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Is my firing order correct?
Posted by: Mojan_n ()
Date: March 13, 2019 03:41PM

Picture below it belongs to my car.

I put the engine at TDC and the rotor pointed to where I connected cylinder#1 ( to right of the dist cap screw).

But when I am looking at many Corvairs engine's picture online cylinder #1 is connected to where I marked 1? ( to left of dist cap screw).

am I missing something? please let me know if my firing order is correct.

by the way car runs....

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Re: Is my firing order correct?
Posted by: cnicol ()
Date: March 13, 2019 04:18PM

It's impossible to say. The distributor can be installed so #1 is in any cap position. Wire lengths are designed so #1 is in the most rearward position.

From wherever the installer chose to put #1, the firing order is 145236 in a clockwise direction from #1.

Craig N. Coeur d'Alene ID.
66 Black Monza 4dr, 4.2L V8 49k
61 Seamist Jade Rampside 140 PG
60 Monza coupe (sold, sniff sniff)
66 Sprint Corsa convt - First car! Re-purchased 43 years later
2+2 gnatsuM 5691

+17 Tons of parts

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Re: Is my firing order correct?
Posted by: playerpage ()
Date: March 13, 2019 04:50PM

That's good to know.

I put mine back together in the right order, but I was worried about where the cap was starting, too.

Eric C. Player
Porterville, CA
- National Member, CORSA
- Member: Central Coast CORSA & South Coast CORSA
Former Member: Vintage CORSA Orange County. Member, ISA (Int. Screenwriter's Assn.), SAG Eligible, and Producer's Guild Aspirant


* Then: 1966 Corsa 180 Turbo, Red/1965 Monza 110 Purple/
1967 Monza 140 Red/1966 500 110 Black/1965 Monza 110 Yellow
* Now: 1966 Corsa 180 Turbo Project. Blue, Blue/Beige interior.



"Chevrolet's Corvair was a maverick machine, a rear-engined renegade born out of spite and genius." -- Sports Car Graphic, August 1969

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Re: Is my firing order correct?
Posted by: TerribleTed ()
Date: March 13, 2019 05:49PM

The most correct position for #1 is where the 1 to the left is in your photo (see your factory shop manual). That said the rotor must be pointing at #1 wire when the #1 cylinder is at top dead center on its compression stroke in order for the engine to run of run properly. Instructions for correctly indexing and installing the distributor are also found in your GM factory shop manual.

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Avid Corvair hobbiest since 1984.
I have personally performed ground up restoration on over 20 Corvairs.
I currently work full time at restoring and repairing Corvairs.
Located in the Atlanta Georgia area.
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Re: Is my firing order correct?
Posted by: Frank DuVal ()
Date: March 13, 2019 07:49PM

And AC cars played with #1 location vs vacuum advance location to get the vacuum advance to clear the AC belt!

Frank DuVal

Fredericksburg, VA

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Re: Is my firing order correct?
Posted by: joelsplace ()
Date: March 13, 2019 09:50PM

Frank,
I guess it would vary slightly depending on how the teeth are spaced vs the spacing of the 6 plug wires? How many teeth are on the distributor gear?

Joel
Northlake, TX
4 Ultravans, Lost count at 100 Corvairs...

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Re: Is my firing order correct?
Posted by: MattNall ()
Date: March 13, 2019 10:06PM

Nope... GM made a special gear... pin hole is moved ever so slightly!





MODERATOR
Sea Mountain, between Charleston Harbor and Coos Bay! SW Oregon Coast
Click HERE for My Website...Click HERE for My TechPages!
..............................110-PG.................................................Webered-Turbo

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Re: Is my firing order correct?
Posted by: joelsplace ()
Date: March 13, 2019 10:35PM

I only knew about the different crank gear. Are you sure there is a distributor gear also?

Joel
Northlake, TX
4 Ultravans, Lost count at 100 Corvairs...

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Re: Is my firing order correct?
Posted by: MattNall ()
Date: March 13, 2019 10:58PM

Absolutely





MODERATOR
Sea Mountain, between Charleston Harbor and Coos Bay! SW Oregon Coast
Click HERE for My Website...Click HERE for My TechPages!
..............................110-PG.................................................Webered-Turbo

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Re: Is my firing order correct?
Posted by: JimBrandberg ()
Date: March 14, 2019 04:36AM

The way you have it will work okay.

The way you wonder about will work okay too. I prefer that location so that the vacuum advance bracket is parallel to the rear frame rail. To change to that from where you are would require removing the distributor and moving the oil pump slot with a long screwdriver. You would also probably have to move your coil up in it's bracket to gain clearance for the vacuum advance at the proper timing location.

Jim Brandberg
Isanti, MN
CorvairRepair.com

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Re: Is my firing order correct?
Posted by: Mojan_n ()
Date: March 14, 2019 06:24AM

JimBrandberg Wrote:
-------------------------------------------------------
> The way you have it will work okay.
>
> The way you wonder about will work okay too. I
> prefer that location so that the vacuum advance
> bracket is parallel to the rear frame rail. To
> change to that from where you are would require
> removing the distributor and moving the oil pump
> slot with a long screwdriver. You would also
> probably have to move your coil up in it's bracket
> to gain clearance for the vacuum advance at the
> proper timing location.


Thanks

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