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03-06-2014
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#1 |
 
Join Date: Mar 2007
Location: Crystal Lake, IL
Posts: 7,180
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63mm TB
Got my Experimental Rochester TB machined to 63MM.....blades to be made next
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LGAFF 90 #966-150K miles-sold 92 #234-sold 1987 Callaway TT #17 1991 ZR-1 #1359 |
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03-19-2014
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#2 |
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Join Date: Mar 2007
Location: Crystal Lake, IL
Posts: 7,180
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Re: 63mm TB
Should get my TB and extra plates back tomorrow!!!
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LGAFF 90 #966-150K miles-sold 92 #234-sold 1987 Callaway TT #17 1991 ZR-1 #1359 |
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03-20-2014
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#3 |
  
Join Date: Feb 2010
Location: Pendleton, IN
Posts: 3,899
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Re: 63mm TB
Can't wait to see how it turns out, Lee.
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1988 KOH Prototype EX5023 sold 1990 ZR-1 #444 Convertible 1990 ZR-1 Black #966 1991 ZR-1 Quazar Blue #296 1957 Duntov SS Project |
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03-20-2014
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#4 |
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Join Date: Mar 2007
Location: Crystal Lake, IL
Posts: 7,180
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Re: 63mm TB
Pretty good fit: Kinsler did the blades for me and fitted them...
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LGAFF 90 #966-150K miles-sold 92 #234-sold 1987 Callaway TT #17 1991 ZR-1 #1359 |
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03-20-2014
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#5 |
 
Join Date: Apr 2007
Location: Northern VA
Posts: 2,651
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Re: 63mm TB
Excelent work Lee.
Are the throttle blades off the shelf or custom made?
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Phil Wasinger 1994 Torch Red ZR-1 WAZOO Member George Braml Intake |
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03-20-2014
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#6 |
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Join Date: Dec 2012
Location: NC
Posts: 1,783
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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... |
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03-20-2014
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#7 |
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Join Date: Mar 2007
Location: Crystal Lake, IL
Posts: 7,180
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Re: 63mm TB
2.501 is the bore and plates are 2.496 with a 10 degree backcut; these are custom
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LGAFF 90 #966-150K miles-sold 92 #234-sold 1987 Callaway TT #17 1991 ZR-1 #1359 |
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03-20-2014
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#8 |
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Join Date: Mar 2007
Location: Crystal Lake, IL
Posts: 7,180
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Re: 63mm TB
I will need to do some testing on this to see how it idles; Kinsler seemed comfortable with the fit
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LGAFF 90 #966-150K miles-sold 92 #234-sold 1987 Callaway TT #17 1991 ZR-1 #1359 |
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03-20-2014
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#9 |
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Join Date: Mar 2007
Location: Crystal Lake, IL
Posts: 7,180
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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
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LGAFF 90 #966-150K miles-sold 92 #234-sold 1987 Callaway TT #17 1991 ZR-1 #1359 |
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03-20-2014
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#10 |
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Join Date: Mar 2007
Location: Crystal Lake, IL
Posts: 7,180
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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
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LGAFF 90 #966-150K miles-sold 92 #234-sold 1987 Callaway TT #17 1991 ZR-1 #1359 |
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Linear Mode
