357i

iTrader: (4)

To bring you up to speed, I'm running a mostly stock LS1 with a TC78. The entire setup was made by me to fit the tight constraints of a BMW engine bay.

Here are a few pics of the setups progression











Made a plan for the wastegate:









Wastegate is a PTE 46mm. I really thought this setup would work great. It does not. I have a 7lb spring in it with no boost controller. The wastegate is an open dump and the car has a full 3" exhaust. The gate opens right at 7.5-8psi. It will hold 8-9 psi in 1'st gear, about 11psi in 2nd gear and 16 in 3rd gear. I havent run it at all in forth gear, but I can imagine that it will continue to climb. I guess this winter I will pull it back apart and try something else. Tight spaces will not allow me to run a wastegate right out of the side of the collector. Any other ideas?

Forcefed86

iTrader: (4)

How much room do you have on the pass side? Can you add another gate to that side? If you went to a larger turbine housing it would be easier to control the boost as well. What is on there now?

turbocamaro125

iTrader: (3)

It looks like that setup should work good. what exhaust housing? .96 t4? I wouldn't think back pressure at that low boost would cause that...I had a single 44mm tial gate welded 90* off of the merge with a cammed ls1 and a t6 s480 and it would hold right a 9lbs with a 8lb spring.....idk try adding another 46mm gate.

Camaro9969

iTrader: (12)

Can you post pictures with everything in?

357i

iTrader: (4)

it is a .96 AR T4.

Adding a second gate will be tight. I feel like the single should be more than enough if set up correctly.

Here is the whole package

357i

iTrader: (4)

was considering coming off the back of it like this:



or i may have room to do something like this:

stevieturbo

Cant see in the picture, But how have you the w/g signal line plumbed ?

For low boost you should be blowing boost directly into the bottom port only.

357i

iTrader: (4)

Line straight from manifold to bottom port only.

redss82

you have the wastegate plumbed from the intake manifold? if so try running it straight off the compressor

357i

iTrader: (4)

Yea, that was my mistake, I was thinking about the hose I ran to the BOV. The wastegate is hooked to a fitting coming out of the turbo outlet.