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M35 Boost - Why Does It Take So Long?

Paramour

By Paramour,
in Four Door Family & Wagoneers

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mxfly Veteran

mxfly

Posted
Posted
That's sux...what am I going to do with the boost controller then!!!...lol.

P.S. How sure are u that it is ceramic turbo? I have my doubts!...will let you know soon though as I am pulling it out to get high flowed and steel impellers(I think). New dump pipe and new high flow cat is also going in.

I've been lead to believe they're ceramics from reading it here somewhere. I know there's a guy who pulled his turbo out, i'll find that post.

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GoldZilla Grand Master

GoldZilla

Posted
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This thread, MX? http://www.skylinesaustralia.com/forums/M3...cs-t192998.html

It's from Stag250, and he states that he believes the turbo IS the same as the RB25 units in s1 and s2 C34's.

mxfly Veteran

mxfly

Posted
Posted
This thread, MX? http://www.skylinesaustralia.com/forums/M3...cs-t192998.html

It's from Stag250, and he states that he believes the turbo IS the same as the RB25 units in s1 and s2 C34's.

Yes that's the one. I was hoping he would mention something about the unit before it got reconditioned.

Jetwreck Grand Master

Jetwreck

Posted
Posted (edited)
This thread, MX? http://www.skylinesaustralia.com/forums/M3...cs-t192998.html

It's from Stag250, and he states that he believes the turbo IS the same as the RB25 units in s1 and s2 C34's.

If it's the same as the RB25 turbo units in the S1 & S2 should I not have bit's of ceramic spitting through the exhaust....hope not...lol :0

Mine's at 1.09bar(15.5psi)....and my turbo is standard(I think!). What were the RB25's good for?

Edited by Jetwreck
Jetwreck Grand Master

Jetwreck

Posted
Posted
it was a ceramic unit and it is now steel correct

Don't know what mine is! Pretty sure it's whatever comes standard. Before you reco's yours STAG250, was it definatly 100% ceramic?

Jetwreck Grand Master

Jetwreck

Posted
Posted
yeah 16psi will well and truely kill a ceramic turb. 12psi is about as high as you can go safe.

and now I know how you were keeping up :cheers:

Then I cannot have the same turbo's as the RB25's....hmmmm...more research needed.

P.S. Been waiting all week for a special letter from the RTA on that keeping up thing.....never came...phew!!!

STAG250 Community Regular

STAG250

Posted
Posted
Don't know what mine is! Pretty sure it's whatever comes standard. Before you reco's yours STAG250, was it definatly 100% ceramic?

well the moving parts were but I confess I didn't see it myself out before it was recon'd but merely repeat what I was told by the recon guy and the mechanic

  • 4 months later...
andy65b Veteran

andy65b

Posted
Posted (edited)

I just fitted a boost gauge to a stock standard ARX and the boost maxed out at 15psi and settles back to 14 psi under full load.

I think we need to find out what our turbo's of made of because if they are the same ceramic turbo as used in the older model stagea with the NEO motor the turbo may not last that long.

The part number for the the turbo fitted to my car is. 14411-AQ800-. Any one know how to find out what sort of turbo this is and what/ how it is built?

Cheers

Andy

Edited by andy65b
iamhe77 Grand Master

iamhe77

Posted
Posted
I just fitted a boost gauge to a stock standard ARX and the boost maxed out at 15psi and settles back to 14 psi under full load.

I think we need to find out what our turbo's of made of because if they are the same ceramic turbo as used in the older model stagea with the NEO motor the turbo may not last that long.

The part number for the the turbo fitted to my car is. 14411-AQ800-. Any one know how to find out what sort of turbo this is and what/ how it is built?

Cheers

Andy

Hey guys. Just got my car back on Friday night from the Shop.

Hi-Flowed turbo... The stock one is DEFINATELY ceramic (I saw the bits).

The receipt I have states that the Hi-Flow turbo uses a Garrett T3 core.

The stock boost for my car was around 7-8psi so I am let to believe. It has been set at 10psi and the boost controller has been disconnected to keep it there until I get my exhaust as I still have a fair amount of restriction there.

As an aside, it makes 140awkw.

I have found that it behaves a bit more like a NA engine now and is much quieter (do you guys find your turbos to be rather loud?).

Interestingly instead of light boost at 2500 rpm & full boost at 3200 until it tapered off at around 5000rpm, it now starts spooling at 2k and is still going strong at 6500!

Cannot wait to get that exhaust.... although I feel a saga comming on....

andy65b Veteran

andy65b

Posted
Posted

not sure what is going on with these boost numbers. Mine is absolutley stock and is definatley hitting 15-14psi. So why are they telling you 8psi?

We definatley need more info on the turbo's!

iamhe77 Grand Master

iamhe77

Posted
Posted
not sure what is going on with these boost numbers. Mine is absolutley stock and is definatley hitting 15-14psi. So why are they telling you 8psi?

We definatley need more info on the turbo's!

The previous shop I took it to put it on the Dyno which showed 8psi stock... although that was the same day as the infamous 0.6psi (not a typo).

The shop that did the hiflow did not dyno it before hand. Makes me think that it would be quite safe running 15psi with steel internals then, no?

andy65b Veteran

andy65b

Posted
Posted
The previous shop I took it to put it on the Dyno which showed 8psi stock... although that was the same day as the infamous 0.6psi (not a typo).

The shop that did the hiflow did not dyno it before hand. Makes me think that it would be quite safe running 15psi with steel internals then, no?

I spoke to Ben at North Shore Prestige Motors today and he said standard boost is 0.8bar (11.6 psi).

I am getting 14psi (0.965bar) at max throttle. (with an absolute peak of 15psi)

He also said the turbo is quite unique and nit eaisly replaced. I ame getting some more details later this week. He did say that the turbo is quite different to the turbo on the older stagea's.

Cheers

Andy

iamhe77 Grand Master

iamhe77

Posted
Posted
I spoke to Ben at North Shore Prestige Motors today and he said standard boost is 0.8bar (11.6 psi).

I am getting 14psi (0.965bar) at max throttle. (with an absolute peak of 15psi)

He also said the turbo is quite unique and nit eaisly replaced. I ame getting some more details later this week. He did say that the turbo is quite different to the turbo on the older stagea's.

Cheers

Andy

It is the housing & flange that is VERY different. The internals are rather similar to the RB25 turbo but certainly not the same.

iamhe77 Grand Master

iamhe77

Posted
Posted
is it a T3 flange??

Just going by what I have been told by a couple of shops that have hi-flowed m35 turbos...

The housing & flange are different (both shops said that they would "not want to break it" as they don't know where they would get another - neither had seen t before) but the T3 internals were used to hi-flow mine.

Take from that what you will.... :)

  • 3 weeks later...
iamhe77 Grand Master

iamhe77

Posted
Posted (edited)
holy shit! thats not really a good sign lol

maybe there are some SS manifolds around that change the flange to T3 or something, easier for upgrades

I don't know what a "normal" turbo outlet is but this is what the vq25det turbo outlet looks like...

post-31842-1217212807_thumb.jpg

post-31842-1217212931_thumb.jpg

Edited by iamhe77

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