Hey, just thought i'd try to find a decent dizzy for my 351 clevo ,it has a bosch style dizzy at the moment, it does have a bit of work 2 it, its a trick and mansweto built eng with around 450hp,question,would it be better to reco and regraph current dizzy or is their a better after market one available?? it is a xe also with a c4 with 3500 stally and 9 inch with 3.7:1 ratio ,it will be a street and strip car, cheers..Vito.

Hi

Just use what you have already if it is a genuine Bosch distributor

Have it regraphed to suit you engines application these distributers are very good and will no doubt do your job.

Merry Christmas and a Happy New year 2008

cheers

as above thats what i did - perfect

the bosch dizzies are ok, but in the long run you will be better off with an accel / msd dizzy, because of the ease of adjustabiity.
They are supplied with a selection of springs and bushes so you can setup your initial / total advance and the curves yourself. If you have cast heads you want a fair bit of initial timing (14-16 degrees) and the total timing in by around 3000 rpm

just keep in mind if you block is the late one fitted with factory electronic dizzy, the shaft size is different to the early ones.

MSD only do the shaft size that suits the early block. to fit an MSD dizzy you need to have it machined down to fit.

Cool, thanks for the advice, i was thinking of getting the bosch dizzy reco'd and regraphed to suit my motor, that would work,or a accel dizzy, but not a procomp dizzy, i heard they are junk...vito.

For better spark, you can hook up an MSD 6AL unit to the Bosch dizzy. It does make a difference, especially if you have 10:1 or better comp ratio.

NEVER EVER EVER EVER EVER EVER EVER buy any ignition parts from procomp. they are absolute s**t. a good condition bosch dizzy or NARDEK replacment dizzy and an MSD blaster coil will out perform and out last a complete procomp igntion (dizzy, CDI and coil)

the other problem with the procomp dizzies is they have to much mechanical advance and the advance springs are far soft. resulting in an engine that won't idle for lack of advance and will ping it's heads off at medium to high RPM due to over advance


like has been said. MSD or recond bosch dizzy with a MSD 6A or 6AL if you need a rev limmiter.

I'd go with an MSD dizzy for ease of setup. either ready to run if you only plan on using a coil by its self. or a magnetic pick version for use with a 6A.