Intake cooling mod. Opinions wanted

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fishy68

fishy68

Tyr Fryr's Inc.
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I see where some guys are drilling out the back of the intake manifolds and installing fittings to run a hose accross the sides to connect the rear coolant ports of the heads. What do you guys know about this mod? Is this considered a race mod or is it valuable for a street engine also? My 360 with a good 3 core rad. runs 200-210 in the summer months. I'd like to lower that if possible but there's not enough room to go with a 4 core rad. I was also thinking about adding the flow cooler disc to the water pump. Anybody tried one of them yet?
 
I have the necessary fittings to do so. I really now don't feel like pulling the intake to do this, so i'll hold off for awhile lol. I've been told 10* differences, its no cure for a insufficient fan or radiator in my opinion however. It can't hurt from what i understand..

intake.jpg
 
oh i also have a flowkooler disc, seems to work fine, cheap. I rebuild my engine with it so i cant say a yes or no as far as better or worse. Just another, cheap, 'can't hurt' mod when i built it. I also have a highflow, balanced t-stat that i was recommended to run if i had low gearing to keep the pressure from closing the t-stat up during highway cruise.
 
Thanks for the input Mike. The only thing I'm not sure about is where to get that spacer under the thermostat housing. Where did you get the spacer at? Right now my intake is off so it's an oppertune time to do it.

Same thing I was thinking about the flowcooler disc. Can't hurt and it's cheap.
 
"I have the necessary fittings to do so. I really now don't feel like pulling the intake to do this, so i'll hold off for awhile "


Thats not mine :D. Mine will be plumbed to the heater hose fittings..
 
fishy68 said:
The only thing I'm not sure about is where to get that spacer under the thermostat housing. Where did you get the spacer at? Right now my intake is off so it's an oppertune time to do it.

Same thing I was thinking about the flowcooler disc. Can't hurt and it's cheap.
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I used the Flow Cooler pump. I was upset at the short life span. The welds on the plate to impeler broke quickly. But it did work as advertised.
The thermo stat spacer can be found in the Jegs/Summit catologs in cooling or circle track. Something in the back of my head says a chevy part will work.

The only thing I read on the cooling mod is the head/engine like the water taken out of the center since you have 2 exhaust ports together rather than the ends. I only read that. (Engines manual I think.)
 
I just got done with mine .Everyone I talked to said it works 10-15deg .They talk about it in the big small blk book.The spacer is chevy and the thermo housing .They both use oring gaskets but i will use paper.

port intake 006.jpg
 
Yeah Rumble don't blame you. It should've lasted longer for what it costs. I'll check out the catalogs for the spacer.

Scamp408 that's exactly what I need. I have the air Gap too. Slick looking job you did there.

Scamp where do you get the book you refered too? I think I've heard of it but never saw it anywhere.
 
Thank you The book is called how to build big in small blk mopar blue cover.The auther talks about it but no good pics .Their is another mopar site I cant remember and he dicusses it in full detail.I think it was in the circle track sec .
 
scamp 408 said:
Thank you The book is called how to build big in small blk mopar blue cover.The auther talks about it but no good pics .Their is another mopar site I cant remember and he dicusses it in full detail.I think it was in the circle track sec .
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Ok I've seen that book but haven't read it. I'll check it out. Thanks
 
Thanks I brought the hose in and under so I had no problems hitting the carb.I dont know if I am going to use the spacer.The other pic s is good as long as it works.Now I have to pull my old manifold off a good running motor.Always messing with something.
 
Scamp thanks for the hint about the thread on Moparchat. I checked it out and it is great info. Ole Sanborn sure is sharp.

Dusterboy in the thread on moparchat he talks about several cooling mods, not just this one. He says their good for a street and strip engine also. Go to www.moparchat.com and check it out in the circle track section.
 
I got the new manifold on this weekend . Have to wait to run it some pics

new intake 003.jpg


new intake.jpg
 
I guess I don't quite understand this one. First, every drop of coolant traveling through theose hoses is NOT going through the heads. That means there is less flow around the exhaust ports. How much warmer do those need to be? Second, by routing these hoses through the gap in an air-gap intake you are now running hot water through an area you were trying to keep cool with the gap. But like I say, maybe I'm missing something here.

BTW Scamp 408, sure looks like a high quality installation.
 
From what i been reading and looking at cooling path direction pics is that the water pump pushes water through the block up to the heads .The water in the back of the heads has to go to the frt of the heads to the thermo than out. By the time that happens sometime the coolant turns to steam or sits and creates hot spot in the back of the head.All I did was make an exit for collant to flow out .The water cant cool anything unless it flows through the system. This mod has been done for years most of the chevy/ford manifolds have ports for this .As far as the hoses heating of thw manifold i think will be minimal . Thanks for the props on the install.
 
Hmmmm... So now I'm intrigued. Let us know how it works. With 4 of the appropriate AN caps you could remove the system for a "before and after" type comparison.
 
C130 Chief said:
Hmmmm... So now I'm intrigued. Let us know how it works. With 4 of the appropriate AN caps you could remove the system for a "before and after" type comparison.
Click to expand...

Very good idea to test it with and without it. If he don't try it I will when I get mine together. That will probably be 4-6 weeks though.
 
I got it done and fired it up .It stayed the same temp But it came down faster.I dont run a thermo I have a electric fan and set it to come on at 200 and shut off at 185.When the fan came on the temp came down faster than before .I may try a diff temp sensor I have one for 185on 170off. Also 88deg outside and I was testing in the sun
 
I wonder if using too large of hose would make the coolant bypass or slow down
thru the head? Thus causing the same problem somewhere else. A smaller diameter hose would allow pressure and stem to be released ,yet still force a majority of the coolant thru the head.

Just a thought
 
scamp 408 said:
I got the new manifold on this weekend . Have to wait to run it some pics
Click to expand...
that is cool. 1 more Q, where is the stat? above or below the spacer?
 
mbaird said:
I wonder if using too large of hose would make the coolant bypass or slow down
thru the head? Thus causing the same problem somewhere else. A smaller diameter hose would allow pressure and stem to be released ,yet still force a majority of the coolant thru the head.

Just a thought
Click to expand...

Considering the front coolant passage in the heads/intake is fairly large I would think to keep things equal you'd need to run a 1/2" hose otherwise your flowing more through the front compared to the rear.
 
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