jspeer23
New Member
- First Name
- Jeff
- Joined
- Jun 1, 2020
- Threads
- 1
- Messages
- 4
- Reaction score
- 1
- Location
- Fisherville
- Vehicle(s)
- 2020 Wrangler Oscar Mike Sting Gray
- Thread starter
- #17
Thanks for all the info...
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Aftermarket tuners gain hp by leaning out the air fuel ratio.
I didnāt say aftermarket tuners run the vehicle lean. The factory fuel curve is very rich and therefore safe. You can lean the factory curves out and gain hp but they dont lean the curve out so much to make the vehicle run lean.
This is an old manual.. FCA updated and my 2018 came with a note in the glove box stating that 87 is required but 91 for maximum performance.In all fairness the manual says for āoptimal performance ā use 91 octane.
My question is whoās racing their JLUR? There are far better choices for going fast than a Jeep!
But anyway, your Jeep, your money.
Gregj
The change in the manual only states what I said in an earlier post, if your engine is knocking, use higher octane. They both say the engine is designed to operate and meet emissions standards and provide satisfactory economy and performance with regular gas.This is an old manual.. FCA updated and my 2018 came with a note in the glove box stating that 87 is required but 91 for maximum performance.
Assuming that the aftermarket tuners are targeting maximum power, for the OEM tune to be richer it would also have higher hydrocarbons than the aftermarket tune. I highly doubt this is true.I didnāt say aftermarket tuners run the vehicle lean. The factory fuel curve is very rich and therefore safe. You can lean the factory curves out and gain hp but they dont lean the curve out so much to make the vehicle run lean.
The original question in the thread was can you run 87 gas in a 2T. I only mentioned tuners to illustrate there is a nice safe tune for the 87 octane and one of the things you can manipulate is the fuel and still be safe.Assuming that the aftermarket tuners are targeting maximum power, for the OEM tune to be richer it would also have higher hydrocarbons than the aftermarket tune. I highly doubt this is true.
In my experience NA aftermarket tunes gain most power from ignition & fuel timing manipulation, but are always still targeting the values shown in the chart above. If the engine is equipped with variable valve timing, even greater power gains can be found by fine tuning the crossover point (from the low camshaft to high camshaft). Continuously variable valve timing (such as the Alfa Romeo's GME 2.0) can have yet an even greater gain with aftermarket tunes. And then there is boost...
Agreed, just wanted to post the current manual page!The change in the manual only states what I said in an earlier post, if your engine is knocking, use higher octane. They both say the engine is designed to operate and meet emissions standards and provide satisfactory economy and performance with regular gas.
Like I said āyour Jeep, your moneyā. Mine āprovides satisfactory economy and performance with regular gasā.
Gregj