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Rb20De+T Help?

james.w

By james.w,
in Engines & Forced Induction

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james.w Apprentice

james.w

Posted
Posted

Hey guys.. Just finished +ting an rb20de. As a de the motor was a good, strong, powerful motor.

I used:

RB20DET Manifold, Wastegate flange welded on.

RB20DET turbo

RB20DET j pipe

FMIC setup

Walbro 500hp Fuel Pump

Fuel Pressure Regulator

RB20DET ECU and Injectors

Adjusted timing all over the show..

Now when it is warm, and I go for it in second it boost and pulls fine, (4 psi spring)

As soon as I dump the clutch and sit on the spot doing a skid it 'farts and pops' around 4.5k - 5k revs.

But then boosting in a straight line it builds boost and pulls fine.

Anyone have any clues? Kinda feel as if its getting to much fuel, anyone know what the fuel pressure should be at at idle?

Tried to do a search, nothing came up.

Cheers

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Rolls Grand Master

Rolls

Posted
Posted (edited)

get new coils, and fix the fuel as well, stock map will being running 9-10:1 at that load if you are running more than stock boost, also plug gap, get it down to 0.8 or lower.

It will be a combination of running too rich and poor spark causing the misfire.

Edited by Rolls
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Dose Pipe Sutututu Grand Master

Dose Pipe Sutututu

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Posted

If it didn't he would have had to change it to make it run.

What do you mean? :huh: Or are you saying it wouldn't run at all so he changed it already.

The AFM wasn't listed as what he used/changed so I am assuming he is using the stock NA one, hence I asked if they're the same or not.

I've had a Z32 plugged into a car with the PowerFC reset and AFM set to default and it still started

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Rolls Grand Master

Rolls

Posted
Posted (edited)

What do you mean? :huh: Or are you saying it wouldn't run at all so he changed it already.

If it was different it wouldn't drive at all or would drive so badly he would have noticed by now. Wouldn't just be a mild misfire, tune would be completely out.

So knowing that I would say it is A) not different, or B) he has already changed it.

Edited by Rolls
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james.w Apprentice

james.w

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Posted

Cheers for the input. FYI all RB AFMS are the same, apart from I think RB25DET which has the purple sticker

Anyway, with the same setup above the problem has fixed itself. Adjusted timing even more, and running a 7psi spring, and adjusted the Fuel Pressure down a little it is flipping quick. feels faster than a genuine 20det. Cheers!

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