Egt

[Old Boy]

Good Day Can some one please tell me what the exhaust gas temp is on a new 800 t3? Thanks.

 

[Old Boy]

Good Day Can some one please tell me what the exhaust gas temp is on a new 800 t3? Thanks.

Must be a big top secret?? Or a dealer secret?

 

[prairie-rider800]

I'm no expert but I'm pretty sure it depends on rpm, throttle position, engine load etc and where the sensor is placed. Why are you asking?

 

[Old Boy]

Just wondering in the days when we raced and hit the hills we ran at 1100 deg. That was with carbs . Today's motor's must be better with all the computer stuff???

 

[Modman]

Just wondering in the days when we raced and hit the hills we ran at 1100 deg. That was with carbs . Today's motor's must be better with all the computer stuff???

The question you are asking is super vague, so that's probably why no one has responded, not because its a "big secret". What EGT reading are you looking for, full throttle? OK, lets assume that - how far are your probes from the pistons? do you have twin pipes or a single? If its a single, is it 2 probes in the y or just 1 in the main pipe? What fuel are you running? What plugs are you running? Do you have a fuel controller on it? Have you done a plug chop to correlate the EGT reading that you are seeing, the colour of the plugs?

I've owned sleds that wouldn't even run at 1100 degrees, that low of a temp would be wayyyy to rich. My race gas motor liked 1350 to keep spinning quick but that's a function of the fuel and compression in that specific engine. You need to tape over the gauge screen and dial in the fuel mixture using the plugs and pistons, then take the tape off the gauge and see what it says. Most sleds run around the 1220-1250 mark at full throttle about 6-8" from the pistons with the probes but you won't know what is the optimal temp by looking at the gauge, only by looking at the plugs. My preference is to tune with an A/F gauge, EGTs are easy to get a false positive on and usually too little too late.

Yes, the new sleds are much more finicky with the fueling and a ton more tunable than just a few circuits in thecarbs.

 

[lilduke]

Who even runs an EGT on there T3 except maybe a few Turbo guys? Things have changed man...lol

 

[Old Boy]

Sorry. Mr. Lilduke. That was 40 plus years ago. That generation came up with a lot of the things that make your sled go over snow today. I wonder what you will not get in 40 plus years from now.

 

[lilduke]

Sorry. Mr. Lilduke. That was 40 plus years ago. That generation came up with a lot of the things that make your sled go over snow today. I wonder what you will not get in 40 plus years from now.

Dont be sorry,, just how it is. who knows what the next 40 year will bring? maybe Carbs will make a comeback?? Lol

 

[Old Boy]

Thanks Modman. We did not use any special fuels cost to much. Most people did all their own motor work. Prob was about 1 1/2 inches from head. If we hit 1250 we had a hole in piston. I use now a a/f on my boat. My HP. days are over as pension is to small.That 1350 motor must have put out some big HP. Hell back then was no way to get machine to even go backwards unless you pulled it. Thanks

 

[Modman]

Thanks Modman. We did not use any special fuels cost to much. Most people did all their own motor work. Prob was about 1 1/2 inches from head. If we hit 1250 we had a hole in piston. I use now a a/f on my boat. My HP. days are over as pension is to small.That 1350 motor must have put out some big HP. Hell back then was no way to get machine to even go backwards unless you pulled it. Thanks

That's good for the old stuff, but what about your new sled? My recommendation is to run an wideband A/F gauge, see what the values are, you might be surprised that they are running pretty hot. If you think you can clean it up (the etecs are pretty spot on from the factory from what we've seen) you can get an Boost it or BD box for it if you want to tune it after that but I would try the gauge first and see what values you get. Also the new sleds wake up quite a bit once you get past the break in period, so maybe wait until you've got some miles on it first.

 

[Thunder101]

A/F is the only way ! I read plugs and wash and later bought egt's, that have been on many sleds, then was told to get a A/F gauge by a pipe builder and was very surprised with how little the E temp changed when dialling in the A/F not to mention the egt temps just scare a guy sometimes lol. As Modman said most just want to put tape over the egt gauge so you don't look at it.
one thing for sure Doo never left anything on the table.

 

[slededjr]

Are you asking g what heat range the factory egt in the pipe reads? That's how I understand the question. I've never actually watched mine to see what range it's in. I wouldn't think it would be near the same as a digitron or koso as their probes are mounted much closer than the factory one is.

 

[Old Boy]

sledjr Yes that's what I was after.

 

[slededjr]

I thought so old boy. I messaged the guys at the skidoo race Dept today. Should have answer tomorrow.