I have a 32 woody with a 354 hemi that i put in it. It is a mild build (ross racing pistons, ported factory heads,10.5:1CR, mild cam, 2 600cfm edlebrock carbs, and magneto dist, 93 octane). I am trying to get it dialed in and looking for some info on the timing. I have a WB02 hooked up to the car and have the AFR dialed in but i am not sure what to set the base timing or the advance. What is the recommended base timing for the engine, and whats the total timing i should be looking at. I know all engines are diff but i would like to get a feel for where i should be. I now have it at 5deg base and 20 deg advance, 25total.
Thanks, this is my first post
354 Hemi Timing question
Moderators: scottm, TrWaters, 392heminut
Re: 354 Hemi Timing question
Sorry to clarify its a Joe Hunt electronic dist, looks like magneto. I am not even sure how to change the advance...etc on the dist.
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Re: 354 Hemi Timing question
Try 10-15° initial, 35° total, how fast depends on whether it pings or not.
Vacuum advance?
Vacuum advance?
Re: 354 Hemi Timing question
No its not vacuum advance. It seems to be all electronic
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Re: 354 Hemi Timing question
On my 392 I run 10 degrees initial timing and 20 degrees advance in the distributor for a total of 30 degrees total timing, all in by 2500 RPM. When I first built the engine I talked to Bob Walker at Hot Heads about it and he said that these engines don't need more than 30 degrees total timing. Since building the engine I've made around 100 passes at the track and have experimented with the timing. I've found that 30 degrees total is pretty much optimal with my 392, 2 degrees more or less than that show up on the time slips as slower runs. I've tried this with two different cams and gotten the same results so I'm convinced that 30 degrees total is what my 392 works best with.
Owner of the Poor Man's Hemi Cuda
Re: 354 Hemi Timing question
-----------------392heminut wrote: "On my 392 I run 10 degrees initial timing and 20 degrees advance in the distributor for a total of 30 degrees total timing, all in by 2500 RPM" - (and) - "I've found that 30 degrees total is pretty much optimal with my 392, 2 degrees more or less than that show up on the time slips as slower runs. I've tried this with two different cams and gotten the same results so I'm convinced that 30 degrees total is what my 392 works best with."
And with a slightly smaller than 4 inch bore of a 392,
a 331 or 354 might (or might not) want /need just slightly
less then the '392 optimal' 30 degrees total. I imagine the
requirements would actually be pretty similar here, but just
as a general rule of thumb. the smaller the bore of an engine,
the faster the burn and the smaller amount of ignition lead
that is required.
mart
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Re: 354 Hemi Timing question
Great thanks guys. This should work out perf cause the dist is setup for 20deg advance
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Re: 354 Hemi Timing question
I believe that 30-31 degrees total is a good number. We ran 32 degrees last year on our 331 at Engine Masters. We saw no difference between 31 to 33 degrees, so we split the difference.
I'm probably old fashioned, but I like a locked out advance, even on a street driven deal. If the engine is in good tune, you can spin it up with the ignition off, and it will start instantly when supplied with spark.
Danny
I'm probably old fashioned, but I like a locked out advance, even on a street driven deal. If the engine is in good tune, you can spin it up with the ignition off, and it will start instantly when supplied with spark.
Danny