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[dave brode]

Hello All,

Thanks for letting me join.

I have a old '02 FLHT that has a fairly warm 95", but it's been 10+ years for it, and I'm thinking of going to a bigger combination. I'm trying to get up to speed [pun intended] on the CVO110 head, and other heads that appear to me to be similar. Please forgive me for my ignorance, as I haven't been paying close attention to what late and great until a few weeks ago.


** I see take off CVO110 heads that have 17248-07 casting number, and others that are 17248-07A. I assume that the "A" suffix means it is a later revision? Rears that I've seen are all 17250-07. Are there any other versions that were oem installed on 110s?

There is a thread here in which a vendor claims that the earlier CVO 110 heads had a correct throat diameter. And, the later ones have a raised 45* seat [like at least the first batch of the early bathtub twin cam SE heads]. Do the earliest heads with the correct seat inserts have yet another casting, or were they the "-07" just with proper seats i.d.?

*** Are the "MVA heads the same casting as CVO110 heads, just fluffed up?
      In the 2018 performance book, I see references to "ACR" heads. Are they another similar head with automatic compression releases? 

Thanks to anyone that'll give comment.
Dave Brode
p.s. - I know that the CVO 110 need a big engine under them....

[prodrag1320]

we use a lot of 110 heads on our 107 to 124 builds.after guide replacement,they are very nice foundations for any given build.remember the combustion chamber are bigger than other OEM HD castings and need to be addressed with special domed pistons for smaller motors (which we keep in stock).feel free to call if you've got any other questions for your exact build

[HD Street Performance]

The 110+ heads were a different casting number and smaller csa. I am not sure they are avaluable any more. They are used to make the cnc mva head. The stock 110 casting came from one of two foundries. Either are fine, the later the better. Less core shift. When buying them I stick to 242 t5 alloy, they are marked. Dave I know you from htt many years ago and we have similar interests. Feel free to call me and I will help you. I realize you are a do it yourself guy but I am ok with that.

[dave brode]

Thanks, Gents!

I'll call you both asap. I wondered if anyone here was on the old HTT board.

The '07/08 touring recallheads seem to be plentiful out there. Fwiw, here is a thread in which a fellow describes how to identify them.  Post #22. 

http://www.v-twinforum.com/forums/twin-cam-engine/162572-110-heads-need-help-2.html

Is the T242 T5 identifying markings cast in, or stamped?

Thanks again.
Dave

[HD Street Performance]

By the foundry logo

[dave brode]

Found a pic.

Fwiw, those had a 17248-07, rather than -07A.


Thanks.

[HD Street Performance]

Those early heads usually have some cutback under the intake  seat. The throat at 91.5% doesn't leave any fixing room. I pull the seats and replace then and weld below. Going to a 2.12 valve doesn't solve the issue. Most guys don't care and just run them or blend them back.

[dave brode]

Interesting. Thanks.

How do the fluffed up CVO 110 heads compare to the out of the box MVA heads?

How 'bout those oval ports from SE?

What's a 44mm cv carb'd guy to do on the CVO intake port size? Hack an efi intake? S&S custom? [I know that a 44 is a choke on a biggie]

edit: I see that there is a CV51 intake that matches.

Btw, a buddy has an '11 CVO. I'll tell him about the board.

[MCE]

You can get a big honkin Mikuni. (I'm a Mik dealer if you want one)

[prodrag1320]

Interesting. Thanks.

How do the fluffed up CVO 110 heads compare to the out of the box MVA heads?

How 'bout those oval ports from SE?

What's a 44mm cv carb'd guy to do on the CVO intake port size? Hack an efi intake? S&S custom? [I know that a 44 is a choke on a biggie]

edit: I see that there is a CV51 intake that matches.

Btw, a buddy has an '11 CVO. I'll tell him about the board.

S&S has manifolds for big mikuni`s & CV cabs

[HD Street Performance]

Dave
It's a 95" motor. With very little change the stock 110 head works and the carb requirement shouldn't be huge. Please tell us what kind of power and torque you were trying to get to.

[MCE]

A 45 Mikuni is plenty big, even for a very hot 95, and a 42 would be enough for an everyday performance street build.

You don't size a carb like you do a throttle body (its apples and oranges). You're generally better off to error on the smaller side
with carbs (42 in this case), because you have to maintain the air velocity through the venturi in order for it to work. FI doesn't care
what the velocity is through the TB.

if you want to preserve low & mid TQ/throttle response, use a 42. If you're after peak HP, go with a 48 or split the difference with
a 45.

But keep in mind, it's a trade off between throttle response/low end TQ and peak HP. (Throttle response and TQ are the way to go
on a street bike) Drag strip? Different story... Hope that helps. -MC

[dave brode]

Gents,

I'm thinking about a 106" or bigger. No way I'd want to do CVO110 heads on a heavy bike with a 95". I don't really want to go over 4.030", maybe 4.060". I shy away from the 4.125". [had one]. 

Cheapest deal would be the "SE" stock type tapered rod 4.375" crank [$660 or less at discount] for the '99-'06 A engines and 1.082" tall 103 pistons, but that crank scares me.

A JIMs 4.5" flywheel with 7.600" rods [.067" shorter, iirc] works nicely with a 103 piston. Bolt in, although piston to piston should be checked.
Would work with +.030" or + .060/.065" 103 pistons just the same. 

I'm looking at other possibilities too;

A drop in [into a 103] SE 4" cylinder/piston deal would work with a stock rod length 4.375" crank or a Jims 4.5" with 7.600". Not nuts about the thin spigot on those either.

"Bore the cases" 4" cylinders of some sort. I haven't looks far into pistons for that option.

The 4.060" "bigger bore" cylinders from SE look like a deal, longer spigot, safe for the 4.625" SE crank [same as 120R, but for '99-'06A] . I understand that it has 7.575" rods, which work with the common 1.049"/1.050" tall, 4.060"/4.065/4.070" pistons. Fairly easy and not too pricey 120".


The bike has a Bob Wood 44mm cv, and a small primary Fatcat. So, no sense in trying to make a killer combo, since they would be a choke. I have conversion '07 up SE251s in the 95". They would be smallish for a big engine, but a lower rpm tractor would not bother me. I'd be willing to change cams, but I don't really want to change exhaust or carb.


HD street, thanks for the cutback under the seat info on -07s.

Dave
 

[dave brode]

Anyone care to comment on the SE MVA heads? They are in the 2018 catalog. 16925-11

On par with fluffed up 2.125" valved CVO110 heads?

Are they basically a stock 120R head?

Dave

[MCE]

Thanks, Gents!

I'll call you both asap. I wondered if anyone here was on the old HTT board.

The '07/08 touring recallheads seem to be plentiful out there. Fwiw, here is a thread in which a fellow describes how to identify them.  Post #22. 

http://www.v-twinforum.com/forums/twin-cam-engine/162572-110-heads-need-help-2.html

Is the T242 T5 identifying markings cast in, or stamped?

Thanks again.
Dave

Dave,
Welcome to the site.
 
I think you'll like this place.

The nazi gastepo and fake Internet experts are not here. You'll get straight answers w/o
the smart ass BS from the 'broom handlers' that hang out in engine shops to get their
"expertise" (The guys with actual experience are all here).

So ask away! Somebody here will be able to help you.

Cheers,
-Matt



-Matt