engineermike

Granted, I don't have any experience with the PT88, but my smaller T76GTS works very well on 388 cid. I'm going 146 in the quarter at 3700+ lb with my 40 mm wastegate wide open, making 17 psi boost. There's plenty left in my 76, estimating that it's good for just over 150 mph max'd out.

The 88 is quite a bit bigger, so I would think it would support 14-20 more cid.

cablebandit

iTrader: (37)

i have the old garrett 88mm wheel in my s400 with a 1.10 t-6 a/r (most would say thats too small a/r) and it took my 4000# to 144.8 mph in the 1/4 at only 12psi. I think you have a lot more power to be found in your setup. Doesnt mightymouse have that same turbo? Smaller cubes I know but still he maxed at like 23 psi so far

ddnspider

iTrader: (26)

AND?you didnt touch a nerve,you just made a stupid comment.like because hes an M6 his setup purely wont work.No kidding it will go faster with an auto,but guess what,not everyone wants one.And as per your REAL post that you edited, i went 128 blowing off 1/2 with no 2 step on 7 psi @ 3900lbs.

B18CYA

iTrader: (17)

I agree with josh. What heads are you using? I'm guessing even with stock 6.0 heads your see alot of back pressure. The charge pipes do seem a little on the large side. Do you guys think there might be some pressure drop with some much volume??

Frost

iTrader: (45)

Yes, you don't agree with it, therefore it's stupid... Maybe we should all check with you before we post our PERSONAL EXPERIENCES and see if it's ok.

THIS PERSON POSTING wants to go faster and quicker.

BTW, you left out your ET Should be under the 10.50 mark pretty easily with that MPH, right?

Don't be so sensitive.

DrTurbo

iTrader: (3)

4" DP is a must with a PT88. The 3" DP is actually smaller then the turbine exducer....

z28boysteve

iTrader: (9)

I called precision, and they also insist, that the PT88 is just too small and with the fact that im running a 3" DP Im probably hitting pressure ratios of around 3:1... off the turbo's efficiency map totally.

Even if you can make DECENT power with a T4 PT88, it will still have more potential with a bigger turbo. Im going to Step up to a PT91 T6 and a 5" downpipe.... that should make around 1400 horsepower.

By the way I have LS3 heads for those who wonder.

engineermike

Well... the 76GTS is good for high 8's at 150-153 mph. The PT88 is good for mid 8's at 155+. If that's not enough, then more power to ya!

ddnspider

iTrader: (26)

Not exactly.I dont have a problem with anyones opinion......BUT I would expect a Sponsor to have more common sense then to make a blanket statement like you did.and werent/arent you a 6 speed as well?There are stick cars going 9's and faster and he also stated he wanted to make 1000rwhp which would be much tougher with an auto.Saying "that turbo is bad for your trans" is either:
A) obvious, since everybody knows ANY turbo setup will go faster with an auto
or
B) wrong, since a 402 is plenty of cubes to spool a T88.
Im spooling my T76GTS ~2400-2600rpms with a 6 speed.
Dont try to backpedal and act like im the bad guy when you,a Sponsor, made a lousy post.

$ho_tyme

iTrader: (3)

have you ran it un-capped right after the turbo?? I agree with the tubing way to small, granted you can get more outa a 91mm but with under 600hp I dont believe you have even came close to maxxing the 88mm, but you got money toss @ go for it.

frcefed98

iTrader: (16)

nick and frost take it to PM you hosers

engineermike

Found the post... A guy on turbomustangs went 8.59 at 163 mph with the 76GTS. If you can't beat an NA combo with the PT88, it's not the turbo's fault.

ddnspider

iTrader: (26)

yesa master jeremy

Zombie

iTrader: (2)

I think you may be on to something as I've experiened problems with this.

It really kills the exhaust flow and creates high BP if you don't have a smooth transition from the v-band to the 3" exhaust. I picked up a lot of spool and some power when I matched my exhaust size properly.

OP, how much 4" down pipe do you have coming off of the turbo before you go to 3" piping?

sultan(ZR-1)KSA

more boost and C16

ddnspider

iTrader: (26)

hey EngineerMike,how much/did you pick up anything going from a 3" to 3.5" DP off the T76GTS?Ive got the 3" DP going to a 3.5" exhaust.

z28boysteve

iTrader: (9)

Yes well we all know a 76GTS or a PT88 car can go 8s... but a 408... Is too big to use the full potential of the turbo it can work... but a motor like a 370 would have less backpressure than a larger 408, therefore the pressure ratio is more on the turbos efficiency range, instead of its choke point, less heat is introduced into the charge air, and the turbo just functions better...

unfortunately my 3" dp goes all the way to the turbine outlet... clamped directly to it... its probably killing me about 100 hp... and to boot, my water pump on my intercooler had taken a ****, so my intake temps were probably about 200F when I hit 175 F on the dyno I ended up with only 4 degrees of advance and lost 75 horse just because we were hot pulling it and the water got too hot, so yeah I know I can fix my intercooler, remount the heat exchanger away from the radiator, get a bigger downpipe, turn up the boost, use race gas, use my methanol injection blah blah blah.. would probably make 900 rwhp at 20 psi on a dyno.....BUT to me and how much I spent, and the parts I got that were fucked up from pro turbo kits that made me HAVE to downsize turbos etc etc I think that would stilll even suck..

I want to make the most of the motor I have... not bandaid what can be bandaided I've spent 70,000 on parts and im slower than when I was cam only with a 100 shot... I've been wanting to be the world's fastest 6 speed f body, and im so far off its not even funny the PT88 will not get me there no matter what with a 6 speed, once I can take that record, ill go ahead and put a powerglide in the thing.



As you can see I've got ALOT of room for a monster turbo..... why not use it?

I think Im going to settle on an S91 and 1 3/4 headers, with 3" collectors and crossover, a t6 flange and about 14" of 5" downpipe/dumptube. that should do me right. but would those be the right sized headers? and what do I need for charge pipe to make the most of it. Im building the kit myself this time, and if it kicks as, Ill make copies of it for sale.

ddnspider

iTrader: (26)

are you still running the 4.30 gears in your sig?

ggk

iTrader: (1)

if your sick of bandaiding it then why dont you up the down pipe get a new pump for your a2w

install your 2step get it right and then see where you are.

also i dont think those 4.30's are helping your spool the turbo to higher boost .

black98ws6ta

iTrader: (77)

I bet that car was light lol.