For info on the GT42
http://www.precisionturbo.net/turboc...tegory_id=3023
for info on the GT42 size and dem's
http://www.atpturbo.com/root/turbopi...ns/gt42dim.htm

For the T76GTS
http://www.precisionturbo.net/turboc...tegory_id=3027

 

according to that stuff it says the GT42 is bigger....but yet people say the GTS is bigger and they both support the same hp,what gives

 

dunno?? I still too new to turbos to know much about them...
Maybe a turbo expert will chime in and give us some good info between these two.
J

 

damn... I want that 76GTS but it's a bit more expensive... hrmmm

 

JOSE!where are you! from what i read the GT42 has a much bigger A/R ratio but if you look the specs are also catagorized differently.i dunno

 

it will be worth the upgrade for myself IMHO for my build....i cant see it hurting you either...if you went from a lil T70 couldnt you gain 100hp by going to something like the GTS...and alot more torque?

 

man all this talk,

doesnt seem like either way youd go wrong.

 

yea I could, it's between those two turbos. The only thing prohibiting me from jumping on a 76 is the extra $400... I guess if I'm gonna do it I'm gonna do it right.

 

You have one other choice...... the GT-42 i have........ GT42-76
Its a 76MM turbo...... From what Prescion is saying it will go farther then the T-76GTS..... at least it will with the T-6 flange and a 76mm wheel......

Jer, Im not sure what one you have buddy since the 70mm and the 74mm version can both be had with the same size wheel on the exhaust. Do you have a part number on it??? If ya do you can always call Prescion and ask..... if you havent looked and asked already....
Right buddy

Kyle

 

standard 42's have a comp wheel with either 94mm or 102mm EXDUCER diameter.

trim = Inducer^2/Exducer^2

EX, you have the 102mm (ie big 42 wheel). It's a 53 trim, use the trim as a %/100. so 53 trim = 0.53

0.53 = In^2/(102)^2

That give Inducer = sqrt(.53*102^2) ~= 74mm

If memory serves, the 94mm wheel is a 55 trim. That's about a 70mm inducer.

The GT42-76 is a standard 42 housing that Precision remachines for a 76mm inducer wheel. Not sure on the exducer size and trim, but I bet I can measure Kyle's and find out

 

Ha ha, that info was directly from Ron@precison....all that is listed in my sig for my turbo's specs is what he sent to me in an email. He said you have a GT4202 and its specs are as listed.
No other info was included in the email to is size or power producing capabilities.

Matt, so did all that mean I have a 74mm? Sorry I got a lil confused reading that last part when you mentioned 74mm and 70mm a sentence afterward....I'll get this turbo lingo soon

I just hope it pushes 650 pretty easily, what are the chances of that happening with this turbo PLEASE CHIME IN

 

 

Think about how much you've spent on this bitch already... is $400 THAT much more money? You know you want to do it RIGHT.

 

yea yea... when did your NBM car get clobbered? sorry btw

 

Thursday afternoon on the way down to the dyno. I drunk dude pulled out infront of me and the wife.. killed the TA. I'll find out Monday if they total it or not. The guy didn't have any insurance either

 

what an *******... sorry to hear that. People like that need to be strung up

 

that sucks Gomer.
I got ur extra money right hear Andy!!!!!!

 

OK...here are the differences.

GT42-94 = 70mm with S-trim wheel

GT42-102 = 74mm with S-trim wheel

GT42-76 = 76mm with S-trim wheel

T76GTS= 76mm with S-trim wheel


So, what is the difference, the 76GTS is nothing more then the GT42 exhaust wheel and a 76mm wheel from PTE's parts bin. They slap different compressor and exhaust housings on it for better packaging and smaller overall size. Also the A/R is smaller as well.

 

Jose explain what the difference is between an OC and a tangential AR ratio.

 

"puts on dunce cap"

LEARN ME!