Holley’s three-barrel carburetor had a small window in history, where it was one of the meanest street carburetors you could get. Today, information on them is hard to come by.
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I loved that carburetor!! I rebuilt a 1970 GS 455 in 1986 w/ a .030 over 10 to 1 compression forged pistons w/ Offenhauser 360 aluminium intake an the 3150 Holley. I still have the original engine today on an engine stand in my garage.
Enjoyed your article on the 950 & 1050's. My brother and I had a 1050 on our LS6 in a 67' Chevelle SS. Drove it mostly on the street. Yes, it bogged momentarily sometimes but it was easy to work on. We put a 780 on the LS6 years later. Still have the LS6 on a cradle and the 1050 in a box. The Chevelle now has it's original L-35 and drivetrain back in the car. The car has been in our family for 50 years.
Many years ago I ran a 950 3bbl on my 71 Hondo V-drive flat/427 Ford FE. Great carb for that application. The engine would spin 7100 rpm with no flatspots, hesitations, bogs, etc. I have since acquired 2 more, another 950 and a 1050. Rebuild kits are no longer available but with some creative handiwork a 4150 kit can be made to work as well as the larger secondary diaphragm for a replacement.
I don't have much knowledge of the 3 barrel, but I bought a 4160 in 1991, and put it on my 307 Chevy with a performer manifold. Well over 100k miles later, that 4160 still performs great with no problems ever. Great throttle response. What a great carburetor the 4160!
I've seen and O/Hed some Holleys in my time but never have I heard of a 3150 until now.
When I saw the pic of that giant oval rear throttle I thought of my 289 torquer at the same time. I can understand the lean spots from the throttle opening to quick and I'm certain Holley must have offered a variety of diaphragm springs to slow the open time