Overheating.
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Overheating. At the autocross school this last weekend, my car overheated after 10 back-to-back runs. I noticed the gauge read 255 right as I was about to start my last run, and it overheated just as I pulled off.
So, a few questions:
1- my LS1 is from a 02 camaro. I remember when the C5 first came out, they advertised that this engine could run without coolant. I think it goes to a reduced power mode to prevent damage. Is that true for the 02 camaro? After she cooled off, I topped it off, and it ran fine the rest of the day.
2- i may have to work on a better fan setup. I don't have any problems in stop and go traffic, but this car will be used for autox schools often. What's the preferred electric fan vendor out there?
Thanks
So, a few questions:
1- my LS1 is from a 02 camaro. I remember when the C5 first came out, they advertised that this engine could run without coolant. I think it goes to a reduced power mode to prevent damage. Is that true for the 02 camaro? After she cooled off, I topped it off, and it ran fine the rest of the day.
2- i may have to work on a better fan setup. I don't have any problems in stop and go traffic, but this car will be used for autox schools often. What's the preferred electric fan vendor out there?
Thanks
Set the fans to come on earlier, but consider increasing
the underlying heat exchange capacity. AutoX is not
going to have the road speed to get decent airflow and
the fans may be a bit short for high output low speed
on their own. More cores = more cooling.
the underlying heat exchange capacity. AutoX is not
going to have the road speed to get decent airflow and
the fans may be a bit short for high output low speed
on their own. More cores = more cooling.
Might want to look into a lt1 radiator. It has double the capacity of a stock ls1 radiator. I know they work with only blocking off the heater hose connection on an f body, but don't know on the vette.
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unfortunately, this is in a Lotus 7 replica. Pretty small frontal area. The current radiator is an aluminum one - looks like a 3 core. Not sure what brand.
I figure the only things I can do is either go to more cores, get a better fan, or work on the air flow behind the fan.
I figure the only things I can do is either go to more cores, get a better fan, or work on the air flow behind the fan.
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From: Simi VAlley,CA
If the engine is tightly shrouded by the hood you might want to louver or somehow vent the engine compartment. No matter how good a fan is or how cold a thermostat you run, pulling enough air through the radiator is only possible if the hot air can EXIT the engine compartment. I have a friend with a 30's coupe with a "smoothie hood" with no vents or louvers, the thing always ran HOT......until he found that removing the hood immediately solved the problem. After having 500 louvers punched in the top and sides of the hood he can now cruise in 100 degree plus temps with no problem.
Originally Posted by 99c5vert
unfortunately, this is in a Lotus 7 replica. Pretty small frontal area. The current radiator is an aluminum one - looks like a 3 core. Not sure what brand.
I figure the only things I can do is either go to more cores, get a better fan, or work on the air flow behind the fan.
I figure the only things I can do is either go to more cores, get a better fan, or work on the air flow behind the fan.
I'd put an oil cooler in the back as a last resort. You'd get additional cooling from the long oil lines and it would add a little weight in the rear, not a bad thing either. Installed into the tiny trunk rear wall, with a small fan??
What did Chapman do for the race L7's??
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Here's a vid... http://media.putfile.com/EVO-Phase-1-Sunday-July-2nd
This was from last weekend. I'm dealing with axle hop issues, which is why You'll see I'm accelerating kind of late out of the corners.
To give you an idea, the best miata there was running 33.8 second laps. I was running 30.5 second laps... of that 3 second difference, I already had a 1.7 second lead 9 seconds into the run (because in the slalom portion axle hop was not an issue). The car handles great... just gotta replace the rear bushings, and improve the cooling situation so I can get even more runs in.
I do have a dry sump system in the garage which I'll put on at some point. that should help with the cooling too.
This was from last weekend. I'm dealing with axle hop issues, which is why You'll see I'm accelerating kind of late out of the corners.
To give you an idea, the best miata there was running 33.8 second laps. I was running 30.5 second laps... of that 3 second difference, I already had a 1.7 second lead 9 seconds into the run (because in the slalom portion axle hop was not an issue). The car handles great... just gotta replace the rear bushings, and improve the cooling situation so I can get even more runs in.
I do have a dry sump system in the garage which I'll put on at some point. that should help with the cooling too.
Nice video! I used to autocross a couple of Mini's about thirty years ago. LOTS of fun. The only results I've saved all these years were at an airfield in Virginia, I was 29th overall with an 850cc mini and a 427 Cobra was 30th. In most of the parking log auto-x's, I was in the top five after I went to the "big" mini - 1275cc engine.
Did you do the LS1 conversion yourself?
Did you do the LS1 conversion yourself?
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ttt...
The one question that wasn't answered is: does the camaro LS1 have a feature where it goes into reduced power mode and shuts off half the cylinders when the engine overheats or runs out of coolant in order to prevent damage to the engine?
I remember hearing something like that when the LS1 came out.
When my engine overheated in the middle of my autox run, she still had full power.
The one question that wasn't answered is: does the camaro LS1 have a feature where it goes into reduced power mode and shuts off half the cylinders when the engine overheats or runs out of coolant in order to prevent damage to the engine?
I remember hearing something like that when the LS1 came out.
When my engine overheated in the middle of my autox run, she still had full power.
