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R33 10psi Mod With No Boost Creep Or Spiking!

LatinR33

By LatinR33,
in Engines & Forced Induction

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LatinR33 Experienced

LatinR33

Posted
Posted

Hey all just thought I would share something for people who want 10psi and no boost creep. Just get the wastegate actuator from a R32 and off you go. this is exactly what i have read.

"An option is to install a different wastgate actuator and the good news is the R32 GTST item is exactly the same as the R33 except the spring inside is set for 10psi. R32 actuators can be hard to find but I think it’s the best option for this level of modification as boost spikes and boost creep are eliminated."

You also need to disconnect the 2 stage boost system. You know the one which gives you 5psi at alower rpm range and then 7psi at higher rpms. Cause then you would be going above the 10psi. Not to sure how this is disconnected or whether its safe to do so but I thought I would share this as I thought it was interesting.

Hope this was helpful to someone :)

QRI05E Mentor

QRI05E

Posted
Posted

Personally thats too much screwing around... having to pull off your stock accutator and fitting a second hand R32 one... buy a turbotech off mark for $35 delivered and 10 min install you have any boost level you want with no creep or spike! Talking from personal experiance...

Regards,

Sarkis

siddr20 Grand Master

siddr20

Posted
Posted (edited)

Whats the best way to check for boost creepin or spiking??

Just recently installed a boost t, and set it at 0.7 bar.

Peak on boost guage is always at 0.7 bar..

Also what are the causes for creepin and spiking?

Is this due to hot days or anything??

Please let me know.. Cheers.

Edited by siddr20
QRI05E Mentor

QRI05E

Posted
Posted

Hey Sid, Firstly waste gate creep and boost spike ate two totaly different things...

Waste gate creep is when the boost valve in the accutator slightly opens up while the turbo is building boost resulting in loss of boost pressure... this usually happens when under light throttle.. a device such as the turbotech or any decent ebc prevents this due to blocking boost from reaching the accutator untill the desired pressure is reached... a bleed valve T-piece does not solve the problem.

Secondly, boost spike is the sudden over boost usually caused by an inefficient boost controller or solenoid... most cheap bleed valves cause a boost spike by trapping the boost pressure during gear changes and once on full throttle again the boost may spike 1 or 2 psi... Eg: on a fairly stock R33... if the boost is set 8psi and it spikes to 9 or 10psi it wont be a problem.. But if boost on a stock R33 is set to 11psi and it spikes to 12 or 13psi will activate the fuel cut deffender and will put too much stress on the stock turbo... Again the prevention for this is a good quality boost controlling device..

The stock boost gauge in the R33 dash isn’t sensitive enough to show a 1psi spike therefore an aftermarket boost gauge would be a good investment if fitting any aftermarket boost controller...

Regards,

Sarkis

drewr33 Collaborator

drewr33

Posted
Posted

I just bought one of thoes Ebay boost controllers and they really work well. No boost spiking/creeping.... set at 11psi, just put your foot down >2k rpm and instant full boost. It even workes great at the stock 7psi.

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