Heat related power cuts
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Joined: Oct 2002
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From: Richardson
I have been working with the Ultralight guys
http://www.wcmultralite.com/
Yesterday at Motor Sports Ranch several, including one with an AEM, started having some issues when the temp gauge got to 205 or hotter. The guy with the AEM was using a slightly modified AEM program so he has theorized that AEM might have copied Honda's heat related safeguards.
Most run the stock ecu and I know the timing is cut once a certain temp is reached, but VTEC also seemed to be affected once temps reached 210.
Does anyone know at what temps things start to happen. Can someone tell me what is supposed to happen and when?
It is conceivable that at least a part of the symptoms were coincidental and could have been fuel surge, I just need to know which ones.
Although I have told them and told them they still don't run Hondata gaskets plus that time will show the cooling system to be marginal for Texas weather. There is room for much more radiator than they are currently running so I know it is a fixable issue. Mine will have a bigger radiator!!!! We were running 40 minute sessions so they were getting taxed pretty hard.
One was a Minnesota car so he'd never had any issues at all but then again he thought our 80 degree weather was insufferable.
It was a hoot watching them run absolute rings around most everything else!!! Take close to 2000 lbs off the weight of a S and you know it's got to be fast. But the things they could do in the corners was just mind boggling!
I was in the slow car. It had street tires and A/C and yet we reeled in a Turbo Porsche, Z06, some old bodied vettes, some kind of caged Camaro, a turbo Lotus Elite and just about every other car you can name. It was interesting getting to brake after the last braking cone. Or would scary be a better term?
http://www.wcmultralite.com/
Yesterday at Motor Sports Ranch several, including one with an AEM, started having some issues when the temp gauge got to 205 or hotter. The guy with the AEM was using a slightly modified AEM program so he has theorized that AEM might have copied Honda's heat related safeguards.
Most run the stock ecu and I know the timing is cut once a certain temp is reached, but VTEC also seemed to be affected once temps reached 210.
Does anyone know at what temps things start to happen. Can someone tell me what is supposed to happen and when?
It is conceivable that at least a part of the symptoms were coincidental and could have been fuel surge, I just need to know which ones.
Although I have told them and told them they still don't run Hondata gaskets plus that time will show the cooling system to be marginal for Texas weather. There is room for much more radiator than they are currently running so I know it is a fixable issue. Mine will have a bigger radiator!!!! We were running 40 minute sessions so they were getting taxed pretty hard.
One was a Minnesota car so he'd never had any issues at all but then again he thought our 80 degree weather was insufferable.
It was a hoot watching them run absolute rings around most everything else!!! Take close to 2000 lbs off the weight of a S and you know it's got to be fast. But the things they could do in the corners was just mind boggling!
I was in the slow car. It had street tires and A/C and yet we reeled in a Turbo Porsche, Z06, some old bodied vettes, some kind of caged Camaro, a turbo Lotus Elite and just about every other car you can name. It was interesting getting to brake after the last braking cone. Or would scary be a better term?
Joined: Oct 2002
Posts: 34,131
Likes: 126
From: Canton, MA
I think its more like 1500 pounds but yeah, I get the picture. Sorry, I don't know the temps at which things get funky. 80 degrees is not very hot ambient temp. The guy in Minnesota will see that and more.
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Joined: Oct 2002
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From: Richardson
The Ultralite weighs 1408 pounds fully loaded with gas and 200 lb driver so it probably is only 1800 or so pounds.
You're right 80 ambient isn't really all that hot, but put 40 minutes of track time in at 80 degrees and you have a lot of heat to shed.
The guy in Minnesota hasn't run in 80+ degree weather up there yet except for SCCA autocrossing so he hardly gets the car warm in that amount of time.
I am hoping someone has the data on the power cuts. I know that it is hard to come by when all you can tell with the stock gauge is 2-3-4 bars.
You're right 80 ambient isn't really all that hot, but put 40 minutes of track time in at 80 degrees and you have a lot of heat to shed.
The guy in Minnesota hasn't run in 80+ degree weather up there yet except for SCCA autocrossing so he hardly gets the car warm in that amount of time.
I am hoping someone has the data on the power cuts. I know that it is hard to come by when all you can tell with the stock gauge is 2-3-4 bars.
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