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Lag Of Doom

David32

By David32,
in Engines & Forced Induction

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David32 Apprentice

David32

Posted
Posted

Hey guys I have an r32 with an rb20det. Ive had it for about 5 months now and has the following mods

rb25 turbo (steel wheeled by Steve murch)

z32 afm 

gtr injectors 

walbro pump 

turbosmart fuel reg 

frount mount

allloy intake pipe 

waste spark setup 

3.5"exhaust 

stainless dump pipe 

38mm tial waste gate 

chipped ecu

A/c removed

Turbosmart boost controller

Its currently running 14psi and full boost doesn't come on till 5500rpm but pulls hard all the way to the redline which is too much lag for my liking. Any ideas on why it is so laggy?

Any help would be appreciated

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David32 Apprentice

David32

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Yeah I got the car like that. Yup im guessing it was chipped for everything by the previous owner.

Yeah got a screamer but yeah the wastegate is opening properly.

I'm not sure if it's been high flowed but my mate has a standard 25det turbo and my exhaust side is different to his so yes maybe?

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hypergear Grand Master

hypergear

Posted
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Check to make sure gate and any where else arn't leaking first.

Rb20det don't have VCT and turbo selection needs to be treated same as a S13 SR20det. So those mediocre high flows that felt just alright on an Rb25det will drive laggy as hell on an Rb20det.

Rb20det high flow profiles are very different to Rb25dets.

Get another dead or alive RB25det turbo, we can high flow it to factory alike response with possibly more power.

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David32 Apprentice

David32

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oh that would be mean. How much would that cost?

oh and found out why it was so laggy.. i replaced my 25det turbo with a 20det turbo and noticed how heavy the wheel was of my steel wheel 25det turbo. it hardly spun compared to my mates standard 25det turbo.

now boost comes on ALOT earlier almost no lagg but i miss the pull of the 25det turbo..

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