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Old 08-27-2019   #1
LGAFF
 
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Default Mystery Plenum

Bought this on Ebay oddly I have the front piece from when I bought a air horn and throttle body several years ago. Not sure of history or if it will work...
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File Type: jpg plmn2.jpg (149.9 KB, 160 views)
File Type: jpg plnm3.jpg (157.1 KB, 156 views)
File Type: jpg plnm4.jpg (143.5 KB, 180 views)
File Type: jpg plmn6.jpg (149.4 KB, 161 views)
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1987 Callaway TT #17
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Old 08-27-2019   #2
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Default Re: Mystery Plenum

more..
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File Type: jpg plmn7.jpg (212.5 KB, 101 views)
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90 #966-150K miles-sold
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1987 Callaway TT #17
1991 ZR-1 #1359
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Old 08-27-2019   #3
-=Jeff=-
 
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Default Re: Mystery Plenum

if I am looking at it right, it eliminates the IH?

Where is the cover for the outer 'box' areas I see in the pictures?
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Old 08-27-2019   #4
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Default Re: Mystery Plenum

Wont know much until its here, those are the PCV provisons, might have to make something.... and always a chance its a bust.... will see
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90 #966-150K miles-sold
92 #234-sold
1987 Callaway TT #17
1991 ZR-1 #1359
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Old 08-28-2019   #5
-=Jeff=-
 
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Default Re: Mystery Plenum

ah, I thought you had it in your hands
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1990 Corvette ZR-1 #1051
Watson Headers (2" Primary) - Flowmaster Cats - Borla Catback
Late Model IH - Plenum
Coilovers - 4.10s
Custom Interior
NCM Lifetime Member #978
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Old 08-28-2019   #6
LGAFF
 
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Default Re: Mystery Plenum

so oddly I picked this up with a prototype throttle body about 7-8 years ago
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LGAFF
90 #966-150K miles-sold
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1987 Callaway TT #17
1991 ZR-1 #1359
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Old 08-28-2019   #7
LGAFF
 
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Default Re: Mystery Plenum

TB the adapter came with ...
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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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Old 08-28-2019   #8
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Default Re: Mystery Plenum

Quote:
Originally Posted by LGAFF View Post
TB the adapter came with ...
I have a throttle body with the same numbers on it.
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Old 08-28-2019   #9
LGAFF
 
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Default Re: Mystery Plenum

I think they must be early TB (RP) Rochester Products prototypes
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1987 Callaway TT #17
1991 ZR-1 #1359
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Old 08-28-2019   #10
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Default Re: Mystery Plenum

Quote:
Originally Posted by LGAFF View Post
Wont know much until its here, those are the PCV provisons, might have to make something.... and always a chance its a bust.... will see
I have both of them! Machined from billet.
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