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Originally Posted by GreyHoundSteve
Whats vss?
I know all about the actual components of the tpi since i had an 86 vette. When it comes time to put the new motor in i will most likely use an aftermarket tpi set up (accel, tpis and edlebrock make some nice ones). I was just wondering if any of those tpi set ups would plug right in to any tpi harness as long as the chip was reprogrammed to meet the specs of that particular motor?
Also, ive heard talk of one ecm's being better than another, which one is best and why? Ive seen people post emc #'s and say "this is the good one" ..... what are they talking about?
p.s. ive been watching that auction on ebay, what a good price for that harness and what else would i need if i bought a "take off" L98 minus the electronics?
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Your 86 Vette had a MAF tuned port system in it. A Vehicle Speed Sensor (VSS) is for speed density systems. They will run without a VSS, but the ECM will not have as much information to go by. Basically you thread it on the end of your speedometer cable, then put your cable back in place - that's all there is to hooking up a VSS.
Typically the 1227727 ECM is the most desirable speed density ECM. It was used in Corvette's and is a heat/weather-proof design which allows you to mount it anywhere - even in your engine compartment as was original in Vette's.