Detroitmuscle

iTrader: (16)

I am starting to gather parts for the turbo kit I'll be putting on. The entire combination hasn't been decided just yet but I believe I'll be using the stock LS2 shortblock thats currently in my car. It has ARP rod bolts and everything else in factory, it will most likely have 317s and a LS6 or similar cam. With the research that I've done so far I'm think of using a PT 76GTS turbo. The kit I have has a T4 flange which is what I'd like and is a front mount setup using truck manifolds. I have a good deal to learn here but I feel I'm on the right track, just looking for some good advice and hopefully personal experience from so of you with similar setups. This is a street driven car and this turbo seems to be a good balance between quick spooling and it doesn't seem to have nearly as much backpressure as some of the smaller 76mm housings.

Thoughts or opinions?

93formto98T/A

iTrader: (28)

Sounds like a solid build plan. 76 to 82mm T4 turbo would be ideal for your setup. I would go bigger personally as you'll find more boost is never enough down the road.

Detroitmuscle

iTrader: (16)

I'm open to something like a PT88 but that turbo doesn't seem very efficient for its size and I don't want to get a BW or bullseye turbo for shear size and weight. not sure how hard it is to fit something of that size but I can stand the rad up if need be.

93formto98T/A

iTrader: (28)

You should check out MightyMouse's build. I believe he's running a forged ls2 with a 90+mm T4 turbo and has had excellent results.

Detroitmuscle

iTrader: (16)

I was also recommended a Garrett GT76 which is upgradeable up to 91mm, this sounds like the best option yet.

black98ws6ta

iTrader: (77)

The billet/cast 76gts would be a great street turbo with good manners. It will probably make 1000 crank hp or so.

turbo iroc

iTrader: (1)

76gts is a great unit, can't beat it for its size and performance capabilities. I've seen these units push close to 900rwhp and have excellent spooling. I believe they can be upgraded to 78 and even 80mm compressors.

MIGHTYMOUSE

iTrader: (59)

staying auto?

problem with the 76 is it will be hard on pistons with pump gas, lots of boost/tq/cylinder pressure early, and unfortunately it will only show up as wheel spin and your ET's may actually suffer if on a street style radial

the 88 is heavier, slower, but has a much smoother and wider powerband for the larger cubes you have.

if 5.7 l it would be a hard decision.. 76mm with slightly relaxed exhaust wheel maybe for you

Detroitmuscle

iTrader: (16)

Yes it will always be an auto,most likely an 80E at the same time. I see what your saying about it spooling too fast. I intend on running a 28" radial and I know the street won't offer much traction. The 76 FI recommended come with a 1.23 A/R and that's what I'm leaning toward. Either that or an 80-88mm compressor wheel in the same turbo.

Detroitmuscle

iTrader: (16)

also would I be able to fit a turbo of this size in front, I was hoping to not have to hack up the kit I have.

Detroitmuscle

iTrader: (16)

update:
I picked up a PT88 that was gone over by precision. Hopefully the lag isn't terrible.

93formto98T/A

iTrader: (28)

Once you get her tuned and dialed in I think you'll be happy with your decision.

Detroitmuscle

iTrader: (16)

what size wastegate would you deem appropriate for this setup?

93formto98T/A

iTrader: (28)

Tial v-band 44mm (MV-R) wastegate would get the job done

djfury05

iTrader: (30)

update? how much did you pick the PT88 up for?

Detroitmuscle

iTrader: (16)

freshly rebuilt I got it for $900 I didn't think that was too bad at all.

djfury05

iTrader: (30)

ya man good deal.. so whats next?

Detroitmuscle

iTrader: (16)

just collecting parts at the moment and tearing it down this winter. Lots of things changing and I'm not really set on what I want to do with the motor just yet, will probably be stock internal for cost purposes.

Fb0dy0nly

iTrader: (10)

Id say forge the internals and turn the boost up!
haha good luck with the build, keep us posted when you start putting it together on the car.

Detroitmuscle

iTrader: (16)

wouldn't we all problem is the car isn't top priority, we just had our second daughter and are looking to move into a larger house soon so it may be a long term project.