50 trim vs. 57 .43/.63 vs. 60-1 .43/.63

[98gst14b]

Hi, I was curious if anyone out there has had any experience with these turbos, I already have a t3 externally gated setup, goals of around 400hp, with plans of it being a weekend track car, but not planning on using race gas. Any thoughts related to top end/spool up sacrifices and streetability? Thanks for your advice.

 

[Steve93Talon]

For pump gas and your power goals, the 50 trim is the best choice on that list although there are far better choices in a T3 frame these days (Borg Warner, Garrett GT).

 

[98gst14b]

would you suggest a 50trim /w .63 ar like this one:

Garrett T3/TO4E 50 trim w/ .63 a/r

COMPRESSOR SPECS:

flow: 46 lbs/min 588cfm

50 TRIM WHEEL

TURBINE SPECS:

.63 A/R HOUSING

STAGE 3 WHEEL

oil lubricated centersection.

supportable of 450whp!

 

[Steve93Talon]

That combo would work, but I'd go with something like this if you're looking for a sub-$1k option:

Borg Warner S256 Non Extended Tip - GVautosport

Matt (spendone) has been running it for awhile, ran mid-low 11s @ 126ish on pump gas with it.

 

[dsm-onster]

Amen! the s256 will spool a little faster and flows more air up top than the 50-trim. For the price, why not get a better turbo. The BW turbos are extremely durable.

Look at holsets, too.

 

[19BLACKGST98]

That combo would work, but I'd go with something like this if you're looking for a sub-$1k option:

Borg Warner S256 Non Extended Tip - GVautosport

Matt (spendone) has been running it for awhile, ran mid-low 11s @ 126ish on pump gas with it.

What does this turbo flow (lbs per min)? I know their $1200 turbo flows 55 lbsm I believe its the S258?

 

[z24frank]

would you suggest a 50trim /w .63 ar like this one:

Garrett T3/TO4E 50 trim w/ .63 a/r

COMPRESSOR SPECS:

flow: 46 lbs/min 588cfm

50 TRIM WHEEL

TURBINE SPECS:

.63 A/R HOUSING

STAGE 3 WHEEL

oil lubricated centersection.


Is this the e-bay turbo?

 

[dsm-onster]

What does this turbo flow (lbs per min)? I know their $1200 turbo flows 55 lbsm I believe its the S258?

The s258 has a 65lb/min compressor map. The s256 has a 60lb/min compressor map. But compressor flow means nothing if you don't know what the turbine wheel flows. There are 2 choices of turbine wheels. And you can get a .70 a/r turbine housing or the .55 a/r bolton housing. For the s258, I recommend the .55 a/r bolton housing with the larger turbine wheel.

For the OP, I suggest the s256 with the smaller turbine wheel and the .70 a/r t3 housing. Or an hx35, with that same BEP t3 housing. Both will spool about the same as the gt30r, but bot have compressor maps showing about 60lb/min vs. 52lb/min that the gt30r/fp3052 map shows. With either turbo, you will need to modify/adapt the o2 housing. So that adds cost. The other option for the hx35 is to run the stock t3-style twinscroll turbine housing. You can get a piece that helps the aerodynamics over the divider at the housing and the housign with an open-header t3 manifold will have enough flow to push to 60lb/min. This will flow well for pumpgas, where you want more flow per psi to get good numbers. This will still require modifying/adapting the o2 housing, but with a custom piece. More work, less money. The s256 can be had for more with less work.

Although the turbos you are looking at can be had for the same price as the above 2, they're 70s tech chargers.

I ran a t31 turbine bolton 60-1. It was terribly laggy for the flow I could get out of it. The compressor flows about the same as an hx35 or s256 compressor, but the turbine was the t3 stage3 (t31). I couldn't manage over 52 lb/min with it, and at boost that was much over what you should be using with pump gas, IMHO. I do feal that it would have been capable of 400whp with pumpgas. But, the 50-trim can nearly flow this much at the same boost. So I felt like I made a big mistake because, I got about 400rpms later spool for about 2lb/min more flow. A .63 a/r t31 50-trim can give you 400whp on pump gas with a good tune. I always recommend water injection to compliment your pumpgas build.

 

[99gst_racer]

FYI: I used to have a .63 A/R T3 50-trim. It spooled 20-22 psi by 4K, and I made 400 WHP with it. I was very happy with it when I had it.

 

[98gst14b]

would you suggest a 50trim /w .63 ar like this one:

Garrett T3/TO4E 50 trim w/ .63 a/r

COMPRESSOR SPECS:

flow: 46 lbs/min 588cfm

50 TRIM WHEEL

TURBINE SPECS:

.63 A/R HOUSING

STAGE 3 WHEEL

oil lubricated centersection.


Is this the e-bay turbo?

No, an authentic garrett turbo from Peak Boost.
UPDATE-I ordered this turbo but am still waiting on it the compressor housings are backordered apparently and wont be recieve it it..and my 850cc injectors until after the holidays