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Hunt 04-25-2010 10:25 PM

Improving performance of 4cyl
I have a 92 yj 5 speed and the 4cyl it has 31.5 x 10 tires.
What can I do to get more performance from the 4cyl?
upgrade / aftermarket ignition system? Exhaust system? any ideas?
I do like the 4cyl don't want to swap engines.

89YJproject 04-25-2010 10:32 PM

Air intake, Exhaust, throttle body spacer. Check these links. LINK 1, LINK 2.

birdhunter 04-25-2010 11:57 PM

The 4 is a good engine
Dont waste your money on Air intake or on a TBS

sevenservices 04-26-2010 10:11 AM


Keep it clean

Do your oil changes regularly

Keep good plugs,wires,cap & rotor

Run Lucas with your oil on the next change

Don't ever let it overheat, and don't over-rev it. (top 2 causes of engine failure)

Don't waist money on splitfires and K&Ns and all that... you won't gain enough to make a noticeable difference.

Enjoy for many years to come!!!

jdhallissey 04-26-2010 10:23 AM

Park it and walk?! :D BTW I have a four cyl so I know your pain.

tmulholland24 04-26-2010 09:32 PM

Im considering doing a snorkel because you will get about 5 hp to the wheels, better gas mileage, its a cool looking mod and gets cleaner air!

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