97-03 TJ 4.0 Jet Stage 1 or Stage 2 Chip

John Thomas · 03-25-2007, 08:05 PM

Can any one tell me if either of the Jet Stage 1 or Stage 2 Chip are worth the money. Or if there are better chips out there.
Thanks
JT

**Jerry Bransford** · 03-25-2007, 08:09 PM

This comes up every few days. Unless you're taking your TJ to the quarter-mile dragstrips, you won't notice any improvement except at WOT and high RPMs. I bought one of those chips before I knew any better and returned it for a refund within a few days. In normal Jeep driving conditions, unless the Jeep is being raced out behind the high school, they don't do jack.

97_tj · 03-25-2007, 10:29 PM

the rig i bought had one already on it that is the only reason it is on it like jerry dont waste your money it is a gimmick and also i am going to be taking mine off in a few days

John Thomas · 03-26-2007, 06:26 PM

Thanks, Is there anything out there that I should look at to get more get up and go with out a engine swap.
JT

**Jerry Bransford** · 03-26-2007, 08:33 PM

Quote:

Originally Posted by John Thomas

Thanks, Is there anything out there that I should look at to get more get up and go with out a engine swap.JT

You're running 33" tires. If your axles haven't been regeared to a lower axle ratio more appropriate to those 33" tires, your Jeep will be a dog. Regearing your axles to a lower ratio will do more to restore/improve performance than anything else. 4.56 would be appropriate if you're running a 5 speed transmission, cost averages around $1200 total for a complete regearing.

John Thomas · 03-26-2007, 08:50 PM

Thanks again, I will start looking around for some new gears.
JT

Xlr8n · 03-26-2007, 08:54 PM

Agree. In most applications, the Jet Chip doesn't do much. A programmer like a Hypertech gives better peformance, but they don't offer it for all years and the 4.0 just doesn't respond much to air/fuel/timing changes without going to a stroker kit.