Posted by Erik (IP: 209.179.170.173) on January 31, 2000 at 18:48:04:
I know what you are thinking if you have read my previous posts, damn that guys car is piece of junk.I posted these question last nite I think but the MB was changed so it got lost I guess.Anyhow , my problem is my car doesn't seem to be running at full potential and it gets bad gas milage.My engine now has about 700 miles on it since the rebuild and I would think it should be freeing up a little and getting good milage by now, but it only get on an average 13.5 miles per gallon between city/highway.Now I am not sure why this is happening so please tell me if there is something wrong with my set-up and let me know if my assumption is correct.Rearend is 3.00:1 , C4 trans., 302 (stock bore/stroke), cam: DUR. 260 int. , 270 exh., Valve lift:.424 int., .448 exh., I am running headers and Edlebrock performer intake.Now here is where I think my problem is , I am using a 600 cfm Holley from a 75 F250 that had a 390.The carb. is running really rich and I have leaned it out as much as I can ,but it is still rich(If I lean it too much it won't idle smooth)possibly the jets are too big? I am also babying the car and still no luck with MPG.Also , the carb. throttle shaft doesn't have the pin for the A/T kick down , so I am running it without , any problems with that?And final question , my secondaries don't seem to be opening (at least not when floored from stop, haven't taken speed high enough to see if they open at high speed)what could be causing this?Should I just junk this carb. in favor of an Edlebrock?