The 1947 - Present Chevrolet & GMC Truck Message Board Network - View Single Post - 4 hole carb spacer for better signal, will it work?

Mr Handy · 07-02-2016, 07:30 AM

If your thinking of a new Distributor I recommend a D.U I. from Performance Distributors. Made a good difference in how my 350 runs. I did a lot of research on dizzys and this is the one I settled on. Heck they tune the dizzy and it is calibrated to 24* total at 3000 rpm. I'm running 12* initial. It also seems to be the only new Dizzy that is calibrated ere in the US.

I think you should be able to get the 750 to run mo problem. A 4 hole spacer can't hurt. if you get a spacer get a 1" spacer. That seems to be the optimal thickness.

I had an issue with backfiring through the carb and the problem was that the distributor clamp was a POS and warped not holding the distributor tight. I dug a stock clamp out and have been fine ever sense... It was also a skip white dizzy and I switched to the DUI.
If you are running 18* initial and only getting 36* total mechanical there is something wrong unless you have the advance limited. 18* initial seems like way to much especially if you are running vac advance.

07-02-2016, 07:30 AM	#7
Mr Handy Registered User Join Date: Feb 2013 Location: Spring Hill, Florida Posts: 465	Re: 4 hole carb spacer for better signal, will it work? If your thinking of a new Distributor I recommend a D.U I. from Performance Distributors. Made a good difference in how my 350 runs. I did a lot of research on dizzys and this is the one I settled on. Heck they tune the dizzy and it is calibrated to 24* total at 3000 rpm. I'm running 12* initial. It also seems to be the only new Dizzy that is calibrated ere in the US. I think you should be able to get the 750 to run mo problem. A 4 hole spacer can't hurt. if you get a spacer get a 1" spacer. That seems to be the optimal thickness. I had an issue with backfiring through the carb and the problem was that the distributor clamp was a POS and warped not holding the distributor tight. I dug a stock clamp out and have been fine ever sense... It was also a skip white dizzy and I switched to the DUI. If you are running 18* initial and only getting 36* total mechanical there is something wrong unless you have the advance limited. 18* initial seems like way to much especially if you are running vac advance.