Thoughts on this cold air intake?
- Thread starter Gio jeep
- Start date
You’re doing more damage when lugging the engine. Don’t be afraid to get those revs up a bit. As previously mentioned, 3k is the sweet spot. (If equipped, don’t pay attention to that shift indicator light in the dash)
With your 5-speed and 4.0L engine, you're slightly undegeared for 35's with only a 4.56. You'd be a lot better off power-wise and likely even mpg-wise with a lower ratio like 4.88. But with your hills I personally would go 5.13. No, neither of those ratios would cause the highway rpms to be too high.
I had a previous TJ running 35's, 4.0l engine and 5-speed with 4.88 gears and it was great. Since it appears you have some long steep hills in your area I would personally go with 5.13 which is a newer ratio that wasn't available when I chose 4.88.
Also, just confirming/hoping your rear axle is the optional Dana 44. The axle shafts that come in a stock Dana 35 rear axle are not strong enough for 35's.
HP and torque are two different things... I strongly doubt a tune is going to restore the power he needs for his 35's where torque is king.
Are used to hate mine with the 35s Jerry. However, after this tune it drives so much better, you can feel the power increase. You know I wouldn’t exaggerate either, it really made my rig so much better with the 35s. It’s not a race car by any means, but the power is felt.
Still, he needs the right gear ratio first and foremost.
Still, he needs the right gear ratio first and foremost.
I like their honest pricing too.
List Price: $300.00
Our Price: $300.00
Sale Price: $300.00
I'm actually running with the dana 35 right now. The axles have held up pretty good actually. Its the differential that has broke on me twice already lol. The Dana 44 is too expensive for me right now. Unless there's an affordable option somewhere.
With the correct lower ratio which would boost power to the axle, you're now even more likely to break an axle shaft which is very common with 35" tires. 35" tires and a Dana 35 are a notoriously bad combination.
I would upgrade the axle shafts from the factory carbon steel 27 spline diameter shafts to the larger diameter 30 spline 1541H shafts with a Super 35 kit from a good vendor like Revolution Gear. The Dana 35 has a good reputation with the Super 35 kit and 35" tires, it was tested extensively on some VERY tough rock crawling trails in Johnson Valley CA where if an axle can hold up there, it's going to hold up anywhere.
I suspect something unusual was going on to cause your differential breakages which are rare. Perhaps a bad setup on the gears or a rear lunchbox locker having been installed. Who knows but that's not common at all so long as you're running 35" or smaller tires.
I'm in Washington and will gladly trade you the CAI installed by the previous owner of my Jeep for your stock setup. Assuming the years are compatible of course.
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AdventureFamily
Member
As fun as cai parts and some more sucking sounds are.....they don't do anything to 4.0 to increase performance. Factory unit is very well designed.
Chrismsales
New Member
Newb question here but what all does a tune do for you? I have an 2006 Jeep 4.0 manual 6 speed and 3” lift on 35’s that I purchased last year. I can’t get this thing to go above 60 on the highway unless I have hurricane winds behind me. I assume it’s due to the gear ratio maybe but your comment made me curious.
At what rpm do you typically shift into the next highest gear? You will get lots of people saying you should re-gear but I feel like with a manual you have a lot more control over engine RPM than with the auto. I have 35's also but with the rubicon 4.10 gears. 75 or 80 is easy. I never use 6th gear unless I am on the interstate.
Results have not been reliably confirmed with a piece of equipment with proven accuracy like this.
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I came across this a few days ago:
https://trailheadoffroad.com/product/wrangler-tj-lj-cowl-intake-97-06/
It’s a cowl induction kit that works similar to the Windstar intake, except that the filter is put inside the cowl instead of the engine compartment.
Personally I would prefer a Windstar intake as it fits a larger filter, but this could be a good option for someone who needs a significant amount of space.
I doubt there is much, if any, performance benefit.
https://trailheadoffroad.com/product/wrangler-tj-lj-cowl-intake-97-06/
It’s a cowl induction kit that works similar to the Windstar intake, except that the filter is put inside the cowl instead of the engine compartment.
Personally I would prefer a Windstar intake as it fits a larger filter, but this could be a good option for someone who needs a significant amount of space.
I doubt there is much, if any, performance benefit.
A tune won't help you too much there. Your issue is that you are probably carrying a ton of extra weight (I'm assuming you have heavy steel bumpers, armor, etc., as oppose to aluminum?) and running the wrong gears.
A tune will help you pick-up around 15 WHP by advancing timing, ignition, and throttle maps. The tune on mine made a profound difference, but it's still not going to fix the issue you're having which I suspect is largely related to running the wrong gear ratio.
I want to see an episode of "Street Outlaws Memphis" with you (with tune) against NashvilleTJ. I will email JJ Da Boss about setting this up. My side bet with JJ is already in.
I want to see an episode of "Street Outlaws Memphis" with you (with tune) against NashvilleTJ. I will email JJ Da Boss about setting this up. My side bet with JJ is already in.
JJ Da Boss? Who is that?
You "Elite people don't have TV" Shame on you.
Street Outlaws Memphis Official Homepage and Shop (streetoutlawsmemphistv.com)
You
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