Lumberjack_Matt
Gone - bye bye.
Anyone know where I can find temperatures for fine tuning my engine to race spec? Its the .15 pro from the Sport SE.
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Traxxas Engine Temperatures
- Thread starter Lumberjack_Matt
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jetmechG550
RCTalk VIP
There's no set in stone temp. Shoot for 240-260 but Traxxas tend to run a litlle hotter. You'll be fine probably to 275 if you're still leaving a good smoke trail.
Lumberjack_Matt
Gone - bye bye.
- Thread starter
- #3
Thanks for the tip.
Lumberjack_Matt
Gone - bye bye.
- Thread starter
- #4
I thought of another question about temp tuning...
How much does weather effect your reading, and how should you compensate for various weaher temps.
How much does weather effect your reading, and how should you compensate for various weaher temps.
Bryson
Hardcore RCTalk User
I find that if its cooler outside my car will run better and i get longer runtimes. But I'm in Cali so cold here is like 60 lol. Last year i ran in 40 degree weather and i stayed at a constint 180 and could run tank after tank with a good power band:yes: .
Bryson
Bryson
jetmechG550
RCTalk VIP
Weather can play games with tuning if it's drastic changes. Heat, cold, humidity, elevation, and barometric pressure all effect the engine in one way or another.
As jet suggested, there are a lot of factors in engine tuning. Just one of many is ambient temperature. A bit of a rule of thumb is that as it gets colder out, you'll have to richen the engine a bit. This is to compensate for the more dense air which essentially leans the mix. And as it gets warmer out, do the opposite for the opposite reason.
As you learn, you'll find that you will have to fine tune your engine most every session due to changes in environment. Just one of the crosses to bear in running nitro.
As you learn, you'll find that you will have to fine tune your engine most every session due to changes in environment. Just one of the crosses to bear in running nitro.
Lumberjack_Matt
Gone - bye bye.
- Thread starter
- #9
what would be an oppurtune temp to tune at...
Temps is by all means no base line to tunning your engine, i've seen engines running hotter then other average engines and still performed heat after heat, try to tune by sound, performance and smoke trail, use your temp gun when you believe you hit the sweet spot, use the temp gun just to make sure things are in check.
Just a word of advise on cheap temp gun knock offs, make sure you get calibrated certfied ones, local guys with cheap knock offs were reading 20 degrees difference in Farenhiet between a professional temp gun and a cheap one.
Your setup is just as good as as how much you invest in your tools.
As safety not, try to keep your engine always slightly rich then lean either on the LSN or HSN and if you have a midrange needle set that back to default factory setting and you should be safe.
Just a word of advise on cheap temp gun knock offs, make sure you get calibrated certfied ones, local guys with cheap knock offs were reading 20 degrees difference in Farenhiet between a professional temp gun and a cheap one.
Your setup is just as good as as how much you invest in your tools.
As safety not, try to keep your engine always slightly rich then lean either on the LSN or HSN and if you have a midrange needle set that back to default factory setting and you should be safe.
mach1basher
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temp made me screw up my engine. In the winter I was runing at what the temp gun said 80F. Leaned it out and boom bye bye engine.
667
RCTalk Basher
Traxxas lists the running temp for a properly tuned pro .15 as 300 - 320.
http://www.traxxas.com/support/index.php?action=artikel&cat=35&id=121
Much hotter than I would ever want to run.
http://www.traxxas.com/support/index.php?action=artikel&cat=35&id=121
Much hotter than I would ever want to run.
667
RCTalk Basher
my pro .15 is running at about 260-275 and it is absolutely screaming. I'm afraid to take it any leaner. Once I get the conversion kit to put my 2.5 in I may tune it up into the 300 range to see what it does. Until then I want to keep my motor alive.
There's more to tuning than just the temp. You have to listen to the engine and see/feel the performance also.
I know I'm in the minority on this issue, but I'm not having any issues with my Pro .15 in my Nitro Sport. My S-25 runs consistently in the mid 290's and has for over 4 gal of running, still very strong with Great compression!
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667
RCTalk Basher
With my pro .15 running in the mid 200s I am still having strong compression. I was running it through some pretty heavy dust and dirt the other day so I tore the engine open when I got home to give it a good cleaning. Piston and sleeve are still pristine. They still have a nice, mirror finish to them. It was good to see that I didn't have any signs of running lean.
