kjm

I have a tube chassis all fiberglass 1957 Chevy I am building
For 60 street and 40 strip. I'm trying to see what specs would help
Spool these large turbos on the 6 liter??? I will be building a 427 soon but
Want to run the 6 liter for a while to setup fuel injection and suspension

Is it duration or lobe center or lift tht helps spool turbos???
I know the twin 76mms are large for a stock 6 liter with l92 but the plan is to build a larger cubic inch later.

Car specs
6 liter l92
L76 intake
Turbo 400
3.08 gear
Car weight should be 2900 lbs or so

Thanks Kerry

o2camaross

iTrader: (2)

What turbos? I live in Slidell and if you need any work done I can do it for you...

kjm

Appreciate the offer but I have built several turbo cars, I built chassis and all from ground up. The problem is I know these 76mm with .81 exhaust housing are I little big for 6 liter so I want to find a cam that will help in the spooling of these turbos. I would have gone with twin 70s and it would have been great but being im planing on building a larger motor in the future I went with the 76mm. The main thing I'm looking for is what parameters of the cam help spool the turbo. Is it more duration or lobe center???

o2camaross

iTrader: (2)

The compressor has less affect on spool time compared to the turbine size and a/r. So Ill ask again, what turbos? And what size turbines?

kjm

Do you go to No Problem? if so we need to meet. Thanks Kerry

twins
T4 flange
Compressor Trim: .80ar ; Compressor wheel ind/exd dia.: 76.7/102.3mm
Turbine Trim: .81ar ; Turbine wheel ind/exd dia.: 64.5/74.5mm

o2camaross

iTrader: (2)

I mostly go to Gulfport just Bc it's closer. I work in metairie so maybe one day after work we can meet up. Are those the on3 turbos? I ran one of those on my 5.3 a while back and it ran a 10.9 @ 125. Now I have the gt45 80mm. I don't see you having a problem spooling them. My buddy does it just fine with his t56 ls1 camaro

kjm

I was looking at the Tu3 cams or Cam motion is right down the road from me, they cut my last turbo cam. I think I will see what Stock48 and Martin have to say ... may just get one from one of those guys .. I know they say the cam profile can help spool larger twin turbos I read on a thread where Lil John or martin was talking about it ...

I need to order one this week ..... the chassis is coming together pretty quick. I need to put LS9 gaskets head studs and cam and Im ready to put motor back in for the final time ..

o2camaross

iTrader: (2)

My TU1 works very well in my 5.3 but Im sure you would be better off with a little split since you have rectangle port heads. I can tell you that Martin and Jarrett are going to have different opinions on cam size. From what I have seen Martin generally like bigger cams than the norm, which Im all for lol. I would say get either one to help you spec it out and get cam motion or bullet to grind it bc they both have a quick turn around.

kjm

Hopefully the Cam gods will chime in and shine light on the situation .
If not I will roll with the TU3