ok here is the deal i am sure that this has been asked a million times but i just figured i would do it again since the cam has been out for a little bit. i am thinking of putting it in my car this spring. just wondering the pros and cons of it. is it a good cam? is it just a dyno qeen as i have heard? just give me your opinions. thanks

 

The MS3 cam itself is good or great depending on the LSA and advance chosen. A stock displacement motor with 10.0:1 static compression will make more power under the curve with an MS3 ground on a 111LSA with 2-3 degrees of advance while a heads/cam car with compression closing in on 12.0:1 would run best with an MS3 on a 112 with 1-2 degrees of advance. When you get the wider LSAs like 113 and 114, the very small amount you gain up high is offset by the bigger hit in the mid-range. Why? Because the intake valve opening is too late to take advantage of the overlap from the exhaust, the intake valve closing point is too late to make really good dynamic compression and the exhaust valve opening is too early to make good torque on motor (good for nitrous though). By closing the LSA, this all changes.

Please don't take this as a slam on the MS3. In fact, the cam in my high compression 346 is basically an MS3 on a 112LSA with 3 degrees of advance ground in (238/242 .605/.610 112LSA +3). The MS4 is usually touted as having better mid-range than the MS3, but it's mainly because most of the MS4s out on the market are 111-112LSA. If you get the MS3 with the narrower LSAs, they are outstanding.

 

i say go for the ms4. I put mine in and got more mid-range, lowend and peak power over my tsp 231/237. But my ms4 is on a 110lsa with 4 degrees advance. Got the cam help from Patrick G and made great power with my patriot 5.3l heads and stock gaskets. Id listen to what he has to say.

Ive got a link to before and after graphs if you search for my name.

 

thanks for the input you guys that helped a lot ready to go now i just want 430-440hp. pretty good for a girl then it is time to work on the rearend

 

MS4 ..MS4 ..MS4 ..MS4

 

Either way, it's a cam that's mostly top end. I agree on narrowing the LSA for sure.

 

will the ms4 work with stock ported heads and stock short block clearence wise without flycutting the pistons

 

not to hijack, but im curious which would make a better street car, the MS3 or G5X3?