more speed

[x3mtm]

hi, y'all.....i have a durango... pretty much stock... i've only done some outside body work.. but now i want to go into the engine compartment and make it go faster..... so if anybody know how could i make my durango go faster....wirte back if u please...i need ideas...im thinking bout outtin a supercharger on it, but maybe there is more i could do to it other than just a supercharger?.....help would really be apreciated.....L8R.

[cbreeze191]

Replace your stock PCM. Just go with the Mopar Performance PCM. If your stock one hasn't gone out don't wait for it to, the only people who know what they're talking about when it comes to PCM's are those on AF. You'll definetly notice more HP. Test: Try laying rubber with the stock PCM, then replace it. WOW. Total after self install and taking back to dealer to enter vin was 412.00. very satisfying purchase. Stock was even more but why bother.

[x3mtm]

Hey Thank For The Tip...now How Can I Get One Of Those Pcms Thingys....i Mean I Looked Online And Cant Find Any.......apreciate The Help.thanks

[cbreeze191]

I ordered mine straight from the dealership. Make sure you order out of the Mopar Performance catalog. PCM = Power Control Module. Its a little computer mounted on the passenger side fender. The Mopar Performance upgrade will adjust tranny shift points, and also air/fuel intake among other things. So a nice K&N filter would also be a good add on. Thats next on my list.

[john4.7]

Remember, if your supercharge it you're going to have to run premium fuel. Also depending on the amount of boost you run you'll need to have forged pistons put in to. That said you should do bolt ons and see if you're happy first and then opt for the charger if you just can't get enough. Full intake with plenum ( like K&N fipk), exhaust, underdrive pulleys, larger throttle body, high flow cats or lose them depending on state. Remember, your tranny will be the first to fail if you up the power too much so you'll need to have it beefed up too.

[x3mtm]

hey thanks for the tip, ill keep it in mind, i didnt know you had to do all that b/c of putting a superchrger on. by the way, what is the "bolt ons" you talk about, im not familiar with that. if you got anymore tips, let me know. thanks

Originally Posted by john4.7

Remember, if your supercharge it you're going to have to run premium fuel. Also depending on the amount of boost you run you'll need to have forged pistons put in to. That said you should do bolt ons and see if you're happy first and then opt for the charger if you just can't get enough. Full intake with plenum ( like K&N fipk), exhaust, underdrive pulleys, larger throttle body, high flow cats or lose them depending on state. Remember, your tranny will be the first to fail if you up the power too much so you'll need to have it beefed up too.

[john4.7]

Bolt-ons are the basic modifications done to an engine that don't involve pulling it apart and doing anything internal. Bolt-ons are a way to make power that's easier than ripping the engine out and pulling it apart. If you have anymore questions let me know.

[x3mtm]

hye im back. im not a big mechanic guy, im just 19 and still learning. what kind of modifications are you talking about. is it the ones you told me before with the pulleys and all that stuff or is it something else. also, i was thinkin of putting a performance chip (i think is called a pcm) people say it make the car go faster. would that help? once again im open for suggestions. thanks

Originally Posted by john4.7

Bolt-ons are the basic modifications done to an engine that don't involve pulling it apart and doing anything internal. Bolt-ons are a way to make power that's easier than ripping the engine out and pulling it apart. If you have anymore questions let me know.

[john4.7]

I'll try to help you out if I can. In the search for power you need to first find the hidden power already there. This is done by making the engine operate as efficiently as possible. Intake, so the engine doesn't have to strain as hard to get the air it needs. The underdrive pulleys slow down the accessory speed (Alternator, water pump, powersteering pump some kits vary in what's included) in relation to the operating speed of the engine. It's like the rear gears on a bike the larger the gear the less effort is necessary to operate and the slower you go. The same goes for an engine underdriving makes it easier to operate the accessories thus letting you feel more power although the engine itself isn't producing anymore. A performance exhaust allows the engine to evacuate spent gases more efficiently thus helping to make more power. Exhaust works best in conjunction with intake thus improving the pumping ability of the engine. In order to make power the engine needs a steady supply of fuel and air the faster it can do this the more power it will generate, exhaust helps because the engine can't get a fresh supply of air and fuel until it gets rid of the old spent gases. A larger throttle body also helps with the engines pumping ability. the throttle body is like the engines mouth. the bigger the mouth the more fuel and air you can ram down it's throat. A throttle body spacer can be added behind this. This helps by giving the air time to straighten out in it's flow. The less turbulence in the intake charge the more port velocity you will achieve. Port velocity is the speed that the air/fuel mixture travels through the port of the head. The faster the charge moves the more you can get in a cylinder while the valve is open. You can also upgrade the ignition with high performance coils this lets you burn the fuel charge completely using more voltage and/or multiple spark. If you have anymore questions let me know I'd love to help.

[john4.7]

i was thinkin of putting a performance chip (i think is called a pcm) people say it make the car go faster. would that help? once again im open for suggestions. thanks[/quote]

All that talkin and I forgot to answer your other question. Modifying the ecu is a good idea. Instead of a chip, spend a little more and invest in a power programmer like Hypertech. This allows you to tune for more power. Also you can firm up the transmission shifts which will aid performance and extend the life of the transmission. By speeding up the speed of the transmission shifts you save the clutches because they don't have to slip as long in between shifts. Also a chip generally contains only one tuning program which might be optimal at one point but less when more things are modified. A power programmer lets you continue to tune the ecu as you modify other things thus letting you always run the optimal tuning set up for the modifications performed. Some programmers also let you read trouble codes. So if the check engine light comes on you can scan it yourself. You can also recalibrate the speedo for different sized tires. Hypertech programmers sell in summit for about 350. I plan on getting one soon myself when I have some spare money.