I also have a Carter 625 kicking around to try. May as well try everything I can to get that AFR close to 14 at idle.

hey also have a fairly new 1405 too.....they`re small but that`ll help me see if I can get to normal AFR readings......

I had a 1406 on a stock 350 horse 440 in a C boat (came that way) & ran flawless. not sure if they richened it as 1406's are lean but 1405's are richer so you'll be fine (at least on the mains). post how it turns out

worth a try to get lower AFR .....see next week.

OK...here's one plug as they all look the same. I just changed them for NGK short as these seemed to be very long. ????

Now, I did put on the 1405 and even worse, AFR 29-30 at idle.

So checked timing again. at idle 12 deg, at 2000 rpm - 35 deg mech. At 18 deg idle even worse. So this dist is literally junk.....I have read Procomp has many issues. And Skip White doesn't reply. So no worries...the MSD is going on tomorrow.

So i'll keep trying tomorrow.

Ohh BTW, I am running to much pressure at the pump. Starts at 5.5 and after turning over a few times using my Vac/pressure gauge looks to be nearly 10 psi.,....WOW! Will get a regulator and gauge tomorrow as well.

You got a lot of problems if that plug is indicative of all 8.

TOO RICH, your afr reading is plain wrong, period. Find somewhere else to take it, the tail pipe is not cutting it.

Too long, if that much of the plug is exposed inside the combustion chamber you have issues.

I suspect your timing problems are self induced as well.

Well no where here to take it. I'll weld a bung in and put the O2 in the exhaust.

I suspect the dist for sure. When a 1405 runs like this, I agree. Have lots of work to do, so will update in a few days once I get the new components in.

thanks

Well got new MSD installed. Funny thing. I cant start the car now with the ign switch. Have to turn the switch on and use a started button....guess I need a switch now.

Here's a New plug with a run on it. So yuup....super lean. But still smells dog rich...eye burning.

So have to put in a few springs as the dist needs recurve. Vacuum gauge says eng likes 20 deg initial. But at 3000 rpm max mech advance is 25 deg, so got to bump that up. May start to fix my AFR problems. Also will weld in a bung and get that O2 in the pipe not the tip. Stills works fine on newer vehicles from the tip, so I don't know.

Ideas.....

[img:left][/img]

Like any box the MSD would need to be fed in ign2 (crank) also which is sounds like ain't being done (check how you have it wired). Not sure if it is gassy from extremely rich or if you are smelling the unburned mixture from a lean misfire. I'm thinking the 1st one. I'd block the rods up or screw in a gutted PV (removing the spring from a junk one might work??) which would I would think help if it is a lean misfire (wouldn't take long/easily reverseable)

Yuup....thats what it was. Have to bypass ballast as start and run are in each side. It's fine now.
So latest is have dist dialed in. 15 initial, 25 at 2000 and 34 at 3000+. AIR at idle still 23-27. The rest is fine. Still didn't weld in that bung, but I don't know of it will make a difference. The tail pipe adapter works fine it seems and on others as I mentioned. But if you guys feel it is needed, I can.

So says running lean but smells rich. Have the 800 in with the biggest rods I have....pulled plug 1 again and white....terrible. So tells me the AFR is correct. But its getting better. Although still pings. I used gas from the tank a here in the acreage and I think my guy filled it up with 87...I have to get some 91 in and try it.

So now I'm thinking my eng doesn't like edelbrock.lol. May looks at demon??.

Well back at her...could do comp test but runs fine.

Wow..i need help. Took 2 plugs out and WHITE...im going back to the 750 #29 on the scale. That's all I have for a combo as I bought rods from edelbrock to treat rich before this started. So what does one have to do? The AFR is correct......

OK...went from this this morning

[img:left][/img]

to this now

[img:left][/img]

So getting better. I put the 750 back on with #29 jet/rod combo. Still was lean so kept the jet and changed for 70x37 instead of 73x42 rods. So better but still lean misfire. Not as bad on the eyes and better on AFR like 20-23 now but still smells rich. So again the AFR meter is working....reading what Im doing for sure at the tailpipe with adapter.

So I need a big carb....this one has a lot of slop in the throttle body and losing between 50-90 rpm when playing with it. So vacuum diff of 5hg. That's done I believe.

The 800 is like an older webber design and I think it has issues in the circuitry, so next step? I think new carb to start, but im wondering about the Demons? How do you guys feel and what size. I think this motor needs an 800???

Ideas......

Well. did compression. all 130 to 140 with #1 being exception at 115. Did wet and no change. So allowable within 20%. Looks like a valve or maybe the cam lob. That could be why having so much trouble with the AFR readings?

Guess I was out....no more than 10% between high and low. So im just over. Guess I have to check into whats up.

Know what.....if this has been like this for the last 7 years since the motor was installed, I wonder if it's carboned up? That would explain a lean mixture but smelling rich. As well the compression issues?

It cant have more then 10,000 miles on it....wasn't a daily driver....

Think I'll do a sea foam treatment then a leak down test. At least it'll be clean when I do it again.

Make sense anyone???

I wouldn't worry about the AF mixture. I set it for how it runs the best and roll. That motor might want 40* total advance. I'd put the 800 on it, go back to square one.... start it run the rpms up to 2200, set the timing in full at 38*, back the rpms down to 750 and adjust you mixtures for best vacuum reading, check your initial and go for a ride. If it runs good leave it alone.

Well could but still pings. That has to be dealt with as well.

So you wouldn't be worried with all that has gone on with this? Last week it punished well. Great throttle response, even with a one ledger 2.76, she smoked that one time well..lol. Now seems loss of power. But it did and still smells rich..too much. So I have to deal with that..
That's what started this

....it's not got lisc plates as I need an out of province inspection first. Can drive to the gas station, but I'll get some jerry cans of premium in today. See if the pinging backs down..

Bring the cylinder with low compression up to TDC on the compression stroke. Rig up a way to get air pressure into that cylinder, 50 lbs +/-. Then listen in the tail pipe, carb, and valve cover breather for the air.

Quick and easy way to determine if the comp loss is past the cylinder or a valve and will indicate what the fix will likely entail.

A modest loss of compression can cause a miss at idle and then not be as noticeable as RPMs increase.

What spring are u using with the rods? Pink will get u into power mode and thinner part of rod faster. You may be lean all of the way thru?
What is your best vacuum at idle?