Reverse cooling

[SonnyGlide]

Well I had to do it....
tried the reverse cooling on my 406:(
went "in" at the water crossover jacket on the intake manifold< 1 on ea. side
to flow water to both sides evenly, then "out" at the old water pump locations, 1 hose to the transome ea. side + ball valves to adjust temps.

prob: I was using my house water to supply the H2o, sure U've all done that, but the front of the heads ran much cooler then the rears,.... way cooler.
I was able to regulate the temps to 150, but still saw the heads running cooler front & very, very warm rear.

I'm going back to water "in" at the water pump location, and "out" using the 2
AN fittings on the water crossover jacket + Ball valves to controll temps.

let me make a notation here, due to my Coyles 3 gear cam drive, I run a ShoGun elect water pump, so the tried and true cam cover water pump isn't used, and my Dart/World Iron heads have no provision to plum N2 the heads for some of the more conventional Reverse flow systems U've probable scene.

the mill was already assembled when I got it, and being a 406 sbc, that was built by a Sprint Car shop, I'm sure they already drilled the steam holes< Witcher eng. moved to some where and I cant verify....

But If Ur thinking about the Reverse Flow system in ur Boat...been there done that, as far as I'm concerned, dont waste Ur time, I did the R&D 4ya;)

[FC-Pilot]

Thanks for the info. The idea has been kicked around quite a bit and it is nice to hear someone that tried it. This way we have hear exactly what happens. Thanks

Paul

[warpt71]

You know I think my BBC heads run cooler at one end than the other? Its been a wile sense Iv been out in it. Its plumed the conventional way, in at the factory water pump inlets and out through the T-stat housing. Have you ran it plumbed non reverse flow yet? Be curious to see the differences

[rastas]

I run cooling from pump to manifolds and out of manifolds to the bottom bungs on my small block, I have noticed that the temp doesn't run as cool as a lot of other boats I have seen.
Should they be run into the original waterpump holes as people have stated or have people seen them run to the bottom of the block?

[RiverRacer]

Reverse cooling is quite common but you need to plumb it right, like the simple no brainer way, just use the block drain holes for the feed and dump out the intake manifold, bada bing done deal!.. This method is really cool too because it drains the block automatically when you're done!..:D

[warpt71]

Thats exactly how my boat was plumbed when I got it, it must have worked for him!!!

[RiverRacer]

Thats exactly how my boat was plumbed when I got it, it must have worked for him!!!

Yeah it works, seen a lot of them done that way, everyone I've talked to about it said the best part was draining the block when done, don't have to mess with poppin the drain plugs, which is a pain in the ass, lol....

[SonnyGlide]

thought about that, using the drain holes, but the bullet is in the hull,
their only 1/4npt...they should B at least 3/8 right?

and I run an Armandos 12 qt pan, the dip stick is on the outside of the pan, right next to the drain plug:( just can't get there from here, and the drilling-tapping out etc. will have to pull the mill to get at the drains...think I'll try the other way next, but I understand the drain plug area, if the 1/4 npt would work, I'll try it, I think a AN-6 or -8 1/4 npt 90 should miss the dip stick.

[RiverRacer]

Yeah you want -08 going in, no biggie to drill and tap them I'd just pull the motor!..

[SonnyGlide]

I got some -8 90's I'll C if the dip stick is an issue,
just block off the water pump boss and exit out the 2 90's on the manifold?

[RiverRacer]

I got some -8 90's I'll C if the dip stick is an issue,
just block off the water pump boss and exit out the 2 90's on the manifold?

Yep!.......

[SonnyGlide]

went w/the conventional plumbing> water in at the block< water pump holes and out the 2 AN-8 hoses on the manifold, heads R warm front at back and can hold 150 on temps.

when I pull the mill next time, I'll seriously look at the drain plug mod.