[k24/20 frank]

Ok I'm building a a3 vtec killer (with a k24a1 head) with a type r crank and type s pistons. I'm guessing my cr is goin to b around 11.5:1. I know that 93 octane will b ok run with that but I was considering decking and milling the head to 30 thousandths. I know this will change my cr, but Idk to what. Let's say 12.5:1 would 93 octane b ok and if so what would b my limit? 93 is the only thing readily available that I know of around my area.

 

[Deadphishy]

http://www.csgnetwork.com/compcalc.html



depends on the cams. I would clay the motor if your milling the head.

 

[k24/20 frank]

Well its type s cams and valve train. I was under the impression that stock v.t., cams, rods and pistons meant no p2v clearance issues. Even with the head milled it shouldn't b a problem with the oem parts I'm using.

 

[k24/20 frank]

http://www.csgnetwork.com/compcalc.html



depends on the cams. I would clay the motor if your milling the head.

Does the link u provided show anything to do with my build or was it an example? I'm not sure how to get my info to put it on there?!?!?

 

[Deadphishy]

If you are building a motor, you or your engine builder should know all of those measurements. Most of them you can find with google because they are constants.

 

[Deadphishy]

Your starting compression will be 11:1 with type s pistons. You are using a k24a1 head which has the same combustion chamber as a k20a2. For the sake of simple math, if you remove .03 from the head, which is the normal thickness of a head gasket, you get 11.97:1.

you should be fine on pump gas, although i wouldn't mill the head.

 

[k24/20 frank]

Why shouldn't I mill it? And it is ported by a guy on here, with type s valve train rocker setup and cams. I'm tryin to squeeze a lot outta oem parts for a dd.