bigpoppamikebb

can anyone give me the firing order for a stock 77. is there a diagram ? what are the best plug and wires for this model ??

greyghost79

1 8 4 3 6 5 7 2. same as all chevy 350's.

Carl Granquist

The A.I.M. (assembly instruction manual) is great for stuff like this. Yes, it has a diagram. Easy to see all the engine compartment wires. Dizzy rotates clockwise as you look down on it. Driver's side, front to back, 1-3-5-7. Passenger's side, front to back, 2-4-6-8. Now follow with the 1 8 4 3 6 5 7 2 sequence.

Without you filling out your profile, it's a little harder for us to help with information. Are you using other-than-stock spark plugs? Several manufacturers of wires (e.g. Jacobs, Delco, etc.). What kind of driving style? There's a lot of folks here with tons of experience.

Trae1976

markdtn

I would buy stock Delco wires and plugs. You can get Delco wires at Advance and O'Rieleys. I have also had good luck with Moroso Blue Max wires.

rayluka

I used this exact diagram and found all my wires needed to be clocked back one spot counterclockwise on the distributor. I couldnt get it to run. My friend who is a mechanic on the pier in Long Beach saw it immediately. Maybe its my setup as the firing order is the same but #1started at the # 2 spot and so on. If it works for you dont let me confuse you, but if you run into a problem you may want to look at this as an option.

Merlinhaggard

Either the dist is off a tooth or the rotor needs to be 180'd.. Im sure you started at TDC on #1..

halfmoontrail

It makes no difference where the wires are on the distributor cap, as long as the firing order and direction are right, and if #1 sparks near TDC on its compression stroke.

Steve

PS: Plugs are plugs, wires are wires, save money.

vettebuyer6369

Why do they bother with a tech section on this forum? Seems pointless.

Trae1976

at myself, don't know why I didn't spot that. That's not my diagram, just one I found on another website to help out the OP. You are correct, that doesn't match the stock configuration. Sorry for the confustion. :o

This one is correct, just not as "clear":

Thmprr

Actually, the position of #1 on the distributor to the pass. side stems back to 1955, if you check the maintenance manual that's where it's put. The later way suits the HEI style better.
BTW did you know that you can now get HEI caps which are phased correct for cylinder position and firing order.

halfmoontrail

The first drawing is more clear to me, but it really doesn't matter...put #1 wherever it falls on the cap, and then follow it around according to the firing order.

You can drop the distributor in anywhere, and still end up with proper wire routing, usually the vac advance can is the limiting factor.

Steve

Merlinhaggard

You should start your own website. See if you can get all of the other negative people to go with you..

Otherwise thanks for your input on this subject..

bigpoppamikebb

thank you all for the great help. I will get started on this tonite about 10pm after I get off work.

427basketcase

Hey, just for grins here...what about the 4/7 cam

33Chevy

427basketcase


I was thinking the same thing...OEM SBC is: 1 8 4 3 6 5 7 2 (as mentioned).

If someone installed a 4/7 cam conversion it would be: 1-8-7-3-6-5-4-2

I did grin...but it is something to be aware of when trouble shooting.

(They say switching the firing order of 4 and 7 is worth 5 to 30 HP?, but you need the 4/7 cam installed)

dannyman

Good picture!!

You can remember the installation without a picture.

Note; looking down on the top of the distributor cap, how the distributor wire connection for number 1 cylinder is the closest connection and in-line with number 1 cylinder. This is the best position for the cap to allow for distributor timing (most uninterrupted cap movement at this position).

Firing order is written on the intake manifold, (raised numbers manufactured on the intake)

1972corvette454

Is it the same for the BB 454

moosie982

Peace,,,Moosie

dmaaero

I rembember reading on a points dist. the #1 postition points towards the #2 cylinder, on a hei dist. the #1 postition points towards the #1 cylinder.