It's pretty easy to do on an MSD. I currently have it set up at 18��initial with a 21��advance bushing. Total of 39�� I have one light and one medium spring. Advance starts at 1300 rpm and is all in by 2600 or so. With my converter, the advance is all in by the time the car moves anyways, so are there any advantages? Starting it with very high initial would not be a problem. I have a seperate switch for the iginition. I can spin the motor and then fire it. Plus I have a gear reduction starter.

For the new members that don't know my combo: 69 Mustang, 383W stroker, solid roller cam .624/.628 262��272��@ .050, 104 lca, 13:1 comp dome pistons. Powerglide, 8" 5400 stall converter 5.43 gears 33" tall tires. 3000 lbs w driver.

Thanks,

David Cole

That's what I wanted to know. I'm going to try it at the first T-N-T of the season next month.

Later,

It is the way to go on a strip only car! Do you have a timing retard feature in your ignition?

No, I don't have a timing retard. But to make starting easier I do have a seperate switch for the ignition. I can turn off the box (MSD 7AL2) with the switch. The hit the key, spin the motor and then flip the switch for the ignition. It will fire instantly when I do that.

With my distributor set up the way it is now it will turn over easily even with the ignition on, but I've been using the switch if the car has not been started in a few days. I spin it over and then flip the switch the instant I see the oil pressure gauge needle start to move. Makes sure that all the oil galleries are primed before it starts.

Later,

Perfect, do it. It'll idle better too.

quote:

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Originally posted by Moneymaker:
The timing would be absolute David and would never vary. This is the way I set up all competition engines or real hot street and strip stuff. I only do curves for mild street applications or when I have to use a customers older distributor.

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I have never thought about doing this because I do drive on the street just a little. I only drive it to work, maybe once a month in good weather.(summer only) Should I try this? Will it really be a benifit?

His engine is going to be easier to start than a 12:1 351+ci bullet.

Engines with locked out distributers DO have some serious off idle throttle response!

If you want to try it with a high compression, large ci engine, a timing retard can make life much easier. Many ignition boxes offer a 20 degree "start" retard for such applications. If you've already got an MSD setup, the "multi step retard" can be added, and has this feature. I believe the Digital 6+ has it built right in.

Good Luck!

It is the way to go, esp. if you have a timing retard. Of course not for your daily driver, but on a mostly strip car it "rocks".

Running that low of a compression ratio, and building workable compression with a cam capable of 9k rpm takes some doing!

As some know, the piston can only compress the air it traps in the cylinder. Long durations and wide lobe seperations push the intake closing event into the "compression" stroke. If air is escaping out the intake valve as the piston travels upward, it's not getting compressed, and cylinder pressure goes out the window! Narrowing the lobe seperation helps build more compression. I'd say you also have the cam advanced quite a bit too.

Some people mistakenly believe that compression is lost during the OVERLAP period... WRONG! Overlap occurs when the exhaust valve is closing and the intake is just starting to open... Nothing is being compressed yet! NARROWING the lobe seperation pulls the intake closing event out of the compression stroke. Advancing the cam will make the intake valve close sooner as well.

Oh, By the way... one of my home ported 289 heads is getting flowed! The valve job is old, and the seats aren't as high as they used to be... but I'm anxious to see what they're worth. I'll share the info if anyone is interested.

Good Luck!