[Goat-Racer]

When is it necessary to plumb coolant lines from the back of the heads to the front water crossover? I used to take coolant from the back of both heads and connect with a T-fitting, then to the heater core. I'm not going to have the heater hooked up for a little while and wanted to know if it's even necessary pull water off the back of the heads on a standard deck setup.

I use a Meziere pump and blocked intake to timing cover setup(high ports).

Thanks!

[JKrull66]

I have them but mine is a dry deck. Back of the block to the back of the heads.
John

[BVR421]

"When is it necessary to plumb coolant lines from the back of the heads to the front water crossover?"

I would say its a project for when you cant find anything better to do with your time.

[Goat-Racer]

So do most of you guys just block off both rear ports at the back of the heads and let all the water travel through the heads? (NON dry deck of course) Seems like a reasonable thing to do.
What makes me wonder is seeing the Kaase built Engine Masters Pontiac with four bypass lines going up to the crossover. There had to be a reason for it if he spent the time to do it.

I did'nt want to post this in the "cooling system" section of the forum because it's really more specific to a race setup and more engine related than anything else.

[BVR421]

Originally Posted by Goat-Racer

So do most of you guys just block off both rear ports at the back of the heads and let all the water travel through the heads? (NON dry deck of course) Seems like a reasonable thing to do.
What makes me wonder is seeing the Kaase built Engine Masters Pontiac with four bypass lines going up to the crossover. There had to be a reason for it if he spent the time to do it.

I did'nt want to post this in the "cooling system" section of the forum because it's really more specific to a race setup and more engine related than anything else.

Brian I think the reason Kaase did that is to try to cool the combustion chambers. Those guys were running like 13-1 compression and trying to use 92 octane. Taking extreme measures to prevent detonation everywhere!
What prompted the question? Are you having any cooling problem? I can see doing circulation changes/improvements if a car is expected to be on the street everyday but I dont know if you go cruising with yours?
One of the PY members was selling some nice water outlets ready for an fittings, I forgot his name. He recently had an ad in the classified. There has been quite a few posts and pics of the way guys run water from back to front under the intake. I like the way you said you ran both heads into the heater, that seems like a smart way to do it. If you go back to using a heater be sure to have a restriction like the factory did or the heater core will blow out. Look at the factory head nipples to the heater they were really pinched off to restrict flow.
That bypass you had to plug in the crossover at the front of the timing cover was only used to bypass the T-stat for a quicker warmup anyway so dont worry about that deal. I had to do the same to mine. Those HiPorts are HIGH LOL.

[Goat-Racer]

No cooling issues, just trying to keep as far away from detonation as I can. I'm 11.5:1 on 91 octane, and I drive the car quite a bit. Just looking for some insurance.
I hooked up a pair of -6 lines into a single -6 going up to the crossover using stuff I had laying around.
I was going to leave the heater core disconnected for awhile, so I was just trying to figure out If I even needed to do the external line deal to replace what I had.

Thanks for your help!