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82Dodge331
Ignition Timing Tuning


Hello All,

I was wondering if anyone here has a good Timing Table for our 1st Gen Hemis?

I've got a '55 331, with 10:1 compression, factory cam, Hot Heads 4bbl intake, and Holley Sniper EFI with their HyperSpark Ignition system. It's in an '82 D-150, with A-518, 3.23 gears, and is just a cruiser, street, daily driven truck.

So with the HyperSpark I can create and change my own Timing Tables. Its exactly like Holleys Dominator, Terminator and HP EFI systems, if anyone has used them, just a Vacuum over RPM table.I was hoping someone may have a good Holley Timing Table I could start with for a similar application?

If not, if anyone else has a set-up similar to mine (street cruiser) that knows where I should start? Like what's your Mech Adv? When does it kick in, kick out? Initial and Max Timing? Idle speed? Also Vacuum Adv curve? Then I can take that knowledge and make my own Timing Table.

I do appreciate any and all help.
  user offline
on: Thu 04 of Mar, 2021 [16:49 UTC] reads: 890

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82Dodge331
user offline
Re: Ignition Timing Tuning
on: Tue 13 of Apr, 2021 [13:11 UTC] score: 0.00
I guess I was asking for a miracle when I posted this question here.

The problem with just spitting out timing numbers like that, is there's no context. I know that I have to do the tuning for my specific vehicle, but as I said, I'm looking for a good base line. Is your idle 300rpm or 1500rpm, same with 30deg, are you all in super early at 2000rpm or 5000rpm?

I'm looking for someone with maybe a similar setup to mine, or with experience to help me get to a good starting point is all, I can go from there. I'm not asking anything very specific, really.

Even if you don't have the same exact thing as me, you got a super light Miata with 330 DeSoto and 6 speed, what are your numbers and what way would you tweak them for something like my cruiser? I'm looking for knowledge here for people working on this specific engine, not done sbc builder who throws 60deg to make power.

I might be just spinning my wheels here.

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Webmaster
user offline
Re: Ignition Timing Tuning
on: Fri 12 of Mar, 2021 [14:29 UTC] score: 0.00
82:
the hemi likes a max. of 30 degrees total timing, unless the dyno likes 31 or 29 better. Idle is 8 to 12, which ever makes it happy. Have fun, Bob.



> Hello All,
>
> I was wondering if anyone here has a good Timing Table for our 1st Gen Hemis?
>
> I've got a '55 331, with 10:1 compression, factory cam, Hot Heads 4bbl intake, and Holley Sniper EFI with their HyperSpark Ignition system. It's in an '82 D-150, with A-518, 3.23 gears, and is just a cruiser, street, daily driven truck.
>
> So with the HyperSpark I can create and change my own Timing Tables. Its exactly like Holleys Dominator, Terminator and HP EFI systems, if anyone has used them, just a Vacuum over RPM table. I was hoping someone may have a good Holley Timing Table I could start with for a similar application?
>
> If not, if anyone else has a set-up similar to mine (street cruiser) that knows where I should start? Like what's your Mech Adv? When does it kick in, kick out? Initial and Max Timing? Idle speed? Also Vacuum Adv curve? Then I can take that knowledge and make my own Timing Table.
>
> I do appreciate any and all help.

author message
82Dodge331
user offline
Re: Ignition Timing Tuning
on: Wed 10 of Mar, 2021 [15:47 UTC] score: 0.00

No one has any help for me? Just looking for detailed timing curve.



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