98MustangSTL

Alright so who's running a PI swapped car with VT Stage 2's? Clearance issues? Power made? Etc....

I'm thinking about putting these cams in while the motor is in the car. Just leaving the car in time and putting them in...

Chris98Gt

You cant use vt stage 2 cams with the stock npi pistons you will have ptv issues. You need to get a set of dished pistons for clearance, but I got a set of compcams stage 2's for the npi with 495 lift and did not have to dish my pistons when I did the swap.

Mark99GT

Wrong. PTV occurs on the outside of the piston. Dish has nothing to do with it. You need to check the duration and lift of the cam to determine if there will be PTV issues (and make sure its installed properly). You should have no problem withthosecams if you degree them. Dont expect to just drop them in and drive it.

Chris98Gt

why do all the site say must use notched pistons for stage 2 and up pi cams then???? Please explain... Btw I meant notched when I said dished in the first post.

Mark99GT

Where are you reading that you need flycut pistons for stage 2 cams? I know you need them for stage 3 stuff like the comp 278s.

Chris98Gt

Well mmr sells comps for pi heads that need notched pistons. I thought vt engines did too, I cannot find it saying that anywhere.Although they don't specify for use with npi pistons. I always thought that much lift was too much. But if he knows they'll work go with em.

Mark99GT

I know what you're saying. MMR's site isn't 100% accurate imo. It claims their notched pistons are required for all stage 2 and 3 cams. Well, not all stage 2 cams are the same andnot allrequire flycut pistons, so that is incorrect. Ive spoken with people who have installed the comp 270s (Im assuming those are MMRs "comp cams stage 2"). Plenty of people have VT stage 2s with no issues whatsoever. OP: Just call VTengines and ask them over the phone, they design the cams, they'll answer your question. And get new valve springs with the cams.

Hash06

i emailed vt engines a while ago about this and they said it is fine to run the stage 2 cams with npi pistons you only need to to make sure they are installed correctly

andy98gt

Yeah Scott at VT told me I could run a stage 2 cam as well....

Silver2000stang

call scott at vt, he told me i can run stage with pi heads, ask about npi, he'll be happy to help you