Can you guys post some pictures of the way you plumb the rear intake water lines for better water movement? I have never liked how the cooland just dead heads at the rear of the intake from the heads. I plan on doint this to my nxt build just to aid in water flow.

Kasey

Here's a picture of my old W5 manifold. On some of my other manifolds the coil bracket pedestal would have to be milled off because it covers the rt rear water outlet. Easy fix that cooled at least 10 to 15 degrees better.

That looks good, does anyone have any others, I was thinking of running the lines under the intake, but will that heat up the bottom of the carb then??

Kasey

The rear of my hoses look just like blucudas, plumbed the same way, heres a picture of the front of the hoses. I think going under the intake would put unnecessary heat under the carb.

Doesn't plumbing to the center also provide benefits? ( since middle exhaust ports are centered?)

Mine

please explain the path of coolant and why that lowers engine temperature.

by not having a dead end,it allows more water to flow into the radiator.

I was accually going to have a cross over from left to right, then have a Y fitting and go to the t stat housing. I know it going to kinda bypass the thermostat, but it keeps the water from "piling up" on itself from dead heading into the intake, and creating a more even flow throughout the engine. Accually after looking at the cool spacer in the above intake, I can make a cross over at the rear of the intake, and "T" it into a single line going to the front of the intake to the t stat, and have a cleaner look, and still have the function of the T stat.



Kasey

The heads do cool last. I think this mod helps take some of the water from the back, not all of it. Which should help reduce heat build up at the front of the heads. JMO on that. All I know for sure is the motor does run cooler. Jim

I know this mod works, and I do understand water flow, and slowing the water down to "pull" heat out of the block, but the dead stop in the head is what bothers me, You are still utilizing the stat, or gutted stat as a restriction, and its not like we are using a -10 line for the water so its all restricted. Im just wanting to even out the water flow, and stop the dead spot. I really think that a cross over, and a "T" to the stat housing will work great, If not, Ill just do the sweeping lines from rear to front. I know that if water is flowing over itself, and has no place to go its going to want to stay there and get hot. Its like in science class when we made models of rivers, where there was a back drop in the river, the water never moved, and it just sat stagnent, now add head, and its just going to cause hot spots. If you give the water a way to flow, all the water is moving throughout the entire "cycle" and there is no captured water to get hot, its all flowing through the radiator and cooling off.

Just my thought process on the whole reasoning behind this modification.

Kasey

I am using -6 and I did not notice any cooler temps but it cools down faster between fan cycles.I did it mostly to remove air.

You have to install a soft plug in the deck of the block at the rear most water hole to redirect the flow to make this effective. Your trying to get even cooling of the heads with this mod. Be sure to drill a small hole in the plug to let air escape. There are pictures of this somewhere on here.

Go to Alcohol......cooling problem solved.

here are some pics of the line that where done on my ex iroc series engine

2

You have to install a soft plug in the deck of the block at the rear most water hole to redirect the flow to make this effective.


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can you elaborate on this.
I'm not sure what you are saying needs to be done.

If you have a bare block around look at the biggest coolant hole towards the back of the block on each bank. I think it close to 5/8's or so. Go find a soft (freeze type) plug to fit this hole. Drill a small hole to eliminate air pockets and tap it in. Drill the manifold and run lines to the thermostat housing, install the heads and manifold and your set. An Indy intake has the bosses cast and ready to drill. This is a simple mod that will make your heads happy.