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02-08-2008
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#1 |
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Join Date: May 2007
Location: Chicagoland, IL
Posts: 9,708
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63mm TB
I am moving forward on porting the plenum and IHs. I also have a 63mm TB. Haven't checked yet but is it necessary to port the TB openings on the plenum to match the 63mm TB or are they large enough already?
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02-08-2008
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#2 |
 
Join Date: Nov 2006
Location: dayton,ohio
Posts: 425
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Re: 63mm TB
The plenum port on mine was 1/16 inch or so smaller than the 63mm, so it got match ported to the tb. gasket doesn't match either.
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[FONT=Comic Sans MS][COLOR=red]"I wanna go fast!!"[/COLOR][/FONT] [FONT=Comic Sans MS][COLOR=#ff0000]-- Ricky Bobby[/COLOR][/FONT] |
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02-08-2008
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#3 |
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Join Date: May 2007
Location: Chicagoland, IL
Posts: 9,708
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Re: 63mm TB
Thanks!
LGaff, I know you have a 63mm on yours. Can you tell if it is port matched or left alone? Is the port opening smaller than the TB? |
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02-08-2008
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#4 |
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Join Date: Nov 2006
Location: dayton,ohio
Posts: 425
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Re: 63mm TB
I matched the ports to the TB and also the air horn needs opened up to match also.
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[FONT=Comic Sans MS][COLOR=red]"I wanna go fast!!"[/COLOR][/FONT] [FONT=Comic Sans MS][COLOR=#ff0000]-- Ricky Bobby[/COLOR][/FONT] |
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02-08-2008
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#5 |
Join Date: Jul 2007
Location: Las Vegas
Posts: 298
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Re: 63mm TB
Man, I'm looking at the plenum and those secondary holes are HUGE! What is the difference going to 63MM?
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1990 Grey/Black Too many for the sig. |
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02-09-2008
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#6 |
 
Join Date: Jul 2004
Location: Kalamazoo MI
Posts: 1,753
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Re: 63mm TB
It should be port matched on the plenum to the throttle body I mean whats the point if you dont port match them together?
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JOHNNY P Currently own 90 ZR-1 #845 DRM 500 engine package 90 #226 Parts car Hit me up if you need anything. |
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02-09-2008
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#7 | |
Join Date: May 2005
Location: Leesburg, VA
Posts: 2,713
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Re: 63mm TB
Quote:
As an aside, two 63mm TB's and the single 23mm would have the same area as a 92mm single TB.
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Bob Saveland Former owner of #2517 [IMG]http://a.random-image.net/aurora40/vette.jpg[/img] Last edited by Aurora40; 02-09-2008 at 12:44 PM. |
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02-09-2008
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#8 |
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Join Date: Jan 2004
Location: Portland, OR
Posts: 1,057
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Re: 63mm TB
The stock plenum throttle bores are 59.5mm in diameter. You should open them up to 63mm otherwise your wasting your money on the larger throttle body.
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Robert ZR-1 Net Registry Oregon State Director 91 ZR-1 #431 Black/Black LPE 368 |
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02-09-2008
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#9 |
 
Join Date: Mar 2007
Location: Crystal Lake, IL
Posts: 7,194
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Re: 63mm TB
I just checked my car, it has the 415DRM package....
TB measures to 63mm Intake opening 60mmm??????????????????????? Good catch Dominic! I assumed they would have opened it up since the intake was extrude honed, etc. I'll put that on the list. LGAFF 92 ZR1 #234 Last edited by LGAFF; 02-09-2008 at 10:18 PM. |
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02-09-2008
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#10 |
Join Date: Oct 2005
Location: Candy Apple...yUmMy
Posts: 1,137
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Re: 63mm TB
Get in touch with Greg V. in Oklahoma.....he did nj's last year and was the largest one has has ported to date! It's so nice lookin it was a shame to mount on the car instead of using it for wall art!
  ....and the finished results...... 
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