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A little progress and a question.

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Bugeye_Al

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Some progress has been made on my little bugeye. Pictures will be posted hopefully in the near future.

In between work, holidays and other commitments I have gotten the following done in the last three months or so:

- Reinstalled the carbs after having Hap rebuild them
- Re-sleeved my master cylinder to 3/4" to better match my disc brake change.
- Swapped the rear brakes for the later style
- Bled the brakes and clutch (again)
- Fired the sucker up and re-checked timing, balanced carbs, etc. - The idle is about at 1,000 RPM with timing at about 8 degree BTD.

She runs well and pulls great in my short jaunts up and down my driveway. Yippee!!

My problem is a minor hard start issue (much better than it was before the carbs were re-built) and a run on\diesling problem at shut down. Yikes! I assume this can cause damage and want to figure out what's happening. This is a fresh rebuild by an amateur mechanic (i.e - me) When it is running, it runs very well and smooth. It revs fine.

Any thoughts on the run problem?

Thanks!
 
Prob is timeing.
 
Timing is my first thought, but I am confused. Maybe I am not advanced enough at 8 degrees BTD for this engine, but I wouldn't think that would cause the run on. I am not that knowledgeable on timing issues. More tinkering to follow I guess.
 
Al, am I correct in assuming that your timing figure of 8Âş BTDC is a dynamic reading?
I run my 1275 at 13Âş BTDC and it exhibits none of the problems you describe.
My 1098 runs at 15Âş~16Âş BTDC and likes it there.
Look for about 28Âş~32Âş total advance at 2500. That should free things up.
Jeff
 
Yes - 8 BTD is the dynamic. I had it more advanced initially, but still had run on. I will try adjusting this weekend.

It seems from reading old posts, people are setting dynamic timing where their cars best run rather than trying to get it at the "book" figures. I guess it all depends on the build.

Thanks for the responses!
 
And old parts like dizzy.
 
This engine likes premium gasoline. It was not designed for 87 octane. Sunoco 240 94 Octane is needed for Bugsy my 1098 to avoid dieseling on turnoff. Back to the simple stuff.
 
I hadn't thought about the octane. That could definitely be part of it since I have 87 octane in it now.

Jack - Good thought on the distributor. I didn't do anything to it except clean it up. It didn't seem to have any slop in the shaft and timing at idle is very steady. I assume a sloppy distributor shaft could give unsteady timing at idle.
 
It would but you must also consider the inards. Like the advance curve and anything sticking there. Does it really work even.

$100 will rebuild your dizzy and make sure all is like new. It takes a professional with a sun machine is my understanding.
 
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