Joined: Sat Aug 19 2006, 05:03PM
Location: Ontario, Canada
Posts: 2919
Not meaning to throw cold water on your design project, but wouldn't it be easier and cheaper to just buy a stock mechanical pump instead, and just replace that?
Also, are you installing the regulator because your carb is flooding at idle, ie: pressure is higher than what the needle and seat in the carb can hold back?
more or less, yes. it floods at idle and wont stay running at idle when warmed up unless its tuned out beyond where it should be. idle is 8.5 psi according to my little mr gasket inline gauge. cruising down 288 is fine, coming to a stop sign is not.
and because the typical I assume GM style dual feed steel line I had lying around and put to use was aggravating, couldnt exit forward because of my coil, and I wasnt in the mood at the time to relocate the coil because it was in a convenient location for me and I already had one of the little 4bbl position plates for original chrysler intakes to bolt it up to. I originally had my line running across the inner well and back behind the carb, which is stupid... seen here.
by all means, Im not in love with anything Ive done so far, and I can just use the AN fittings on a toyota truck im putting together thatll need the regulator to run a weber around 3psi with a carter e-pump, so I wont be heartbroken if I dont use them. truth be told, I think they are tacky as all hell and like someone pointed out earlier, yea Im going for a nascar vibe, but not a modern vibe, a 60s vibe. they didnt use that AN mess back then. it just seemed most appropriate at the time, and truth be told, its a very plain looking pump (yes I know looks are nothing) and I didnt think Id have any success getting less pressure from any other, simply because Ive never had another. but from what I hear, maybe stock stuff pumps out about 5 or 6psi. I am open to any and all suggestions.
I want proper pressure, proper idle, a decent appearance, and a clean design for a dual feed holley 750. im making my best attempt to mimic 60s nascar stuff for the sake of fun, but a dual feed already throws that out the window, and theres a point where you cant do any more to make a 383 look like a 426 bath tub, and thats just life! im on the verge of getting some steel line and bringing my brake line tube bender home and making steel line to come from the pump to a splitter, like a cross ram wedge motor.
I dont follow what youre asking. the regulator is after the pump, and before the carb. its not a bypass regulator, there is no return line. holley 12-803. one in, two out. I assume it is just a checkball/diaphragm setup limiting pressure. above picture is last week. as of today, this is what Im looking at.
I am putting my carter pump in today, and it makes sense to check the push rod to make sure ive got the right one. whats the stock length suppose to be?
I hadnt thought about it but I dont suppose this problem could have been from the cam I have in it? its the 383 hp cam, 268/284 and 450/458..
well mines stock and looks quite healthy aside from a very small wear spot from the pump arm. I got a standard carter pump and a few 5/16 hard lines and a tee to split them up to the individual bowls. im going to try and get to oreilly and get the wix 33032 filters for each line and essentially plumb it like a street hemi. I have about 120 bucks worth of holley regulator and various AN fittings.....but gotta learn stuff for yourself I guess! maybe one day I will have a use for them.....nitrous plate....