advance spring question ?

[titan]

Hey Guy's, question ?
Engine: '68 318 many, many miles, but run's well. 4bbl, stock 340 cam. I converted to elect. ign. engine times best at 7 deg. btdc. BUT hit's 35 deg. at 1525 rpm's. i pulled dist. back out to check spring situation and compared to original spring in points dist. i had replaced and they were the same. wouldn't it stand to reason i need a stiffer spring to slow up advance ?and what degree total advance and when do i want it to come in for this mild combination? dist. is stock out of who knows what that i had removed years ago. orange ecu. one more question: previos owner installed cam and intake, a stock cast iron 340 intake on the original '68 318 heads. if memory serves me, arent the 340 intake ports quite a bit larger than 318 heads? a bad match? what should i exspect,just a temparary engine while i perform body work/other modifications. thank for help. BRIAN

[6 packin]

Seems it does have a fast rate of advance there. That dis will make a good high po engine run well. Ditch the vacum advance and run about 14 deg intial and still have the same total. Your correct a heavy spring will slow the curve down. The heads and intake dont match well, your correct there, but as you said, if going to another engine later on, i would spend a dime on it. As long as it gets ya from point a to point b.

[Bigfoot]

Titan: Most people say that all the mechanical advance should be in at 2500 or so for a stock or mild engine and 2000 for a race only engine. If you want more initial timing you will have to weld up you advance slots a bit to take out some of the mechanical advance. Does the car ping right now when you floor it with the vacuum advance disconnected and plugged?

[titan]

have only taken car on maiden voyage and did not push it yet. although it is a mopar and i have NO doubts of its strength! im going to go out today and give it a real test. as far as vacuum advance goes i left it unhooked this last time to get 35 deg. at 1525 rpm as opposed to about 1300 rpms with it attached to ported vacuum.