4.8 t6 s472....it's only the beginning....
#1
4.8 t6 s472....it's only the beginning....
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
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
#5
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.
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#10
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
#13
TECH Enthusiast
iTrader: (2)
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?
#14
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?
your gates could be opening up...what kind? what is your setup?
#15
TECH Enthusiast
iTrader: (2)
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?
your gates could be opening up...what kind? what is your setup?