LS6427

iTrader: (2)

I'm considering Huron Speeds T4 single kit..........PT88.

Goal is 800 RWHP or more.
About 10:1 cr with full time E85
4L80E

Will it go 800 RWHP......?

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rwb

You might want to e mail huron and ask them. They seem to be pretty straight forward with their answers.

LS6427

iTrader: (2)

I did.....just wanted to here some other opinions about T4 with 390 cubes. Or if anyone has used T4 with similar cubes.

Huron mentioned it was too many cubes and too high of compression which will cause too much back pressure. That sucks because I must keep A/C.....and their T6 TT and T6 single kits delete A/C.

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GMCtrk

iTrader: (23)

I think it should work. You can get the S475 or S480 with a 92 or 96mm turbine wheel T4 should do 800 no problem. I'm making 800rw on a 364 with s475 baby 83 mm turbine and about a mile of 4" exhaust tubing.

Kmspeedie

iTrader: (1)

i think your fine, im running hurons v1 a/c kit onna 416ci, i called liljohn and he specd out a compact cover s480 with 96mm wheel and he said it should be good to around 9-1k wheel... which is alotta power considering my setup.. it should be running sometime soon ill post results. on a 390 a pt88 will meet yours goals 100%
i was in the same boat as you, have to keep a/c to be able to enjoy street driving it, the hoes dont like sweatin, or the window down lol

josh4ku

iTrader: (10)

Are you going with the 3" down pipe or bumper exit 4"? The 3 inch down pipe and t4 turbo housing is what limits you to 800.

Forcefed86

iTrader: (4)

Why are you stuck on a 390? You could easily make your power goal on a t4 with a factory 6.0, 5.3, even 4.8.

If your really stuck on a 390... then why stay T4?

That said I'd guess a 1.25 T4 S400 series with the 96mm exh wheel paired to an 80+mm compressor could do it. You should be making 450+whp with a 390 anyway. You wouldn't need much boost to hit 800.

josh4ku

iTrader: (10)

He has to stick with t4 to keep a/c

chuntington101

And we have a winner! Speak to the guys the design, build and run turbos all day and see what they say. Pretty sure they will be able to spec you something.

LS6427

iTrader: (2)

Bumper exit 4" is what Huron said I would need.....

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LS6427

iTrader: (2)

My new fully forged iron 390ci is already in my car.....been driving it for a year now.

I would go T6 for sure....but I need a kit that retains A/C.........

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LS6427

iTrader: (2)

Oh damn, just realized you live in South Florida.......is your V1 kit on the car yet....? I'd like to see it.......maybe get a ride when yours is done.

When do you think it will be done....?

Im in the Middle East right now, I'll be back in Lauderdale around first week of April. Let me know if I can check it out....

Thanks....

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LS6427

iTrader: (2)

The 4" DP bumper exit.......can a cut-out be put on it so I can use a full exhaust when daily driving.......?

Or is it full time coming out the bumper exit....?

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josh4ku

iTrader: (10)

That helps!

josh4ku

iTrader: (10)

That's a good questions. I'm not sure. I just decided to stick with 3".800 wheel is plenty for me.

LS6427

iTrader: (2)

Ok...if I chose to go 3" DP.....can that one use a cut-out to run a full exhaust.....?

Or does the 3" go through a full exhaust...?

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Superman09

iTrader: (65)

390 is definitely on the high side for the T4 set-up, but it can be done and I would only recommend going mid-frame.... too much for a standard T4 with the 3" down pipe. With the mid-frame and the 4" bumper exit down pipe we can probably get away with it and meet your goals, but you won't have a lot of room to grow in the future like you would with the T6 or Twin Kit, however you will have A/C.

You could fab up some exhaust off a cutout on the bumper exit but finding a way to get exhaust to the back will be very tricky from there as you have your A/C compressor and all of the other piping already on the drivers side.

Each kit has a little sacrifice here or there to best meet your goals and keep the kit easy to install while retaining as many features as possible.

T4 A/C kit requires turbo K-member and limits your turbo choices on your engine set-up. Also for your goals requires the bumper exit exhaust.

T6 kit keeps factory K-member, lots of good turbo choices, requires bumper exit exhaust.

Twin kit requires turbo K-member, insane amount of turbo choices, runs exhaust out the back

Superman09

iTrader: (65)

A 3" down pipe will defeat the purpose of going with the larger mid-frame turbo as it will immediately choke it out. For the Mid-frame stuff like the PT88 or a BW, the 4" down pipe is required.

LS6427

iTrader: (2)

Where does the 4" bumper exit type exit the bumper....which side....?

Any pics of this kit installed would be great.....I PMed you my email.

Thanks.

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Superman09

iTrader: (65)

I was typing your PM while responding above, haha. Just sent the PM with lots of good info to your questions and a link to a bunch of pictures! The 4" bumper exit will exit on the passenger side, here is a picture of it on my car.... love the front exit!