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Discussion Starter #1
Ok, so I finally got my transmission valve body issue straightened out, and I took the car out for a quick romp yesterday afternoon. This gave me the time to realize that I have a cooling issue to address now as well. The car will not cool down, regardless of moving or sitting. Here's a rundown of the combo:

306ci, stock block, crank, .030 hyper pistons
GT40P heads, light bowl work
Stock intake/tb - EGR delete spacer
1.6 Roller Rockers
FRPP X303 camshaft
twin .50 trim turbos
72lb siemens injectors
Aeromotive rails

Electronics:
Stock TFI distributor w/MSD cap/rotor
MSD 6A Ignition box
MSD Blaster 2 coil
Megasquirt II
PLX SM-AFR Wideband

Cooling system:
CSR electric pump
Stock radiator
electric fan
large FMIC (2 in, 1 out)
oil cooler
trans cooler

I first noticed that after warming it up (190 or so), I could turn the car off, and there would be 0 pressure on the radiator cap. I assumed it was a faulty cap and that was causing the issue, so I went and bought another cap. I have not rechecked the pressure by pulling the cap, but the upper radiator hose doesn't feel any more firm than before. I've verified that I installed the head gaskets correctly, and I've bled the system. An air bubble is still a possibility, but I doubt it. Also, I know I have a lot of crap to have in front of a radiator, but I couldn't find anywhere else to mount the coolers. So I have a couple of options here to try to help the thing out:

1) Find new mounting spots for the oil/trans coolers (don't have a clue where)
2) Upgrade to an Aluminum radiator and a taurus fan setup.

Any other suggestions/ideas? Also, any idea on why I'm not building pressure in the cooling system?
 

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Discussion Starter #2
..and the plot thickens!

Pressure tested the cooling system. Pumped it up with a tester, then let it sit for 20 minutes. System still had pressure when I came back to it. I can't test the cap to see where it opens at because the pressure gauge on the tester is bad. I know it's not holding much, one pump seems to open it up. I'm wondering if my brand new radiator cap is bad.
 

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make sure you did not put T-stat in backwards.

I did that once and it caused all kinds of strange cooling and system pressure quirks.
Took forever to figure it out.

New cap may be bad. Shyt happens
 

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Discussion Starter #4
make sure you did not put T-stat in backwards.

I did that once and it caused all kinds of strange cooling and system pressure quirks.
Took forever to figure it out.

New cap may be bad. Shyt happens
I made sure when I put it together I didn't put the t-stat in backwards lol - I should've mentioned that I guess. When I get home, I'm going to plug the puke tank line and see if it builds pressure then. If it does, then I know the issue is the cap. If not, then I'll pull and triple check the t-stat haha.
 

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Discussion Starter #5
Anyone got any ideas/pictures of oil & trans cooler mounting points? I've got them both in front of the radiator right now ; I'd like to move them out of the way but I'm stumped as to where to put them where they'll get any airflow.
 

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Stock radiator is killing you... Mine would cool fine sitting but would get hot driving Put an aluminum radiator in and ill know soon if that fixed it
 

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What elec fan are you running? What alt are you running?
 

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Discussion Starter #8
3G alt
TO be honest, I don't know what brand the fan is ; I used it on another car years ago. I'd guess it's an autozone special. I solved the pressure issue with another new radiator cap, but I'm gonna put a new radiator anyway, and probably get a mark VIII fan setup.
 

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I would say your fan is the biggest problem right now.
 
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