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new turbo makes engine cut out

bbenny

By bbenny,
in Engines & Forced Induction

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bbenny Mentor

bbenny

Posted
Posted

Hey im looking for some advice

Last night i installed a HKS2530 with 3" dump on my R32.

The turbo works a treat it pulls so much harder than the standard but i find at around 6,000rpm the engine cuts out completely.

it really freaked me out. I am running the same boost as i was with the std turbo (1bar).

So i decided to remove the bleed valve completely. it doesnt stall as often at high rpm, but i do find the boost tends to creep above the 0.7bar... somtimes almost to 1bar.

*note: i am running a completely std computer.

so i have a few questions:

1: would the cut out be a fuel cut or something else?

2: is boost creep normal? it never happened with the std turbo.

3: even if i run standard boost is it possible for the car to run lean? does more dense air need more fuel?

any advice/info would be great! ...Meggala... anyone?

thanks

Ben.

. . .

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\\\Wiktor Enthusiast

\\\Wiktor

Posted
Posted
Originally posted by bbenny

Hey im looking for some advice  

Last night i installed a HKS2530 with 3" dump on my R32.  

The turbo works a treat it pulls so much harder than the standard but i find at around 6,000rpm the engine cuts out completely.  

it really freaked me out. I am running the same boost as i was with the std turbo (1bar).  

So i decided to remove the bleed valve completely. it doesnt stall as often at high rpm, but i do find the boost tends to creep above the 0.7bar... somtimes almost to 1bar.  

*note: i am running a completely std computer.  

so i have a few questions:  

1: would the cut out be a fuel cut or something else?  

2: is boost creep normal? it never happened with the std turbo.  

3: even if i run standard boost is it possible for the car to run lean? does more dense air need more fuel?  

any advice/info would be great! ...Meggala... anyone?

thanks  

Ben.

. . .

1 yes very probebly your boostcut.

2 check that the wg is working as it should and that no one have screwd on the rod from the aculator.

but sometimes when you wg is too small to regulate the exhaustgases that will accure. easist way to fix in is to place a restricting/small pipe in the exhaust. or exchange the WasteGate

3 yes boost is not really interessting flow say's it all.

so you can tun lean.

Wiktor

Cubes Grand Master

Cubes

Posted
Posted

mine does the same thing when running 16psi until around 30mins after the car has warmed up on a really cold morning.

15psi and it is fine.

BUT... I'm still running the standard turbo but with a larger fmic.

It does freak you out when it boost cuts though as it starts pulling third gear hard then all of a sudden 'NOTHING'... makes you bring boost up slowly thinking youve blown somthing.

It hardly ever does it in second gear.

If you are running the standard dump pipe it will creep boost with a larger turbo as the gases will have trouble exiting out of the wastegate. Its amasing the gas flows out of the wastegate at all actually when you look at the stock setup. It runs straight in to a flat wall a few cm's after the wastegate.

So how is the lag compared to the standard turbo?

bbenny Mentor

bbenny

Posted
  • Author
Posted

well im running an aftermarket dump, so it should flow pretty easy.

but yeah sounds like the same problem as u joel. just cuts out all of a sudden.

lag isnt too bad actually, it can reach 1 bar at about 3700rpm. its noticable that boost doesnt pull as early as stock, but when it does kick in you really know about it. im very impressed with the turbo, just need to sort out this cut problem. maybe upgrade fuel pump too.

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