valk

Maybe go back and do another compression check on all cylinders. Doesn’t take long and it may point to something.

Wheels look too small to me..

Yea it’s tight in there. I’ve always wondered about the sharp right angle of the “out” gas line that snakes up the side of the engine.

Shoot I’ll take ‘em. Please tell, call or PM me what I should do. I live in Bethesda Maryland. thanks, Peter 301 213 4406

..Couple more ideas, fan bearing or belt too tight.

Damn it does sound like the pump. I would try using a stethoscope to isolate the sound to confirm. Maybe squirt some WD40 on the belt to see if the noise changes. You know better than me what to do... Peter

Man, what difference. Thanks Ken

Thanks Matt. I’m a little puzzled that I need to advance the idle so much to keep the rpms up when using the tool. I guess the larger carbs sucked a lot more air.

Went on a short spin with the new 528s and they performed well. No stumbling when cold and it ran just as smoothly as the larger carbs when warmed up. Plugs look good, just have to dial in the chokes as I have them wide open at the moment. It being so hot these days, they are really not needed. Looks like I’ll have 1 of the larger carbs up for sale if anyone is interested (490s/533s) I’m keeping 1 so it can go back to stock if desired. Case closed until the next project...

Thank you!

Yea, me too. And I sometimes have a hard time finding stuff that has already been discussed Thanks Neil peter

While we’re on the subject, I know both you (Matt) and Neil have converted to LED lights. Could you direct me to your write ups? Sounds like something I should consider. thanks, Peter

This may not apply at all but it was possible on my ‘58 continental with a lot of muscle and care not to bend the frame irons. Brake fluid has to be forced back out of the 2 top cylinders. Disconnecting them, of course, makes it a lot easier.

I guess I just have to goose the idle speed more than I was doing...moving on...

Update: The larger main carbs (490s) from the 320 engine worked pretty well, actually, very well. My only complaint was that the car would occationally stumble slightly on take off. Mostly out of boredom, I purchased 2 528Ss, the main carb from the smaller engine that most folks use in this set up, and installed them yesterday. One is a good rebuilt unit (thank you pont35cpe), the other NOS (thank you Lawrence). So far, it runs pretty much the same as the larger carbs but I haven't gone on a run yet. One problem that has surfaced is that I'm having some issues balancing the carbs using a Uni-sync tool. Engine RPMs slow down and the engine will be close to stalling when I put the tool over the carb, even with the tool's air valve open so much the red indicator just goes to the first line. So I have to place the uni-sync on the carb, note the position of the red indicator, and quickly take it off before the RPMs slow down. Did anybody else have this issue when trying to syn the carbs? Chokes are wide open and all 4 idle mix screws 1 turn out. This wasn't a problem on the bigger carbs., I was able to place the tool on the carb and leave it there without the engine slowing down. Any ideas? Thanks, Peter

All this from a 21 year old from France, on an American car. You are truly remarkable, Sebastian.

Thanks Lawrence, I’ll give them a call tomorrow.

Thanks Greg! Got one, need to snag another.

What are you doin’ in purgatory, you been a bad boy? All sins forgiven if you sell me a carb...

Huh? That one went right over my head... I’ve secured 1 carb from a generous fellow forum comrade, just need one more...

Out of bordom, I am considering conducting an experiment to identify the best Carter carbs for a '41 320 dual carb set-up. The conventional way to go, largely a result of Lawrence H's excellent work, has been to use 2 Carter 528S's, the main carb from the smaller engine, and many here have expressed satisfaction using these. I elected to try 2 of the larger Carter 490s (actually a '41 490 and a '42 533S), the main carbs from the larger engine, and while they work great when the engine is warmed up, it stumbles a bit on take offs when cold and I can't seem to get rid of it by choke adjustment. As such, I want to get 2 528s to see if they are better and if they are, I'll sell one of my larger carbs. If not, I'll pass the 528s on to some one else. So anybody got a nice Carter 528S to sell? I saw the ones on ebay but the cheap ones are too far gone and the expensive ones are, I think, over-priced. Thank you! Peter

All great ideas, thank you. Went for a spin yesterday and the pump was pretty quiet so maybe I can postpone this a while. It’s been pretty noisy at times but it works and temp has not been an issue (yet). I’ll now be ready when the time comes.

Thanks Dave. I used to buy a ton of stuff from the Kanter brothers many years ago when I had a Packard. I’ll check them out for sure. hope you’re doing well peter

I’ve not heard from him but I think I’ll just get one from Bobs or Cars as I’m a little skeptical of older pumps that have been sitting around for a while. Thanks for the heads up though.

Thanks boys, I can’t recall any bad things said about any of them so I’ll go with either Cars or Bobs. I’ll try it first without removing the rad but I will if I run into trouble, which I do more times than not. unrelated, I bought a hub cap from Bobs for under a $100 (with shipping) and it’s beautiful.