Evo build with 625 lift cams and 10.5-1 compression

[Adam76]

Adam,
Mill your stock heads. You can go in the 70's range, with NO interference, and those pistons.
John

Thanks, really appreciate your input. 

[Adam76]

   You may have to file your manifold slightly to get some clearance if you cut the heads at the upper limits.  That will become obvious when you start to assemble it.

Thanks kd, I hope that cutting them down to 80cc isn't considered the "upper limit" ?
I don't want to have to deal with manifold gasket leaks 

[kd]

   You may have to file your manifold slightly to get some clearance if you cut the heads at the upper limits.  That will become obvious when you start to assemble it.

Thanks kd, I hope that cutting them down to 80cc isn't considered the "upper limit" ?
I don't want to have to deal with manifold gasket leaks 

I have 2 Evo's with SE heads.  IIRC (it's been a while) one of the major differences to the stock heads is they are cut .060.  Having an OEM manifold fit tight after decking them is not unusual. When they are cut they settle lower into the V between the cylinders and that's what closes the gap.

[turboprop]

The Wood W6HF is closer in spec to the the T-Man 625. Very different cam than the W6H you refer to in this thread.

Someone mentioned something about which tuner was used. Is this an Evo with a carb?

Thanks turboprop,
I haven't seen the W6F cam on the Woods website. The only one I see is the W7, which could work. But I don't want it to be a dog under 3000rpm.

And yes, it is carby. So tuning is a little less precise I guess.

Do you have experience with the W7 cam? This might be a good option with 10.7 compression.

Not sure where you are getting the W6F from, I certainly didnt mention it.

I mentioned the Wood W6HF, it can be seen in the designer cam section on the Wood website.

I usually do not do this, but here is a link to it on the Wood Cam website.

Wood W6HF Designer Cam Page

[Adam76]

The Wood W6HF is closer in spec to the the T-Man 625. Very different cam than the W6H you refer to in this thread.

Someone mentioned something about which tuner was used. Is this an Evo with a carb?

Thanks turboprop,
I haven't seen the W6F cam on the Woods website. The only one I see is the W7, which could work. But I don't want it to be a dog under 3000rpm.

And yes, it is carby. So tuning is a little less precise I guess.

Do you have experience with the W7 cam? This might be a good option with 10.7 compression.

Not sure where you are getting the W6F from, I certainly didnt mention it.

I mentioned the Wood W6HF, it can be seen in the designer cam section on the Wood website.

I usually do not do this, but here is a link to it on the Wood Cam website.

Wood W6HF Designer Cam Page

Yes, sorry that was a typo 
W6H was the cam I was referring to.
Cheers

[jsachs1]

   You may have to file your manifold slightly to get some clearance if you cut the heads at the upper limits.  That will become obvious when you start to assemble it.

Thanks kd, I hope that cutting them down to 80cc isn't considered the "upper limit" ?
I don't want to have to deal with manifold gasket leaks 

To get to 80 cc on stock, un-milled EVO heads, isn't even close, for a manifold fitment problem. Even if you use .030" head gaskets.
John

[Adam76]

Thanks John.
Sounds like a plan. 

[jsachs1]

April, 8 sets of Evo heads came in for mods from 2 different shops. Since there seems to be some uncertainty/confusion about what can be milled off the heads, without effecting other components, I'll try to list my experience with this.
This will pertain to H.D. STANDARD 1340 Factory cylinder heads that are stock. NOT Sceamin Eagle, after-market, etc.
I find that up to, and including .060" is the limit that can be milled, using .030" head gaskets, and .020" base gaskets, without altering the intake port pad area. Like all things modified, when using domed pistons, dome area to head needs to be checked. FWIW, I've never had to alter domes, with the pistons I use, because I've never been near the .060" limit.
I also find that the factory STANDARD Twin Cam engines, and some Twin Cam CVO engines are OK with the above mods. (Disregard the base gasket, as Twin Cams use O-ring seals). John

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[aswracing]

Off-the-shelf Evo Big Twin pistons ...

[Adam76]

Off-the-shelf Evo Big Twin pistons ...

Thanks, I have all the piston catalogues as well.

I'm going with a Wiseco 10-1 with the heads shaved to get me to 10.3 which is exactly what I need.

[cheech]

Wiseco still lists a 11:1 piston also for Evo FWIW.

[jsachs1]

Wiseco still lists a 11:1 piston also for Evo FWIW.

Too much dome.
John

[SP33DY]

I don't know if Axtell angle dome pistons are still available. Someone told me that Ron retired. When I was doing a lot of Evo's, that was my favorite piston. Just cut the head to match, and set the squish. Ported heads and HQ-0023 cam was a good combination with the Axtell pistons.

[jsachs1]

I don't know if Axtell angle dome pistons are still available. Someone told me that Ron retired. When I was doing a lot of Evo's, that was my favorite piston. Just cut the head to match, and set the squish. Ported heads and HQ-0023 cam was a good combination with the Axtell pistons.

Hard to beat the 0023 cams on an Andrews billet back in the day.
John

[JSD]

John i appreciate your Advice . In oz we bath tubed heads . Hd copied for TC . They always behind the thinking performance man