I found an Edelbrock 7176 Performer RPM / not air gap online for $229.95. I have no hood scoop on my car so I need everything to fit with stock air cleaner and hood.Whats a good size Holley to use?
Very good advice!Check the timing before you start buying any parts.
Once you get the timing set properly, then you can start looking elsewhere if you are still experiencing problems.
A '69 340 should have plenty of power to keep you happy.
The LD4B is not a bad manifold for a 340 exhaling through stock exhaust manifolds.
Take it one step at a time.
Intake is not the LD340.. Its LD4B ,My error. Oh, Cam should be stock as far as I know . Doesnt look like anyone threw money at this engine ... Guys give me a good intake /carb sugestion. Would an Edelbrock performer RPM with a Holley 650dp/ 740? be ok ? You guys are great :cheers:
oh here is another clue/simptom.When I went to adjust the air bleed screws to smooth out each side of the engine , turning the screws in didnt seem to get a responce/rough like it should have. I was trying to turn them in then back out to get smoothest idle . didnt use a vac gauge though .
I'm running a 750 speed demon with the RPM and cast x heads. It's not too much carb. Remember the thermoquad was an 850 stock.
Actually there were two sizes of thermoquads used on production cars. The smaller one with 1 3/8" primaries is roughly 800 cfm, and the bigger one with 1 1/2" primaries is about 850 cfm. 340s and 400's had either one depending on options. All 440's had the bigger one.
oh here is another clue/simptom.When I went to adjust the air bleed screws to smooth out each side of the engine , turning the screws in didnt seem to get a responce/rough like it should have. I was trying to turn them in then back out to get smoothest idle . didnt use a vac gauge though .
The engine has 60k on it doesnt seem to have any rod knocks or ticking sounds at all and doesnt smoke . I will take it slowly as suggested. Ill check the timing and check for vacume leaks with wd 40 spray.Ill also place a vacume gauge on the engine and check the reading.
Whats a good size Holley to use?
You need to tune it, as suggested. I would get the carb rebuild kit first. Carefully rebuild it or have it rebuilt. It may be very lean due to age and crud in the air bleeds. Also, the advance curve of the distributor needs to be tailored to the fuel we have today. That means more than sticking the Pertronix pickup assembly. It means setting the advance curve for best performance without pinging. Also, on the trans.. it is a surefire way to kill the transmission by driving it with a misadjusted kickdown linkage and manually shifting it. The reason it doesnt work is the aftermarket intake. So You may need to do a little tweaking to get it to work. It sounds like a simple case of lack of maintenance.