63mm TB
 

Got my Experimental Rochester TB machined to 63MM.....blades to be made next

http://i134.photobucket.com/albums/q...f/DSCN5621.jpg

Re: 63mm TB
 

Should get my TB and extra plates back tomorrow!!!

Re: 63mm TB
 

Can't wait to see how it turns out, Lee.

Re: 63mm TB
 

Pretty good fit: Kinsler did the blades for me and fitted them...

http://i134.photobucket.com/albums/q...f/DSCN5643.jpg

Re: 63mm TB
 

Excelent work Lee.
Are the throttle blades off the shelf or custom made?

Re: 63mm TB
 

Q's:


Is there a flow rating for stock?
How 'bout for 63mm?
And with 63mm, where's the bottleneck inflow THEN, with stock non-ported plenum / IH's?

AND...

how well do they hold vac @ idle?

When I re-assembled my TB after top end housecleaning, I could see no light around the blades, BUT, when I had the 2nd TB butterflies blocked with the restrictor gasket, I saw a BIG difference in steadiness of idle RPM, attributable ONLY to air leaking by sec butterflies that LOOKED sealed...

Re: 63mm TB
 

2.501 is the bore and plates are 2.496 with a 10 degree backcut; these are custom

Re: 63mm TB
 

I will need to do some testing on this to see how it idles; Kinsler seemed comfortable with the fit

Re: 63mm TB
 

Everyone might not know this but throttle plates are not round....the centers diameter is smaller and that is the quoted measurement.....

The center diameter is the 2.496....top to bottom its 2.55 to account for the pitch/slant of the blade

Re: 63mm TB
 

the DAG is what seals the plate, I will be coating my TB in a similar product, coating opposing sides so as not to interfere with the blades opening