anyone around here know if 18 is an ok number for a stock 360 ???? come on dodge guys?

My smallblock chevy with a big cam makes 18 pounds of vacuum I'm not sure if dodges are the same but it seems to me that might be on the low end of the spectrum

 

Here http://www.autospeed.com/cms/article...nostics&A=2393
Vacuum reading has nothing to do with engine make, it does have to do with engine condition and build.

Dave

 

My Haynes manual says a healthy engine should make 17-22". On my gauge, 18" is the line between good and late timing. I can advance the timing, but that increases the idle speed that I can already not get down. This afternoon I'm going to go though the carb again, take a good long time to clean and reset everything, hopefully that helps this time, if not, I'll rebuild and try the Qjet.

 

ya those are about the same numbers as a chevy, don't get me wrong it's not that 18 is low it just could be depending on the setup, with a stock cam my chevy would obviously make like 20 or higher and i live at a fairly high altitude.

anyways a friend of mine had some troubles with his chevy smallblock almost the same as what you describe with your truck, after swapping out the carb they dissapeared, Hopefully after you go through the carb again the problems will be gone.

 

I stripped it right down today, cleaned every bit and cranny, reset everything (one float was way out, musta got distracted and set the same one twice last time?). I got it on the truck just in time to pick up supper. Did a quick set up with no vac gauge, just by ear, and it ran better. Will set it up properly tomorrow, but it looks promising!

 

Ok, played with it today. Runs a bit better, can get it to idle down properly (at hheverb end of the screw), starts well cold and hot, idles smooth. But still bogs out when snapped open, and if help open, stalls. I just can't tune that out. Is this a symptom of too much carb? I've read on a bunch of different sites that you can't over carb with a vac secondary carb. Perhaps it is just too much for a stock 360? What other carb choices are there for a spreadbore 360?

 

Possibly needs accelerator pump and adjustment on secondary control.

 

Possibly needs accelerator pump and secondary vacuum control adjustments.

 

The accelerator pump seems to work, get good streams of fuel out both sides. I had it on the outer hole originally, I changed it to the inner hole this last time to see if there was any difference, there was none I could tell. By secondary vacuum control, do you mean seondary air valve adjustment (closest thing I could find in the kit instructions)? I set that at 1/2" per the instructions. The bogging out is a symptom of to rich a mix? I did notice raw fuel on the air valve when it would open (would only open a tiny bit tough), to high a fuel level? I read that 1" is recommended float setting, though the instructions say 29/32.

 

Not real sure why it would stall if you held it wide open .. unless you did it for long enough that it maybe flooded itself? not sure if a vac secondary carb could even do that as it basically pulls the fuel it needs at high rpms or so i thought.

The bog when you snap it open is generally cause by too much AIR it takes a second for the fuel to catch up when you jump on it hard and throw a bunch of air into it, I really don't think that could be tuned out on a TQ, if it's just a minor stumble when u first jump on it hard just ignore it and walk into the throttle a little easier sometimes the bog seems worse when your under the hood pulling on the carb than it feels in the vehicle when your stepping on it. Guys tune aftermarket carbs to get rid of that hesitation and maybe a stock car guy could do it on your carb but I'm just not sure.