stock turbo, worth it to stick on a .63 turbine housing?

[Shadow]

Quote:

Originally Posted by tryingbe Mopar Performance USE to sell 2 turbochargers called the "Turbo Plus unit". It was nothing more then a stock Turbo I or TII turbocharger with a .63 ratio exhaust housing. Claimed hp gains were 6-7% with some loss of torque at lower rpm's. The 84-87 Turbo I part number was P4452780 and the 87-89 Turbo II part number was P4452781. http://www.thedodgegarage.com/turbo_advanced.html

The turbo plus units also came with a slightly larger compressor wheel, 60 trim, I believe.

[DaytonaTurboZ]

Quote:

Originally Posted by saw wave analog its going strong man, stock 86 glht ti bottom with a little over 130k on it.. compression is 140 on the dot on all 4.. i beat the absolute shit out of the car, probably 15 23 psi pulls a day on 93 octane hard shifting hitting the rev limiter just driving it like a turbo omni should be driven and its been going strong for 2 years in 2 different cars the whole time. i am pushing it way past what i would consider safe, but i keep it rich and have never noticed any knock.. it seems to be loving it.. im just going to keep pushing it as far as i can. 11's on mostly junkyard mods a stock ti bottom and stock turbo would be pretty cool

Hell ya.

[devlish]

anyone use 14" drag radials? i got a set from a friend slightly used for the right price, so i'm going to try them out this summer. my original thought was smaller diameter would spin faster, helping me off the line in accellerating... but now i have WAY MORE modifications than i originally planned for, so maybe that will make it worse??

btw, car is an 86 Omni GLHT2, will be at 18psi, decent amount of mods to go along with it.

[saw wave analog]

225/50/15's were good around town and for roll ons but from a dig at the track the ifference between them and regular street tires was not huge.

in an l body ive come to the conclusion that the only reasonable street tires for them are drag radials, and the only way the car isnt going to disappoint at the track is if its on full blown slicks

[turbovanman]

Quote:

Originally Posted by devlish anyone use 14" drag radials? i got a set from a friend slightly used for the right price, so i'm going to try them out this summer. my original thought was smaller diameter would spin faster, helping me off the line in accellerating... but now i have WAY MORE modifications than i originally planned for, so maybe that will make it worse?? btw, car is an 86 Omni GLHT2, will be at 18psi, decent amount of mods to go along with it.

I used them in my van for one summer, best 60ft was 2.1 and that was on a stockish motor with a TIII turbo, it was so easy to blow them away.

[devlish]

that's what i'm thinking... the smaller tires with a light car and good HP is going to just roast them like crazy. owell, they'll still be better than street tires i'd imagine!

[LynX853]

Quote:

Originally Posted by Shadow The turbo plus units also came with a slightly larger compressor wheel, 60 trim, I believe.

turbo plus was only exhaust side .63ar exhaust side

the turbo with both the 60 trim compressor and a .63ar exhaust was the super 60

both units were offered by mopar

[Moparbishi]

i just put a .63 on my 89 shadow with a 2.5. i love it.
only thing i did diffrenent to my car was the 88 tbi cam the .63 exaust and 2 1/2 inch swingvalve and my 1/8th mile time went from 9.6 @ 15 PSI to 9.0 @10 PSI smoking tires.
i love it.

[Shadow]

Quote:

Originally Posted by LynX853 turbo plus was only exhaust side .63ar exhaust side the turbo with both the 60 trim compressor and a .63ar exhaust was the super 60 both units were offered by mopar

The turbo plus came with a 60 trim compressor wheel(larger than stock) not to be confused with the reworked S60 compressor wheel which has a different map and flows about 2-3lb's/min more.

[beyond_audio]

just placed the larger housing on a stock t2 unit but at the same time replaced the stock exhaust manifold with one that was ported by mpgmike.
all i can say is wow... at 8 psi it feels like it has more power than it ever did at 14 before.

[puppet]

Quote:

Originally Posted by Shadow The turbo plus came with a 60 trim compressor wheel(larger than stock) not to be confused with the reworked S60 compressor wheel which has a different map and flows about 2-3lb's/min more.

Actually, it's a 57 trim compressor wheel (vs stock 45 trim ) ... same size as those on the 16v engines.
Do they round the trim sizes up?

[Shadow]

Quote:

Originally Posted by puppet Actually, it's a 57 trim compressor wheel (vs stock 45 trim ) ... same size as those on the 16v engines. Do they round the trim sizes up?

Interesting, I've never heard of a t3 57 trim nor have i seen a map for it. I always thought the 16v's had a 54 trim? The turbo plus came with a larger wheel, of that I'm sure. I have a friend who is an authorized Garrett turbo rebuilder. Back in the day he looked up the build list for a turbo plus and I'm pretty sure he said 60 trim. I also have several T2 comp housings that were machined for that wheel. I'll check and LYK.

[detobias]

Quote:

Originally Posted by beyond_audio just placed the larger housing on a stock t2 unit but at the same time replaced the stock exhaust manifold with one that was ported by mpgmike. all i can say is wow... at 8 psi it feels like it has more power than it ever did at 14 before.

cool !

2.2 or 2.5 ? what size SV, DP, exhaust ?

[Shadow]

Quote:

Originally Posted by Shadow I have a friend who is an authorized Garrett turbo rebuilder. Back in the day he looked up the build list for a turbo plus and I'm pretty sure he said 60 trim. I also have several T2 comp housings that were machined for that wheel. I'll check and LYK.

The turbo plus is indeed a 60 trim wheel, same wheel the ford T3 turbos use. I'm getting the Lotus T III compressor wheel checked out and we'll see if it too is a 60 trim.

[crazymadbastard]

Quote:

Originally Posted by Moparbishi i just put a .63 on my 89 shadow with a 2.5. i love it. only thing i did diffrenent to my car was the 88 tbi cam the .63 exaust and 2 1/2 inch swingvalve and my 1/8th mile time went from 9.6 @ 15 PSI to 9.0 @10 PSI smoking tires. i love it.

Sweet!
Does your car have a custom cal or T2 electronics? Intercooler?