and timing is not the answer unfortunately...

but both cars can be retarded on the dyno to 25deg BTDC usualy without much problem

[mad082]

i had a problem with my 33 when i put a dual stage boost controller on it. when i changed gears the air between the wastegate and the contoller wasn't realeasing so when i grabbed the next gear the wastegate was still wide open and it wouldn't boost. put my old turbotech controller on and it goes fine. i also have a mate with a turbosmart boost tee that does the same thing.

so a cause of it may be a sticky wastegate, or for the people with boost controllers, it might be the controller.

[r33_racer]

I believe the problem is lack of stroke/bore.

Try a rb30det

I guarentee it will put a smile on your dial! Im smiling

Ok sorry...on a more serious note, rb20dets dont understand the word torque, but they understand revs. They are a very peaky motor, you need to rev the shit outta them to make power or punch. With the sort of mods you have everything seems abit restricted...free up the exhaust, you will find it opens up abit better down low and midrange and try an intercooler that might actually drop the intake charge air temp. If everything else fails...revert to my original suggestion.

Edited July 25, 2006 by r33_racer

[s2k12]

get a gtr lol

nah but put it on a dyno and see what ya get.

[B0oStEr]

It's all relative.

5 degrees more advance will help but an rb20 is always going to be sluggish off boost

The main reason an rb20 is laggier than an sr20 is because it has such a short stroke.

Is your M's afm 100% compatible the the stock ecu?

Maybe a remap would help.

[GTAAAH]

Just a suggestion, get in the passenger seat of it and go for a run. I got so used to mine that i posted in here a while ago trying to figure out what it was. Dyno'd it @ 135kw, which sounded okay, so got my mate to take me for a spin. Scared the crap outta me, feels a helluva lot faster when your not the driver

[Marlboro Reds]

lol first of all thx guys for ur replies

from your replies im looking at:

chucking the car on dyno.

adjustable cam gears - exhaust and inlet

dump/front pipe

turbotech controller

ecu remap

and ask a friend to drive it for me

lack of stroke/bore? is there anyway to improve this without changing the engine?

so should i do all of the above??

man looks like im gota save up for a while...juz paid off my insurance

again thx for the help guys

lol s2k12 i woulda got a gtr but im only on my Ps bro

p.s guys how much kms u guys getting from ur car??

ive noticed my cars got very bad economy

[RedDrifter]

As mentioned earlier stick it on a dyno.

A f'd fuel pump can also cause the lack of power and torque.

[WazR32GTSt]

i get bout 300kms per tank with the automatic (drink more than manual)

that's around town only, and not exactly driving sedately