Head temps, HOT, difference between 1 and 3 |
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Head temps, HOT, difference between 1 and 3 |
yarin |
Apr 15 2007, 07:46 AM
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#1
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'14-X'in FOOL Group: Members Posts: 988 Joined: 13-May 03 From: Guttenberg, NJ Member No.: 693 Region Association: North East States |
I've got two of the VDO spark plug type head temp sensors. One on cyl 1 and one on cyl 3. I know that cyl 3 is the hottest, but i'm seeing differences of ballpark 30-40 degrees between the two. From the drivers seat I can't accurately read the gauges, so i'm going to move the gauges somewhere else and see how hot the temps get.
On the track the #1 cyl gets to about 365F. The #3 gets hot, unconfortably hot for me. I thinking around 400. I tried retarding timing 5-6 degrees total, didn't seem to make a difference. A little history: the PO was doing a hill climb and literally melted the right side of the engine (cyl 3 side). He had the head rebuilt and slapped it back together. Before I converted to megasquirt the carbs had all this metal crap (aluminum maybe) welded to the inside of the butterfly valves. I'm thinking this head really had a melt down. #3 always run hotter than #1, even at idle. I'm going check reading on my stock injection head temp sensor and see what Megasquirt says. It was bugging the shit out of me at the track. I kept looking over instead of concentrating on the course. Thanks Attached image(s) |
computers4kids |
Apr 15 2007, 12:41 PM
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#2
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Love these little cars! Group: Members Posts: 2,443 Joined: 11-June 05 From: Port Townsend, WA Member No.: 4,253 Region Association: None |
The following temps are based on the readings I have seen... Jake, Thanks for taking the time to better explain the type IV motors and head temps. From reading numerous posts in the past I knew much of what you were saying, but I have to admit....I would have been one of those guys who would have pulled over with the engine running to allow for cool down if my motor got really hot...not that it has...yet. I would of thought that leaving the motor running at the side of the road would have been good...keeping air flow around the heads to bring it back down. I guess that comes from my experience with water coolled motors...when you turn off a hot water coolled motor...the temps skyrocket. Anyway...thanks, Mark |
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