Gen3 hemi build - Timing?

About ready to start this engine
K-1 Crank and rods 4.08 stroke
Weisco piston 4.08 bore 11.1 compression
Apache heads totally stock except for springs
Comp hydraulic roller 256 in 264 ex .609 lift
Drag pack intake and holley 850
Msd hemi 6 ingnition

I have read many different total timing numbers and there is my question. Those of you with running engine where do you have total timing set at? My thoughts have been to sart at 26-28. Planed shift point to be 7500. we are fighting to get what we have bolted up to dyno. Headers may be to close together and have never seen a flywheel like that.

Start very low around 20 and work your way up.
Very efficient combustion camber that doesn't need much timing.
Matt

I have 22* total in mine. 24* made more power by 2hp but i backed it off back to 22. Your combo is the same as mine except i run ported eagle heads and a dominator. Your cam is slighly larger. Good luck. I would like to hear how it does.

Thank you very much. Sounds like I would have started with way to much. Hard to believe only 20- 22 dergrees. Some motors need about that as initial. LOL

Touchy subject. It seems every engine combo is different. I just got my kids street Gen3 fired up recently. Starts great, accelerates like crap. Started with stock programming supplied with MSD Hemi6 controller. A bunch of guys have reversed the vacuum timing curve supplied with MSD and added as much as 4-5 degrees across the board on the advance side. I split the difference on mine. Went from 12 degree vacuum retard to 5 from 0-6"hg. And zero'd out from 11-15"hg (cruise) instead of adding timing. Ramped up advance under 3,000 rpm and topped out at 32 degrees instead of 28 degrees. Engine really woke up and straightened out. 5.7 short block, SRT cam, Eagle heads, MP/Edelbrock dual quad with 2 450 Holleys, long tube headers. The best thing you can do is make minor changes a little at a time. Sure was easier and quicker with a distributor than with a laptop, though.

Intake efficiency and cylinder pressure really dictate your timing requirements.

The Modman yielded shocking cyl pressure and I was able to run 28 total and 21 initial.

The Eddy Airgap dual quad is happy with 16 initial and 23 total.