Hey guys...

Blah blah, the guy with the Saab, blah

Anyways, I'm doing a 400whp build and I figured i'd come to you guys when it comes to things like CAMS. I'm not very good with figuring out cams, I know a few things about duration and lift, but not very much. I sent an email over to JBP today asking them about a cam grind.

The car is turbo, it's going to be using a GT3071R, valvetrain, forged rods/pistons, *cams*, and then headgasket/headstuds, 630cc injectors and the walbro 255lph fuel pump with 6-7gph of methanol injection. That's pretty much the meat of the build.

For reference, here is the stock cam profile for the motor:
What should I be looking for as far as a new grind?

 

i take it, your cylinder head is set up like the lsj head with the cam sensor and all that fun stuff?

 

yes it is

 

Sandcast LSJ head = Saab head...

 

Click

 

I would guess that something like the 272 grinds some LSJ guys are using would be quite well suited for your turbo app, but I couldn't say for sure.

 

i take it you have tuning software, ala hpt?

 

im gonna throw this one out there...

comp cams turbo grind?

 

272 grinds are perfect for turbo

 

it's going to be custom tuned on the dyno by Nordic in a few months, we don't have HPT software for this ECU

The A/R of the turbo is 0.64, internally wastegated with a T3 turbine housing. I'm guessing the boost will be somewhere near 23psi

can you guys throw links at me?

 

stock cams will support a good amount over 400whp.... just look at my car.

on a gt3071 23-24 psi should put you where you want to be

 

ya know. id stick with the stock cams for as long as you can.

i wouldn't upgrade unless it becomes a flow issue across the head itself.

 

stock cams will support a hair over 475 crank and the stock head is good to abit over 500 so you should be in the clear

 

I don't believe HPT is out for the Saabs

 

it isn't as far as I've seen from their forums

 

paul. you're thinking blower stuff. turbo car, different grinds stock



::turns on light bulb::

 

oh yeah lol. forgot saabs came with the correct setup from the factory

heads are the same, and I don't think the cam grinds could be too different from each other

 

dunno about the grinds. guess if i get bored enough i can dig up the info on them

 

good advice and it is a turbo as you say

 

I posted the stock cam grinds in the OP

I only have one chance really to get it tuned, the guy has to come from Sweden to do it.

 

The LSJ 272s are reground from LSJ cams with a wider LSA (preserved stock) then he would want. His LSA is a bit too tight for a 272 regrind imo.
I would say something similar to this. Slightly longer duration than stock for higher rpm use, near similar overlap with much better lift.