difference between stage 1 and stage 3 turbine wheel
 

I know that stage 3 turbine wheel is bigger and it has differnt trim than stage 1 wheel and it should be able to flow more exhaust gases but the reason I am asking this is because on blaast berformance's page it is stated that Garrett T3/T04E 60 trim - with stage 1 wheel can support 200-475 HP and the same turbo with stage 3 wheel 200-450 HP. Shouldn't be the different way?
here is the link: http://www.blaastperformance.com/ind...=turbochargers

Re: difference between stage 1 and stage 3 turbine wheel
 

sound weird to me.. maybe spool?

Re: difference between stage 1 and stage 3 turbine wheel
 

yes i believe that would be a difference in spool time. stage1 early, stage3 late.....let blaast chime in on this to make sure

Re: difference between stage 1 and stage 3 turbine wheel
 

If i remember correctly, stage three supports more horsepower spools a little later and boost comes in more graudually

Re: difference between stage 1 and stage 3 turbine wheel
 

Yes, larger turbine impellers will flow more exhaust than smaller ones....and of course spool up slower (more gradually) but you can still make them spool OK with Lower A/R's.
i don't have much experience in using unusually large turbine wheels because people rarely opt for this more expensive turbo choice. But i still made a few attemps and got only positive results.

i recently installed on a V6 maxima a P trim 0.48 a/r and the results are impressive!! (oh well, clutch is gone!)

i personnally used last summer a P trim 0.58 a/r turbine on a forged h22. Very special behavior. Not your everydays stage 3, 0.63ar !!..
boost came in early but gradually. No violent power surge.. felt just like a big V8!! pushed very strong to top end even at 20 psi! >:D

Re: difference between stage 1 and stage 3 turbine wheel
 

To blaast:
I am interested in one of your turbos... It is Garrett T3/T04E 50 trim with stage 1 wheel and 0.63/0.50 A/Rs. I see that it can suport up to 450 HP and that is what I need. I plan to use it as on every day car so it will be driven on lower boosts for normal drive and on max boost on weekend drag races. I am interested will it be able to swallow 100 hp of nitrous on top of 450 hp thru stage 1 wheel? The main reason why I am not considering stage 3 wheel is budget :-\...

Re: difference between stage 1 and stage 3 turbine wheel
 

Yeah while the t04e 50 trim CAN support as much as 450 HP MAx, it's a compressor that is mostly efficient from 160 to 400 HP. If you want 450+ HP for sure, get a bigger compressor.

also stage one 0.63a/r will make it spool nice but 400+ HP is asking a lot to a stage 1 wheel IMO.

If I was you, I would get a stage 3 t04e 57 or t04b H trim or a BORG RHB62 and if you are on a budget, ditch that nitrous instead.

Re: difference between stage 1 and stage 3 turbine wheel
 

This borgwarner rhb62 sounds intresting...At what rpm would I have spool on 2.0 16v engine with it, and what would be max power on 7500 rpm? Do you have some maps of that turbo?

Re: difference between stage 1 and stage 3 turbine wheel
 

the borg spools ok on most engines with at least 150 hp (atmospheric)

it's super efficient from 200 to 400 HP and can be pushed to 500hp.

I have no flow chart. borgwarner don'T disclose this info like garrett do.