You know all this talk of greater reliability etc.. is fine and all for someone who doesn't wrench on their vehicle. For those of us who do, a TFI upgrade is nearly pointless, and will have the effect BJ and SD are talking about. Even if you were to do the mod, the increased fuel economy would never be noticed if the carb isn't rejetted and tuned.

Doing a TFI as a bolt on upgrade for more performance is a waste of time unless the carb is tuned for a lean cruise rich power mixture.

If you want bolt on power the best thing you can do is get a TBI or MPI fuel injection kit. These kits come with a more efficient fuel delivery system that is tuned to make smooth clean power at all speeds and loads. EFI addresses off camber choking, hard start when cold, automatically adjusts mixture at different altitudes, better emmissions etc... Basically all the nuances of a carburetor will be eliminated.

TFI will give a reliability increase. But if you maintain your vehicle, you won't have a performance increase with TFI alone. Bolt on performance increases come in the form of EFI, Camshafts, headers, ETC... If you want performance, buy one of those, otherwise spend your spare cash on maintaining what you have and you'll have a good running jeep for a long time. <img src="/forums/images/graemlins/kewl.gif" alt="" />