"Marty Nowak \(Got-Speed\)" <got-speed@cox.net> wrote:
: Can someone tell me what pinging sounds like ??
: We just installed a hypertech in a buddys QC 5.9
: It was made for a 5.9 (I'm not sure if it was R/T specific tho, just said
: 5.9 Dodge)
: And under full throttle it sounds like someone is popping popcorn under the
: hood or BB's rattling in a jar. Is this detonation ? FWIW - The truck does
: have alot better midrange.
Yep, that's pinging (pre-detonation) - sounds sort've like someone
shaking a coffee can full of marbles. :-) What's causing it is the
advanced timing of the Hypertech. That's good for more power, but
you need more ignition-resistant fuel and/or a cooler combustion chamber.
Definitely run high octane (no need to go crazy, 92-94 should
do it) and seriously think about installing a 180 degree thermostat.
When I installed the Mopar PCM on my '96, I got pinging, even on 92-93
octane, but a 180 degree thermostat eliminated that.
Oh, and disconnect the hypertech until you are able to make those
changes - you don't want the truck pinging if you can help it! Its
not conducive to engine longevity. :-)
---Jon-
.---- Jon Steiger ------ jon@dakota-truck.net or jon@jonsteiger.com -----. | I'm the: AOPA, DoD, EAA, NMA, NRA, SPA, USUA. Rec & UL Pilot - SEL | | '70 Barracuda, '92 Ram 4x4, '96 Dakota, '96 Intruder 1400, '96 FireFly | `----------------------------------------- http://www.jonsteiger.com ----'
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