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[Unbalanced]

Time for an unbalanced reply

[MCE]

1.) Fixing the Short side radius and bowl, 2.) fixing the throat (bigger valve)  and 3.) the right valve job will get you close to the full potential of that head. The rest is less significant in the grand scheme of things.

just my 2 cents

[Unbalanced]

Matt what about the right spring pressures on the seat and open and zero deck.   Why give up HP to drive un-needed pressures?

[MCE]

Matt what about the right spring pressures on the seat and open and zero deck.   Why give up HP to drive un-needed pressures?

It all adds up.

[DBinSD]

1.) Fixing the Short side radius and bowl, 2.) fixing the throat (bigger valve)  and 3.) the right valve job will get you close to the full potential of that head. The rest is less significant in the grand scheme of things.

just my 2 cents

By doing the above items.

Does it require more changes internally or externally (tranny, clutch etc.) to handle more power? Other than the chest parts of cam, lifters, rods, possibly cam plate and oil pump, headers, exhaust I mentioned earlier?

Additionally, without getting specific. Are we talking under $1k, $1.5k or over $2k for the head work mentioned?

Further, what numbers (TQ/HP) would be ”reasonable” to expect from the above work as an increase from a stock 110 ?

Thanks for your time.
Dan

[Nocvo]

I really appreciate the way you blokes don't mind educating people, obviously most of us are not going to run out and start our own shop but it does help to know what's needed if you want someone to do the work because you know the right questions to ask before you let them at it, you know, just to be sure they know what's what.

[Unbalanced]

By doing the above items.

Does it require more changes internally or externally (tranny, clutch etc.) to handle more power? Other than the chest parts of cam, lifters, rods, possibly cam plate and oil pump, headers, exhaust I mentioned earlier?

Additionally, without getting specific. Are we talking under $1k, $1.5k or over $2k for the head work mentioned?

Further, what numbers (TQ/HP) would be ”reasonable” to expect from the above work as an increase from a stock 110 ?

Thanks for your time.
Dan

Depending on porter the headwork will be in the range $600-$1000

Before I’d buy a clutch I would try an AIM VPC on top of the existing clutch

I’d put in new lifters with a new cam.   The cam chest  will be dependent on wear of the pump or plate or if you have need for more pressure at idle when hot.

Exhaust changes would be recommended to take advantage of the improvements and a throttlebody upgrade to a 58 with 5.3 injectors.

[MCE]

By doing the above items.

Does it require more changes internally or externally (tranny, clutch etc.) to handle more power? Other than the chest parts of cam, lifters, rods, possibly cam plate and oil pump, headers, exhaust I mentioned earlier?

Additionally, without getting specific. Are we talking under $1k, $1.5k or over $2k for the head work mentioned?

Further, what numbers (TQ/HP) would be ”reasonable” to expect from the above work as an increase from a stock 110 ?

Thanks for your time.
Dan

Way under a $K! You'd get 10/10 TQ easy, depending on cam, HP would go way up.

[Nocvo]

Time for an unbalanced reply

Funny buggas lol
On the VPC, how do they go on the hydraulic clutch? I had one on my old Dyna but it was cable, would it make the pull much heavier at high rpm than it is now?

[Unbalanced]

Funny buggas lol
On the VPC, how do they go on the hydraulic clutch? I had one on my old Dyna but it was cable, would it make the pull much heavier at high rpm than it is now?

Mine have never been much different from the pull you have now

[HD Street Performance]

By doing the above items.

Does it require more changes internally or externally (tranny, clutch etc.) to handle more power? Other than the chest parts of cam, lifters, rods, possibly cam plate and oil pump, headers, exhaust I mentioned earlier?

Additionally, without getting specific. Are we talking under $1k, $1.5k or over $2k for the head work mentioned?

Further, what numbers (TQ/HP) would be ”reasonable” to expect from the above work as an increase from a stock 110 ?

Thanks for your time.
Dan

Are we talking under $1k
Yes

[MCE]

Unless you're going to go crazy with motor upgrades, a good stock style clutch will be fine.

[DBinSD]

These replies help considerably, thank you !

If you have more to add, please do.

[HD Street Performance]

Matt what about the right spring pressures on the seat and open and zero deck.   Why give up HP to drive un-needed pressures?

Harry, I have seen some dyno tests done using some extremes and horsepower loss was minimal on the oversprung version. In fact it maintained power better past the peak rpm. Not a suggestion but I found the data interesting but also predicted. The force of compression is the same as the potential energy. I am working on some spring packages that just control the valves with typical hydraulic roller cams we use and the heavy cvo valves. My reason for lightening the force is to save the lifters, rocker bushings, valve stem tips, and rockers. Also lifter bleed off is a concern, which is the noise we hear, lash which is lost lift. With a lower spring rate and seat pressure these cvos get much quieter.

[MCE]

By doing the above items.

Does it require more changes internally or externally (tranny, clutch etc.) to handle more power? Other than the chest parts of cam, lifters, rods, possibly cam plate and oil pump, headers, exhaust I mentioned earlier?

Additionally, without getting specific. Are we talking under $1k, $1.5k or over $2k for the head work mentioned?

Further, what numbers (TQ/HP) would be ”reasonable” to expect from the above work as an increase from a stock 110 ?

Thanks for your time.
Dan

My testing has shown, on average you can expect at least 10/10 more hp/tq. Your results will vary based
on a plethora of factors. Mainly the cams, pipe and tune. But 10/10 is pretty typical if you're just doing head
work.

I did some testing a few years ago along these lines. We started with a couple mildly cammed bikes with stock heads.
Before and after dyno runs with very mild head work (pocket port and valve job) showed pretty significant gains
across the entire RPM range. They gained TQ all over the board and didn't lose anywhere. The bigger the motor, the
bigger the gains. I tested 80ci EVO, 95" TC and a 110 TC. All of them showed very similar gains. The 110 picked up
more than the smaller motors, but the before/after curves all looked similar.