Subject	What triggers safety boost? Is it the knock sensor
Posted by	AZHeat on October 31, 2007 at 2:44 PM
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In Reply To	EBC users: Any interest in a safety boost warning device? posted by zgene4 on October 31, 2007 at 02:08 PM
Message	or is it from overboost situation? Does the JWT ecu cut back timing in the safety boost state? An over boost situation can easily be detected by using an adjustable hobb switch which run about $20. You can connect it to a relay which would cut power to the boost solenoid and also use an audible piezo tweeter from radio shack. I used something similar except instead of boost I am using egt. My Greddy EGT guage have a warning output wire. I set the warning to when the temps reached a certain threshold temp that it would sound off the piezo tweeter. "Yes, I know more then JWT. Someone has to be the top dog, and it just so happens it's me." Nixit
Follow Ups	EBC users: Any interest in a safety boost warning device? - zgene4 14:08:53 10/31/07 wouldn't this be useless to anyone using a JWT ECU - ZEngineer 14:12:00 10/31/07 Re: wouldn't this be useless to anyone using a JWT ECU - zgene4 14:14:41 10/31/07 Negative. The safety boost function still works. I believe - Eric(NJ) 14:19:59 10/31/07 I think the circuit designed here takes that into account - jcieslik 14:25:38 10/31/07 Yeah, that's the circuit I was originally going to use but I - Eric(NJ) 14:40:41 10/31/07 Correct, the LED in this design will not illuminate at idle (n/m) - zgene4 14:54:53 10/31/07 As long as that is the case then I would be interested. (n/m) - Eric(NJ) 14:56:43 10/31/07 I ran in safety boost for months with my JWT ECU. - rojoloco (Yokosuka, Japan) 23:24:55 10/31/07 Sounds good. $40 is a fair price for a warning of an issue - Barry'z (NJ) 14:29:35 10/31/07 sluggishness and 7 PSI boost are pretty obvious - vorpalZ 14:33:39 10/31/07 Re: sluggishness and 7 PSI boost are pretty obvious - zgene4 14:55:47 10/31/07 What triggers safety boost? Is it the knock sensor - AZHeat 14:44:55 10/31/07 Knock sensor and coolant temp sensor can cause safety boost. - Eric(NJ) 14:48:15 10/31/07 It's really not needed - ZCulture 15:20:07 10/31/07 Very cool, I think I'll do that this weekend. (n/m) - Barry'z (NJ) 15:35:18 10/31/07 I'd probably go with this - turbomaniac 15:47:28 10/31/07 I wouldn't mind a visual confirmation of safety boost. (n/m) - Eric(NJ) 16:33:19 10/31/07 Put an LED in parallel with the relay. Done. (n/m) - MixManMash 17:28:55 10/31/07 If you do that then you still run into the same problem of - Eric(NJ) 17:38:21 10/31/07 and it would illuminte everytime you let off the throttle - zgene4 17:41:44 10/31/07 True. You could use any comparator circuit - ZCulture 17:59:03 10/31/07 in english please - zgene4 18:53:53 10/31/07 Yep, looks like that is the better option and saves me a lot - zgene4 17:42:37 10/31/07 Re: EBC users: Any interest in a safety boost warning device - Z-Tech 16:25:30 10/31/07 Re: EBC users: Any interest in a safety boost warning device? - Hipendicular 20:54:43 10/31/07
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