Is There A Problem?

[niran]

Hey every one.

I was reading through some of the topics on here on the VG30 single turbo and they all state that full boost kicks in at 2800-3200rpm.

However mine kicks in above 3500rpm-4000rpm. The car I have is a R32 with the stock RB20.

the mods i have are:

Front mount intercooler

Pod and CAI

VG30 plastic/ceramic wheel ball bearing turbo

3 inch exhaust

AVCR

Stock R32 ECU

I have uploaded a video so you can see the revs vs boost, it’s in bar, it hits about 0.85 bar. The VG30 also is using the standard rb20 turbo's actuator as everyone said the VG30 actuator is no good, hence the reason why it hits around 0.85 bars.

The link is : http://au.youtube.com/watch?v=TqtF4yWCAkU

i just wanted to know whether this is to laggy for the vg30 or is this ok?

Also what could be the reasons why it is so laggy? is there anything i should check to see whether something is restricting it, i also don’t feel much pull, after taking it to a workshop they said it should pull much more harder on boost.

Thanks every one.

niran

[and3_3]

Its an RB20, smaller size cylinder = less exhaust gas = slower spool.

[heslo]

Yep, that's pretty much it buddy, smaller displacement motor so you have to rev it more to feed the turbo with exhaust gasses... You could always chuck in an RB25

[niran]

Yep, that's pretty much it buddy, smaller displacement motor so you have to rev it more to feed the turbo with exhaust gasses... You could always chuck in an RB25

hey mate, that was my first idea, but then. the info i got where they said full boost was from 2800rpm-3200rpm they where all used in rb20's..

yer but isnt the rb25 a tad smaller then vg30? coz they say the rb25 and vg30 is litrely the same

[NYTSKY]

I cant even hear when the boost comes in

[niran]

I cant even hear when the boost comes in

hey mate, yer the windows where up, yer man im not sure aye my stock rb20 turbo got more wheel spin then the vg30 is at the moment

[niran]

hey guys, some one also said if the CAT has collapsed it can cause boost problems is that true?

[and3_3]

hey mate, that was my first idea, but then. the info i got where they said full boost was from 2800rpm-3200rpm they where all used in rb20's..

yer but isnt the rb25 a tad smaller then vg30? coz they say the rb25 and vg30 is litrely the same

Rb25 smaller than vg30??? Two different things dude.

Yer a collapsed cat converter can cause slower spool up, simple way to check is to take it off! Get your car on a hoist or some jacks and unbolt it (real easy like 4 bolts) If you can't see through it then your in trouble.

Where there other mods involved to get it spooling that fast on a rb20? Like an exhaust cam gear?

[niran]

Rb25 smaller than vg30??? Two different things dude.

Yer a collapsed cat converter can cause slower spool up, simple way to check is to take it off! Get your car on a hoist or some jacks and unbolt it (real easy like 4 bolts) If you can't see through it then your in trouble.

Where there other mods involved to get it spooling that fast on a rb20? Like an exhaust cam gear?

hey man oh really aite my bad.

um yer i will do that today arvo just been spending time with family for new years.

nah there wasnt any cam gear's on them but then agian they had retuned the ecu where mine is just a stock r32, so thats most likley why

thanks for the help niran

[and3_3]

A good electronic boost controller will also help the spool up and the consistency of the boost

[niran]

A good electronic boost controller will also help the spool up and the consistency of the boost

yer i installed An AVCR last weekend, just getting the hang of it now, so ill keep playing around with it and get it all running sweet hopefully..

[femno]

Yeah if you dont have the AVC-R setup correctly you can have low boost in some areas etc.

Play around with Duty a bit and then setup the RPM specific settings (Bar Graph).

[niran]

Yeah if you dont have the AVC-R setup correctly you can have low boost in some areas etc.

Play around with Duty a bit and then setup the RPM specific settings (Bar Graph).

hey mate, thanks for that yer i shall keep trying with the avcr see if any can get the boost to come on any better.

niran

Edited January 3, 2009 by niran