1641cc VW Bug Engine

i uploaded this to help diagnose why the engine takes a few seconds for the rpms to come back down after a rev. comments are welcome - but since i'm not driving the car until it gets painted, i won't exactly be needing the advise. as for the engine info: 1641cc stock everything else except exhaust, which is the empi GT dual exhaust.

Category:

Autos & Vehicles

Tags:

• volkswagen
• vw
• bug
• beetle
• superbeetle
• ghia
• bus
• 1641

[neoholland]

did you fix this problem mate? what was it??

[super71beetle]

@neoholland I switch out the 34 PICT 3 carburetor for dual dellorto DRLA carburetors. i think the problem was a vacuum leak, and poorly adjusted carburetor. but mostly vacuum leak

[ChuddleBuggy]

It boggled me before too why that manifold would freeze up but it helped make sense when they talk about the damaging effects of lean fuel mixtures in high performance engines. By the way, were you able to figure what;s causing the slow return to idle and the random rev ups?

[super71beetle]

@ChuddleBuggy I'm almost sure it must have been a vacuum leak. I now know how to tune that carb a little better now too.. manuals say to start with the tiny mixture screw in 2-3 turns, but i could not for the life of me get it to idle until i turned it out like 5 turns, then it ran great (except for having the clogged preheat manifolds. The preheat is SUPER important if you run ur engine in temps under "t-shirt and shorts" temp.

[kingpin272000]

sounds to me like yur valves are really loose

[super71beetle]

@kingpin272000 they were... see any of my videos of after i adjusted them?

[wildfyre02]

Looks like the shaft needs to be drilled and bushed the shaft will wear out the shaft hole and allow an air leak that will cause a lean air fuel mixture 

[turneralissa100]

well it appears my motor is blown so now my tax money this year is going to be spent on a new motor do you have any suggestions on where to buy one??

[turneralissa100]

@super71beetle well my 71 superbeetle doesnt have the heater boxes never has since i owned the car the hoses just went down into the shield that has the 2 holes in it and blew the air on the ground they were very old and fallin apart is why i didnt have them on the car . thank you for your time ill write more later heading to work

[super71beetle]

@turneralissa100 actually, if you have heater boxes, you SHOULD keep those hoses there because i guess they keep them from overheating, whether you're running the heater or not. i'm sending a pm so you'll know the differences.. with solutions