foney_email

My firing order is 1-8-6-2-7-3-4-5

The firing orders I have seen on the internet are

1-8-4-3-6-5-2-7

The car has run fine with the original order. I have raced it many many times with that order. Is there a reason it is not the normal 350 firing order?

It is carbed HEI non computer controled

RB83L69

Not possible unless you have an extremely custom ground crank and cam.

Are you counting the cylinders correctly? Where is #2 in your engine?

{edit} Yes that's it, as I compare the numbers you posted, they are the correct firing order, except numbered as if by F*rd. Those people number 1234 down the left and 5678 down the right; GM uses 1357 on the left and 2468 on the right.

Mkos1980

iTrader: (8)

Both those orders are wrong. I think its suppose to be 1-8-4-3-6-5-7-2

SSC

Yea your right but as RB83L69 pointed out if you were to think in fNord firing order where the cylinders are numbered differently they would be 1-8-6-2-7-3-4-5. Oh well at least Dodge got it right.

Vader

Yup, Mkos, all mine are that way, too.

Bort62

Great Jpg, Vader.

Saved

Mkos1980

iTrader: (8)

Whats weird was when i was timing my boat motors, one checked out at 8* and the other was -8* and here the left motor was revese rotation so it was 1-2-7-5-6-3-4-8

AlkyIROC

#1 cylinder is always the one that's at the front of the block. If you look at a V8 Chev you can see the driver side cylinder is ahead of the passenger side. It has to do with the con rods on the crank.

In a Ford engine the #1 cylinder is on the passenger side.

After finding #1 you just have to know how the engine's cylinders are numbered (mentioned above) and then the actual firing order.

Chev uses 18436572 however you can get a custom camshaft to change the firing order so that the cylinders get a better balance of air/fuel with a firing order of 18736542. Simply swapping 7 and 4 around can make more HP.

A lot of boat engines are run in reverse order so that the engine can be run backwards (another custom cam). It has to do with the way the prop is pitched. Also dual engines will have one going clockwise and the other counterclockwise.

StangKiller

I don't doubt you but if that's the case how come it's not done more often? I'm sure GM and Mopar use 18436572 for a reason, maybe it runs smoother that way?? Just wondering.

Guest

Notice the LS1 firing order matches that of the later Windsor Ford engines, if you follow the cylinders and ignore the numbers. GM did this for the same reason Ford did years ago, its smoother and wears the main bearings less. I'm not sure about the firing order Stephen posted, but its probably along those lines as well.

In other words, just because they did it that way doesnt mean its the best way.

Vader

...And the same as the Cadillac engines from 40 years ago. It doesn't really matter with an even-fire V-8 (except in a radial arrangement) how you order the firing, you'll always have two adjacent cylinders firing in sequence, so bottom end wear is not really an issue.

You'd think a V-10 would be smoother, but Chrysler managed to screw that up, too, since they cast a 90° block for it and made it an odd-fire (no offsets in the crank throws). That's whay a Viper sounds like a gang on miniature Harleys putting off in the distance, and possibly why the smaller yet smoother LS1/6 makes a lot more power per cubic inch. Even a BBC will take a V-10 Mopar to lunch in HP and torque. A 60° V-12 - now that would be the nuts...

foney_email

yeah, I felt pretty dumb. I didn't know that a chevy had even pistons on one side and odd on the other. I got it now. Thanks for all that aditional information too, guys. I found that pretty interesting, but I like stuff like that.

I like to have conversations like that when my car buddies and I hang out; now I have some new facts to talk about. I always knowing odd things they don't.