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About To Drop In New Turbo And Fuel Pump

lukeybaby
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Kwyjibo Rising Star

Kwyjibo

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Yeah not a good idea. I have just put a HKS 2530 in, I had heard from people that at standard boost levels it should be fine but its not true. I took mine out for a test for leaks/spark misfire but it was already leaning out massively by 10psi and going into R&R. Once you have injectors/AFM will probably be ok to drive to tuners if you keep it at low revs off boost and its not far.

lukeybaby Enthusiast

lukeybaby

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Yeah not a good idea. I have just put a HKS 2530 in, I had heard from people that at standard boost levels it should be fine but its not true. I took mine out for a test for leaks/spark misfire but it was already leaning out massively by 10psi and going into R&R. Once you have injectors/AFM will probably be ok to drive to tuners if you keep it at low revs off boost and its not far.

do u have a aftermarket fuel pump tho? and what is R&R?

Kwyjibo Rising Star

Kwyjibo

Posted
Posted (edited)

R&R is rich & retard. As I understand it once the ECU detects a condition that is very lean it puts itself in a mode that ups the richness of the mixture and retards ignition timing back to a point so it does not damage the engine.

I do not have an aftermarket fuel pump but my injector duty was very high as well so not sure if it is the fuel pump or injectors that were limiting factor. I wouldn't risk taking it for more than a test drive, if you can at least lower the boost to its minimum. The 2530 delivers quite a bit more air than the standard unit.

Edited by Kwyjibo
Beer Baron Grand Master

Beer Baron

Posted
Posted

fuel pump wont really help. the standard injectors and pump are pretty evenly matched. ie the injectors can't outflow the pump. UNLESS the pump is failing and not flowing it's rated capacity.

just fit the turbo, then get it tuned straight way. best way to go. :P

JonnoHR31 Grand Master

JonnoHR31

Posted
Posted
Yeah not a good idea. I have just put a HKS 2530 in, I had heard from people that at standard boost levels it should be fine but its not true. I took mine out for a test for leaks/spark misfire but it was already leaning out massively by 10psi and going into R&R. Once you have injectors/AFM will probably be ok to drive to tuners if you keep it at low revs off boost and its not far.

what makes you say it was leaning out? with the stock ecu the only way to lean it out (as long as all sensors etc are working properly) is to max the injectors, once you start flowing more air than standard the ecu starts adding more fuel, to the point where afr's are around 10.5:1, hardly lean

if your worried about it being unsafe, fit the turbo and leave the gate open so you have no boost until it gets tuned

Kwyjibo Rising Star

Kwyjibo

Posted
Posted
what makes you say it was leaning out? with the stock ecu the only way to lean it out (as long as all sensors etc are working properly) is to max the injectors, once you start flowing more air than standard the ecu starts adding more fuel, to the point where afr's are around 10.5:1, hardly lean

if your worried about it being unsafe, fit the turbo and leave the gate open so you have no boost until it gets tuned

Injectors were on very high duty and the standard non-wideband o2 sensor was pretty much stuck to lean under any sort of load above about 7psi. It also started misfiring badly by 10psi boost. You may be right about it not running lean but either way I'd prefer to be safe than sorry.

If you have any other ideas why it would be misfiring that would be great, I know coils occasionally have problems but mine was running 1 bar on standard turbo with no problems previously. I got flamed on here about how I'm going to kill my engine last time I asked on here whether there is a way to tell if misfire is caused by lack of spark or something else even after telling people it was just a test and that I know it will run crap until it gets tuned(hence why its off the road and only out occasionally for testing).

bozodos Grand Master

bozodos

Posted
Posted

A mate had a 2530 on a HR-31 redtop with better wiring to fuel pump, and no other mods apart from the usual cooler, EBC and exhaust and ran 1 bar for umm about 8 months before it went pear shaped and when the motor was stripped down was found to be a scored bore :ermm:

Before he fixed his fuel pump wiring up it ran like a dog though. IMO I'd still do the supporting mods for peace of mind.

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