Physical Range of 90mm LS2 vs 78mm TB
#1
Physical Range of 90mm LS2 vs 78mm TB
Has anybody looked at their 78mm to see if it opens any more than the LS2 TB?
Played around with both today and this is what I saw. I also logged PIDs for the APP sensors and TP sensors. The logged values did not reflect the described operation of the sensors as per the service manual. So I believe that all of the interpretation of sensor inputs is done in the TAC module.
http://media.putfile.com/78mm-vs-90mm-Throttle-Body
Played around with both today and this is what I saw. I also logged PIDs for the APP sensors and TP sensors. The logged values did not reflect the described operation of the sensors as per the service manual. So I believe that all of the interpretation of sensor inputs is done in the TAC module.
http://media.putfile.com/78mm-vs-90mm-Throttle-Body
#2
? ? ? ? ? ?
iTrader: (16)
Nice! I like the comparisons all in one video. Thats funny how the stock 78 ready 100% but doesn't really open full horizontal.
I agree with you on the TAC. If its truly programmed to look for a certain voltage range that is not the same as the LS2 TB, then thats probably where the answer lies. What I'd like to see now is someone with an electric throttle body from a 02 vehicle do some logging and list their sensor voltages at various levels. Has anyone with an 02 vehicle with electric TB done the 90mm swap? Do they see the same results?
I agree with you on the TAC. If its truly programmed to look for a certain voltage range that is not the same as the LS2 TB, then thats probably where the answer lies. What I'd like to see now is someone with an electric throttle body from a 02 vehicle do some logging and list their sensor voltages at various levels. Has anyone with an 02 vehicle with electric TB done the 90mm swap? Do they see the same results?
#3
blownerator
iTrader: (20)
and looking at that, the 78 does not open anymore than the 90 @ WOT. Kinda makes the theroy of not getting 100% TPS go out the window!
The one thing we will never understand is the explenation of what the OE calls 100%. To me the 90mm TB is still a good mod that works VERY well.
The one thing we will never understand is the explenation of what the OE calls 100%. To me the 90mm TB is still a good mod that works VERY well.
#4
what a rush!
iTrader: (8)
Originally Posted by BigTex
Nice! I like the comparisons all in one video. Thats funny how the stock 78 ready 100% but doesn't really open full horizontal.
I agree with you on the TAC. If its truly programmed to look for a certain voltage range that is not the same as the LS2 TB, then thats probably where the answer lies. What I'd like to see now is someone with an electric throttle body from a 02 vehicle do some logging and list their sensor voltages at various levels. Has anyone with an 02 vehicle with electric TB done the 90mm swap? Do they see the same results?
I agree with you on the TAC. If its truly programmed to look for a certain voltage range that is not the same as the LS2 TB, then thats probably where the answer lies. What I'd like to see now is someone with an electric throttle body from a 02 vehicle do some logging and list their sensor voltages at various levels. Has anyone with an 02 vehicle with electric TB done the 90mm swap? Do they see the same results?
#5
blownerator
iTrader: (20)
Originally Posted by moregrip
BLOWN364 did an 02 Denali 90mm conversion and it opened 100%
I would like to see a picture of what he called 100%......I think the mystery has been solved IMO, the stock 78mm was open approx the same in the video and the 90mm at the 100% TPS reference.
#6
Moderator
iTrader: (14)
Nice vid
Your LS2 throttle body makes the same noise as mine does
The 1st third of my throttle response just isn't there. I'm wondering if guys with 04-05 trucks are having the same issue as their foot pedals are different part numbers than the 02-03 model I have in my truck. I will log some APP versus TPS and see where I'm at probably Wednesday or Thursday.
Grippy, can you post up those 02-03 foot pedal resistances I gave you? Anybody with an 04-05 truck could you post up your resistances too?
Bill
Your LS2 throttle body makes the same noise as mine does
The 1st third of my throttle response just isn't there. I'm wondering if guys with 04-05 trucks are having the same issue as their foot pedals are different part numbers than the 02-03 model I have in my truck. I will log some APP versus TPS and see where I'm at probably Wednesday or Thursday.
Grippy, can you post up those 02-03 foot pedal resistances I gave you? Anybody with an 04-05 truck could you post up your resistances too?
Bill
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#8
what a rush!
iTrader: (8)
Originally Posted by Bill Reid
Nice vid
Your LS2 throttle body makes the same noise as mine does
The 1st third of my throttle response just isn't there. I'm wondering if guys with 04-05 trucks are having the same issue as their foot pedals are different part numbers than the 02-03 model I have in my truck. I will log some APP versus TPS and see where I'm at probably Wednesday or Thursday.
Grippy, can you post up those 02-03 foot pedal resistances I gave you? Anybody with an 04-05 truck could you post up your resistances too?
Bill
Your LS2 throttle body makes the same noise as mine does
The 1st third of my throttle response just isn't there. I'm wondering if guys with 04-05 trucks are having the same issue as their foot pedals are different part numbers than the 02-03 model I have in my truck. I will log some APP versus TPS and see where I'm at probably Wednesday or Thursday.
Grippy, can you post up those 02-03 foot pedal resistances I gave you? Anybody with an 04-05 truck could you post up your resistances too?
Bill
Idle = foot pedal in idle position
WOT = foot pedal fully depressed
APP 1 (pins E & F) Idle = 2.680 kOhms , WOT = 4.52 kOhms
APP 2 (pins B & C) Idle = 3.382 kOhms , WOT = 1.506 kOhms
APP 3 (pins A & K) Idle = 5.98 kOhms, WOT = 4.05 kOhms
For the record… this is the pedal part and year info I obtained from my parts guy… more/less info for GENIII apps in ½ and ¾ ton… other applications may apply…
02-03 foot pedal – 15177923 – 02-03 Gas only, 04-05 Diesel only
04-05 foot pedal – 15120405 – 04-05 Gas only
06 foot pedal – 15107594 – 06 Gas only