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recently had a turbo upgrade and after pulling off the stocker i was plesantly surprised to find what looks like a steel exhaust wheel

(that would explain not breaking after the 12 months @ 15psi i spose)

the compressor side looks relatively normal and has "45V4" on it

the exhaust side looks perfectly normal as well and has "917A" and "21U"

there is also zero shaft play

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The housing numbers are all stock RB25 spec. Sounds like a highflow but trying to find out what cartridge and wheels have been used will be very difficult. Is there a tag on the cartridge? If not, maybe take it to a turbo specialist like GCG and ask them.

Does it really matter though? just add $500 to what you were going to sell it for :D

its now destined for my drift pig... so i spose i'll find out sooner or later...

was just wondering if any of the numbers gave anything away... obviously not :glare:

this could also explain why i thought the 2835 spools as fast as stock ;)

just take off the comp cover and measure the inducer and exducer, that will confirm or deny if its a high flow atleast, could even just be that someone had it rebuilt and had the steel wheel put in there.

  • 1 year later...

look and feel like steel and make a tinging noise if i tap them...

I thought i read somewhere S1 had standard steel..will try get some pics up today

6june016.jpg

6june017.jpg

6june018.jpg

^^

Also noticed this???

Is it a waste of time getting a highflow with 2IU housing or are they ok??

Edited by Arthur T3

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