Hi all,
Been away for a while. Busy working on the Corvette... My internet connection has also been down for 2 weeks since the last storm. One good thing about that is I have not wasted time staring at the screen drooling at all nice Corvette builds:lol:
Anyway, had my carburator restored by a guy here in Sweden. He is a master on Rochester quadrajets and well known for his builds for dragrace cars as well as original cars.
Unfortunately my carburator was not the original unit. And, it was not even set up for my 427 engine. It also had alot of wrong parts and incorrectly assembled parts...
This is his findings, translated by me, so please have some mercy on my translation, alot of difficult words for a Swede involved here..
"Application number 7029207 says that it is supposed to be assembled to a 1969 Chevy 325Hp 350Cui V8. It was manufactured day 24 1975 and this makes it a Service Replacement unit for this engine.
During disassembly I noticed following:
The cover over the float housing ventilation incorrectly assembled.
Secondary throttle blades opening too much caused by a faulty linkage.
Dampening spring for the primary needles incorrectly assembled. This prevented the movement of the needles.
A pipe for the secondary acceleration pump was loose at the drivers side.
A clip for the intake valve incorrectly assembled causing a risk for fuel leakage.
Throttle bushings worn.
Main jetting too lean for a big block.
All faults above corrected.
New bushings for throttle shafts assembled.
Main Jetting changed.
Acceleration pump rubber changed to ethanol resistent material.
Recalibrated the Idle circuit for your big block specification."
The Carburator looks almost like new and I´m very pleased to have a Rochester 4MV on my 427 engine.
Here it is on my original aluminum intake, glass blasted.
