Hulkls1

iTrader: (2)

I have 42# one now what size do I need ?

68 SS

iTrader: (23)

Gonna need way more info than that to get an answer. Whats the combo? HP goal? Motor specifics? Turbo specifics?

Blackpanther99

iTrader: (8)

Indeed^

What fuel? Whats the setup?

Twin turbo c5

more info.

Hulkls1

iTrader: (2)

It's a 5.3 I opened up the top ring to 28
Patriot ls6 heads
Ls1 intake
Gt45 turbo
Twin walbro 225 pumps
8an feul line
Stock feul rails for now
Heads studs ls9 head gaskets
I want to make around 650-750 hp to rear wheels
I have a level 5. 4l65e tranny with a fti 4200 stall and 4.11 gears

Twin turbo c5

80lbs Siemens deka work great on that setup . I have a similar setup but with a 4.8 .

Blackpanther99

iTrader: (8)

Agreed^ 80lbs will do the job an have a little room for more boost.

aknovaman

iTrader: (7)

Too high of a stall and too low rear end gears for a street turbo setup. I recommend 3200 stall and 3.27 range gears.

Hulkls1

iTrader: (2)

Why to high of stall ?

aknovaman

iTrader: (7)

It is better to lug the engine down low with 'highway' gears to build boost and the slippery stall will not allow this to happen.

Hulkls1

iTrader: (2)

Oh ok this in my first turbo build i didn't now know that . Will the stall work good at the track ?

skinnies

iTrader: (33)

Siemen deka 80's

HRHohio

If you keep that stall, consider dropping the rear gear to 3.23 or 2.73, otherwise you'll be blowing through your gears faster than you can build boost.

Are you running 1/4 or 1/8th mile track?

68 SS

iTrader: (23)

Agree, 80lb injectors will be fine. Also agree on the stall and rear gears too much for a street turbo set up.

Hulkls1

iTrader: (2)

I can send it back too fti can get in too a 3200 I just called them I have a set of 373 and 323

68 SS

iTrader: (23)

3.23 rear gears and a 3200 stall should be on the money for it.

HRHohio

Definitely drop down to 3.23s, regardless. I'd like to see what it would do with the 4200 stall and 3.23s. Jumping right into the power band would help launch (in theory), and the 3.23 gears will help load the turbo and let you wind out gears. If you have the time, maybe put it together with the 4200 and see what it does (with the 3.23s) before you send it back to be re-stalled. If they're going to do a straight swap (and it has to be unused) then just send back and get the 3200.

Hulkls1

iTrader: (2)

I will try it with my stall and 3.23 gears first butif it sucks ill send it back its 375 to cut mine open and make it a 3500 he said . I'm trying to find a good cam too not real sure if I **** to go with the ls9 cam

HRHohio

I'll sell you mine! I'm looking for a custom grind for my convertible.

I'm very likely going with: 228/234 .588/.598 on 114 LSA

I put one (228/234) in my 4.8 build (in progress). It will hopefully spool the turbo up fast, once I get the car back from my body guy and the engine put in. Waiting.... waiting... waiting... uggh.

You might hit up Martin Tick Performance. He's pretty reputable for spec'ing cams and could either spec a custom one or has one off his shelf that will work good for you.

Hulkls1

iTrader: (2)

I'll look him up the one I just got I know won't work it's 230-230 615-591 111lsa it sounds nasty in my ls1 though . My tune said to go with a cam that has 118 lsa and over I don't really know