Forward diff. Wavetrac and ring and pinion gears - Page 3 - Cherokee SRT8 Forum
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post #21 of 50 (permalink) Old 02-24-2012, 01:41 PM
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Ok, thanks for the help Chris. Would a 3.07 hurt my ET? Or would holding third with a 120-ish trap make up for it on the back half of the track?



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You could hold third to 128 probably with the mtcm. It would help you most by lengthening
first gear and getting rid of shortshifting.
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post #22 of 50 (permalink) Old 02-24-2012, 01:46 PM
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Yup what he ^^^ said...

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post #23 of 50 (permalink) Old 02-24-2012, 02:35 PM Thread Starter
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Good stuff. Thanks guys!


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post #24 of 50 (permalink) Old 02-24-2012, 02:50 PM
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If I understand this correctly. For the FI guys, you would be in the higher rpm boost range longer thus making the quarter mile quicker?


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post #25 of 50 (permalink) Old 02-24-2012, 03:00 PM Thread Starter
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If I understand this correctly. For the FI guys, you would be in the higher rpm boost range longer thus making the quarter mile quicker?

Thats what I understand of it.
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post #26 of 50 (permalink) Old 02-24-2012, 03:09 PM
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If I understand this correctly. For the FI guys, you would be in the higher rpm boost range longer thus making the quarter mile quicker?
Yep, the idea that your dropping you gear ratio down some from the 3.73 to the other options depending on what ends up being made available will greatly improve on shortshifting at the track, shifting into into 5th late in the 1/4 mile kinda sucks, the shift alone costs you time. Think if you can hold that gear longer and run the boost through...

Cruising at 80 mph at 2400 rpm would greatly improve economy in these trucks too! You'd be sipping gas if you're cruising at 60 lol.

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post #27 of 50 (permalink) Old 02-24-2012, 03:33 PM Thread Starter
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No short shifting, holding 3rd to 128, saving the time of at least one shift in the 1/4, cruising at a lower RPM, sipping gas, Is there a negative to this? Im in for sure!!!
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post #28 of 50 (permalink) Old 02-24-2012, 03:35 PM
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No short shifting, holding 3rd to 128, saving the time of at least one shift in the 1/4, cruising at a lower RPM, sipping gas, Is there a negative to this? Im in for sure!!!
The other upside is that you will be able to do 0-211 videos!! lol
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post #29 of 50 (permalink) Old 02-24-2012, 03:36 PM Thread Starter
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The other upside is that you will be able to do 0-211 videos!! lol
That might scare me a little too much! Might be worth a trip to Texas though.
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post #30 of 50 (permalink) Old 02-24-2012, 03:46 PM
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That would be insane to see a big HP Jeep at the Texas mile running 200+....
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