roarinrotaryrx7

iTrader: (8)

It's been about of month of searching previous threads and trial and error but now it's time I turn to creating my own thread in the hopes of resolving a few issues I've been having with my Holley 465 setup. Carb is a RB 465 stockport on a 12A stockport. Headers are installed. I rebuilt the carb and replaced everything to spec according to the RB stockport 465 specs. Jets are 49's, carter 8psi fuel pump running through a regulator set at 6psi. Everything is hooked up correctly (vacuum line to dizzy, brake booster hose off intake, crankcase vent to RB power pulse intake canister, OMP arm and lines hooked up and working. So here's the problem now. Whenever I try to start the car it floods the engine. If I DO manage to get it going it runs terribly rich and sounds like only one rotor is firing. Plugs are black and/or soaked. The motor isn't blown, I JUST put the carb on and before that I drove everyday with the stock Nikki. It'll sound like one rotor is firing then all of a sudden both are and vice versa. Out of nowhere. Timing is set to stock timing. If I just sit and crank the car without giving the gas pedal a pump or two it just turns over and doesn't start. The choke is functioning properly, so I know it's not that. I've managed to get the car warmed up and idling at 800 rpm and it seems like everything is good, throttle rev is very responsive, no stumbling or lag when i give it a quick rev, the exhaust isn't smokey. I managed to take it for a quick run down the street and it had NO high end power whatsoever. I know this is probably a float issue but I just wanted to see what peoples thoughts were. I'll also note at one point it looked like fuel was dripping from the bottom of the header where the flange is. But that stopped after a bit of playing with the idle mixture.

t_g_farrell

iTrader: (1)

If fuel is leaking near or on the headers get it fixed NOW! Otherwise your next post will be about
burning up your car.

Whats the history on the carb? Are you sure its setup the way RB intends for a stock port. Could
be something done during the rebuild. I would pull it apart and see if anything is amiss.

Not a holley guy but I'm sure some will chime in sometime today.

84stock

iTrader: (5)

Adjust the floats first.

Manual or electric choke??

RotorMotorDriver

iTrader: (1)

You definitely need to set the floats, start there.

If it's a stock RB like mine, it should have the heat activated choke. You can loosen the choke housing (3 phillips screws) and rotate it to adjust the mixture when the choke is set; the choke butterfly will open or close depending on the direction you rotate it. Sounds like its running too rich for sure. Mine was running too rich on cold starts with the choke on too, but I opened that up and it works great now. There is a second adjustment for the choke idle speed screw once you get the mixture right, so if it's too high or low, you can adjust that screw to get the speed right. I went back and forth between those two until I got it right.

Now when I hop in the car cold, I pump the gas once to set the choke, hit the key, and it fires right up. I have it adjusted to run on the choke at ~2,500 RPMs until it warms up, then it drops down to about 900 - 1,000 RPMs. I need to mess with the warm idle more because I think it might still be running on the main circuit and not the idle circuit, but it runs really nice none the less.

As for the top end, you might want to check the secondaries are opening too.

84Stock has some good info on these carbs too, he helped me out a lot with my old carb.

~T.J.