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Old 13-01-09, 15:54
Kenny Kenny is offline
SemiPro XT-Moto
 
Join Date: Aug 2008
Location: Floyd, VA
Posts: 37
Kenny is on a distinguished road
Quote:
Originally Posted by Kev View Post
Nice work Kenny, nice bottom end HP & Torque & a good flat spreed of HP across the top end.

Do the rocker arms need to be machined to clear the cam lobes with your cam?
Hi Kev!
Yes they do. I am having a jig built to do this on the vertical mill at a low cost to the customer. I am steadily working to get the cost of the components down as much as possible.


Quote:
Originally Posted by Freez View Post
Hi Kenny.

Sorry, can I go back to the 1st dyno runs.

I am getting confused with the dyno runs. Can you explain to me what parts go where and which runs goes with what parts?
Hi Freez! The engine specs are:

Blue= Reference line, stock engine equipped with Barker duals, Trinity fuel controller, and Velocity intake kit (tube). This engine was not tested the same day, and is only there to represent the power curve without the HC III

Gold= 11:1 piston, HC III, PC III controller, Dynatek ignition controller, HC III, shortened velocity intake and Barker duals.

Red= Same as gold with a head change only.

The second dyno chart is the same engine a couple of months later with the cam being the only change.

As an interesting side note; The Velocity intake tube (full length) that was used for the first test made big torque. When the intake tube was shortened a total of 3" (used for all but the stock engine test), There was a very pronounced "shelf" of power gained from 4800-8200 RPM. Subsequent testing on all different combos and sizes of builds have shown this intake to have the exact same "sweet spot". The full length intake would have shown more torque, with less overrev. I will post that test if I can find it.