Rear Crossover on intake manifold
10-22-2007, 08:59 PM
#1
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Rear Crossover on intake manifold
Anyone ever put a rear crossover tube on the back of the intake manifold to help eliminate hot spots in the cooling system (heads) and have a more even water temp. You would run a tube from one side to the other with a T in the middle and run a small discharge hose overboard.
Mike
Mike
10-22-2007, 09:33 PM
#2
Ginger or Mary Ann?
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I ran tubes from the rear passages up to the front passages. I'd think your's would work better. Just didn't want to add any dump ports in the hull.
Last edited by US1 Fountain; 12-02-2011 at 11:13 AM.
10-22-2007, 09:47 PM
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Can't view you pic, but I get the idea. I think running a dump would help with high water pressure also. I peg the gauge at wot.
10-23-2007, 12:51 PM
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10-23-2007, 12:56 PM
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I have run mine from the rear to the front 3/8 lines work well. Others I have known to just dump them over board. Dyno testing proved without mild and up built BBCs didnt last long without the mod.
10-23-2007, 03:51 PM
#6
Ginger or Mary Ann?
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I agree with it lowering the water pressure. I did not have a pressure problem, so it wasn't a factor on my setup. I know of 1 member who did dump the rear jackets into the exhaust tubes at the transom for a cleaner look and to control his pressure.
My current boat also pegged the WP gauge at 3500rpm. Stock 502MPI's. Easiest fix was the Merc relief valves.
10-23-2007, 07:47 PM
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10-23-2007, 08:09 PM
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We have been doing that for years. I usually run # 8 Aeroquip hose from front to rear. As discussed earlier this mod works very well for equalizing chamber temps. It will never hurt you.
10-23-2007, 11:54 PM
#10
On my Scarab I ran a #12 from the rear to the front T ing into the front then going to the headers.
My Hustler Whipples came with a 1/4 line dumping overboard.
I guess its releaving steam/air pockets.
Scarab pick ya kinda can see the #12 T fitting on the front
My Hustler Whipples came with a 1/4 line dumping overboard.
I guess its releaving steam/air pockets.
Scarab pick ya kinda can see the #12 T fitting on the front
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