Its one or the other for sure.

Someone told me with the ms4 you have to flycut? True?
LS6

N/A and bottle setup.


Leaning towards MS3 because I dont want to flycut and it might be a little tamer for street driving.
But dont want to regret if MS4 is the better cam.





Z

 

Why have you limited yourself to these two cams only? Especially since they're such different cams from one another.

 

MS3 and MS4 are really different???
I know MS4 uses LSK lobes..

Other than that I need a cam for good mid-range and BIG top end power. Plus need to work well on the bottle.

Please explain how they are SO DIFFERENT?

 

The MS3 doesn't require flycutting????

Can Someone else confirm this?

 

my stage 2 patriots and the ms3 didn't require fly cutting.

 

I just sold the MS3 to get the new MS4 & i got the words straight out from Texas speed gentlemen (MS4 don't require fly cutting with stock heads for my buddy's '01 SS)

peace

 

i have the ms3 on stock heads and no flycutting whats so ever! put down 411 rwhp in an auto!

 

I truely enjoy my MS4, but it took some tweaking to get it to stop killing O2 sensors with all my other mods. But I can pull a trailer with tires/gear at 1200rpm down the highway with no bucking at all and it works well with a 100hp shot so far

 

If you have stock unmilled heads both cam will clear fine.

The MS4 is a newer cam designed to better the MS3. So logiaclly speaking why go with the MS3?

Th eMS4 should have better low/mid range over the MS3 but be about equal up top. This is my understanding anyhow.

 

i have the ms4 and i didnt need fo flycut it with my stock heads

 

Got any times with yours? I have the Ms4, hopefully I can get it on a dyno within the next couple weeks. I'm ready to get it done and get it to the track.
Oh, and to contribute to the thread a little, you don't have to flycut with either cam. Both cams are supposed to be bad ***, but only the Ms3 is PROVEN to be awesome on the bottle... Not enough people have tested the Ms4 yet. It seems like everyone so far who got good numbers out of it, had also put heads on the car... But I guess I will see for myself as soon as I get it on a dyno.

 

Obviously he has done the research and wants one of the 2 cams, and they are actually a lot a like. The major difference is the LSK lobes on the intake side of the cam, other then that there isnt much of a difference.

IMO you would probably like the MS4 better, with the LSK lobes the power is going to come in earlier then the MS3 while still making excellent peak power.

 

11.1 @128.2 (11.5 at 128.2 first run) on the first trip to the track, lost the crank pulley on the second run so couldn't run again. Timing was 25 degrees with an air/fuel of 11.5:1, on a 100 shot with a 1.8 60'

 

You guys are swaying me to go with the ms4.
But the guy who is installing my cam tells me the ms4 will not clear and I should flycut?
Maybe the p to v clearence is too close in his opinion?
LS6 stock unmilled heads here.

 

It is a grey area because of piston deck height position. Not all motors are alike.

 

The MS4 will fit under your heads because you dont have larger valves in them. I am pretty sure TSP designed this cam so it would not have any problems fitting underneat stock heads, for the many people that do cam only applications but still wanna make big power.

 

I said they're so different because of the lift. Your cam needs to match your heads, and the lifts are so different that typically it is a different set of heads that matches up better.

 

I don't know anyone who had clearance issues with the ms4. I only know of 2 personally, but I think the issue would have come up somewhere if anyone was having problems.

 

^^^^^What he said...sounds like the guy just wants more work$$$$$$$

 

I guess you could keep the minimal clearance if you don't rev high. I mean, heaven forbid you allow your motor to safely rev high and not have to worry about a valve smacking a piston at 7k rpm.