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Cooling System Upgrades for 98 GTS

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Cooling System Upgrades for 98 GTS
Old July 25th, 2020, 12:27 PM   #1
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Cooling System Upgrades for 98 GTS

Lately it's been pretty hot up here in WI and I've noticed my car seems to be running extremely hot....I know the "dummy" coolant temp gauge on the dash isn't totally accurate so maybe I should get an accurate gauge installed before I jump to conclusions....But I plan on keeping this car for a long time and would like to make sure I make it as reliable as possible.

Current mods:
Paxton Kit
Mishimoto Lower Hose
Belanger headers/Corsa exhaust

Rest of the cooling system is stock....In my previous cars/experience I have always put 160 degree thermostats in and then adjusted the tune to have the fans come on earlier. In my head I feel like a nice aluminum radiator with upgraded fan and cooler thermostat should be all I need to do.

I've seen people say the Ron Davis radiators have alot of issues....From some of the research it seems like the Howe radiators are the best available....Anyone have a line on those since they seem to be discontinued?

Just looking for feedback and experience from people who have upgraded their systems and results. Thanks!
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Old July 25th, 2020, 04:23 PM   #2
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Contact Dan the man! He will address all your cooling concerns (dual fan upgrade, radiators etc.).

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Old July 25th, 2020, 05:58 PM   #3
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You have to purchase the Howe through RSI. I tried going through Howe shortly after they stopped selling from their website, but was told I had to go through RSI. I was very leery given all of the issue reported on here with RSI, but my transaction was fairly smooth after they initially invoiced me for the wrong model year and corrected it.


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Old July 26th, 2020, 07:17 AM   #4
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Quote:
Originally Posted by Endlessgts View Post
Just looking for feedback and experience from people who have upgraded their systems and results. Thanks!
I've had excellent luck with my Stock cooling system, works great on my '98. The OEM radiator is actually very robust so long as you're maintaining it.

Only "upgrade" is a set of those silicon hoses and I'm running Arts recommended relays.

I've really only just maintained the harness connection, maintained the relay connections, maintained proper front fascia bottle levels, cleaned out radiator fins, etc.

Maybe the ceramic coated headers help remove the heat a little, who knows.

Good luck bud.
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Old July 26th, 2020, 09:44 AM   #5
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Quote:
Originally Posted by Endlessgts View Post
I know the "dummy" coolant temp gauge on the dash isn't totally accurate
Is it broken? Is a sensor bad?
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Old July 26th, 2020, 01:14 PM   #6
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Quote:
Originally Posted by Chuck 98 RT10 View Post
Is it broken? Is a sensor bad?
It isnt exactly accurate....when it's above the 3rd mark I have no idea what actual coolant temp is....I'd love to have a way to digitally see it.
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Old July 26th, 2020, 01:52 PM   #7
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A cooler thermostat won't do shit. It has no effect at all on how hot the car gets. I had a 180* thermostat, new 4 core rad., new water pump and fans adjusted to lower temp. No problems at all unless stuck in traffic, A/C on in Tx. heat. Turn off A/C, and temp would drop to normal.
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Old July 26th, 2020, 03:17 PM   #8
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Where in Wisconsin, I am in Appleton/Green Bay area. I have the Howe from RSI with fan upgrade (single large high speed fan), lower thermostat and hard coolant pipe kit on my 96 twin turbo and it cools decently. I never overheat but on these hot days it gets up to the 235 mark but never beyond. I have thought about getting the dual cooling fans but haven't yet as most days my car is perfect except for these really hot days but it still cools so I don't overheat. I have a huge intercooler blocking my entire radiator as well so that doesn't help and I have gen 1 hood so no heat can escape. I think for your setup the new radiator will probably be enough to keep it cool but if you wanted more, pair that with the dual fans and you shouldn't have a problem again.

If you never had an issue in the past then maybe your water pump is taking a crap, or air bubble in cooling system, or maybe need a coolant flush. Thermostat could be going bad as well.
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Old July 26th, 2020, 07:48 PM   #9
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This should help.

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Old August 11th, 2020, 11:55 AM   #10
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