1999TransamWs6

iTrader: (21)

Im looking into putting a precision T-88 turbo with low compression pistons and a good set of rods in my car and was wondering what kind of power I could make? Im looking for around 1000RWHP. Of course a turbo cam and Air to water intercooler along with all supporting components will be used. So basically with AFR 205cc heads and a T-88 turbo on a 346 can 1000RWHP be done and what CR ratio should I aim for? This is not a DD. Thanks

Superman09

iTrader: (65)

Prolly want bigger cubes so that power is more easily obtainable and the 88 is pretty big for a 346 i believe, would be much easier/prolly safer with more cubes.

93formto98T/A

iTrader: (28)

Go 408. With 346 you'll hit full boost at ~5000rpm. MM had a similar setup before he torched it.

Pro Stock John

iTrader: (34)

I'm shooting for 1000rwhp or more with a 346ci and a GT47-88. Cubes would be nice, maybe I'll do a bigger motor some day.

sb427f-car

Jose has a similar setup on an LT1 and they have a customer with an LT1 383, pte-88 put over 1000 down @ The wheels...346 will take a while to spool it, but it will work.

1999TransamWs6

iTrader: (21)

Yea Im going to go big cubes one day too but for now I want to do a 346 to save some money. My plan is to get the best of everything for the turbo set-up and a decent 346 so when i have the money I will do a ***** to the wall warhawk motor

bboyferal

iTrader: (9)

88 for later for sure, though the 76GTS would be better for the 346.

smokinHawk

iTrader: (48)

with 346 cubes youll need to spin your engine to around 7500rpm to make a real good power band to take full advantage of that turbo.
now with something like a 370 you might only have to spin it to 6800
that being said im only planning to spin my PT88 fed, 347 cubed, hyd roller to 7000rpm's as im not sure about spinning a hydrolic roller past 7k.
im planning later to up my cubes to 370-383 and taking the revs down to 6500-6800
not sure ill make 1000rwhp with my 346, but i hope to when i get a larger engine.

coarse on this stuff i havent done any real world testing yet, just read similar maps (as they dont have maps for the PT88) and estimated on what it will be.

MIGHTYMOUSE

iTrader: (59)

how do you guys know hes not talking about a t-4 88mm?

i never had 88mm on my 346, also never blew up my 346 from ARE

366ci the pte88 comes full on around 3700rpm

smokinHawk

iTrader: (48)

full is how much boost?

i thought he was talking about the t4 flanged one, the T6 flanged precision 88 isnt to common.

sb427f-car

I was thinking T4 flanged too and would think it'll work, but like slowhawk said...up there a tad.

MIGHTYMOUSE

iTrader: (59)

how much you want? 15?

if i only ran race gas i'd think 9:1 would be best of both worlds. the 88 can do it.

smokinHawk

iTrader: (48)

just wondering how much you where running, obviously the more boost the little bit longer it takes, so 15psi by 3700 with a 366, thats not to bad.

1999TransamWs6

iTrader: (21)

So the major problem is that the power is going to be at very high rpms? I was going to spin it up to about 7200 or so.

smokinHawk

iTrader: (48)

7200 should work well then.

Pro Stock John

iTrader: (34)

I think I am going to see full boost by 6500. I guess we'll see.

braap

iTrader: (4)

Fixed!

It's hard to say without a compressor map, but I wonder if you'll have surge issues with the PTE88 on a stock cubed motor?...small turbine, small engine, big compressor...hmmm...I guess you'll just have to let us know.

Pro Stock John

iTrader: (34)

It's a Precision GT47-88 T6. Some 306-331ci SBF guys are running low 8's @165-168mph with it so (Turbo Manny in TX?) I"m hopefully mine will run at least 9.00. :0

1999TransamWs6

iTrader: (21)

which housing is better t4 or t6? Im really new to the FI world so to make shure your talking about the exhause housing correct?

braap

iTrader: (4)

Sorry, guess I should have been more clear...that part was directed toward the original poster. With the T6 flanged unit you'll be fine...obviously. I'm just speculating if the PTE88, with a T4 flange and such a large compressor, would experience surge at lower rpm's...MightyMouse seems to be doing just fine, but he has a few more cubes and a good flowing set of heads...I suppose until somebody tests one and provides a compressor map (wasn't Jose going to do that?) it will remain pure speculation.