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06-17-2014
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#1 |
 
Join Date: Mar 2007
Location: Crystal Lake, IL
Posts: 7,194
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Morrison Dog Bone Throttle Body
Did anyone see this on Marc Haibecks Website?
http://zr1specialist.com/HAT%20Web/f...s/DCP_1509.JPG We encountered this legendary throttle body on the Morrison Number 94 endurance racing car. We were preparing the car for the 2014 vintage racing season. As the name so aptly describes, the section between the OE throttle plates has been removed and a one piece throttle plate has been installed.
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LGAFF 90 #966-150K miles-sold 92 #234-sold 1987 Callaway TT #17 1991 ZR-1 #1359 Last edited by LGAFF; 06-17-2014 at 12:41 AM. |
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06-17-2014
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#2 |
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Join Date: Mar 2007
Location: Crystal Lake, IL
Posts: 7,194
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Re: Morrison Dog Bone Throttle Body
Will be curious to see if my air horn mod nets any HP.....
*AC Bump removed completely *Alt hump reduced *Center gap for airhorn screw reduced and welded in to reduce turbulence  
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LGAFF 90 #966-150K miles-sold 92 #234-sold 1987 Callaway TT #17 1991 ZR-1 #1359 Last edited by LGAFF; 06-17-2014 at 08:02 AM. |
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06-17-2014
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#3 |
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Join Date: May 2007
Location: Chicagoland, IL
Posts: 9,708
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Re: Morrison Dog Bone Throttle Body
My guess is that it won't. As you know, I have 63mm TB on my 5.7. A restriction in the airflow will show up as a drop in MAP at WOT as RPM goes up. With the dyno runs I have done, I don't see that happening, not only w stock air horn, but with air bridge and cleaner assembly attached.
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[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 |
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06-17-2014
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#4 |
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Join Date: Mar 2007
Location: Crystal Lake, IL
Posts: 7,194
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Re: Morrison Dog Bone Throttle Body
What is the MAP Reading at WOT?
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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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06-17-2014
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#5 |
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Join Date: Mar 2007
Location: Crystal Lake, IL
Posts: 7,194
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Re: Morrison Dog Bone Throttle Body
Mercruiser(Scott Skinner) found the Air Horn to be a restriction in actual testing; Marc seemed to think the same. We will see
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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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06-17-2014
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#6 | |
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Join Date: May 2007
Location: Chicagoland, IL
Posts: 9,708
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Re: Morrison Dog Bone Throttle Body
Quote:
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[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 |
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06-17-2014
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#7 |
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Join Date: Mar 2007
Location: Crystal Lake, IL
Posts: 7,194
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Re: Morrison Dog Bone Throttle Body
I would have to go back and ask, they did progressive testing on an engine starting minor mods and documenting each change and variance. I was surprised when he mentioned cleaning up the airhorn was worth about 5hp.
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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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06-18-2014
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#8 |
 Join Date: Jul 2005
Location: Jupiter, Fl.
Posts: 815
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Re: Morrison Dog Bone Throttle Body
That dog bone is cool. And this was made for a stock displacement ZR-1?
Are the openings enlarged also, or stock diameter? It would be interesting, (and not too difficult), to dyno that in comparison to a stocker, and one that was overbored. Does Marc have a theory as to what the ideal cfm a, (350c.i. LT5), throttle body should pass? Hey Marc ! 
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06-18-2014
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#9 |
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Join Date: Mar 2007
Location: Crystal Lake, IL
Posts: 7,194
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Re: Morrison Dog Bone Throttle Body
Brett Henderson might know about this too.....
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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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06-18-2014
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#10 |
  
Join Date: Feb 2010
Location: Pendleton, IN
Posts: 3,904
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Re: Morrison Dog Bone Throttle Body
The 94 SankeSkinner is not cammed. It may or may not be ported. It sounds stock and Robert stated that it didn't feel modded.
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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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