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My new to me 96 LT4 came with a Hypertech PTM piggybacked onto my ECM. I can’t find jack on the internet concerning what this thing does. Anyone know? Fans don’t come on any earlier. Hit almost 235 before they kicked on. I’m half tempted to take this thing out.
'96 doesn't have an ECM, t has a PCM and you mention 'piggy backed'? Post some images and mention what it says or is printed on the part. Tuning on PCMs doesn't generally result in anything 'piggy backed'.
'96 doesn't have an ECM, t has a PCM and you mention 'piggy backed'? Post some images and mention what it says or is printed on the part. Tuning on PCMs doesn't generally result in anything 'piggy backed'.
'96 doesn't have an ECM, t has a PCM and you mention 'piggy backed'? Post some images and mention what it says or is printed on the part. Tuning on PCMs doesn't generally result in anything 'piggy backed'.
looks like the connection that would normally run to the PCM goes to the Hypertech, then runs back to the PCM.
'96 doesn't have an ECM, t has a PCM and you mention 'piggy backed'? Post some images and mention what it says or is printed on the part. Tuning on PCMs doesn't generally result in anything 'piggy backed'.
I did a search and found this on a site called PerformanceCenter.com:
Edit: I just went back to re-read your first post and notice you say you have an LT4. When I went through the prompts for this thing it asked for transmission type and only offered Automatic as an option. The LT4 with manual trans has different tuning from the LT1 with automatic, it sounds like this thing is designed for the LT1. If it was me I'd get rid of it as it's likely not optimized for your engine.
Hypertech Power Tuning Module
Vehicle Selected:
1996 Chevrolet Corvette
Options:
Transmission: Automatic Transmission
Engine: 5.7L/350ci V8
Showing products for Hypertech Power Tuning Module
Showing 1-1 of 1 products
Page 1 of 1
HP & Torque 15 HP/15 ft lbs Torque Installation Installation of the PTM is a snap! Unplug the wiring harness connector from your truck's computer. Plug the PTM cable into the computer. Plug the vehicle's wiring harness into the PTM. Smog Legal 50 State Smog Legal Tech Notes Requires the use of premium fuel. Description Based on point-by-point spark curve tuning, the Power Tuning Module (PTM) produces an improvement in performance and driveability you can really feel! Unlike some in-line power control modules that trick the computer with false coolant temperature or throttle position signals, the PTM utilizes Hypertech's proven Power Tuning techniques - dyno-developed, optimized spark curves that maximize an engines horsepower. You get more bang for your buck with a Hypertech Power Tuning Module. The Hypertech PTM is very affordable - and its ability to provide solid performance gains at an economical price make it the top choice among power modules. Manufacturer Information Item: 1996 Corvette 5.7 Lt1 Ptm Item Number: 366122 Approximate Item Package Dimensions: 8" x 8" x 2" Approximate Item Package Weight: 2 lbs
I did a search and found this on a site called PerformanceCenter.com:
Edit: I just went back to re-read your first post and notice you say you have an LT4. When I went through the prompts for this thing it asked for transmission type and only offered Automatic as an option. The LT4 with manual trans has different tuning from the LT1 with automatic, it sounds like this thing is designed for the LT1. If it was me I'd get rid of it as it's likely not optimized for your engine.
Hypertech Power Tuning Module
Vehicle Selected:
1996 Chevrolet Corvette
Options:
Transmission: Automatic Transmission
Engine: 5.7L/350ci V8
Showing products for Hypertech Power Tuning Module
Showing 1-1 of 1 products
Page 1 of 1
HP & Torque 15 HP/15 ft lbs Torque Installation Installation of the PTM is a snap! Unplug the wiring harness connector from your truck's computer. Plug the PTM cable into the computer. Plug the vehicle's wiring harness into the PTM. Smog Legal 50 State Smog Legal Tech Notes Requires the use of premium fuel. Description Based on point-by-point spark curve tuning, the Power Tuning Module (PTM) produces an improvement in performance and driveability you can really feel! Unlike some in-line power control modules that trick the computer with false coolant temperature or throttle position signals, the PTM utilizes Hypertech's proven Power Tuning techniques - dyno-developed, optimized spark curves that maximize an engines horsepower. You get more bang for your buck with a Hypertech Power Tuning Module. The Hypertech PTM is very affordable - and its ability to provide solid performance gains at an economical price make it the top choice among power modules. Manufacturer Information Item: 1996 Corvette 5.7 Lt1 Ptm Item Number: 366122 Approximate Item Package Dimensions: 8" x 8" x 2" Approximate Item Package Weight: 2 lbs
Damn fine investigative work! Really appreciate it. It’s coming off the car today.