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[FLSTFI Dave]

Wow, that looks really good with Stock heads Don.  Shows the 259E needs more compression than the kit gives, seems to like 10.5 or more.

[HD Street Performance]

Same as the old SE257 right at home at 11:1 if the motor is EFI

[WYD OPN]

Heads are stock. But I should point out the latest HD castings are better that the earlier versions. The new ones no longer have cutback behind the intake valve seat rings so there is some meat to work with. These stock heads flow about 285 cfm IME

Wow.  It looks like this combo with head work flowing ~315+cfm could yield 135-square hp/tq!

It might take larger valves to get those numbers, though; yes?

[HUBBARD]

Very nice curve and peak numbers, and 6200rpm rev limit.

Prolly be better to set the chip at 6000.  Talk to your Harley guy.  Just sayin'.  Later--HUBBARD

[WYD OPN]

Prolly be better to set the chip at 6000.  Talk to your Harley guy.  Just sayin'.  Later--HUBBARD

I was thinking:
6200rpm for 1st gear
6100rpm for 2nd/3rd/4th gears
6000rpm for 5th gear
5900rpm for 6th gear

[HD Street Performance]

Wow.  It looks like this combo with head work flowing ~315+cfm could yield 135-square hp/tq!

It might take larger valves to get those numbers, though; yes?

See post 878 on page #59
Those heads flow 330cfm and do have a larger intake only.

[HUBBARD]

I was thinking:
6200rpm for 1st gear
6100rpm for 2nd/3rd/4th gears
6000rpm for 5th gear
5900rpm for 6th gear

Yee-Hi!!  5900 in 6th would be flat carryin' the mail!  I'm sure one of the brains on here could do the calculation as to just how fast that would be!  I ain't had a chance to stretch Ol 'Maybelle out in 6th yet, but I do know, that at 5000 in 5th, she's clockin' 120 MPH!  When it decides to stop rainin' up here, I'll put the Ol' Girl to the test.  Been rainin' all day here today, but startin' to clear up here and there.  Ruined for doin' any ridin', at any rate.  I hope the weather is good for the GTG, later this month.  I'm sure that's gonna' be one of those WFO weekends!  Later--HUBBARD   

[WYD OPN]

See post 878 on page #59
Those heads flow 330cfm and do have a larger intake only.

I see that.  Thanks.  Great numbers.

That build isn't the drop-in 117" with domed-pistons and headwork only.

[WYD OPN]

Yee-Hi!!  5900 in 6th would be flat carryin' the mail!  I'm sure one of the brains on here could do the calculation as to just how fast that would be!  I ain't had a chance to stretch Ol 'Maybelle out in 6th yet, but I do know, that at 5000 in 5th, she's clockin' 120 MPH!  When it decides to stop rainin' up here, I'll put the Ol' Girl to the test.  Been rainin' all day here today, but startin' to clear up here and there.  Ruined for doin' any ridin', at any rate.  I hope the weather is good for the GTG, later this month.  I'm sure that's gonna' be one of those WFO weekends!  Later--HUBBARD   

It would mighty impressive if any new 6sp H-D could hit 5900rpm in 6th.  That would be ~160mph for real.                                                                                                                                                                                                                                                                                     

[FlaHeatWave]

Yee-Hi!!  5900 in 6th would be flat carryin' the mail!  I'm sure one of the brains on here could do the calculation as to just how fast that would be!  I ain't had a chance to stretch Ol 'Maybelle out in 6th yet, but I do know, that at 5000 in 5th, she's clockin' 120 MPH!  When it decides to stop rainin' up here, I'll put the Ol' Girl to the test.  Been rainin' all day here today, but startin' to clear up here and there.  Ruined for doin' any ridin', at any rate.  I hope the weather is good for the GTG, later this month.  I'm sure that's gonna' be one of those WFO weekends!  Later--HUBBARD   

Time to fire up the GPS and see what time it is...

Or you could just get her stretched out and Harry could pull up alongside and tell you how fast you're going

[NJOrangeEagle]

This 117 drop on uses stock heads and a domed piston to get to 10.6, the better way to gain compression vs milling the 110 heads, with 259e cams, boarzilla, SE58 tb.

Sorry for dumb question but why is it better to use domed pistons vs milling the heads?

[GRam]

Being as the stock kit is 9.9, using them variables with my cams (Tman 625) I'll be at 9.5 corrected, and 198 ccp.
All that with a .030 gasket. Having the MVA heads, with their 95cc chamber, is what drops it a shade, but not sure I'd want to go much
higher than 198 on the ccp anyways? Always thought 205 ish was maxed out for a pump gas motor?

I'd rather not shave the MVA heads down, as at some point be nice to re-use in a different combo and not be limited by chamber size, or have them still stock
and be able to sell easier. Just curious how much I'd be giving up not having the corrected compression up a bit higher? Can't be sooooper lots?

[Springer Dan]

Another 117 build. GMR 600 cams and 88cc heads.

[RoadDawg]

Very similar to my build

[HD Street Performance]

Sorry for dumb question but why is it better to use domed pistons vs milling the heads?

Not a dumb question,  but I am just speaking from experience,  many dynos with similar builds.  My comment is also only in the context of builds with the large chamber cvo 110 style head.