Temp Gun or Onboard...Whats the Diff?

[redhatman]

Hey, I am looking to get a temp gun like http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&category=34063&item=5977595365&rd=1 or an onboard temp like this http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&category=44028&item=5977212507&rd=1 I was wondering how you would use an onboard one. Could you please tell me? Thanks
-Pat (redhatman)

 

[redhatman]

ooo, I see. it is a bead that you put by the crankcase...

 

[Diver6127]

Onboard temp sensors get the readings via a coil that is wraped around the base fin of the cooling head. A temp gun allows you to take a reading at the glowplug. I prefer to use a temp gun because the onboard sensors tend to be a little bit off. The temp gun can also be off by +/- a few degrees but it also allows you to keep weight off the car (if that's important to you) and also keeps the car less cluttered. Space is at a premium in these cars.

 

[Bouzouki]

I would assume temp guns are more accurate.

I use a raytek w/laser temp gun.

Battery seems to last forever.

 

[redhatman]

Couldn't you just hold that bead over the engine head and take the temp? Thanks
-Pat (redhatman)

 

[Diver6127]

The temp sensor must be in physical contact with the head at the base fin for an accurate reading. As Bouzouki stated, the laser temp guns are more accurate.

 

[redhatman]

does anyone know anyone who has a temp gun cheap for sale?

 

[Tarant]

I like temp guns better then onboards, if you have the body on you must have the onboard in a place were it can be seen or you have to take the body off to see it, but with a temp gun just point and shoot.

 

[JatoFever]

I've always used onboards then this weekend at the track I found out my on-board was 50 degrees off :shrug: . Bad news is I may have broken the motor in too cool. Good news is I got to lean the sucker out way more. So now my temp gauge says 310F I'm really only running 260F. I'm gonna get a handheld soon for back up.

 

[redhatman]

does anyone know anyone who has a temp gun cheap for sale?

Any ideas?

 

[Diver6127]

The duratraxx flashpoint, OFNA ... both are less than $30.

 

[redhatman]

what one would you guys recommend?

 

[Diver6127]

I use both the flashpoint and OFNA temp gun. IF I had to get a new one and price wasn't a problem, I'd get the Raytec gun but they can get expensive.

 

[sweetdiesel]

I've always used onboards then this weekend at the track I found out my on-board was 50 degrees off :shrug: . Bad news is I may have broken the motor in too cool. Good news is I got to lean the sucker out way more. So now my temp gauge says 310F I'm really only running 260F. I'm gonna get a handheld soon for back up.

I got similar results between my venom onboard and my PE temp gun. The onboard reads 20 degrees higher than the gun at temps above 200.

 

[ImBroken]

Any ideas?

Check here...
https://www.rcnitrotalk.com/forum/showthread.php?p=324603#post324603

 

[redhatman]

whats your point? Zandor already bought it. Anyone else?

 

[Nitrobuzzard]

I used a Raytek laser temp gun for about 5 years now, its nice and I love it, BUT, I've recently installed a Venom on-board temp monitor in my NTC3. The thing I like about the on-board is that is has a "recall" button for the highest temp reached during racing. I've also compared the two and found that the Venom was only off +/- 2 degrees compared to the Raytek. The Venom is also positioned so that I can look through the windshield and see it without taking off the lid. I'll keep comparing the two just to make sure the on-board doesn't start giving false readings.

 

[Revo Rancher]

I use both on most of my rigs. I find them to be fairly accurate compared to my temp gun. I set mine up like buzzard so that I can see it from the window. I like the peak feature. It is kinda neat to see the different peaks I get with each different body I run on some of my rigs. (T-Maxx and RS4-3 SS road car mostly)