63mm TB - ZR-1 Net Registry Forums

LGAFF · 03-06-2014

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

LGAFF · 03-20-2014

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

Blue Flame Restorations · 03-20-2014

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

LGAFF · 03-20-2014

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

Jagdpanzer · 03-20-2014

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

Schrade · 03-20-2014

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...

LGAFF · 03-20-2014

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

LGAFF · 03-20-2014

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

LGAFF · 03-20-2014

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

LGAFF · 03-20-2014

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

03-06-2014	#1
LGAFF Join Date: Mar 2007 Location: Crystal Lake, IL Posts: 7,194	63mm TB Got my Experimental Rochester TB machined to 63MM.....blades to be made next __________________ LGAFF 90 #966-150K miles-sold 92 #234-sold 1987 Callaway TT #17 1991 ZR-1 #1359

03-20-2014	#2
LGAFF Join Date: Mar 2007 Location: Crystal Lake, IL Posts: 7,194	Re: 63mm TB Should get my TB and extra plates back tomorrow!!! __________________ LGAFF 90 #966-150K miles-sold 92 #234-sold 1987 Callaway TT #17 1991 ZR-1 #1359

03-20-2014	#3
Blue Flame Restorations Join Date: Feb 2010 Location: Pendleton, IN Posts: 3,904	Re: 63mm TB Can't wait to see how it turns out, Lee. __________________ 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

03-20-2014	#4
LGAFF Join Date: Mar 2007 Location: Crystal Lake, IL Posts: 7,194	Re: 63mm TB Pretty good fit: Kinsler did the blades for me and fitted them... __________________ LGAFF 90 #966-150K miles-sold 92 #234-sold 1987 Callaway TT #17 1991 ZR-1 #1359

03-20-2014	#5
Jagdpanzer Join Date: Apr 2007 Location: Northern VA Posts: 2,661	Re: 63mm TB Excelent work Lee. Are the throttle blades off the shelf or custom made? __________________ Phil Wasinger 1994 Torch Red ZR-1 WAZOO Member George Braml Intake

03-20-2014	#6
Schrade Join Date: Dec 2012 Location: NC Posts: 1,786	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... __________________ I'm getting my snappics / threads removed blindly as fast as I can, to get in compliance with copyright / license TOS on the boards here (lots of FSM pages and other copyright / license violations on my part; sorry guys). And thanks to all the guys who didn't whine when I posted those FSM copyrighted / licensed stuff in my threads... ( :thumbsup: [b]and to think I complied with a mod's request to delete a pic of him in a Challenge Car in NCM Museum, so he wouldn't get in hot water)[/b] Thanks to several guys here for sending parts FREE; BearlyFlying, WeGone, Geezer, GoldCylon, and more there, TonyD, mike100, fletchusmc... 1990 #2794; 4L60e Stage V by RPM Transmission, TCI Dedicated TCM, OBX Stainless, Power Effects 3" [IMG]https://lh5.googleusercontent.com/-GHpfzty7DVU/UQn-0Ru2xAI/AAAAAAAAA14/08mz1p4QLD4/s445/Screenshot-5.png[/IMG]

03-20-2014	#7
LGAFF Join Date: Mar 2007 Location: Crystal Lake, IL Posts: 7,194	Re: 63mm TB 2.501 is the bore and plates are 2.496 with a 10 degree backcut; these are custom __________________ LGAFF 90 #966-150K miles-sold 92 #234-sold 1987 Callaway TT #17 1991 ZR-1 #1359

03-20-2014	#8
LGAFF Join Date: Mar 2007 Location: Crystal Lake, IL Posts: 7,194	Re: 63mm TB I will need to do some testing on this to see how it idles; Kinsler seemed comfortable with the fit __________________ LGAFF 90 #966-150K miles-sold 92 #234-sold 1987 Callaway TT #17 1991 ZR-1 #1359

03-20-2014	#9
LGAFF Join Date: Mar 2007 Location: Crystal Lake, IL Posts: 7,194	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 __________________ LGAFF 90 #966-150K miles-sold 92 #234-sold 1987 Callaway TT #17 1991 ZR-1 #1359

03-20-2014	#10
LGAFF Join Date: Mar 2007 Location: Crystal Lake, IL Posts: 7,194	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 __________________ LGAFF 90 #966-150K miles-sold 92 #234-sold 1987 Callaway TT #17 1991 ZR-1 #1359