DUI Dissy

[xrwagon]

I need to re do the timing on my motor, i think it has to much total, i took the vac off to stop it advancing while i was tuning it. I should have done the timing first, but carb was way off and i also had low fuel PSI and volume so had to overcome that. My dissy is the Classic one, it hasn’t been touched since purchased. Should i do it by a vac gauge or just set initial at 10-12. Motor now has the tickled 2V head, not sure on my comp, have 54cc chambers in the head, bottom end is a ’68 200 with a Permatorque gasket. Modified alloy manifold, and a 350 Holley. Modified extractors. When measuring manifold vacuum, i did this with the vac advance line off, gauge showed 19-20.

 

[rbohm]

i would set the initial at 10-12 degrees, and work from there.

 

[wsa111]

Thats good information on the DUI Mike offered.
To get optimum performance your distributor need to be recurved.
Mike had no idea on the proper tuning on any distributor he offered.
The DUI is a good distributor but needs a major work done for proper performance.

 

[rocklord]

I need to re do the timing on my motor, i think it has to much total, i took the vac off to stop it advancing while i was tuning it. I should have done the timing first, but carb was way off and i also had low fuel PSI and volume so had to overcome that. My dissy is the Classic one, it hasn’t been touched since purchased. Should i do it by a vac gauge or just set initial at 10-12. Motor now has the tickled 2V head, not sure on my comp, have 54cc chambers in the head, bottom end is a ’68 200 with a Permatorque gasket. Modified alloy manifold, and a 350 Holley. Modified extractors. When measuring manifold vacuum, i did this with the vac advance line off, gauge showed 19-20.

With a thicker head gasket, and larger than stock combustion chambers, the CR would be lower than stock.

I agree with wsa111, you need your DUI recurved.

 

[xrwagon]

Theres a reason it was done like that, i have a supercharger manifold for a weaned 142 blower to go on, the head won’t be shaved, you cant unshave a head lol.