turbocamaro125

iTrader: (3)

Got my buddies 4.8 in the f body tuned up last night. 9.5 psi from a t6 1.10 83mm s472....runs really good for what it is full spool by 3800 with 6 speed. it brake spools 9.5...which is awesome lol....car needs another 255 and 8an feed and a good regulator and a boost controller and it will see 15 to 20 psi. has 80lb injectors and was 90% duty cycle...so it was running out of pressure somewhere lol

Specs:
2008 4.8 55k miles
Ls9 cam
Ls7 lifters
Tsp 7.4 pr
Afr dual springs
243 heads
Ls1 intake
6 speed
3.42 gears stock 10 bolt

denmah

iTrader: (2)

i run a single 044 pump and a -6 feed and im making 640rwhp thru an automatic. with a turbo 4.8

maybe consider dropping a 044 in the tank with a hot wire

Chicago TDP

iTrader: (3)

You are able to foot brake the car to load the turbo with a 6 speed manual T56???
How are you able to do that?

turbocamaro125

iTrader: (3)

YES! 3rd gear 55-60mph hold the gas and brake 2-3 seconds its 9.5 psi and the wastegate starts screaming....I cant wait till he gets a controller and fixes the fuel problem...

Chicago TDP

iTrader: (3)

My mistake....when I hear the term "foot braking" I think of a car at the tree at a drag strip building boost and getting ready to launch.

turbocamaro125

iTrader: (3)

lol no I want him to put a auto in it but right now hes just staying 6sp till he breaks it lol

denmah

iTrader: (2)

thats what i refer to as Brake Boosting from a roll

turbocamaro125

iTrader: (3)

its got a hot wire kit....you think the stock feed and return are a problem too? or just needs a bigger pump?

831jd

iTrader: (3)

Just needs a bigger pump running pump gas?

turbocamaro125

iTrader: (3)

yes pump only last night....car has a meth kit on that we will be running 100% meth very soon...just ordered another pump....the car had 2 walbro 255's in it but I sold the car without the fuel system, the bucket is already for 2 pumps so its just a drop in deal

Hank Peabody

iTrader: (2)

That has to be the quickest spooling manual setup ever. My 6.0 with a T4 PT76 and manual trans isnt to 10psi until about 4100.

turbocamaro125

iTrader: (3)

I couldnt believe it either. I had this hot side kit on a ls1 with a s480 1.32 t6 and it made 9.5psi at 3800...maybe the tune idk...

Hank Peabody

iTrader: (2)

Looking at my logs, I floor it at 2600rpm in top gear (about 70mph), Im only at 5# by 3500rpm.

Im running 28* timing until 3500 then ramp down to 18* by 4500. Im pretty rich arond 11:1 the whole time it is spooling up, any leaner and it seems to spool slower. What kind of timing and AFR are you running while its spooling?

Do you have a line going to the top of your wastegate and boost controller or just run it off the spring and bottom port? Im just on the bottom ports. I wonder if my gates are opening slightly and slowing spool up?

turbocamaro125

iTrader: (3)

yea we started at 2500 in 3rd gear af was 11.5 starting and 12.0 at top end 6700, but having fuel problems...80lb injectors were 90% duty cycle but I am fixing that today. No boost controller yet just spring pressure. car has a Tial 44mm gate referenced from the buttom port goin right to the turbo. timing is 20* afr is 11.5-12.0

your gates could be opening up...what kind? what is your setup?

Hank Peabody

iTrader: (2)

Thanks for the info. My setup is an l92 headed 6.0, ls3 intake, 220/220 114 cam, single PT76. I was running a single tial 44 but would not go under 11psi or so so I added a Precision 39 I had. I might take the 39 off and see how the 44 does by itself again(added the 39 because the 44 is at a bad angle)

turbocamaro125

iTrader: (3)

Well that thing should spool fast *** hell....6sp? T4 76?

turbocamaro125

iTrader: (3)

Lol just saw you said manual and t4 lol well I'd check bov and wastegates for opening and maybe check the tune up again