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Technical Forums => Twin Cam => Topic started by: guesscrazy on October 30, 2019, 05:36:58 PM

Title: Why put a larger intake valve in SE110 heads?
Post by: guesscrazy on October 30, 2019, 05:36:58 PM
Is it so a multi angle valve seat can be cut? If so why?
Title: Re: Why put a larger intake valve in SE110 heads?
Post by: No Cents on October 30, 2019, 06:30:19 PM
  bigger valve= more air flow   :nix:
Title: Re: Why put a larger intake valve in SE110 heads?
Post by: rbabos on October 31, 2019, 02:22:35 PM
Quote from: guesscrazy on October 30, 2019, 05:36:58 PM
Is it so a multi angle valve seat can be cut? If so why?
As mentioned, more flow. Multi angle would be standard for all of them, including bigger intake valves.
Ron
Title: Re: Why put a larger intake valve in SE110 heads?
Post by: Don D on October 31, 2019, 03:45:05 PM
To create more low lift flow and a more appropriate throat ratio
Title: Re: Why put a larger intake valve in SE110 heads?
Post by: TorQuePimp on November 01, 2019, 05:12:19 AM
More appropriate

Why change valves

Valve shape also critical

Getting away from the backcut oe vales is a very good thing
Title: Re: Why put a larger intake valve in SE110 heads?
Post by: prodrag1320 on November 02, 2019, 04:59:54 AM
Quote from: HD Street Performance on October 31, 2019, 03:45:05 PM
To create more low lift flow and a more appropriate throat ratio


bingo! the throat is too big for the OEM valve (2.080),2.100 works out pretty good.plus your flowing more.a win win
Title: Re: Why put a larger intake valve in SE110 heads?
Post by: Hillside Motorcycle on November 06, 2019, 03:39:25 AM
We use a larger valve with a tulip shape.
Throat diameter is in a better relation to valve size then. 
Title: Re: Why put a larger intake valve in SE110 heads?
Post by: Timinator on November 10, 2019, 09:53:05 AM
I use the MVA intake valve, then cut the spring seat deeper to get the installed spring height back where it needs to be. You can get a five angle seat and great throat shape. You have to be careful to make sure you have enough radial clearance in the valve notch. Not a problem with the Screamin' Eagle "Drop on" big bore 110" and 117" kits, they have bigger diameter notches, as do Wiseco and most other after market pistons. Most stock pistons can be notched enough larger to work. It is something to check before you cut though....  TIMINATOR
Title: Re: Why put a larger intake valve in SE110 heads?
Post by: jsachs1 on November 10, 2019, 02:17:56 PM
Install the 2.120" factory intake valves at 2.005" protrusion, and lay the eyebrow on the stock piston back a small amount. You'll be good to go. :wink:
John
Title: Re: Why put a larger intake valve in SE110 heads?
Post by: Hillside Motorcycle on November 11, 2019, 04:17:12 AM
The depth of the relief is ok, but you need to move the relief outboard.
Piston vise in a vertical mill, makes short/precise work of that.
Title: Re: Why put a larger intake valve in SE110 heads?
Post by: Don D on November 15, 2019, 07:23:45 AM
Got it, built my own.

Title: Re: Why put a larger intake valve in SE110 heads?
Post by: jsachs1 on November 15, 2019, 02:21:09 PM
I built this back in the early 70's. Use it on my lathe with the backing plate, mill  bolted on a an adjustable angle fixture, and rotary table with an adaptor plate. :smiled:
John
Title: Re: Why put a larger intake valve in SE110 heads?
Post by: Hillside Motorcycle on December 04, 2019, 04:33:05 AM
One I purchased here, another I made.
Title: Re: Why put a larger intake valve in SE110 heads?
Post by: TorQuePimp on December 04, 2019, 07:10:16 PM
Quickest to setup I've seen or used
Title: Re: Why put a larger intake valve in SE110 heads?
Post by: mike jesse on December 08, 2019, 09:25:27 PM
Quote from: TorQuePimp on December 04, 2019, 07:10:16 PM
Quickest to setup I've seen or used


Nice! :smiled:

Just goes to show there is more than one way to get the job done.
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