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2275 Type I, New motor

44 Webers, 150 Main, 65 Idle, 200 air  I live at 2500' and drive between 2000-4000'.

 

I adjusted the valves to .0 for the first time, and tightened the belt by one shim. Went for a few drives. Drove great except for some stumbling at about 2500 rpms. I figured I'd need to adjust the carbs at some time.

 

I changed the oil, filter, and sump cover with a drain plug. 20/50 Brad Penn oil, 1334 Napa Gold filter. It was the Napa equivalent of the Bosch 3310 that came on the car. Then the car sat for a few weeks while the Rainamagedon took over the weather outside.

 

Today, finally a clear day. I start it up and it doesn't sound right. Hard to explain, but it wasn't as smooth as it was before. Every minute of so, at idle, the tone changed. The exhaust seemed to be a touch more vigorous for a split second. After it was warm, I took it out. The power wasn't there so I turned around and headed back home.

 

I removed the Idle, and Main jets and gave them a spray and blew them out with air. I took it out again, but the same.

I checked the timing and it was at about 29-30, so I adjusted it to 28 degrees.

 

What should I check next? What could possibly change with the car sitting?

 

Thanks,

CG

 

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Does it have points or an electronic replacement? If points, check point gap, and make sure there is distributor grease packed against the block, on the leading edge so the grease doesn't get thrown around and foul the points. Was the timing adjusted to 28' originally? How much did it change when you adjusted the valves? Do you have aluminum or chromoly pushrods? Did you happen to notice any glitter (fine aluminum pieces) on the drain plate when you changed the oil?

 

What camshaft, rockers, heads and exhaust does it have? Compression ratio? 

 

PS- Oh yeah; what Lane said too.

Last edited by ALB

82mm forged crank, I don't know make

Engle FK8 Cam

Scat lifters that have been refinished, polished and parkerized

1/4 rockers, Unknown make

Unknown heads, but something had a Stage 1 port and polish

AA 94 X 82MM P/L SET ??

Chromoly pushrods

Compufire

NGK D7ea, I just removed one and it was black and sooty looking, Too rich?

No glitter

I didn't make note of previous timing.

1.5" stainless exhaust with Magnaflows

This is a Seduction build. Motor was built by Competition Engineering in Phoenix.

 

 

I guess I should reach out to CE for some more details. The info on my invoice was minimal.

 

I'll test the coil tonight.

Danny,

 

About the points eliminator set screw.  after the autocross at Carlisle this spring, my car was acting poorly, missing at high speed.  Ran and could be driven, but was poor.  I dis a few things on the engine, not the least was to buy a new coil and Pertronix unit.  Old device was (as listed here) Compufire.  When I went to replace the old Compufire module with the new Pertronix (all made by the same compant, as far as I can tell) I found the set screw loose.  Hmmmm . . .  ANyway, the new coils was installed and the new Pertronix, with a very tight set screw, AND some blue Loktite. I can report that the engine started almost before I touched the key, I mean instantly, after sitting for a few months. Not sure what was exactly wrong before, but all is jake now. Runs good, ,strong, smooth, and winds up tight, like it should. I do not know what Carlos is dealing with here, but it very well could be ignition.  BTW, this "total rebuild" of my ignition cost less than $100 - a new blue coil and the Pertronix.  Simple.

When I got home and finished dinner, I went out and did a few things:

 

-Points eliminator screw was tight. I also chased the wires to make sure they were secure. Is there a way to check the ohms on this thing?

-I checked the ohms on the coil and it checks out.

-I pulled the plugs, they were sooty and black. I cleaned and checked the gap and reinstalled. The gap was about .76mm. Is that the usual gap?

-I couldn't tell if there's any fuel in the oil, but it is fresh and the level is between the two lines. Actually it's 3/4 up from the bottom line. I was going to unscrew the filter to let out a touch, but I might just pull the valve covers off and check the valves, just to be sure.

 

I didn't start it up tonight just to be courteous to the few neighbors that live near by. I kinda live in a cove, and sound travels very well. Maybe I'll wake them up tomorrow morning before I go to work.

I'VE GOT THE POWER!

 

I didn't wake up the neighbors, but after my ride today, I checked the valves and springs, warmed it up and rechecked the timing. All good. I even went by the parts store and picked up an old school condenser and points just in case, I wanted a set anyway. I took off for a test drive, and now I'm back to terrorizing the roads. Bwahahaha!

 

I don't know what I did, sometimes messing with too many things all at once is not a good way to find out what the problem is. The only significant thing I did was clean the plugs. It could be some intermittent ignition thing, oh happy day. Well if it happens again, I'll drop the regular points and condenser in and go from there.

 

It still stumbles some around 2500rpms. I need to either learn this carb thing or find a local weber whisperer.

 

 

Car runs fine.

 

Car sits for a week in Rainamagedon.

 

Car no run fine.

 

Car dries out for a few days.

 

Car runs fine.

 

Carlos, I don't think it's anything terribly complicated. I would look at anything in the ignition system that could be affected by too much moisture in the air - plug wires, dizzy cap, plug wires, rotor, and oh yeah - plug wires.

 

Bad plug wires look exactly the same as good ones, but are cheap to replace.

 

Happy motoring.

 

 

Originally Posted by Carlos G:

I'VE GOT THE POWER!

 

I didn't wake up the neighbors, but after my ride today, I checked the valves and springs, warmed it up and rechecked the timing. All good. I even went by the parts store and picked up an old school condenser and points just in case, I wanted a set anyway. I took off for a test drive, and now I'm back to terrorizing the roads. Bwahahaha!

 

I don't know what I did, sometimes messing with too many things all at once is not a good way to find out what the problem is. The only significant thing I did was clean the plugs. It could be some intermittent ignition thing, oh happy day. Well if it happens again, I'll drop the regular points and condenser in and go from there.

 

It still stumbles some around 2500rpms. I need to either learn this carb thing or find a local weber whisperer.

 

 

Sooty black plugs not good. 65 idles might be a little rich. My car also stumbles like yours, engine builder told me the venturis in the 44s are a little too big. He said if I went down one size it would fix the stumble but cost 3 or 4 hp. I'm gonna live with it. Your engine is a lot bigger than mine so maybe the venturi size is good for your engine. Just a guess.  Bruce (air cooled) had the same stumble as mine and changed for the smaller Venturi and fixed it. Both ours are 2110s though.

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