where do i set base timing on my 418 stroker( UPDATED)
#789210
08/31/10 02:47 PM
08/31/10 02:47 PM
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Joined: Jan 2003
Posts: 1,365
elmira ny
hp340nos
OP
pro stock
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OP
pro stock
Joined: Jan 2003
Posts: 1,365
elmira ny
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how do i know where to set base timing on my 418 fresh build, and how fast to bring in total timing.distributor is an older mp unit that was bought with electronic conversion kit.current ignition is msd6al with blaster 2 coil, motor is 340 stroker 418 cid, 9.7 comp,ported/polished cast iron x-head open chamber.cam is herbert solid roller .246/.253@.050,lift is .585 in/.600 ex. 108*centerline installed at 103.5*,weiand x-celarator intake,750 db pumper jets are 72f/82r with 6.5 pv in carb.vacuum is currently at 11" at idle at 1200rpm,when i put it in gear, it idles little rough and vacuum drops to about 6.5-7.5 it fluctuates with the cam lope . i have a older dial -back sears timing light that i believe is reading higher than it actually is,it says base timing is 30*but it starts without any problems,im borrowing a friends non dial back timing light to verify if my timing light is indeed reading wrong.any tips, ideas.thanks mike
Last edited by hp340nos; 09/01/10 12:11 PM.
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Re: where do i set base timing on my 418 stroker sm blk?
[Re: hp340nos]
#789213
08/31/10 07:33 PM
08/31/10 07:33 PM
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Joined: Jan 2003
Posts: 302
Casa Grande,Arizona
DennisJ
super street
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super street
Joined: Jan 2003
Posts: 302
Casa Grande,Arizona
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Take the relucter out of the dist,pull the advance weights and look for the advance # on the part that holds the weights. whatever the number is you double it.(if it is 11.5degrees x 2 is 23 degrees) Subtract that from 35 degrees and you will have your initial timeing.
With the x-heads I would shoot for 35 degrees total.
Dennis Jokela
I started out with nothing,and I still have most of it.
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Re: where do i set base timing on my 418 stroker sm blk?
[Re: hp340nos]
#789216
08/31/10 08:22 PM
08/31/10 08:22 PM
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Joined: Jun 2003
Posts: 52,972
Romeo MI
MR_P_BODY
Master
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Master
Joined: Jun 2003
Posts: 52,972
Romeo MI
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Quote:
mr p-body the dist that is in it now is a dead stock small block. i was told to try to establish base timing 1st with the stock one then,i can figure out what my mp dist wants as far as curve goes.the other dist that i have is a mopar performance dist.it is set up if its 20 base* total is 35* but i think the total is coming in to quick so it wont idle that well once i put it in gear.if it idles at 1300 rpm i put it in gear it drops down below 1000 and wants to die out some if i dont touch throttle.i set the timing with a dial back light(sears dial back),could be the problem,it reads 30*base,and does not kick back when it starts so i borrowed a non dial back to check against mine. i think its reading wrong on my msd6al and the dial back but need to verify that. thanks mike
Bump it up even more... try it at 35... with that
dist it might be pulling the timing out at the 1000
rpm point... what is it at idle in gear
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Re: where do i set base timing on my 418 stroker sm blk?
[Re: hp340nos]
#789218
08/31/10 09:15 PM
08/31/10 09:15 PM
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Joined: Jun 2003
Posts: 52,972
Romeo MI
MR_P_BODY
Master
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Master
Joined: Jun 2003
Posts: 52,972
Romeo MI
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Quote:
im not sure what timing is in gear, i will check it in the morning,i will check it with the dial back and non dial back to make sure the problem doesnt lie in the dial back timing light(reading to much timing when its actually lower than it reads)say it reads 30* on the dial back when its actually 20* on the non dial back light etc,does this sound right, i want to make sure im giving acurrate info to diagnose.
Yeah just try the non dial light
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Re: where do i set base timing on my 418 stroker sm blk?
[Re: Devilbrad]
#789222
09/01/10 12:53 AM
09/01/10 12:53 AM
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Joined: Jan 2003
Posts: 1,365
elmira ny
hp340nos
OP
pro stock
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OP
pro stock
Joined: Jan 2003
Posts: 1,365
elmira ny
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Re: where do i set base timing on my 418 stroker sm blk?
[Re: hp340nos]
#789223
09/01/10 12:23 PM
09/01/10 12:23 PM
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Joined: Jan 2003
Posts: 1,365
elmira ny
hp340nos
OP
pro stock
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OP
pro stock
Joined: Jan 2003
Posts: 1,365
elmira ny
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dial back timing light was an issue with the msd 6al,it was reading 30*at idle (1100rpm),hooked up an old sear roebuck non dial back and it reads 24* at idle, this is with a dead factory stock distributor,put it in gear it idles at 800-850 rpm little shakey touch gas little it smooths up.now the dist i want to use is an mopar performance out of the electronic ignition conversion pkg, when i tried it before the stock one it wouldnt idle at all in gear,it has had the slots shortened,when it was in another motor if it was set at 20*base it was 35*total.springs are whatever mp put in it.what do i do? do i need a heavier spring to delay mechanical advance some so it doesnt come in so early,so when i put it in gear it doesnt drop timing so much?thanks mike
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Re: where do i set base timing on my 418 stroker sm blk?
[Re: hp340nos]
#789224
09/01/10 12:45 PM
09/01/10 12:45 PM
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Joined: Feb 2005
Posts: 28,312
Cincinnati, Ohio
Challenger 1
Too Many Posts
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Too Many Posts
Joined: Feb 2005
Posts: 28,312
Cincinnati, Ohio
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Quote:
dial back timing light was an issue with the msd 6al,it was reading 30*at idle (1100rpm),hooked up an old sear roebuck non dial back and it reads 24* at idle, this is with a dead factory stock distributor,put it in gear it idles at 800-850 rpm little shakey touch gas little it smooths up.now the dist i want to use is an mopar performance out of the electronic ignition conversion pkg, when i tried it before the stock one it wouldnt idle at all in gear,it has had the slots shortened,when it was in another motor if it was set at 20*base it was 35*total.springs are whatever mp put in it.what do i do? do i need a heavier spring to delay mechanical advance some so it doesnt come in so early,so when i put it in gear it doesnt drop timing so much?thanks mike
Your post is kinda hard to read. Caps and periods would help.
The 2 MP dist I have installed needed new pickups, both were giving me trouble until I replaced them with used ones out of stock dist.
You will need to close down the slots to just under half way to get the timing right. You will need approx 20 before at idle and a total of 35 at 3500 rpm.
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