A friend of mine bought a 34' Ford coupe dirt track car. The car looks like it just came off the track in 1955. The guy he bought it from said he bought it in Columbus, Ohio over 20 yrs ago and it's been sitting in his barn till he bought it. The car has a Ford/Merc V-8 flathead with two deuces and a GM HEI dist. To fire the spark. The car runs great, starts right up, no miss or backfire. The stock firing order for a flathead is1-5-4-8-6-3-7-2 This car's firing order is 1-2-5-4-8-6-3-7 Why was the firing order changed ? For what purpose ? Appreciate any and all replies
that really doesn;t make sense . did you try it with the original order ? it might seem to run ok with the 12548637 order but you might find out it runs much better with the stock order. the other way to check is bring #1 up on compression then in the right rotation see what cly. comes up next on compression that will answer your question wether its #2 OR #5.
no thats wrong the rt. bank is 1234 and the left bank is 5678 being the right bank is the passenger side.
have you checked to make sure your not looking at a GM HEI corrected cap....very confusing if you don't know what's happening....
The flathead and the chevy fire in the same order. Just get number 5 flathead on firing and wire like a chevy with 1 starting at the Ford 5.
I number my flathead cylinders the way they should be according to the crank order front to back. Just like my 265 & 413. Except the firing order is 1-8-7-3-6-5-4-2 instead of 1-8-4-3-6-5-7-2. Why do I do this?, you might ask. Because I can. And I remember it better for some reason. I guess some later model GM v-8's have the ford firing order. Why did they do this? Who knows? Jack E/NJ
Heres the firing order straight off one of my '37 21 stud heads. I'm sure all flatheads would be the same? At least the 21 - 24 studs.
The firing order is built by where you put the wires in the cap, dosen't matter where the dist is from or its past history firing order..Doubt if its got a flat crank..
you guys missed the clue at the start of this thread....GM HEI. the corrected cap has wires exiting in a different way. At first glance the firing order may not be right, but if you understand that the corrected cap is NOT FIRING IN A VISUAL CIRCLE due to the internal cross connections in the cap, you can see where the confusion starts...
I appreciate the quick replies. We have tried the original or factory firing order The engine wouldn't start, backfired etc. Just seemed strange and it didn't make sense the firing order is what it is. I think to leave well enough alone and enjoy the hech out of it
The reason gm has gone to the ford firing order is because of the intake stroke timing and ergo the "signal" generated in the intake manifold......makes more power in some big block applications, probably same thing on the street.....more hp. For less fuel ....as for the flatly the only way the actual firing order is altered is if the cam were ground with that in mind...and it would need to be a new casting or forging with totally different lobe timing.......not likely.....this problem stems from the rodent engine parts infestation! Posted using the Full Custom H.A.M.B. App!
A V8 fires every quarter turn of the crank. on a flat head you can't get 1,2,and 5 to be at tdc by turning a quarter turn each time
Hey, I got a number off the HEI cap 9595G18 .. Only number I found on it. What a " corrected cap " mean ? Thanks again for all the help
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