Thumpin455
Member
- Joined
- May 19, 2012
- Messages
- 15
- Reaction score
- 0
- Location
- Marquette, Michigan
- My Car
- 71 sportsroof, 351C 2V, FMX, 3.50 9" Getting a 72 351C HO
67 Cougar A code with a 351C 2v.
65-70-72 GTO along with a dozen other Pontiacs.
I completely forgot that Ford put Qjets on Clevelands. I know about the 429 getting them, that is well known. It just so happens that the Qjet is my favorite carb, I run them on my Pontiac engines and modify them to run E85. So far there are only two of us modifying them for E85, but I have showed others how to do it, and it isnt hard. I rebuild them often and they are easy to work with once you know how they work. A bit more complicated than a Holley, but that means they are more adjustable at part throttle.
The idle down tubes get clogged after the carb sits a while with gas in it. They varnish up and they only have a .038"-.044" hole. Clean those down tubes, install throttle shaft bushings, set the float right, play with the idle screw passages and you are half way to having it set up to run again with todays gas. There are other things that can get plugged, but its usually a simple matter of taking it all apart and running a small wire through the passages.
If you want to do it yourself, spend the $30 and get Cliff Ruggles book on rebuilding and modifying them. http://www.cliffshighperformance.com/buy_book_2.html Otherwise you can send it to me, I will go through it, make it run on one of my Pontiacs with similar vacuum specs and send it back. Its fun for me to work them over, so all I need is the kit to rebuild it and some return postage.
That rash of people having issues with ethanol in the fuel was more a problem with the sludge being cleaned out of the tank, lines, and pump. Ethanol will wipe the varnish and crud right out of your fuel system leaving it squeaky clean. So you need to change the filter and flush the lines so it doesnt get stuck in the carb.
I've been running ethanol in my old cars for a long time now, 10% since the late 80s, and E85 in a couple of them since 2007, all with stock fuel systems. The only mods needed for carbed cars to run E85 is opening the carb passages a bit. If you have to run race gas due to compression, such as in the 71 BOSS 351 or the 429, its easy to modify the carb to run E85 and not have a problem with ping or detonation ever again. It doesnt hurt Qjets a bit, Ive had one soaking in a gallon of E85 since 2006, and properly set up they run great on the stuff. The other guy building Qjets for E85 gets between 16 and 19mpg with a 455 in a 79 Trans Am, its hard for some people to get that on gas.
The idle down tubes get clogged after the carb sits a while with gas in it. They varnish up and they only have a .038"-.044" hole. Clean those down tubes, install throttle shaft bushings, set the float right, play with the idle screw passages and you are half way to having it set up to run again with todays gas. There are other things that can get plugged, but its usually a simple matter of taking it all apart and running a small wire through the passages.
If you want to do it yourself, spend the $30 and get Cliff Ruggles book on rebuilding and modifying them. http://www.cliffshighperformance.com/buy_book_2.html Otherwise you can send it to me, I will go through it, make it run on one of my Pontiacs with similar vacuum specs and send it back. Its fun for me to work them over, so all I need is the kit to rebuild it and some return postage.
That rash of people having issues with ethanol in the fuel was more a problem with the sludge being cleaned out of the tank, lines, and pump. Ethanol will wipe the varnish and crud right out of your fuel system leaving it squeaky clean. So you need to change the filter and flush the lines so it doesnt get stuck in the carb.
I've been running ethanol in my old cars for a long time now, 10% since the late 80s, and E85 in a couple of them since 2007, all with stock fuel systems. The only mods needed for carbed cars to run E85 is opening the carb passages a bit. If you have to run race gas due to compression, such as in the 71 BOSS 351 or the 429, its easy to modify the carb to run E85 and not have a problem with ping or detonation ever again. It doesnt hurt Qjets a bit, Ive had one soaking in a gallon of E85 since 2006, and properly set up they run great on the stuff. The other guy building Qjets for E85 gets between 16 and 19mpg with a 455 in a 79 Trans Am, its hard for some people to get that on gas.