Hey peeps.

I have a turbo that I am rebuilding with a hybrid turbo rebuild kit. As far as I can tell that is simply a 360 thrust bearing and better oil seal. I'm not a mechanic but from reading a few threads this seems to be what people refer to as a hybrid turbo.

My question is this..... I also have a 62 trim compressor wheel so I was wondering if I put that on it will it make a difference and what would the turbo be described as. There seems to be nick names for t28's with upgraded bits so I wondered if a hybrid with a 62 trim is something other people have done.

Hi djmobi, the 62 trim would make a decent difference to performance for the turbo. There is some ambiguity around specs but this could loosely be described as a Hybrid S2 if you were referring to the FC Performance dyno table. With supporting modifications you could expect to be above 300bhp where as the standard trim would be circa 260bhp.

Hi. rebuilding a turbo with a 360 deg thrust bearing would just make it an upgraded turbo; capable of handling more boost.

A hybrid turbo is one that combines parts from different turbos to give it customised characteristics. So if you use your 62 trim comp, then it would be a hybrid. BTW, do you have the correct compressor housing to go with the 62-trim comp, or just the comp on it's own?

You probably know this already, but in case you dont: Before you bolt together a new comp and turbine you have to have them dynamically balanced. Back when I used to build hybrid turbos for customers, I used to send the comps and turbines to Turborebuild to get them balanced.

To get the performance out of your new turbo (rebuild or hybrid), you'll have to get the ECU remapped to suit. I can live-map your ECU, so feel free to PM me when you've fitted it.

Hi thanks for the replies. I'm glad to hear the 62 trim turbo would make a difference. As I will need to get the housing machined to fit the new compressor wheel I dont want to do it unless it makes a difference.
KJ, I bought the compressor wheel and rebuild kit from Turbo Rebuilds so I am planning on getting them to balance it.....only thing I'm struggling with is where to get the housing machined or buy an aftermarket housing that will work.

Any pointers would be appreciated

Gunzi, I cant find the FC Performance Dyno Table....is it on here or on their Fleas site?

I also want to get a 0.8 actuator but no idea where to buy one from...Turbo Rebuild and a few other places I have tried dont seem to have them.

I found this Actuator

but not sure if it is the right thing

It's a couple of threads above this one in the Tuning section

http://www.fiatcoupeclub.org/forum/ubbthreads.php?ubb=showflat&Number=1143896#Post1143896

Cheers Nigel....I did find it in the end

Anybody got any advice on the housing machining or the actuator link I added

anyone...........help

I thin kit would be better to buy a 62-trim housing; the stock 20VT comp housing is pretty puny and will restrict airflow.

I just Googled "62 trim compressor" and this came up:
http://www.frsport.com/?target=products&...9T7NhoCMiLw_wcB

I've got a stage 2 hybrid turbo which has an OE 20VT housing with standard T28 exhaust turbine, adapted snail on the compressor side to take a 55trim compressor wheel, mapped to 300BHP with stock SMIC

62 trim is not too big for the stock housing. It's from the same series as the original.

The GT28 series turbos use a TO4B series cover. It would be prudent to check it fits a t28 backplate.

My understanding is that the 50trim that comes with the turbo has a roughly 42mm inducer whilst the 62 trim has a 47mm. As the standard 50 trim compressor wheel is virtually touching the housing surely there is no way the 62 will fit wihtout machine the housing.

The diamter of the wheel is the same and this wheel is designed for the T28 so I dot expect any issues with the backplate.

KJ - will that housing just fit onto the T28?

The 62trim wheel is from the GT28RS *GT2860RS. The original TB28 turbo requires machining to fit this, there is no other way.

will the housing KJ suggested do the job or should I get it machined......if I should get it machined where would you suggest

Any decent turbo shop should be able to reprofile the front cover. That is the accepted way to fit a larger trim wheel. If you buy a random front cover off eBay there is no guarantee it will fit on your backplate.

Also, the profile is specific to a comp wheel. There are many different 62t comp wheels out there.

The housing in the link is for a 60mm inducer comp. You say your 62-trim is 47mm? If so, then unfortunately not

I think the 60mm is the bottom measurement of the wheel. My wheel is 60mm diamter at the bottom like all T28 wheels with a 62 trim so I think the housing will suit the wheel, I was more concerned about whether the housing will fit the back plate as Scuderia said.

I cant get any machining shops to get back to me via their contact us section on the website so I will try and give a few a ring today.