611 CID Thor Headed Engine Build...

cool40 wrote:Is it hurt?

nope. Would have been fun there was some heavy hitters there. Apparently one truck called the BOSS really wanted to see it run.

2 pulls.  2 First place finishes. Put 17 ft on 2nd place, 309ft to 292. Second place was a 650CID Bamber Hemi headed build.

Straubtech wrote:2 pulls.  2 First place finishes.

Awesome!! Good job!!

Sweet!
60K should come in first place a few times.

Cheers

windsor wrote:Beautiful piece.

Just wondering why you stayed with a standard distributor instead of a belt driven?  

Since the dist. runs off the front of the cam and this is a dry sump and crank trigger there really isn't a need for a belt drive dist. IMO.

Scott Foxwell wrote:

Is that the firing order on the front of the intake? 1 5 4 8 6 3 7 2

Good looking rig!

68formalGT wrote:

Scott Foxwell wrote:

Is that the firing order on the front of the intake? 1 5 4 8 6 3 7 2

Good looking rig!

Yes it is.

Scott Foxwell wrote:

68formalGT wrote:

Scott Foxwell wrote:

Is that the firing order on the front of the intake? 1 5 4 8 6 3 7 2

Good looking rig!

Yes it is.

When should you go to the flathead firing order?

We use that firing order on my car. sounds different for sure.

The flat head ford firing order is the preferred deal.

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

It's what the chevy guys call a 4/7 swap.

Lem Evans wrote:The flat head ford firing order is the preferred deal.

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

It's what the chevy guys all a 4/7 swap.

What's the reasoning behind changing the firing order ?

John Myrick wrote:

Lem Evans wrote:The flat head ford firing order is the preferred deal.

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

It's what the chevy guys all a 4/7 swap.

What's the reasoning behind changing the firing order ?

Changes crank pulsing and also fuel distribution in the intake. Only of any real benefit when you're trying to build max power at high rpm.

Thanks

The crankshafts in very high HP engines seem to have a longer life with the 2/8 swap also.

Same deal with my Ford 7.3 diesel, well almost...
The 7-8 cylinders firing in sequence would drop line pressure from one bank of the high pressure oil system for the Heui injection system. It would made for an unstable idle, most owners used a balance tube between the heads to equalize the pulsations or pressure drop between the heads for the hydraulically operated injectors.


Real world question....

I build a 700hp BBF, I spray this motor a couple hundred more horsepower, put the engine under load all the time and the engine sees constant 2500-4000 rpm usage with blasts from idle to redline.
In theory the crank has less stress, the fueling or tune becomes much better, all from the cost of switching out a camshaft and moving around some plug wires?
Say I gain no horsepower, does the above engine benefit in anyway from this Flathead firing order change on this non max build, if so how and where? Cap Walk?
Or does it?

XF-66 wrote:Same deal with my Ford 7.3 diesel, well almost...
The 7-8 cylinders firing in sequence would drop line pressure from one bank of the high pressure oil system for the Heui injection system. It would made for an unstable idle, most owners used a balance tube between the heads to equalize the pulsations or pressure drop between the heads for the hydraulically operated injectors.


Real world question....

I build a 700hp BBF, I spray this motor a couple hundred more horsepower, put the engine under load all the time and the engine sees constant 2500-4000 rpm usage with blasts from idle to redline.
In theory the crank has less stress, the fueling or tune becomes much better, all from the cost of switching out a camshaft and moving around some plug wires?
Say I gain no horsepower, does the above engine benefit in anyway from this Flathead firing order change on this non max build, if so how and where? Cap Walk?
Or does it?

Probably not.