Speeding up a 3.7

[Matteo]

I just got a brand new 3.7 and was looking to speed it up but i heard not much could be done and what can be done wouldnt do much... does anyone have any advice as to what i can do or is it really not worth it to do anything?????

[LTrainGC]

Personally, I don't think it is worth it because you are going to dump so much money into it and it will still be a slug.

But, if modding vehicles brings you enjoyment and you want to do it, then go for it.

[B.P.O.D]

lots of threads about this already too... depends on what you call "speeding it up"

---------- Post added at 01:41 PM ---------- Previous post was at 01:40 PM ----------

ull find this helpful

http://jeepgarage.org/showthread.php?t=276

[Scottina06]

there are many possibilities...but your gonna have to be an innovator to get it done

[White WK Swagga]

Off the bat I'd say Intake, Exhaust, the powerwire iffy. Other that that I'd say spark plugs and premium gas. You should see some improvement. It'll be faster than stock but it's still not a hemi. But if your pockets run deep you could do turbo but for that money you could trade it in for a hemi or 4.7

[Megatron]

Ill be honest. Just use the cash to make the jeep pretty on the outside and interior also.

[Marlon_JB2]

What they said, minus the turbo because you're just going to blow the engine. Kenne Bell made a supercharger for the 3.7L back in the day but because of the way the 3.7/4.7 is designed, the supercharger blew the piston rings.

[Dylans3960ccs]

there is a significant way to speed up in 3.7, all you have to do is put your foot down :D

[NHWK05]

I would do a Cold air intake and exhaust for starters, then airram.com power wire.

[mzh29]

I would put money elsewhere, nice lights, good sound system, tint the windows, maybe the mopar body kit, make it luxurious and keep it spotless. It doesn't have to be fast to turn heads or be a really nice looking rig.

[White WK Swagga]

Lets see some pics Matteo... I just got a brand new 3.7 Limited too. It's 4 months old...

[Megatron]

Is there an exhaust for our small ponied jeep? That will give him a lil bit of roar?

[Matteo]

Ill put some pics up as soon as i figure out how to work my camera lol...

does the powerwire really do much, what does it do??

[Megatron]

Ill put some pics up as soon as i figure out how to work my camera lol...

does the powerwire really do much, what does it do??

Hopefully these answer your question homie.

1. Will this harm my PCM in any way.

No. The POWER WIRE only simulates intake air temps that are 20 degrees cooler at all times. Your PCM will not know any better and it will still adjust as advertised. The only difference is that the POWER WIRE causes your PCM to advance the timing by 3-4 degrees at WOT. This is where the 8-10RWHP comes from.

2. Will the POWER WIRE cause my engine to run rich?

No. Your PCM is programed to keep your Air Fuel Ratio nailed down to 14.75:1 at all throttle positions below Wide Open Throttle (WOT). So the POWER WIRE can not effect your Air Fuel Ratio anywhere below WOT.

The POWER WIRE will increase your AFR by approximately 2.5 percent at WOT only. In most cases thats enough to help improve on the factory slight lean setting.

3. What does the POWER WIRE do? How does it make HP?

The POWER WIRE alters the Air Temp Signal to your PCM to read 20 degrees cooler at all times. So if the actual intake air temps are 90 degrees then the POWER WIRE alters the signal to read 70 degrees. This causes the PCM to advance the timing which is worth approximately 8-10RWHP.

4. Will the POWER WIRE hurt my fuel economy?

NO, in most cases the POWER WIRE will increase your fuel economy by 1-2MPG when driven under a light foot. As long as you do NOT hit Wide Open Throttle the POWER WIRE can NOT add more fuel. The MPG gains come from the degrees timing advance effects the POWER WIRE induces.


On the flip side, at WOT the POWER WIRE does cause your PCM to add approximately 2.5 percent more fuel. So If your at Wide Open Throttle allot then YES your fuel economy will take a dive by approximately 2.5 percent. But the additional 8-10RWHP HP at WOT makes up for the slight loss in fuel economy.

Bottom line, if you want increased fuel economy while useing the POWER WIRE DO NOT put your foot to the floor... but what fun is that.

---------- Post added at 05:29 AM ---------- Previous post was at 05:27 AM ----------

Check out this other link too we have in the forum..

http://jeepgarage.org/showthread.php?t=276

[BUBBADOG]

I just got a brand new 3.7 and was looking to speed it up but i heard not much could be done and what can be done wouldnt do much... does anyone have any advice as to what i can do or is it really not worth it to do anything?????Im going to tell u like they told me when i asked the same thing about my 4.0l...TRADE IT IN

[Matteo]

Would this airfilter fit the 3.7?? would it help:

http://www.airram.com/product.php?categoryid=646&productid=105

would this powerwire fit my 09 3.7??

http://www.airram.com/product.php?categoryid=646&productid=21

[NHWK05]

The sir filter will not just "fit" your jeep, you need the entire air intake kit.

If you want i will sell you my AFE cold air intake from my 4.7 that will/should fit a 3.7. Its only 2 months old. $250 shipped.

[Matteo]

as for the powerwire??

[NHWK05]

It will fit, there is a drop down box that lets you select 3.7

[Matteo]

yea but it says 1999-2008...

I have an 09

[NHWK05]

I dont know then. Someone else will jump in i am sure.

[White WK Swagga]

I'm like 99% sure everything 08 is 09