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Re: Hi, I'm a new member. Want to do a rear mount 4.3 v6 in an EM
Posted by: Raycr ()
Date: July 12, 2018 07:07PM

There are several rear 4.3 engine set ups on this and other sites. Check them all out. There are many ideas on how to set it all up. We're running a PG with a Mid Engineering adaptor that we picked up from Clarks.
We have the radiator mounted in the back. So far this is an untested set up on the street

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Re: Hi, I'm a new member. Want to do a rear mount 4.3 v6 in an EM
Posted by: Charlie Kelly ()
Date: July 13, 2018 05:22PM

Yes i noticed the front license plate makes the perfect air scoop area.
Good thing we don't have front plates in PA.

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Re: Hi, I'm a new member. Want to do a rear mount 4.3 v6 in an EM
Posted by: Charlie Kelly ()
Date: July 13, 2018 05:26PM

Raycr Wrote:
-------------------------------------------------------
> There are several rear 4.3 engine set ups on this
> and other sites. Check them all out. There are
> many ideas on how to set it all up. We're running
> a PG with a Mid Engineering adaptor that we picked
> up from Clarks.
> We have the radiator mounted in the back. So far
> this is an untested set up on the street


Thanks for the picture. I was actually wondering how to orient the carb and it looks like you had no problem putting it backwards. Is that intake manifold a
[www.summitracing.com] ?

Also if you don't mind me pestering you, what CFM is that Holley? Unfortunately i only have a 600 vacuum secondary laying around and i think it might be too much.

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Re: Hi, I'm a new member. Want to do a rear mount 4.3 v6 in an EM
Posted by: Raycr ()
Date: July 13, 2018 06:12PM

That is a 600 on there, I don't remember the model number. It's the one with the secondary metering plate instead of the block.
That is an Edelbrock 2111 with 1/2 inch taken off the carb pad. If you run a small cap dist there's plenty of room.
If you run a large cap there is very little space.
We are running a Vette water pump, later 80s 5.7 I think. It would have been for a serpentine belt drive but with V belts on short water pump pulleys it turns the right way

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Re: Hi, I'm a new member. Want to do a rear mount 4.3 v6 in an EM
Posted by: Charlie Kelly ()
Date: July 13, 2018 08:18PM

Thanks! That's the same carb i have.
Are you saying that that's a standard rotation water pump?

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Re: Hi, I'm a new member. Want to do a rear mount 4.3 v6 in an EM
Posted by: OttawaCorvairGuy ()
Date: July 13, 2018 08:44PM

Charlie,

If you can afford it, it would be worth getting a rebuilt reverse 4.3 from Summit.

Mass producing helps bring the cost down a lot. I would think you would want drive this vehicle a lot and want it to last a long time. Having it already rebuilt will help you to finish your project that much faster and the rebuilt comes with a warranty and does not cost too much.... Plus it looks like you already have a core.


Good luck,
Tony

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Re: Hi, I'm a new member. Want to do a rear mount 4.3 v6 in an EM
Posted by: Charlie Kelly ()
Date: July 13, 2018 09:32PM

That's a good idea but i had this motor laying around and if i can go to school in August like i plan i can get a bunch of rookies to reverse my 4.3.

On second thought, who knows how well that will turn out.

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Re: Hi, I'm a new member. Want to do a rear mount 4.3 v6 in an EM
Posted by: Seth Emerson ()
Date: July 14, 2018 12:02AM

Charlie - the 1985-1991 5.7 Corvette used a short shaft design and was designed to rotate opposite of the crankshaft - It was driven on the back side of a serpentine belt. If you drive it via a V-belt, or the ribbed side of a serpentine belt. it turns the same direction as the crank. Since the crank on the reverse rotated 4.3 will be going the opposite direction from the Corvette, the water pump will merrily be rotating in it's original design direction. Note that aftermarket pulleys may or may not fit. In order to keep folks from installing this reverse pump on a regular motor, the drive shaft in the middle of the pump is larger in diameter, so the pulley might not slide over. They also used a larger 4-bolt pattern on the drive flange. Many of the aftermarket pulleys have both 4-bolt patterns machined in.

Seth Emerson

Check my new Performance Corvair Web site [www.perfvair.com]

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Re: Hi, I'm a new member. Want to do a rear mount 4.3 v6 in an EM
Posted by: Charlie Kelly ()
Date: July 14, 2018 01:16AM

Thanks Seth. It's almost like Chevy had a rear small block Corvair in mind when they designed the C4.

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Re: Hi, I'm a new member. Want to do a rear mount 4.3 v6 in an EM
Posted by: Ed Dowds ()
Date: July 14, 2018 06:08PM

The Corvette pump is also slightly longer than the standard early short pump.
You may have to shim the crank pulley to line it up with the pump pulley.

Ed
Hillsborough, NJ
66 500 rear 4.3 V6 Corvair
69 350/350 TH Camaro was RS
30 Model A Ford Streetrod 350/400 TH
88 Celebrity Wagon (Daily Driver)

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Re: Hi, I'm a new member. Want to do a rear mount 4.3 v6 in an EM
Posted by: OttawaCorvairGuy ()
Date: July 14, 2018 06:14PM

Charlie Kelly Wrote:
-------------------------------------------------------
> That's a good idea but i had this motor laying
> around and if i can go to school in August like i
> plan i can get a bunch of rookies to reverse my
> 4.3.
>
> On second thought, who knows how well that will
> turn out.


Charlie,

I'm not telling you what to do. Merely sharing my personal experience.

I'm a retired ASE mechanic who also happened to have worked with a friend of mine in an Engine R&R shop.

Most of the time, but not all of the time.
You can buy a rebuilt engine from one of the large rebuilders for less than you can rebuild one yourself.
Plus it saves a lot of down time waiting for the machine shop to get your stuff done.
You also get a warranty - unlike when you build one.
Add to that the money you can save to be used elsewhere for other stuff to finish your project sooner...



Edited 1 time(s). Last edit at 07/14/2018 06:18PM by OttawaCorvairGuy.

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Re: Hi, I'm a new member. Want to do a rear mount 4.3 v6 in an EM
Posted by: Charlie Kelly ()
Date: July 16, 2018 12:13AM

Looks like i'll be avoiding electric fuel pumps for the rest of my life.

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Re: Hi, I'm a new member. Want to do a rear mount 4.3 v6 in an EM
Posted by: moomba32 ()
Date: July 16, 2018 01:50AM

Bummer, that looks like it was a bad day.

Don Marlowe
66 Monza 2Dr 140/pg
64 Spyder convertible now, 110/pg
Eutawville SC

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Re: Hi, I'm a new member. Want to do a rear mount 4.3 v6 in an EM
Posted by: Charlie Kelly ()
Date: July 16, 2018 02:34AM

That was my first and only motorcycle. The wound cut deep but honestly that thing was a pain in the ass and was breaking down every other day.

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