I am doing some pretty major mods to my car right now and I have noticed that while I have the motor out it would be a good time to replace the coolant....What my question is which coolant will keep my car the coolest? I have a 160* Tstat but would still like to make sure it ran as cool as possible.

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ZZP 3.1 MPS, 2.5" catless exhaust, TOG's, XP hot cam, 105# springs and mod'd retainers, ZZP pcm, alt voltage booster, Wizaired intake, heads lightly ported and 3 angle valve job, PRJ 10.4's, ummm

changing coolant won't help it cool better, and keeping the car cold doesn't do anything for performance (just fools the computer into dumping more fuel)

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Steve
'97 GTP VS cam, ZZP PCM, and not much else yet

yes get all the dexcool out of there. you can do a search for the Dexcool threads....

I would change it out to normal green coolant. your radiator will thank you!

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2001 GTP street car- GT45 turbo,Stage 4 Intense turbo cam,FMIC,150 wet, double roller timing chain, Diamond forged coated pistons 8:0:1, Diamond piston rings, cryoed L32 connecting rods, Cryoed crank, Clevite77 main bearings, Clevite77 cam bearings, Clevite77 L32 rod bearings, ARP Everything, Intense/meizere true billet Flexplate, Custom UIM, Intense oil pressure kit, Cometic 4 layer head gaskets, OE-R lifters, Cryoed L67 block, ATI turbo dampner, MUCH MORE, 6 more to choose from ASE Certified

I prefer the yellow works with anything stuff myself, just in case you don't get it all out, or a shop decides to add some

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Steve
'97 GTP VS cam, ZZP PCM, and not much else yet

The way to stay cooler is to a 30/70 water/coolant mix in the summer. Just remember to add more coolant before the first freeze.

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2008 Greater Ohio Club Grand Prix President

My Mod List

I will definitely be changing the dexcool! Just wondered what brand people were using?

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ZZP 3.1 MPS, 2.5" catless exhaust, TOG's, XP hot cam, 105# springs and mod'd retainers, ZZP pcm, alt voltage booster, Wizaired intake, heads lightly ported and 3 angle valve job, PRJ 10.4's, ummm

FWIW, you would want a 30/70 coolant/water mix. The more water you run, the better in the summer.

I knew what you mean, I think you just got your mixes all worded up.

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1997 GTP - 200k+ miles, PEMs, 3" SS Exhaust w/ Borla Mufflers, 3.4", 180* stat(summer), FWI, 1.84 RR, PT, SLP hood, KYB GR2s, GMPP Handling Kit, etc...

my car ran 10-15° cooler when i dumped dexcool for slandered green.
This was messaured by scan master and a tech II.

Now in my regal i changed dexcool when i did LIM and i dropped a from dead center tick to half way to the next lowest tick with just green coolant.

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We can’t help ourselves. We see a line, we want to cross it. Maybe it’s the thrill for trading the familiar for the unfamliliar. A personal dare. The only problem is once you’ve crossed it’s almost impossible to go back. But if you do manage to make it back across that line you find safety in numbers.

That's what I meant, it was late.

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2008 Greater Ohio Club Grand Prix President

My Mod List

I am running straight water for now. I haven't taken the time to flush the system and add straight green.

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Red 2dr 99 GTP: Z7 t66, A/A IC'd, Custom Heads, 65# Inj, ST2 Cam, Meziere Elec Pump, JP Double Roller(with machined crank gear), Plogs, PLX W/B, Powrtuner

99 Regal GS (work car)