Need Gear Help, Complicated Situation...Trailer, Heavy Jeep and 35s Expedition Style
01-08-2014, 10:30 AM
#11
JK Freak
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In the USA 3.8 Liters = 1.003854 Gallons.
"In 1824, the various different gallons in use in the British Empire were replaced by the imperial gallon, a unit close in volume to the ale gallon.
It was originally defined as the volume of 10 pounds (4.5 kg) of distilled water weighed in air with brass weights with the barometer standing at 30 inches of mercury (102 kPa) at a temperature of 62 °F (17 °C). In 1963, the gallon was redefined as the volume of 10 pounds of distilled water of density 0.998859 g/mL weighed in air of density 0.001217 g/mL against weights of density 8.136 g/mL, which works out to 4.546096 L or 277.4198 cu in. The Weights and Measures Act of 1985 switched to a gallon of exactly 4.54609 L (approximately 277.4194 cu in)."
Imperial units - Wikipedia, the free encyclopedia
I know... TMI.
My 4.88 for D30 front and D44 rear being mounted on Truetracs:
"In 1824, the various different gallons in use in the British Empire were replaced by the imperial gallon, a unit close in volume to the ale gallon.
It was originally defined as the volume of 10 pounds (4.5 kg) of distilled water weighed in air with brass weights with the barometer standing at 30 inches of mercury (102 kPa) at a temperature of 62 °F (17 °C). In 1963, the gallon was redefined as the volume of 10 pounds of distilled water of density 0.998859 g/mL weighed in air of density 0.001217 g/mL against weights of density 8.136 g/mL, which works out to 4.546096 L or 277.4198 cu in. The Weights and Measures Act of 1985 switched to a gallon of exactly 4.54609 L (approximately 277.4194 cu in)."Imperial units - Wikipedia, the free encyclopedia
I know... TMI.
My 4.88 for D30 front and D44 rear being mounted on Truetracs:
Last edited by Sahara Lee; 01-08-2014 at 10:36 AM.
01-10-2014, 09:17 AM
#12
JK Newbie
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01-10-2014, 09:39 AM
#13
Sponsoring Manufacturer
01-10-2014, 09:44 AM
#14
JK Jedi Master
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One thing to keep in mind is that re-gearing simply brings the engine rpm's back up to a more useable range to help compensate for the bigger tires/lift/added weight. It is not instant hemi or supercharger.
Even with 5.38's, (no longer made for the d30, just using as an example) don't expect to be comfortably cruising up mountain passes at 80 mph, especially while towing a trailer. With the 3.8, expect slower speeds and higher rpm's regardless of the ratio.
Even with 5.38's, (no longer made for the d30, just using as an example) don't expect to be comfortably cruising up mountain passes at 80 mph, especially while towing a trailer. With the 3.8, expect slower speeds and higher rpm's regardless of the ratio.
02-23-2014, 07:20 AM
#15
JK Newbie
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One thing to keep in mind is that re-gearing simply brings the engine rpm's back up to a more useable range to help compensate for the bigger tires/lift/added weight. It is not instant hemi or supercharger.
Even with 5.38's, (no longer made for the d30, just using as an example) don't expect to be comfortably cruising up mountain passes at 80 mph, especially while towing a trailer. With the 3.8, expect slower speeds and higher rpm's regardless of the ratio.
Even with 5.38's, (no longer made for the d30, just using as an example) don't expect to be comfortably cruising up mountain passes at 80 mph, especially while towing a trailer. With the 3.8, expect slower speeds and higher rpm's regardless of the ratio.
03-09-2014, 06:15 PM
#17
JK Super Freak
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Don't overlook look the fact that you changed coasts and elevation. Although modern electronic engines are designed to compensate for atmospheric changes, I don't think they do a great job of it. Had similar issues when living in Idaho, made the proper engine tuning adjustments and made a huge difference. Combustion engines need the proper mix of air and fuel to work at optimal performance, just like the human body, I'll bet your JK isn't getting that. Just a thought and good luck.
Modern engines will compensate for proper stoichiometric air:fuel ratio. Horse power/torque still suffer greatly at altitude.
High elevation = thinner air = less gas used during combustion = less power.
Sent from some string and a few tin cans.
03-10-2014, 08:35 AM
#18
JK Enthusiast
Thread Starter
The Jeep is a totally different beast now. I am loving the 4.88s. I really cant tell the trailer is back there. I am very happy with my choice. Thanks so much for the help
03-10-2014, 01:03 PM
#19
JK Junkie
03-10-2014, 04:00 PM
#20
JK Enthusiast
Off subject, but just like anvil, your color is freekin awesome on a jku. Especially with the lift and black wheels. And your expedition set-up is just great. I sure hope I had justifiable reasons to set it up in such a way with the roof rack, roof tent and trailer.
I did something along those lines minus the trailer with my Land Rover Discovery, but I was just a poser. Trying to avoid this now...
Sent from my C6616 using Tapatalk
I did something along those lines minus the trailer with my Land Rover Discovery, but I was just a poser. Trying to avoid this now...
Sent from my C6616 using Tapatalk
Last edited by Da10A; 03-10-2014 at 04:26 PM.