groffman056 Posted December 12, 2015 Share Posted December 12, 2015 any ideas Link to comment Share on other sites More sharing options...
Lee21490 Posted December 12, 2015 Share Posted December 12, 2015 Make it a 4.7l stroker. Changing your axle ratio's can help too. Link to comment Share on other sites More sharing options...
dunnc1991 Posted December 12, 2015 Share Posted December 12, 2015 I'm done Link to comment Share on other sites More sharing options...
johnj92131 Posted December 12, 2015 Share Posted December 12, 2015 Without a new engine? Put a supercharger on your old engine. The supercharger will boost your low end power in a way you can feel every time you drive. Not cheap - but you asked for power with out a new engine. Link to comment Share on other sites More sharing options...
daking Posted December 13, 2015 Share Posted December 13, 2015 new cam replace head with edelbrock alumn performance head up-grade to larger valves Change rockers to lighter weight and or better ratio. replace the exhaust system (header) replace intake manifold with ~2001 or so. larger Throttle body 4 hole fuel injectors ( or high flow if other mods support the flow) modify the CPS to advance timing (or remove adjustment tabs on distributor and rotate that) remove factory belt driven clutch fan, add all electric fans modify intake to bring in cold air (most aftermarket CAI for the jeeps are actually Hot air boxes) I modified factory air box to get cool air from cowl. Change the thermostat to lower ~180. plug in programmer to change fuel changing gears will give your engine greater leverage on the tires, making the engine feel stronger. (it's like using a ratchet with a longer handle) Also using smaller tires will give the feeling of more power. reducing rotational mass helps too. Link to comment Share on other sites More sharing options...
Pete M Posted December 13, 2015 Share Posted December 13, 2015 gears, gears, gears. best kick in the pants for the buck. what gears do you have now? what size tires? Link to comment Share on other sites More sharing options...
cruiser54 Posted December 13, 2015 Share Posted December 13, 2015 These spacey threads are kind of a pain. OP, please provide more info and don't start so many threads. Link to comment Share on other sites More sharing options...
Eagle Posted December 13, 2015 Share Posted December 13, 2015 If you have a '91 or '92, you can buy a high performance chip for the ECU. It increases power, but you have to run high-test gas with it. No, there is no chip available for the Renix years. Link to comment Share on other sites More sharing options...
92Eliminator Posted April 12, 2016 Share Posted April 12, 2016 Chip? What is this chip you speak of? Who makes and sells them? Link to comment Share on other sites More sharing options...
HOrnbrod Posted April 12, 2016 Share Posted April 12, 2016 If you have a '91 or '92, you can buy a high performance chip for the ECU. It increases power, but you have to run high-test gas with it. No, there is no chip available for the Renix years. Depending on the chip and how it's programmed, your compression ration ratio, and other factors there is no regulation or requirement for running high-test gas with it. I ran a Unichip for years and never ran high test nor did I need to. There was no preignition or pinging problem. The Unichip is on the intake heat shield in the pic below. It did work quite well until it developed an intermittent internal short. http://www.jeepstrokers.com/forum/viewtopic.php?f=5&t=387&hilit=unichip Link to comment Share on other sites More sharing options...
Tex06 Posted April 12, 2016 Share Posted April 12, 2016 Don, still have the Unichip? I just read your other write-up, didn't realize that it made such a difference. I'd be willing to take a chance on finding that short. Also, intake has just moved up to the top of the to-do list. A/C can wait a little while longer! Link to comment Share on other sites More sharing options...
HOrnbrod Posted April 12, 2016 Share Posted April 12, 2016 No, don't have it anymore. I had it wired in for about four years and it did great, then the engine started dying randomly. When I jumpered the Unichip out of the system, no more cotouts. So I sent it to Unichip in Hillsboro, OR to check it out. A tech mapped it for his BMW and drove it for two months with zero problems. He sent it back with the Jeep map and it still caused engine cutouts. I'd had it and sold it on Ebay to a guy in Brazil a couple of years ago for more than I paid for it who's still running it on a racing BMW with no problems. :dunno: It did well when installed on my rig. The Unichip program allows you to vary the MAP, TPS, CPS, and IAT outputs to the ECU for the best dyno numbers. Link to comment Share on other sites More sharing options...
benjy_26 Posted April 13, 2016 Share Posted April 13, 2016 There are ghetto-rigged options: http://www.angelfire.com/my/fan/MAP_adjuster.html Link to comment Share on other sites More sharing options...
Megadan Posted April 13, 2016 Share Posted April 13, 2016 How much money do you have to play with? No matter what option you go with, and a wide variety of factors, to add any notable power to said vehicle is going to cost you at LEAST $2000, and that is being generous. That would be using used parts or finding great deals and finding creative solutions while doing all of the work yourself.Otherwise, there are small bolt-on things that can be done, depending on the engine, that won't really net you a whole lot for your money.Ironically, the easiest and most affordable way to get more power from your 4.0L is to build a stroker like somebody else mentioned. That requires replacing your engine. :thumbsup: Link to comment Share on other sites More sharing options...
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