I have been switching my 68 427/400HP over from 3x2 to a 69 390 hp intake topped with the correct (reman) QJET .. under the carb goes a gasket and a "metal" shim (I quess that is what it is called) .. which goes down first (closest to intake) gasket or metal shim?? GEE i am almost embarrassed to even ask .. but has been years since I have worked on this thing and I am still trying to locate all my reference manuals
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Re: OK brain dead on carb install
Dale, The gasket first then the metal shim on top of gasket.New England chapter member, 63 Convert. 327/340- Chapter/Regional/national Top Flight, 72 coupe- chapter and regional Top Flight. -
Re: OK brain dead on carb install
Dale -
The gasket goes on the intake first, then the stainless baffle, then the carburetor.Comment
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Re: OK brain dead on carb install
thanks guys ,,, sorry for not being up to speed yet .. I have been around mid-years then later C3's for 35 years ,, with a major time void over the last 7 years .. I am sure I will have more questions until I get my 68 on the roadComment
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Re: OK brain dead on carb install
Sorry to drift from your post but would you be the previous owner of a 25,000 mile 71bb Brands Hatch green car?Comment
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Re: OK brain dead on carb install
yes, I owned one a few years ago .... I think it went to Michigan ??? any questions about it?Comment
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Re: OK brain dead on carb install
Jim and Dale------
Yes, I HIGHLY RECOMMEND plugging the holes at the end of the carburetor flange "heat slot" so as to eliminate this feature (which GM also eliminated after 1969). With the heat slot eliminated the stainless steel baffle becomes almost irrelevant but I would still install it---it can't hurt anything.In Appreciation of John HinckleyComment
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Re: OK brain dead on carb install
A story from the original owner of my 71bb...........Back in October of 1970 he along with his best buddy walked into their local Chevrolet dealer in Minneota MN. Both ordered new Corvettes (our cars), both with big blocks, mine is a four speed I was told your car had an automatic(?). This was the same time the strike occurred at GM which pushed the delivery into 1971. My car was built on Feb. 2,1971 vin.08555, how close was yours? Another problem along the way slowed my cars delivery (I believe front end paint blend), which slowed mine even longer, which put your car into the hands of the original owners first. Over the next few month both drove their cars, but my guy was forced to sell the car in about a year from delivery due to a baby on the way. Which happens to be the way I found my guy. The son still lives in the same town. It's been years since I spoke with my original owner but he was still driving Corvettes!
I do remember seeing your car for sale and thought how nice it would be to see them together again but perhaps another day. Also, I recall all the original paperwork you had for the car, I tried to save a copy but lost it due to a computer loss.
Nice to make the connection!
Continue of line/PM
Regards,Comment
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Re: OK brain dead on carb install
what is the best way to block the heat slot? the intake is already on the motor so tapping is out of the question. I also found out that I need new fuel lines now too (more $$$) , but they look like they come in two pieces .. I assume one from the fuel pump to (maybe a fuel filter) and the from the fuel filter to the carb? anything else that I need to get to be able to get from the fuel pump to the carb? any pictures would help TOO ,,, making progress ,, hope to fire this thing this weekend ..Comment
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Re: OK brain dead on carb install
Dale------
You can plug the heat slot end holes using drive plugs (cup-like miniature freeze plugs). Most good auto parts stores have these. I've forgotten the size. Just measure the holes and get the plugs of the proper size. I think they're like 3/8" or close to that.
You do need a new fuel line from the fuel pump to the carb if you want a stock-appearing installation. This will be a three part system----a lower fuel line from the pump, GF-432 filter, and line from filter to the carb. You'll also need a bracket which fastens the filter to the AIR pump bracket.In Appreciation of John HinckleyComment
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Re: OK brain dead on carb install- more help needed
is the fuel filter something that I can get at the local parts store? what I have seen so does NOT appear to be the same as the one from paragon? also there is a second connecting point on the fuel filter .. looks like a hose connection point where does that go to?Comment
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Re: OK brain dead on carb install- more help needed
Dale-----
The most recent GF-432, if it's even still available, at all, was not configured like the originals. It's larger in OD and will not fit in an original or reproduction filter bracket. The body is also stainless steel and sealed differently than the original.
The nipple on the top of the filter is for the fuel return line. All 1968-69 Corvettes with Q-Jet carbs used a 1/4" fuel return line to the top passenger side of the fuel tank. The line ran parallel and adjoining the fuel supply line.In Appreciation of John HinckleyComment
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Re: OK brain dead on carb install
Has anyone with the C-3 series Vettes having fuel return lines had an excessive bypass problem??
I had not had experience with these emission type controls, i.e. charcoal canisters and bypass fuel return lines, etc. as I was out of the country during that era. My first experience came with a new 83 Camaro Z-28 H.O.. Upon hard acceleration, the thing would fall flat as it seemed to be running out of fuel. I checked with the dealer and they knew nothing. In trouble shooting the problem, I used a fuel hose from the pump to the carb with a clear filter and discovered the line would run dry during WOT bursts. I traced the system lines and figured out that too much fuel was by-passing in the pump back to the tank. To overcome or limit this, I inserted a restrictor using a Holley main jet and threaded it into the return fuel hose far enough to allow connection back on the pump fitting. It worked like a champ.
I recalled this just this past week as I was looking for a good section of hose to replace a piece on my lawn mower. The piece I found in my parts bin was about 1-1/2" too long. When I cut it down - there was that jet inside some 27 years later.
Several months after I had made my modification, I read about the same fix in a magazine. Darn!, I could have written the article.
Stu FoxComment
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