Wo runs an MSD distributor?

[CMars45000]

I am getting ready to buy ignition components for my 327 and I am lost between the different Pro-Billets. They have the Pro-Billet Ready-to-Run, The street pro-billet, the pro-billet, and teh pro-billet HEI.

I am going to be running a MSD Digital 6 box. I am torn between the pro-billet and the street pro-billet. What are the advantages of having/not having vacuum advance? What are the disadvantages?

This engine will see the high side of 7,900 rpm with a solid roller cam...


I am just trying to get the best dist. for my setup...


opinions?


thanks

[rage'nrat638]

the pro billet dizzy is for a race engine with a very lumpy cam where you might have your timing chain gears advanced or retarted to have timing built into a engine..thus no need for a dizzy vacuum advance pod

on a stock to mild built engine..a vacuum advance is the way to go..

on my 496 hyd cam engine with a lumpy cam i have no vacuum advance on my pro billet dizzy. but i run a double pumper carb..

on a engine with a carb that runs vacuum secondarys thats mildy built a vacuum advance helps the carb and engine work together..

8000 rpm's a lot of rev's..this engine better be built like a mofo. to withstand that with aftermarket rods pistons,crank, arp bolts, balanced,sfi everything,,heads, ---stort term----engine.

anyway good luck..mark

[CMars45000]

yeah it is build on the high nickle block, forged 3.25" crank, Manley H beams 6" rods with cap bolts, Ross pistons, Brodix Heads with 2.02/1.60" manley Pro Flow Valves, Comp 289 solid roller cam...

should be a runner I hope...

thanks for the input....
that cleared things up for me a lot...

[Jtrux]

I have the pro billet with the vacuum advance and I love the adjustablility of the whole system. I run the 6AL box and the blaster coil with matching wires and have never had a problem.

[rage'nrat638]

sounds like a non vacuum advane model is where you need to be...
sounds like a killer engine
heres a picture of the 638 ci dart block with a 6al box probillet dizzy 1250 dominator carb

the box on the right is a msd multi function controll box that lets you adjust timing to each cyl. launch rpm's a ton of stuff..
20,000 engine .. no need for a whimpy vacuum advance pod


lets see soime pictures

[lilpup69chevy]

i would want the vaccum advance on it if it were me, on my race car i just advanced the timing and locked it in place with no advance, but it was not a daily driver whatsoever

[ghackett1]

That engine is awesom. Real nice job. I do have one comment though, why are you still running a mechanical fan? An electric set up would be good for another 12 to 15 HP.

[Trey`]

I was thinking the same thing. That and what does the rest of the truck look like, Nice engine.

[rage'nrat638]

Originally Posted by Trey`

I was thinking the same thing. That and what does the rest of the truck look like, Nice engine.

ok well with 850 hp. 10 hp one way or the other don't make much difference..

it also has duel electric fans with that manual fan..
two trans coolers....

heres my 69 c20...thats what i tow the other with when needed