Check your valve stems...:sercret2:


I'm for vids and graphs!

 

your probably right, i need to do the math before i tell everybody its a 377. thats what i was told it was, and it just sounds so cool.


and this was on a dyno jet, with a pretty conservative tune.. i am going to the track with it friday for the real test.. it definately has traction problems now from a dig.

it hooks decent from a 20-30 punch, only drifts the rear a little... hopefully it hooks decent at the track. thats where i really want to see some good numbers. i am hoping this one will run like the 4.8 on nitrous while .. then after i upgrade this fuel pump, start spraying it.

 

have the tune checked again, but dont pay much attention to dynos... my 6.0 put down 323rwhp and ran damn good.... the track is where the real results are,,, my dyno pulled all the way too 6250rpm and kind of stayed there all the way to rev limiter 7200rpm..i can tell you right now your converter is too small for that cam...

 

i dont know what to think about the numbers... we finally had dry streets yesterday, and with cut out open, i tried it out. it launches WAY harder than the 4.8, shitloads more torque. it was sideways til 45 or so, when i stalled it up. it hooks decent if i roll into the throttle, but from a stall, no sir.

i got a t/a to bite leaving work, and a mustang gt on the way home. chewed up both of them.. t/a was stock though.

weather pending, it will be at the track tonight to see real numbers.. it really does feel as strong or stronger than the 4.8 on nitrous.

 

the intake is choking the hell out of that thing. the truck intakes shouldn't be used for anything more then a cammed 5.3. the cam/head combination your running is being killed by the intake. there are probably other problems in your system, but I can tell you that the intake should be swapped and you will gain alot of power from it.

what does your exhaust setup look like? that will hurt your power just as much as the intake if your running manifolds. your whole engine needs to work togather, from your intake, to your TB, Manifold, heads, cam, headers. having all but one component matched will hold back the potential of everything.

 

intake manifold is all i can think of, i am contemplating a fast 90/90 swap, provided i can ever find a fast intake for a good price. i have Hooker LT headers and a 2.5" exhaust with a big case magnaflow setup, and an e-cutout. my exhaust is restrictive however, thats why i gained 21 rwhp from opening the cutout..

whenever funds allow, i may take on the FAST intake swap.

 

I would put money on you gaining over 30rwhp when you do that swap. do you have a single 2.5 inch or dual? if its a single i would go to a 3 inch to pick up some power. I would check out wieland's new intake, its cheaper then the fast and is supposed to be just as good.

but no **** on the power gain, I know someone who got 27rwhp on a stock ls2 just switching out to a fast 90/90. your setup would profit alot more from the swap, especially since the ls2 manifold flows better then our truck one's and your engine is built up alot more then a stock ls2.

http://www.s10forum.com/forum/f213/d...-today-331610/
check it out

 

there is still no release date on the wiend intake though

i know it would pick up alot, with these heads and cam, this stock truck intake has to be choking it..

my exhaust is dual 2.5", and i used a y pipe like an xpipe, with a single e cutout on it... i run it open most of the time, unless i have my little boy in the truck. i wont redo the exhaust again..i have done 3-4 different setups on that part so far.. the intake will most likely have to be done to get all the power this combo should be making.

i will make up the lost power with nitrous for the time being of course.

 

I thought TXsilverado did the car intake swap and didn't notice a difference and IIRC he was shifting at 6800???
If I wasn't on my phone I would look it up.

 

i remember seeing that, but i think he is cam only 6.0? no aftermarket heads on his setup, and he did a stock ls6 intake, from what i remember... i think the fast usually gains another 15rwhp over the stock ls6 intake.

i have been researching it on tech for a while now... it seems the FAST 90/90 gains a good bit over ls6 intakes... i am looking at a used weind lingenfelter intake for a good price right now, just havent found much info on gains vs. effort of the swap.