I am planning on doing the MS3 dual spring , ls6 ported pump, and pushrods (stock length) and 3.73's or 4.10's in the rear I have heard many great things on MS3 with stock heads but I'd like some info on this cam with aftermarket heads, P to V clearance an issue wiht a lot of new heads? can anyone gimmie any input on their combo for the ms3 or do u know another big cam for stock heads, that in the future would be more compatible with newer style heads, like dart 225s? or what is a great big cam head combo , anyone to chime in would very much be appreciated

 

stock pushrods are gonna cause valvetrain noise.. might wanna go with 7.425

 

O really? why is that? anyway thanks for the input on the PRs!

 

I would like an answer to this as well... Ordering my cam today and want to make sure I get the right schtuff. When I called Speed Inc they were dumbfounded as to why I would want 7.425

 

i just had the ms3 installed on my car 2 weeks ago or so and i have 7.400 pushrods and there is a tapping sound cause the shop said i need 7.425 so they ordered some for me but there on backorder

 

So 7.425 pushrods are needed for the MS3?

 

im curios also been runnin the majic stick for 8 months with 7.40 pushrods

 

subscribing..

ordering ms3.

 

yes thats right 7.425 for the ms3
you can use 7.400 but you get alot more valvetrain noise

 

could it do any damage or would u just get noise

 

I am using the 7.425 and I have not had a problem atall

 

noise I don't mind. A race car was never meant to be quiet

Is there any risk of damage running stock length pushrods though?

 

I bought my PRC LS6 heads and MS3 from TSP, and they put the 7.400 Chromoly PRs with the package so I guess they'll work. I do hear valvetrain noise, but I can't compare it to anything since I haven't heard a MS3 with 7.425s.

 

Wow thats kind of weird I wouldn't think .025 inches would make that much of a difference thats like 2/3 of a mm

 

TSP recommended the 7.400 to me when I was considering that cam.

 

That .025 may be the differance between preload and no preload with the pushrod ratteling around.

 

the guys at the shop said it would not cause any damage just the noise.

 

So were still undecided on whats a better size?
TSP says 7.400
But people on here are saying for less valvetrain noise 7.425s