R W Burgess Posted July 14, 2007 Share Posted July 14, 2007 Years ago, I put a later model 350 engine in a 1984 Chevy Caprice with the only problem being the computer system which we did away with when we changed to a carburator. I'm now wondering about these later Caprices with the fuel pump in the fuel tank. Is this (high pressure??) pump compatable with a carburator or will I need a pressure regulator to keep from over running the carb floats? Or worse yet, will I have to take the pump out of the tank and replace with an engine mounted pump?Wayne Link to comment Share on other sites More sharing options...
Stan Kulikowski Posted July 15, 2007 Share Posted July 15, 2007 I would suspect that you would need a regulator, assuming that the Caprice recieving the engine was originally equipped with a fuel injected engine. A mechanical fuel pump supplies fuel at about 5-8 psi while fuel injectors tend to need a much higher pressure.One other option would be to disconnect the in-tank pump and mount a Holley Red electric fuel pump near the tank. I use this set up on my hot-rod 70 Monte with a carb and it works just fine. Link to comment Share on other sites More sharing options...
R W Burgess Posted July 15, 2007 Author Share Posted July 15, 2007 Thanks Iceman. I'm assuming then, that with the in-tank pump disconnected, there's no problem with fuel being "sucked" through the original pump?Wayne Link to comment Share on other sites More sharing options...
Stan Kulikowski Posted July 19, 2007 Share Posted July 19, 2007 You know Wayne ... I didn't think about that. My gut tells me there wouldn't be a problem since the fuel would flow through the pump if it were running. My only other thought is how efficiently would the Holley pump suck the fuel from the tank through the in-tank pump? I'll ask around and see if I can get an answer. Link to comment Share on other sites More sharing options...
R W Burgess Posted July 19, 2007 Author Share Posted July 19, 2007 Thanks Stan, but my mechinac called yesterday. One of trottle body injectors had stuck or something and blew a fuse. He replaced the fuse and got her running, but only on about 4 cylinders. He then ordered a new rebuild kit for the unit at about $350.00. Umm, would have bought a nice Holley, but who's got the time. At any rate, I guess she'll be on the road by early next week.You know, I'm not used to anything running like that. It sounded just like a "fire" problem to me. Carburators don't do that kind of stuff.Wayne Link to comment Share on other sites More sharing options...
Recommended Posts
Create an account or sign in to comment
You need to be a member in order to leave a comment
Create an account
Sign up for a new account in our community. It's easy!
Register a new accountSign in
Already have an account? Sign in here.
Sign In Now