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Author Topic:   what engine temp makes most power with gas?
posted June 10, 2004 11:42 AM
We can't get the car to warm up. Last week after the feature it only got to 165. What temp makes the most power? And reading on the Stewart web site, they say their t-stats don't reduce flow any, any reasons we shouldn't try one of these to get us up to temp?

posted June 10, 2004 12:01 PM
200-210 is about the best. Makes good power but gives you a little margin in case she starts to heat up a little.

I would stick a 180 t-stat in. Try and see what happens if it causes problems its easy to take back out.

posted June 10, 2004 12:12 PM
A lot of poeple on this board seem to be scared of T-stats. I've always run one and never had cooling trouble. It really helps the motor warm up quicker and run at a constant temp.

I'm no engine expert, but it seems to me that if a good working T-stat causes your car to overheat, than you have some other problem. In a case like that, removing the T-stat might keep it cool, but its kind of a band-aid.

If you're runnin 165, a 180 stat should be perfect.

[This message has been edited by WesternAuto17 (edited June 10, 2004).]

posted June 10, 2004 02:39 PM
I'll agree with the 200-210 recommendation. That's another thing people are deathly afraid of... if the needle gets over 180 they panic and think it's going to hurt something. The hotter the iron in the motor, the better the effciency.

Believe it or not, some new cars run at well over 250 degrees. Doesn't make best power, but makes best emissions and fuel economy. My stock Thunderbird SC ran a 197 t-stat and didn't kick the low speed fan on until 220 and high speed fan until 228. And that's not guessing.. that's what is programmed into the computer itself. If you can run 12 PSI of boost on pump gas at 230 degrees, I think 210 on the track shouldn't be a big deal with race fuel.

posted June 10, 2004 04:39 PM
i don't like t stats for the same reason i don't like weights on my hei just one more thing that isn't needed and can break and take you out i agree with the temps 200 is where i like to run mine we have alot of red flags latley and that tends to build a little more heat then just racing will if you want to build a little heat try to block some fresh air to the rad

posted June 10, 2004 05:30 PM
Jet the thing. If your running that cool more than likely your way too rich. 210 to 240 won't hurt a thing. The only problem with running hot is detonation. The new cars running 235+ have oxygen sensors guaranteeing perfect a/f ratios. We don't have that on normally aspirated stuff and things hurt alot more at 6 and 7 thousand rpms for detonation. Just my two. thermostat alky and restrict gas engines. What is your oil temp?

posted June 11, 2004 03:24 PM
I run a 180 stat, and the car runs 200 while racing and cools right down to 180 on cautions.

I have more power at 180, than at 200. You can significantly feel the power difference.

I also used a 160 stat and it went down to 160 on cautions but I was thinking thats a little cool for wide open throttle abuse.

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