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Author Topic:   Water & Oil Temps
Iowamod20
Dirt Full Roller

Total posts: 73
posted May 11, 2005 06:43 AM  
What kind of temperatures do you guys get?

I freshened my 355 that I ran last year, which I had a hard time getting temperature, put in a new cam and this year I am running warm. 180 Water which is good, but my oil temp is 270. My motor builder says 270 is too hot. I have bumped up my jets each week. I don't understand how the water can be fine, but the oil is getting warm.

Thanks.

bigphillb
Dirt Roller

Total posts: 19
posted May 11, 2005 07:01 AM  
Whats your oil pressure? We found out the hard way high oil pressure can cause the oil temp to go up. Some motors don't like high volume or high pressure oil pumps. Also to tight clearances will do it too but seeing as you had the same problem last year I wouldn't think that would be the problem.

dirtbuster
Dirt Forum Champ
Total posts: 2007
posted May 11, 2005 07:49 AM  
without an oil cooler its gonna be tough to keep oil temps down. I wouldnt put mroe jet in it just to cool it off either.

With an oil cooler our water runs about 200 and oil about 230-240. without the cooler I am guessing it owuld be close to or over 300.

zeroracing
Dirt Forum Champ
Total posts: 1875
posted May 11, 2005 08:25 AM  
get an aluminum oil pan, they will cool the oil a TON. many late models go to aluminum pans then the oil temps drop so they can take the oil cooler off. A good aluminum pan is a great way to go if you have a few extra bucks.

George Gilliland
Dirt Forum Racer

Total posts: 92
posted May 11, 2005 10:33 AM  
When my engine is 190*, then my oil is 235* without an oil cooler. If the engine runs a little hotter then the oil is the same amount higher. If the oil is 270*, I would expect that there is a mechanical problem.

Iowamod20
Dirt Full Roller

Total posts: 73
posted May 11, 2005 11:22 AM  
Last year I didn't even run a fan, because I had a problem keeping the engine warm enough. I was usually in the 180 to 200 range on water, and 240 oil last year. This year with a fan, still at 180 water, but oil temp is higher. I do have 80 lbs of oil pressure when I first fire the motor. Last year was more like 70 lbs.

Barry Grant said that maybe with the new cam, the motor thinks the carb is too big which can cause a lean condition. They told me to try a 4-hole spacer under it.

Thanks for the replies.

wfoondirt
Dirt Forum Champ
Total posts: 505
posted May 11, 2005 01:02 PM  
80 psi is an awful lot for idle, whats it do when revved? Thats a waste of hp and can cause high oil temps. Usually ~300+ is an indication of pending bearing failure. Another factor to consider is the location of your sending unit. Readings can vary depending on where its located in the system. I agree with db, more fuel isn't going to help the oil temps.

We run 200-210 water and 230-250 oil with a cooler and on gas and mobil 1.

[This message has been edited by wfoondirt (edited May 11, 2005).]

[This message has been edited by wfoondirt (edited May 11, 2005).]

NJantz
Dirt Forum Champ
Total posts: 755
posted May 11, 2005 01:45 PM  
What kind of oil temps do you guys recommend as a safe operating range? I've heard around 220deg. F. or so.


GRTWallbanger
Dirt Maniac

Total posts: 196
posted May 15, 2005 04:19 PM  
we ran 240 on oil last week.Is that getting a little warm?

wfoondirt
Dirt Forum Champ
Total posts: 505
posted May 16, 2005 08:10 AM  
I usually start getting concerned when I see temps around 270-280 after a feature. I Usually shoot for temps in the 220-260 range.

Iowamod20
Dirt Full Roller

Total posts: 73
posted May 16, 2005 11:17 AM  
Update:

I replaced all of my fuel lines in the car, and raced over the weekend. My oil temp came down to 210 to 220. Water lowered a bit as well, 170, but the air temperature was in the 50's.

Thanks.

MIDWEST MOTORSPORTS
Dirt Full Roller

Total posts: 50
posted May 17, 2005 02:00 PM  
as long as the oil temp is within 100 degress of the water you should be fine. could have some ring seating issues, causing oil temps to be warm.

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