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Hey I did a dyno on my 4.0l and got 214.82 rwhp and 229.66 rwtq.
I never got a stock dyno and was wondering what is the stock rwtq rwhp average.
Also was wondering if 214.82 rwhp and 229.66 rwtq is the avg gain for a 4.0l engine with jba shorty headers, 63 series k&n cai, and 14in magnaflow muffler. Because the tq increase doesn't seem correct .
I did the dyno on a dynojet research by vaca performance
Dynos vary soooo much its hard to really compare one to another.
But on an average I've seen most stock dynos in the 180-210rwhp range, with 220-240rwtq.
Looks like you picked up some power up top, but not much in your low-mid range (where you're peak torque will happen). But that's not to say that you didn't move your peak torque down or up.
Do you have the graph to post?
I have my stock XRunner dyno listed on here in power and torque on a DynoJet.
The DynoJet is the best dyno for comparing different trucks in different locations. It has the greatest level of consistancy from one dyno to another due to its overly simplistic design.
The best course is to get a very good before dyno before you start modding and tuning, then keep using the same dyno for retests as you progress through your mods to see where you are improving and where you are not. The before dyno on your own truck is very important so you can see what the improvements are on your truck with your combination of mods and tuning.
Roy if your gonna wait why do it. You'll enjoy your truck from100,000 to 135,00 than you'll tire of alternators and water pumps going out and than sell it. Do it now and enjoy the whole trip. The X1 can be as conservative or as agressive as you like. And xrunnit was exactly right. They vary so much that it's not even worth comparing. And let alone the weather type changes. But if you want the most of your mods get the X1. I didn't see a worthwhile difference in performance till I got the maf Cali and wow what a diff. But the X1 is a much more advanced piece of equipment and can be adjusted for anything you throw at it. S/C without a flash etc etc. And like balboa said leave the tuning to the pros. It's advanced enough that if you don't know what your doing you can pop your motor. Just because you know how to do a bench press doesn't mean you can bench 500lbs. Well the X1 is a ton of variables. Also most people won't see a gain in performance with a exhaust. Usually neutral HP but a loss in tq. But the more air you start to flow the more that high flow exhaust will start improving. And with the jba's they're tourqey Lil fellas. I love mine and they got rid of resonation and quieted her down while cruising.
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