head shaved

[357warrior]

hey was wonderin i was gonna get my head shaved 30 thousandths and seen some only went 15 thousandths was wonderin if that would be a good investment and also goin with +1 intake valve

 

[357warrior]

with that im run heavy duty valve springs with titanium retainers, and megacycle 252/1 cam with je 12:1 comp piston

 

[Gen1Pat]

I wouldn't deck it that much. At .015" you start cutting into the bosses for the exhaust studs, and you get pretty close to the valve margin. I feel .030" would be too much. If 30ks is your goal, deck it 15ks and leave out the base gasket. Mind my asking why you want to take 30ks off when running a 12:1 JE?

 

[357warrior]

lil more compression want it to run ggod

 

[357warrior]

i got a 80 thousandths spacer under the jug for the 4mm stroke and no gaskets i use blue silicone

 

[duneracerweston]

Dude, your already at 13.3:1 compression.... thats plenty! Port, good intake and that thing will be a bad ass!

 

[357warrior]

13.3-1 is that without shaving the head or 15 or 30 with

 

[Gen1Pat]

It'll run great without decking. I forgot you were using the +4 crank. Doing that with a standard crank's piston will allow you to play with deck height just by what spacer thickness you decide to run

 

[357warrior]

with the spacer i got now im real tight to 0 deck height and the cometic head gasket is like 28 thousandths i believe

 

[duneracerweston]

13.3:1 is what you have now, you shave 15k your gonna be knocking on 14:1

 

[Gen1Pat]

I wanna see pics of the spacer. Because, when it comes time to do a top end to my stroker, I'm not buying a "stroker" piston.

 

['00 WO-YA!]

Pat, if they do it like they do for smokers it'll be a .040 aluminum shim with 2 paper gaskets that are about .020 apiece. I guess you could also call cometic and get one made that's .080 and silicone it in.

 

[Gen1Pat]

I'm more curious to know how the o-ring looks when it is installed. It would be easy to make it yourself just by cutting it out. I still would rather have the big bear cylinder turned down.

 

['00 WO-YA!]

I'm not sure it would even really affect the o ring. I can't remember I'd my bike even has one.

 

[Gen1Pat]

It should have. I would think you would have experienced lower then optimum oil pressure.

 

[jasonp]

13.3:1 is what you have now, you shave 15k your gonna be knocking on 14:1

I'm not sure how you are coming up with 13.4 or 14:1?

 

[jasonp]

I wanna see pics of the spacer. Because, when it comes time to do a top end to my stroker, I'm not buying a "stroker" piston.

I got some pic's before I installed, I will post them up.

 

[jasonp]

with the spacer i got now im real tight to 0 deck height and the cometic head gasket is like 28 thousandths i believe

Yeah I wouldn't run anything less then .030-.035" with 0 deck height installed. Anything closer and you are going to run the risk of parts making friends.
I would be careful on how much you take off the head, Pat was correct that you start to get close to the valve seats. I would take it to a machine shop or send it in and tell them what you want to do. It shouldn't be to much.
You should have a pretty strong build and end up with around 12:5 compression. To make it run strong get a good cam, with the head setup for a 38mm carb, with raptor intake that is ported to 38mm and flat slide carb. Make sure and degree the cam in.

 

[rappy'97]

I agree with Jason. You are nowhere near 13.4:1......

 

['00 WO-YA!]

It should have. I would think you would have experienced lower then optimum oil pressure.

Oh yeah, that one, I thought you were referring to the ring around the bottom of the cylinder.