dans94z28

iTrader: (2)

Stock radiator and fans. Still fighting the down pipe..not sure what to do and running about 18-24 inches of pipe and dumping it as of right now.

Ping King

iTrader: (20)

What K member is on there? You can fit a 3 or even a 3.5 on a stock k member.

dans94z28

iTrader: (2)

Stock k member. Dont have the money for a nice k member for a while. 3" Will choke it im sure and 3.5 i think will be what i have to accept.

skinnies

iTrader: (33)

3" is good for 850rwhp, how much power you trying to make?

BMF_Racing

iTrader: (6)

x2 was getting ready to say the same thing. 3" is plenty unless you plan too step it up in the future.

dans94z28

iTrader: (2)

As much power as i can w what i have. just trying to make whats there as efficient as possible. How do you come up w 3" is good to 850? My original plan was all the back through my magnafow exhaust. What i have to go by is the math i found doing my research, down pipe should be 120-130% of the exducer and that puts me 3.5"@120% or 4"@130%

dans94z28

iTrader: (2)

Only ask because this m first turbo build and like most still learning.

RedRocketZ28

iTrader: (19)

Numerous people have made big power through a 3" downpipe. I put down 606/570 with an on3 turbo on 14 lbs. I now have a Turbonetics 7875 on 16-17 lbs. and it runs pretty well. I would dare to venture I am close to 700 rwhp now through a 3" downpipe.

HexenLord

You can make tons of power on a 3" setup. Around 750 at the flywheel it'll start causing some issues with back pressure.

This doesn't mean that you won't make more power with a larger exhaust, because you will. It just means that power can still be made. With a 3" turbine outlet, I picked up 50 whp going from 3" to 4" (cone coming directly off of the v-band flange) in a relatively low power setup.

The longer and more bendy the exhaust, the more power that will be lost with a smaller diameter pipe. If you have a straight dump coming off of the turbine, the gains wouldn't be nearly as big going up to a 4" as they would be if it was a full length exhaust with mufflers.

1fast bird

iTrader: (22)

Spohn solid mounts and a stock k-member will allow a 4" downpipe. May be a decent solution?

skinnies

iTrader: (33)

I know because we have proven it in real world testing.

dans94z28

iTrader: (2)

I trust in real world testing and i like the idea of solid mounts for extra clearance. As of now im working on a 3.5" two 90s w a offset through the k member past the starter and straight pipe back to the axle wwhere i will pick up the 3" and have a cut out for the track etc.

boostit5.3

iTrader: (3)

what do you have the alternator relocated with??

dans94z28

iTrader: (2)

Factory bracket and made two supporting brackets that i havent finished yet.

68LS1WANNABE

Since your alternator is moved up, if you went with some spohn tubular solid motor mounts how much room would you have routing it there? Wondering if you could get a 3 inch between the motor mounts and the block?

dans94z28

iTrader: (2)

Right now i have a 3.5" in there but its really tight. Im worried about getting knock retard from it rattling so. Ive heard that the solid mounts make it pretty loud inside on a street car. Anyone have any input on this that have them installed?

TurboJoe@Straightline

its tight but a 3.5 in down pipe will fit throught the AC spot of a factory k member...

68LS1WANNABE

I was talking about on the drivers side. Looking to route a charge pipe from a rear mount up to the front. just wondering if I could get a 2.5" pipe somewhere amongst the steering shaft, tubular mount, or block if the alternator is moved out of the way.

dans94z28

iTrader: (2)

I agree, it should work. People run larger down pipes through that side without issues.

mrstepheneades

Just shoot it out the bumper lol and be done!!