Precision 78mm turbo - $600 obo

Putting up my turbo. Looking at going a bit bigger.

So here it is, Precision 78mm (model 78HPSH) turbo, rated to 1160HP. 4" inlet, 3.75" v-band outlet. On my car with ~9.3:1 CR and stock displacement, this turbo was fully spun up by 4300RPM.

http://www.excessiveracing.com/precisionhptechnology78hpsh.aspx

PM for additional information.

Please, keep the comments to a dull roar... mmmk? Thx.

Click to read more...

 

[utryd2]

glws!

 

[Bob Kazamakis]

Wasn't it recently rebuilt also?

 

[Eagle]

Nope, Precision recommended I try running it before sending it in for service. T'was a good call because it ran fine for me all season, just a slight puff after a pull which is pretty normal. There is a sm oil leak between the exhaust housing and the center section, but that would be easily fixed with new seals.... which I would recommend doing at this point.

 

[bikrboy128]

Jesus, going bigger?

 

[Eagle]

 

[Angus]

 

[willizm]

How much bigger do you plan on going?

 

[Eagle]

Only slightly.

 

[willizm]

Only slightly.

oh the humanity!!! Oh the one-upsmanship!!!

 

[Eagle]

That's how I roll.

And if I can't sell this thing right away, I'm going to turn it into a center piece or something.

 

[PANDA]

If this turbo is good for 1000HP+ why upgrade? Wouldn't a bigger one be slower to spool?

 

[Yaj Yak]

a bigger turbo being slower to spool.. is only kinda... so much more affects it... an with that... a bigger turbo will make more power easily. it just makes sense to get a bigger turbo. dont question the eagle.

 

[Eagle]

If this turbo is good for 1000HP+ why upgrade? Wouldn't a bigger one be slower to spool?

No, it won't be.

Pay someone to do the math for you, cuz that's what I am doing.

http://www.smokemup.com/tech/turbo101.php
and
http://www.turbobygarrett.com/turbobygarrett/tech_center/turbo_tech103.html

^^^ Some light reading for you.

 

[PANDA]

PANDA is not good at math, but I will have to take a quick look at that stuff when I get home. I see people on clubgp talking about "this turbo is good for say 600HP" but the car almost always never sees that. Where do they get that number? Wouldn't it be different for whatever car its on? Like this turbo would make 350HP on a honda but 700HP on a V8. Ive always thought that number is when the turbo gets to be inefficient? no?

 

[TUCKIFYOUBUCK]

go big or go home. just piggy back your turbo system with a nitrous shot if your turbo lags to much. I have heard from my dads friend that running a 85mm turbo on a fox body and he piggy backs that shit and that things flys.

 

[Eagle]

Because based on the design, the turbo can push low 30psi. I made 650 at 13psi. If you push it out until it can't potentially offer more boost or volume, then you've found its theoretical limit.

 

[The Broken Regal]

If this was a T3 flange I'd be all over this shit

GLWS

 

[Eagle]

upgrade your flange

 

[OffshoreDrilling]

gt4788!?

 

[Eagle]

I wish

 

[SRT41320]

you should get the new billet turbo!!!

 

[Eagle]

I aint dropping 3k on a turbo Rodger

 

[willizm]

You know, I've never really considered nitrous in my build, but since it is being mentioned what are the precautions to adding that to a turbo build? Not that I'm thinking about doing it, but I do have a stronger bottom end now

 

[32vMonte]

You know, I've never really considered nitrous in my build, but since it is being mentioned what are the precautions to adding that to a turbo build? Not that I'm thinking about doing it, but I do have a stronger bottom end now

I'm gonna use nitrous and meth on my sotck ls1 turbo build. Not alot of nitrous but just for about half of first gear haha.