63mm TB - Page 2 - ZR-1 Net Registry Forums

XfireZ51 · 03-20-2014

Lee,

Is this on the 90? I recall u had 63s on the 92.

LGAFF · 03-20-2014

Yes doing it on the 90 and the 91 project 368

tpepmeie · 03-20-2014

Quote:

Originally Posted by Schrade

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?

a 427 at 7000 will pull 1" HG vacuum in the manifold with twin 63.5mm blades, and an oversize primary throttle plate. That'll cost a few hp. Smaller motors will be fine with 63mm. Not sure what vacuum a ported 350 would pull with the stock TB, maybe less than an inch?

Paul Workman · 03-21-2014

Lee, you mentioned using a substitute for the DAG compound. What would that be?

LGAFF · 03-21-2014

A dry moly lube

Paul Workman · 03-21-2014

Quote:

Originally Posted by LGAFF

A dry moly lube

I'm intrigued! I'm quite familiar with molybdenum disulphide as well as tungsten disulphide dry lubricants (we coat bullets with the stuff to reduce fouling). Both will adhere well, tho some peening (or "sand blasting" process) may be necessary to get it applied.

However, unless there is some kind of bonding agent, pure moly or tungsten will be removed in the presence of oil...which is likely to be present (to clean moly OR tungsten from my rifle barrels a combination of penetrating oil among other chemicals makes short work of either).

So! I know you do you homework, and a dry lube like Moly makes a lot of sense, but I'm just curious what exactly is this moly stuff is mixed with that is being applied? Shrade's Parkerizing comes to mind as an agent that can be applied, that has some inherent dry lube abilities, and is impervious to (gun) oils.

Then again, I wonder if Jerry's Gaskets has any of the original DAG stuff?

LGAFF · 03-21-2014

The dry moly is commonly used for this application....all I can do is test it.

LGAFF · 03-21-2014

http://www.amperemetal.com/dryfilmtech.html

Schrade · 03-21-2014

Quote:

Originally Posted by LGAFF

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

10 degrees on vertical axis.

It grades to 0' on the horizontal - a compound bevel, not exactly a simple cut.

And the 10' bevel on vertical implies that actual angle of the blades when 'closed', is 80'???

LGAFF · 03-21-2014

I think you meant open, not closed

I believe they mean the plate is cut to for a setting of 10 degrees from vertical when closed

03-20-2014	#11
XfireZ51 Join Date: May 2007 Location: Chicagoland, IL Posts: 9,708	Re: 63mm TB Lee, Is this on the 90? I recall u had 63s on the 92. __________________ [SIGPIC][/SIGPIC]Former Membership Chairman Former ZR-1 Registry - BOD 1972 Corvette 4speed base Coupe SOLD long time ago 1984 Corvette Z-51/4+3 SOLD 1992 Corvette ZR-1 Aqua/Gray #474 SOLD 1992 Corvette ZR-1 Black Rose/Cognac #458 2014 Honda VFR Interceptor DX

03-20-2014	#12
LGAFF Join Date: Mar 2007 Location: Crystal Lake, IL Posts: 7,194	Re: 63mm TB Yes doing it on the 90 and the 91 project 368 __________________ LGAFF 90 #966-150K miles-sold 92 #234-sold 1987 Callaway TT #17 1991 ZR-1 #1359

03-21-2014	#14
Paul Workman Join Date: Nov 2007 Location: Squires (near Ava MO in the Mark Twain N'tl Forest) - Missouri Posts: 6,493	Re: 63mm TB Lee, you mentioned using a substitute for the DAG compound. What would that be? __________________ Good carz, good food, good friendz = the best of timez! 90 #1202 "FBI" top end ported & relieved Cam timing by "Pete the Greek" Sans secondaries Chip & dyno tuning by Haibeck Automotive SW headers, X-pipe, MF muffs Former Secretary, ZR-1 Net Registry

03-21-2014	#15
LGAFF Join Date: Mar 2007 Location: Crystal Lake, IL Posts: 7,194	Re: 63mm TB A dry moly lube __________________ LGAFF 90 #966-150K miles-sold 92 #234-sold 1987 Callaway TT #17 1991 ZR-1 #1359

03-21-2014	#17
LGAFF Join Date: Mar 2007 Location: Crystal Lake, IL Posts: 7,194	Re: 63mm TB The dry moly is commonly used for this application....all I can do is test it. __________________ LGAFF 90 #966-150K miles-sold 92 #234-sold 1987 Callaway TT #17 1991 ZR-1 #1359

03-21-2014	#18
LGAFF Join Date: Mar 2007 Location: Crystal Lake, IL Posts: 7,194	Re: 63mm TB http://www.amperemetal.com/dryfilmtech.html __________________ LGAFF 90 #966-150K miles-sold 92 #234-sold 1987 Callaway TT #17 1991 ZR-1 #1359

03-21-2014	#20
LGAFF Join Date: Mar 2007 Location: Crystal Lake, IL Posts: 7,194	Re: 63mm TB I think you meant open, not closed I believe they mean the plate is cut to for a setting of 10 degrees from vertical when closed __________________ LGAFF 90 #966-150K miles-sold 92 #234-sold 1987 Callaway TT #17 1991 ZR-1 #1359 Last edited by LGAFF; 03-21-2014 at 05:22 PM.