 VDO Head Temp Sensor, Need help want to use 6 on a 6 |
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| seanery |
 Feb 21 2003, 02:17 PM
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#1
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waiting to rebuild whitey!  Group: Retired Admin Posts: 15,857 Joined: 7-January 03 From: Indy Member No.: 100 Region Association: None  |
Ok, here's my dilema and question.
I have one of these VDO Head Temp Sensors and 6 leads. I want to be able to monitor each head's temp. I'm running webers and thought this would be a handy thing to help figure out if/which one were running too lean. They work off impedance or resistance, don't have the part here or I'd go into detail. What kind of switch, etc. would work without giving unreliable results? ( I don't want 6 guages) Any thoughts, comments, experience? |
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| Dave_Darling |
Feb 27 2003, 05:04 PM
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914 Idiot Group: Members Posts: 15,192 Joined: 9-January 03 From: Silicon Valley / Kailua-Kona Member No.: 121 Region Association: Northern California 
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Aaaaahndy sez: dave, there is no wire, no matter how long (or short) that has 0 resistance
Sorry, I meant "as close to 0 extra resistance as is practical". JP sez: EGT will get you closer, if there was a baseline. O2 sensors would be better. EGT will only get you to some known spot. To find what the "correct" EGT is for you, you need to go to a dyno first. Tune the car for max power, and see what the EGTs are there. Then, when you go elsewhere (so air temps/pressures/humidity/etc. change) or make some very small mod to the motor, you can re-tune the engine to hit those "target" EGTs--and you'll be at max power. At least, this is according to a couple of racers that I have talked to that use EGT to tune. A narrow-band O2 sensor will tell you "richer than 14.7:1", or "leaner than 14.7:1". It will not tell you how much richer or how much leaner... At least, not reliably or repeatably. A wide-band O2 sensor will, but those are not cheap and non-trivial to install properly. Alfred sez: Your avatar scares me almost as much as Zois' old one did. Why, thank you! (IMG:style_emoticons/default/smile.gif) I'm glad that you like it. Some friends of mine bought it to hang on their wall, and I discovered that it actually fit me pretty well also... Grrr! Argh! --DD |
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Posts in this topic
seanery VDO Head Temp Sensor Feb 21 2003, 02:17 PM
Mueller EGT would be a much better parameter to monitor.
... Feb 21 2003, 02:33 PM gklinger Take a look at the 6 position switch: http://www.f... Feb 21 2003, 02:35 PM seanery I didn't wanna drill holes in my pretty jh coa... Feb 21 2003, 03:17 PM seanery This is their response:
Dear Sir: In reply to yo... Feb 27 2003, 12:59 PM Dave_Darling BTW, the thermocouple senders (that's what tho... Feb 27 2003, 01:41 PM Alfred Dave,
Your avatar scares me almost as much as Zoi... Feb 27 2003, 01:47 PM SirAndy <... Feb 27 2003, 02:38 PM SirAndy oh, also, remember that electrical resistance chan... Feb 27 2003, 02:46 PM J P Stein Me thinks Meuller is right. Head temps are not goi... Feb 27 2003, 02:47 PM seanery OK JP & Mike,
Is your theory because the heads wi... Feb 27 2003, 03:40 PM Brad Roberts You will not tune a engine using head temps. Plug ... Feb 27 2003, 04:16 PM J P Stein What Brad said....I got's to get to wurk....sh... Feb 27 2003, 04:20 PM Brad Roberts How long did you wear it, and did you ask them to ... Feb 27 2003, 06:26 PM
Dave_Darling Only a few minutes--they were just going to get th... Feb 27 2003, 08:33 PM |
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