Why do rven other Jeeps pass me buy?

[slydog]

1057331

I've go a 93 YJ 4Cyl. with 31.5" tires, fuel injected, higher miles but runs really good. I've replace the injectors and pulled the restrictor out of the filter. When i'm on the highway, going up a very shallow gradient, I'll loose 12-18 MPH. Once another Jeep blew right buy me (maybe he had a 6). Is there anyway to fix this? How can I see what type of gears I have? Any chips or air intake gaggets?

thanks [addsig]

 

[jprtroy]

1057334

The 4 cyl's came stock with 4:10. The larger tires are whats keeping your speed down on the hills. Swap out the 4:10's for 4:56's and you should get some of that speed/power back. The stock tire size I stink was like 27" maybe 29" fine for the 4:10's (there are others here that will know the tire size for sure)



[addsig]

 

[Joopin]

1057360

Here's an intake thingy...

Just make one like this, cost me 50 bucks, 45 of it was for the filter... Gears is your best bet though.[addsig]

 

[Bounty__Hunter]

1057361

It's a 4Banger thing, get used to it. Unless you regear the axles (expensive), it will be tough to get performance back from adding larger tires. Engine performance mods help:

• 4.0L Throttle Body
• 4.0L Throttle Body spacer
• Airtube and conical K&N filter
• Cat-back performance exhaust
• Electric fan in place of mehanical fan
• Perfromance hi-output coil
• Quality plug wires and Champion Truck plugs gapped at .050"

This is just for starters. There is a lot of engine work that can be done, I'll be installing my Mopar Performance camshaft soon, we'll see how that helps the little engine that could :lol: [addsig]

 

[jhiggins]

1057461

Or you could just buy a new jeep and forget the rest.... :-D :-D [addsig]