SE 110, SE MVA Head milling??

[TXCHOP]

I have a few questions for any one here that has worked with the MVA or SE 110 heads. Since they have the same chambers, how many cc's can they be milled safely to? roughly.. With or without ACR, what ever is needed.

Also, has anyone done 20/30 degree domes with these heads? If so, what happens to the ACR's? Plugged or welded?

Just curious..
 

[aharp]

I believe Scott has set them up for 30deg pistons. Ive wacked them down to 86cc without issue

[Don Dorfman]

They (HD)makes plugs, or they can be welded.
on the cvo head
Usually after valve work they end up large and to get them down to 90cc  takes about a .060-.070 cut. I have taken them down to 88. The ACRs have to be shimmed up at that point or really after any more than a .030 head cut.
I like pistons on these motors rather than a head cut. BTW manifold faces need cutting proportionally. The valve seat is close to the edge.
There are better heads to start with from HD, guys get seduced by prices on Ebay.

[Gmr-Performance]

The plug is the best way to go vs welding much easier and simple process, 88 cc is about as far as we have cut them, Like Don said a piston is a better way to go. Shim the ACR if it is to be used,  the valve is very close to the edge proceed with care.

[aharp]

I havent found a hi comp piston in 117"+ configuration for use with these heads. If its for Dan's bike then id like to know what he's up to 

[TXCHOP]

No....unfortunately this isn't mine..Thanks for the info guys. Kinda what i was figuring, not a ton of meat to mill off.

Got a customer with a 117ci(i assume, its what he told me, no paperwork) that a local shop built for him with cvo110 heads on it..This shop is now gone. They must have slapped this thing together before they closed the doors as its a wreck of mismatched parts that burns oil, blows oil, leaks oil, and runs like a turd. I dont know what's in it, but i am trying to give a quote for the way I would build it. Dont know if his pockets are deep enough for my taste. 

Talked to Chaz quickly today and he said, best way out for the compression i wanted was their angled domes whacked down to whatever comp needed, and the head machining to match. I assumed the heads can handle a 20 deg dome with the ARC plugs? I forgot to ask.

[Don Dorfman]

I have not and would not approach it that way. You need to weld it up IMHO. Otherwise you will darn near machine the screw plug away making the angle cut.
Ask Chaz they have done this already.

[TXCHOP]

Yeah, Thanks Don..We didn't get into specifics, but i will check back with him if the build actually happens which i doubt. Dont know if he going to want to drop another 7k+ after the last shop bagged him for almost that the first time.

[Gmr-Performance]

I was speaking of a slight milling job. But as I said piston is the best way... But hey what do I know. I have a set of MVA heads that have perfect guides and valve job..  Even Short turn is in 98% of perfect. A small amount of work and they will be ready to go.. Will do before and after flow test.

What head do you think that is better than the MVA CNC head??

[wfolarry]

Hurricane 

[aharp]

I recently did a 117 with reworked 110 heads. No problem getting over 11:1 with flat tops

[hdryder]

Did one last year just this way. Turned out just fine. We welded the heads rather then use a plug. Watch the seats with welding though. I did talk with axtell about this same situation with 20* pistons and acr plugs. They feeling I got from them was that the plugs would be fine to machine.

No....unfortunately this isn't mine..Thanks for the info guys. Kinda what i was figuring, not a ton of meat to mill off.

Got a customer with a 117ci(i assume, its what he told me, no paperwork) that a local shop built for him with cvo110 heads on it..This shop is now gone. They must have slapped this thing together before they closed the doors as its a wreck of mismatched parts that burns oil, blows oil, leaks oil, and runs like a turd. I dont know what's in it, but i am trying to give a quote for the way I would build it. Dont know if his pockets are deep enough for my taste. 

Talked to Chaz quickly today and he said, best way out for the compression i wanted was their angled domes whacked down to whatever comp needed, and the head machining to match. I assumed the heads can handle a 20 deg dome with the ARC plugs? I forgot to ask.

[strokerjlk]

Hurricane

[TXCHOP]

Dam that port is huge! Thanks for the pics Jim. Sent ya a pm.

Seeing that pic, why cant that plug just be tig'd and smoothed? Looks structural enough to me?


Thanks Guys for the info. Keep the info coming, great conversation here.

I put the phone call into the customer today with the final quote. If he jump on i will updat this thread.

[TXCHOP]

BTW, that Hurricane port looks raised a bit as well.
 Can anyone verify? I see the casting is machined up top like Baisley's Hybrids.

[POORBOY]

That pic looks dam good Jim,   

[strokerjlk]

That pic looks dam good Jim, I get my nut off making them chips fly. 

 
nice job.
considering who sent me the pic. I though they were done on the west coast.
hell they give me a nut just looking at them. 

[HILLSIDECYCLE]

BTW, that Hurricane port looks raised a bit as well.
 Can anyone verify? I see the casting is machined up top like Baisley's Hybrids.

Dan,
"Midnight Sportys" 124"er has the 110" heads(with 2.125" intakes) on that, w/30* domed J&E's. Wood 10FG.
62 HPI.
Welded the release holes and installed 2 externals.
Scott

[wfolarry]

BTW, that Hurricane port looks raised a bit as well.
 Can anyone verify? I see the casting is machined up top like Baisley's Hybrids.

It's raised. That's how they get the 340 cfm out of 'em.

[aharp]

Larry,
Do you know what the exhaust side moves on those hurricanes?

[wfolarry]

It's the same as the MVA heads. Soft down low, picks up after .400 lift.

[Gmr-Performance]

Ok I guess I had that coming  , but other than than head.. The CNC MVA does a great job on the bigger engines. Got a set coming for a back to back test on my own 107.   

[HILLSIDECYCLE]

Hurricane

I've seen that picture before.
Looks all too familar.
Used to machine the Evo's, too, for the 30* J&E's that Axtell carried.
Found that if you mearsured the top of the piston(not the bore diameter, plus .020") the squish band would come in nicely.
Scott