SPRAYED 01

iTrader: (22)

I'm running a tc 78 with a 3 inch dp.makes 670 hp and 705 ftlbs through a stalled auto and 9 inch.its pretty much maxed at 16psi on my 348. Is there anything out now that is physically the same size but can make more power.i think I need another 40hp to hit nines.

HydroStream6

iTrader: (16)

Precision 78GTS might be your best bet.

Josh@KY-Turbo

iTrader: (120)

I have several customers in the High 9's with the TC78 on 346-370ci engines. I wouldnt rule the turbo out just yet.

yelo04goat

iTrader: (11)

what kind of times are you running... details on the motor..?? and some on the car if you dont mind... weight??

i got a tc76 and hoping for mid to lower 10s (porky car)

stevegrizzle

have you checked how much back pressure you have?

CarsandWomen

iTrader: (19)

I was thinking the same thing, seen several other members making more power than that with the TC76 and 370's, hell theres a few running T70's on 370s and doing ok.

cracker

iTrader: (1)

Precision Billet Wheel 76 or 78 HPS

I don't even know if the billet wheel 78 is out yet.

Had really good luck with the 76.

mike13

iTrader: (27)

I don't know how they do it, my TC76 .96a/r had so much back pressure with just heads and cam. The car would just flatten out about 5k.

black98ws6ta

iTrader: (77)

I also think you should be able to go 9's on that turbo, are you just going by dyno numbers? I've had some a couple 680-700 rwhp turbo stalled auto cars trap 145-150. They just dont dyno well sometimes.

PTE 76 is alitte bigger in physical size but will produce quite a bit more hp.

Pro Stock John

iTrader: (34)

Alex' car is pretty heavy, it's full weight plus the turbo kit.

black98ws6ta

iTrader: (77)

I was refering to full weight car's, get the car hooking good and there is no way it shouldnt go 9's at 670 rwhp on a stalled turbo car.

SPRAYED 01

iTrader: (22)

Its your basic forged 348 with 670 ish to the tire.I'm running a tbrake and launching off 9lbs.i went 10.4@133 with a 1.66 60ft.still running stock springs and shocks.I'm going to put a 28 inch tire instead of the 27 I was running with qa1s on it and see what happens.I'm very happy with the turbo but I think another 40hp would make 9s alot easier. Not sure on the back pressure,,3 inch dp with cutout.

HydroStream6

iTrader: (16)

Launching on the tbrake with 9lbs and only cutting a 1.66? Something is definitely not right there...

Pro Stock John

iTrader: (34)

Alex your car is so heavy you should be able to hook a 9.9 pass on a 26 inch tire.

Next time you run, figure out if you are spinning or not leaving on enough power. Maybe you need a bigger spring in the waste gate?

skinnies

iTrader: (33)

686rwhp here at 18lbs on a stock 5.3 with that turbo and the times in my sig. Have you tried turning up the boost, will it just not make anymore?

Johnv

What size intercooler are you running ?

Just went from a 24x12x3" to a 4" core and picked up 3 psi at the manifold
(tc 78 on 383)

DrTurbo

iTrader: (3)

Nothing will drop in that is the same exact size. The 76 and 78GTS are a good bit larger.

IMPATIENT 1

that's impressive! stock 5.3 as in didnt even change cams or jus a stocker with the basic 5.3 upgrades and cam?

Pro Stock John

iTrader: (34)

skinnies are you like < 3000 raceweight... Props btw with the rx7.

code4

iTrader: (30)

I've gone 9.8 on my my full weight fbod with the tc78. It is completely maxed out as far as back pressure. I tried a 50 shot & got some pretty good blow by out of my valve cover vent.

Mine is a .96 AR. I wonder how much it would help going to a larger AR?