57 trim t3/4

[glhsken]

57 trim is NOT a good match for our cars.. it's right on the surge line at spool up.

That means it puts out more air at low rpm (while spooling) than the motor can handle. Sounds like a car with no BOV while its accelerating.

I've know a 16V IROC R/t that had WORK done to it and went 110 in the 1/4 had this issue. If a 16v head couldn't handle it, how will 99% of the 8v's.

Thought I would let people know. You want a quicker spooling t3/4, go 46 trim. You want the best power, go 50 trim.

[spoolboy]

It's amazing that Gary did so well with one, isn't it?

I always said that the 57 shouldn't work well and the 50 trim would be ideal. :big grin:

[russ jerome]

So many different result, seams like turbo's intended use and turbine trim choice (stage1,2 or 3 in a .63) is a major factor.
Remember a few years ago when "57 trim is the key", now we are all leaning smaller. I am looking forward to slicks to see how far the little tiny S-60 goes into the 11's (I hope).
As much as I want to mount my 2.4 head this winter I keep thinking about hybrid possibility's in our cars...still dont know what I am doing

[spoolboy]

"Smaller" is relative.

The 50 trim flows more total air and has a bigger OD.

Dimensions:

57
2.230" x 2.950"

50
2.122" x 3.00"

It's just one of those "anomoly" wheels that does everything well.

The way I see it, there are only 2 upgrades that 99% of all people should do.

The basic "Super 60" comp wheel in a machined factory comp housing and stock T-wheel with .63 exhaust housing. Good to about 300whp. This is if you need boost *NOW* but need more HP than the factory turbo can feed.

OR the hybrid TO4E 50trim with a .50AR compressor cover mated to a stage II or III T-wheel in a machined .63AR housing. Good to about 400whp.

If you need more than that, then you need to do some thinking.

[4sfed4]

Quote:

Originally posted by spoolboy [B OR the hybrid TO4E 50trim with a .50AR compressor cover mated to a stage II or III T-wheel in a machined .63AR housing. Good to about 400whp. [/b]

Thats exactly where my TO4E 50 trim / Stage 3 / 0.63 flatlines.....power hits about 390-400 and stays there.

Quote:

If you need more than that, then you need to do some thinking.

And there arent many choices left if you dont want to go with an external gate.

[spoolboy]

Quote:

Originally posted by 4sfed4 And there arent many choices left if you dont want to go with an external gate.

That's what you think "thumbs up

[89daytonaTII]

Quote:

OR the hybrid TO4E 50trim with a .50AR compressor cover

how much of a difference would a .60AR compressor cover make?? just curious cause that's what my car has with a 48trim wheel on the inside. how much different would this be??

[4sfed4]

Quote:

Originally posted by spoolboy That's what you think "thumbs up

Sure there are other choices. But, I am cheap! That rules out lots of things. Ive researched it pretty well.

Ive thought about some non traditional avenues (there are other turbos out there besides Garrett Turbonetics, Precision, etc, ect), but I dont think I want to mess with them.

[oldgregg]

Quote:

Originally posted by glhsken 57 trim is NOT a good match for our cars.. it's right on the surge line at spool up. I've know a 16V IROC R/t that had WORK done to it and went 110 in the 1/4 had this issue. If a 16v head couldn't handle it, how will 99% of the 8v's.

Exactly! I had a 57 trim stage III turbo on my 89 & when it started spooling well the car had reached it's peak RPM.
The car made less HP than with a stock turbo, which is what's back in it!

[Chris Faulk]

I have a 54 trim compressor wheel in my Turbonetics turbo. "thumbs up

[Brian Putman]

Iwas running a 57trim .60ar t4 comp with a stage3 .63ar t3 exhaust on a 2.2 T2 engine. I did notice a little surging problem in the lower revs at part throttle. Floor the throttle and the surging went away. Advancing the ignition timing as much as I could get away with helped. Then I switched to an auto trans(4000rpm converter) and larger intercooler. The turbo kicked butt!! No surging and it spooled excellent! I went from 85 to 86mph(1/8th) on DOT's to 90+mph on the same tires and same engine combo!My ET dropped from a best of 8.92 to 8.22 and that was with just 3 outings on the auto trans. With an auto trans and loose converter one can get away with running a very large turbo and not have problems. I have been tuning my combo for 4000rpm to 6500rpm and it's working great with the 4000rpm converter!

[91_ES]

...where was this info a few days ago.....I just bought a 57trim/.50A.R hybrid yesterday..........

[89daytonaTII]

Quote:

Originally posted by 91_ES ...where was this info a few days ago.....I just bought a 57trim/.50A.R hybrid yesterday..........

I told you in the other thread

[91_ES]

oh yeah u did.......
i was under the impression that this would be suitable.....well will have to see what happens...

[glhsken]

I try to follow my own rules- Not to slam a sale in the thread. I saw your post which said "Your car could handle it"

And decided to post here thinking "surely, anyone looking for a turbo will check this section.

It will work, you better have a 3" exhaust, and know how to tune...