Ideal Turbo

[Razzer]

Would this turbo work in a 3.8L Camaro? What do you recommend?

http://cgi.ebay.com/ebaymotors/ws/eB...category=33742

[tdz16]

Seems a bit tiny....

[mrbako]

ar is too small, but i don't know what you want...

if you want any top end...get a different one.

[Teufel Hunden]

Way too small for a 3.8L, IMO.

[oil pan 4]

That's a big no on the .48A/R trubine.
The .42A/R compressor good for low flow (might restrict on the high end), the trim is .70 not to bad on the compressor side, just over all small.
The "wet floated bearings" as in not ball bearing.
No waste gate.

[iGoRa]

So, what is recommended A/R for turbine-compressor?
No wastegate=good.

[Teufel Hunden]

.60 compressor is a decent size for our cars. turbine side, most guys go anywhere in the .7 range to the .84 range.

[BirdOfPrey01]

you want .5 to .6 a/r range so you can make lots of torque in the low end. Going with a .8 will be a little too much, remember, our redline is at 6000 rpm, if your not spooling around 3000 rpm you will be very upset when you goto the track.

On the other hand, in high gears on the highway you will have put that larger turbine to use.

But then if decide you want your car for high speed on the interstate, you will have to remove that limiter.

[T-Punk]

to me an ar around .65 is a good overall turbo for our cars. as for no wastegate being good, not really. No internal wastegate just means you need an external which can be better. also look into t3/t4 hybrids and t4's for a better match the t3 just isnt quite what you would want for the 3.8.

[ January 23, 2005, 06:28 PM: Message edited by: T-Punk ]

[iGoRa]

Thats what everybody use : Garrett t3/t4 hybrids?
or should I consider other choises?

[T-Punk]

the t4 is actually a better choice imo but the hybrid will still kick ***. I'm going with a more difficult twin vnt-25 setup which will allow for boost to come online sooner and continue into the upper rpm range without adding much backpressure do to the vnt technology. if you want to get really involved with a twin system i will explain how to do all of this by email.

[iGoRa]

shure, as far as I understand thay are different , small one kicks in earlier and bigger one takes care after.

[T-Punk]

I think you have the vnt's confused with a sequential setup (i'm not smart enought to get a sequential setup built and tuned to work right). A vnt turbo is a variable nosle turbo. What it does is changes the direction of the vanes feeding the air to the turbine and thuse changes the backpressure on the engine at the same time. At low exhaust pressures (low rpms) the vnt acts like a lower ar ratio and it chages as the amount of pressure going throught the exhaust goes up. It is a great use of technology in a turbo setup but you need to know how to run the vacuum lines and such to get it to work (this i now know how to do).

[Razzer]

Would this be a better choice?

http://cgi.ebay.com/ebaymotors/ws/eB...category=33742

[T-Punk]

that ar is too high. you wouldnt spool untill redline if then. look at the info people have given you and base your desicion off of that. there has been some good info thus far.