Vvl sr20 q

[Options13]

I am upgrading my head on my sr to a VVL p11 head. I have a question about the cams i can run in it..

At the moment i have wiesco pisons 9:1:1 compression ratio with no valve releif indents on the pistons...

If i get the N1 cams for the VVL head will i have piston to valve contact?

[MaxS15]

Having done this swap myself, and I was never able to figure this answer out for sure, so I didn't chance it. A thicker head gasket will help if you are going to chance it, but that will alter your compression ratio.

I got CP VET pistons which have valve reliefs. These people base their business on knowing their stuff.

I'd ask yourself why do you want N1 cams on what I assume is a turbo engine? I'm not an expert on timing, overlap etc, but all I ever read about them was they were by far the least suited to a turbo application.

[hanzbrady]

You can run them in theory, but you'll have to be exact with your piston to valve clearance and we personally do not do it at the shop.

As for the N1 cams on a turbo application I'd advice against it, but another thing to consider is that Kelford is on indefinite back order until we get an update in June.

[jr_ss]

If you have no valve reliefs, you cannot run anything other than the stock P11's.

N1 cams are actually suited well for the Turbo engine, especially if it's a larger frame turbo. Overlap will help to spool the turbo and allow the motor to breath.

[brndck]

If you have no valve reliefs, you cannot run anything other than the stock P11's.

N1 cams are actually suited well for the Turbo engine, especially if it's a larger frame turbo. Overlap will help to spool the turbo and allow the motor to breath.

I bought a sr20vet already assembled and running, built by some shop in Oregon, it had p11 head, p11 cams, forged bottom end (cp pistons, eagle rods) but they were just sr20det pistons, not VE pistons with valve reliefs. Even with this setup, when I pulled the head off, there were marks where valves had kissed pistons.

Do yourself a big favor and just bite the bullet and order some CP pistons with the valve reliefs in em.

[jr_ss]

I believe it... My factory DET bottomend I had pulled all my VE components from, looked like it had tagged the pistons on one and two. This wasn't enough to cause serious damage, but clearance really isnt there for larger cams. I believe it's more of a valve duration/cam centerline issue than anything else.

I have JE DET pistons in my motor currently and they should allow plenty of clearance for N1's or P12's. Do yourself a favor and buy some pistons with valve reliefs or have them flycut. I personally like the DET JEs because they bump your static comp into the low/mid 9:1's depending on your setup. That comp ratio isn't available unless you have a custom piston made for the VET. 10:1 isn't 93 friendly and 9:1 is too low for off boost response. Granted, most people building VETs are looking for big power or response and E85 is the better fuel of choice if available. It is not readily available for me, hence my 93oct setup.

[Options13]

awesome. thanks for the informations guys! i went ahead and ordered cp pistons, lol

I'm thinking about running flex fuel, are you able to run water/meth with e85?

[jr_ss]

awesome. thanks for the informations guys! i went ahead and ordered cp pistons, lol

I'm thinking about running flex fuel, are you able to run water/meth with e85?

Wouldn't running water/meth be kind of pointless? I mean I get that meth will increase the available oct. but you aren't getting the other benefits of water/meth.