I am putting a LS1 w/ 4l60e with shift kit and stall in my 89 Iroc.

Here is the setup I'm going with:
MS4 cam 110 or 112 LSA i think
prc 5.3 2.5 heads milled to 59cc
LS6 intake with ported TB
Hawks long tube headers and full exhaust w/ cut out

The car is also going to have 4th gen rear end w/ 3:42 gears.

What do you guys think I should go with for a stall?

 

3200rpm at a minimum.

 

I was think of 4000 but am affriad that might be to much. If it makes a differance the car will just be a weekend cruiser with see a few tripa the strip each summer

 

3600rpm would suit well. with a lockup converter, you still get really good driveability and reap the benefits of a stall. spend some money and go billet for sure.

 

3200 minimum? That's inadequate for a STOCK car.

You'll want a 4000. I have a the same heads and cam in my 4th gen. The 3600 I had in it originally was not enough. Anything under 4000 will hurt performance and you'll get all kinds of driveability issues, regardless of who tunes it.

 

that's a pretty broad statement.

3200 may not be what YOU want, but that doesn't mean its inadequate for a stock car.

what driveability issues are you referring too?

 

It doesn't matter what I want, it's what the engine wants. The powerband dictates the torque converter. LS engines tolerate big converters much better than older architecture does. If you cannot deal with a loose converter, what are you doing with a cam large enough to require it?

The MS4 is a bitch to tune with a converter that's too tight, even by the best tuners in the country. I had idle issues and surging at low RPM with my 3600. After being disappointed with the drivability and performane, I put in a 4000 and it was like driving a completely different car - with the same tune.

 

MS4 is a huge cam. With 3.42 gears, I assume you aren't primarily using this as a drag race car.

Fellow racer here has that cam, LS6 intake, stock untouched heads except for valve springs, stock TB, TSP tune, in his '99 'Bird, and runs around 5000 stall in a TH350 (tranny brake, reverse pattern valve body). Stock seats removed, 6-point, and racing seat for an interior. The car is wicked fast (11.0's at sea level). Pretty sure he's running something like 3.73 gears in a 9" (need to ask next time I see him).

Oh, yeah, after a few years on the torque converter, it was acting up, so he put in another one while his was reworked. It was too tight at our altitude, but ran well at sea level (Topeka). He was having issues with it idling correctly.

 

no deff not a drag car, just a fun cruiser with the occasional trip down the track.

 

Sorry, I missed your follow-up post:

Then you don't want that cam. Maybe the MS3.

Probably don't want to mill the heads, either.

 

Yeah I found that out after reading some posts so now I'm just going to use a 228r cam with long tube and an e cut out with a 4th gen rear with 3.42s and 3200 fri stall. Figures that would be a good street and fun at the track every once in a while

 

That's an odd recommendation considering that they offer identical powerbands, yet the MS4 produces more vacuum and has better driveability. Neither likes stock compression or an LS6 intake.

 

The MS4 has more intake duration and more lift. But, you're right, neither offers very good driveability.

The 228r is the better choice.