Fireball

iTrader: (21)

based on what? the ones posted above at ambient have a 18deg spread (-11 to +7)

I have the altronics redalert standalone EGT logger.

question is what do they read in 1000F...I'm trying to think of a reasonable way to test that temperature...if they are linear, then the difference should remain the same...I don't think most (if any) EGT systems are 100% accurate since they don't incorporate a reference junction (ice water reference, etc)

I'm not terribly thrilled with the design of my probes though...they use a heavily shielded junction which really slows the response time....although in an actual high-flow environment, some of this slow response is mitigated). My system is supposed to do 100 Hz (10ms) sampling which is faster than most response times of TCs. ...I'm going to bring some fine wire K-type TCs home from work (~1ms response time) and put them into the sytem and see if its TC related or logger related. I may custom order some K-type probes from omega...

98Camarod

iTrader: (43)

^^^

Exactly. It was 18* at low temps and then when he did a pull there was a huge difference.

Fireball

iTrader: (21)

I just looked at omega's probes...looks like what I have is pretty standard design...

stevieturbo

I asked the same question here some months ago



http://efi101.com/forum/viewtopic.ph...&highlight=egt

Thinking now....I guess lead solder might be a suitable test medium, as it's melting point should be fairly stable and easy to achieve to test.

Fireball

iTrader: (21)

but that would deposit on the tip right?

stevieturbo

It would only deposit on the tip if you actually let it solidify on the top. It wouldnt stick if it remained liquid

And given the material of the probe itself, it may not stick even when it cools

Texas_WS6

iTrader: (9)

If it is a stainless steel probe it will not stick. You can also use a test instument like an Isotech Isocal 6. They can run up to $4000, and there is less expensive test intruments you can buy. You can also ulitise a RTD which will give you a higher level of acuracy but at a higher cost.

98Z28CobraKiller

iTrader: (17)

They are inconel valves but, like I said before, they are lying as there is NO WAY that it's getting that hot.

10sec_rx7

just get a simple amp from someone like Haltech or Bigstuff, wire it a logger or ecu and see what it is doing..

Fireball

iTrader: (21)

that would only do one...we are talking individual egts for each cylinder here...

10sec_rx7

he thinks his are wrong. put a good known single probe in one cylinder and check it against the others.. quick, simple and cheap..