Cylinder head temperature

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A.Holley
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Cylinder head temperature

Post by A.Holley »

Hi guys,
Have just fitted a cylinder head temp gauge ( Trail Tech) to my T500.
It's the type with a sensor under the spark plug in place of the washer.
Has anyone else fitted one, and what sort of temps should I be looking for under normal operation?
Any info greatly appreciated

Andrew
Craig380
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Re: Cylinder head temperature

Post by Craig380 »

Interesting article here from Cycle mag in the 70s, about testing oil premix ratios. It mentions plug washer temps, although it is in a Suzi PE enduro bike. Generally, the article mentions temps above 380 - 390 farenheit are getting into the danger zone.

http://www.bridgestonemotorcycle.com/do ... remix6.pdf" onclick="window.open(this.href);return false;
1976 GT380 - wounded by me, and sold on
2006 SV650S - killed by a patch of diesel and a kerb in Feb 2019
2017 SV650 AL7 - naked and unashamed
A.Holley
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Re: Cylinder head temperature

Post by A.Holley »

Thanks for that, gives me a base line to work from.
As the saying goes, knowledge is power.

Andrew
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Re: Cylinder head temperature

Post by Vintageman »

I played with these on rotax fan cooled and free air engines for sleds... useless buggers to paraphrase -> http://www.ultralightnews.com/enginemai ... gauge.html" onclick="window.open(this.href);return false;. Some of these engines were also used in ultralights and they care a bit what's going on... Best is to measure exhaust temp.
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Zunspec4
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Re: Cylinder head temperature

Post by Zunspec4 »

Hello Andrew,

I have a pair of TTO gauges which use the under the plug sensors. During dyno testing on my race engine the max temperature was 130 C . If you are running in the 90 - 110 C range I would say you are OK. It would be interesting to see what you actually record.

Cheers Geoff
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ChrisK
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Re: Cylinder head temperature

Post by ChrisK »

I've just had a bit of a blow up at the Island Classic as you can see!

Image

This side was running at about 135 (the other around 100) which we think was caused by an air leak. We are using CHT and (shortly) EGT from The Sensor Connection using these gauges. http://thesensorconnection.com/egt-elec ... ge-display
I have to give them a shameless plug as they are a sponsor of our team :up: but their products are first class and if anyone is wanting to fit their bike with some sensor technology, I can highly recommend them - just act on the information they give you! :wink:
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Suzukidave
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Re: Cylinder head temperature

Post by Suzukidave »

Leak down tests are a great idea :up:
the older i get the faster i was
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ChrisK
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Re: Cylinder head temperature

Post by ChrisK »

Yep! Currently making some bits to be able to do just that.
A.Holley
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Re: Cylinder head temperature

Post by A.Holley »

Geez Chris, that had to hurt.
I have been very lucky, ( touch wood) and never holed a piston since I started with the T500 in 1975.
And that includes 15 years of racing in Post Classic class, including places like Mt Panorama .
I will admit I tend to be very cautious with jetting.
Maybe that's why I didn't win a lot of races!!!

Andrew
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ChrisK
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Re: Cylinder head temperature

Post by ChrisK »

A.Holley wrote: I will admit I tend to be very cautious with jetting.
Maybe that's why I didn't win a lot of races!!!

Andrew
:lol: maybe I'll start using that as one of my excuses!
A.Holley
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Re: Cylinder head temperature

Post by A.Holley »

The problem with jetting is, there is a very fine line between grenade and glory.
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