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t
My LT-1 had a Holley R6931B 4-barrel carb on it, before I started restoring it. Anybody know anything about this carb? What engine, car manufacturer, etc???
Thanks
Thanks
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a
Don't know yet, but your LT-1 should have either a R4489A-3972123 or a R4555A-3972121
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t
I replaced the R6931B with a R4555A which improved the performance - only to find out it was a CA car, and needed a R4489A. Got the last one on order. Just trying to figure out what to do with the R6931B.
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a
does it look like your LT-1 carb, devorse choke,vac. sec., might be LT-1-302 Z-28 Camaro, any real perf. auto parts can tell you by the #'s out of the Holley cat., keep it for parts.
|UPDATED|1/27/2005 3:09:56 PM (AZT)|/UPDATED|
|UPDATED|1/27/2005 3:09:56 PM (AZT)|/UPDATED|
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A
Former Member
Send PMPortland, TN - USA
Joined: 4/29/2003
Posts: 805
Vette(s): 1972 Coupe
Anything, but Stock and more mods to come!
SSBC Force 10 Brakes, 3.73, TH350, 355 CID, Rack and Pinion, Vette Brakes suspension front and rear.
Well I don't show a R6931B in my Holley Carb List book. Only a 6931A. it says its for a 1975 G.M.T.C. 427 engine. California.
Vehicle Mft Part No 717724
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On my 72 LT1 the original carb is part# 65-6239, a 780 cfm Holley. I got tired on visiting the gas stations and downsized it to a Holley 650cfm part #4777C which runs great
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t
After Shark,
What's "G.M.T.C."?? You say a 427 - could it be a Camaro, as ANIPS said earlier?
What's "G.M.T.C."?? You say a 427 - could it be a Camaro, as ANIPS said earlier?
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A
Former Member
Send PMPortland, TN - USA
Joined: 4/29/2003
Posts: 805
Vette(s): 1972 Coupe
Anything, but Stock and more mods to come!
SSBC Force 10 Brakes, 3.73, TH350, 355 CID, Rack and Pinion, Vette Brakes suspension front and rear.
I really don't know what GMTC stands for. Book was written many years ago and there is nothing in the book that tells. Sorry, but I don't think it would be a camaro. To my knowledge a 427 was never offered in that body.
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t
After Shark,
Any more details on the R6931B? Double feed? Double pumper? 750CFM? 780CFM? 850CFM? Any additional info will help when I decide what to do with it.
Thanks,
Any more details on the R6931B? Double feed? Double pumper? 750CFM? 780CFM? 850CFM? Any additional info will help when I decide what to do with it.
Thanks,
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Lifetime Member
Send PMHot Springs, AR - USA
Joined: 4/24/2004
Posts: 3236
Vette(s): 69 Conv #'s match 427, TKO-600/.64, 3.36HD-Posi, HT, T/T, PS, PB, PW, SP, Leather, Comp XE264HR & Roller Rockers & Lifters, Air-Gap RPM intake, Holley St Av 770 VS, MSD 6AL+Dist+Blaster SS, K&N, Jet-Hot Hooker Side-Pipes, Steeroids, Al Rad, Spal Fans
[QUOTE=After Shark]I really don't know what GMTC stands for. Book was written many years ago and there is nothing in the book that tells. Sorry, but I don't think it would be a camaro. To my knowledge a 427 was never offered in that body.[/QUOTE]
the only 427's used in 1975 to my knowledge were tall deck truck blocks...
maybe gmtc = gm truck cali
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in Forum: C3 HVAC, Fuel, Emissions, and Exhaust
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