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Discussion Starter #1
Hey I'm a new owner of a 2002 Intrepid. Just wanted to know if you guys could drop me some info on where I can find mods for my intrepid. Got alot planned for it but I gotta take it one step at a time and I'm not sure where to start looking. If you could just point me in some directions it'd be much appreciated. Later

The One :D
 

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Welcome ForceOne! It's good to see someone else from Colorado on the forum. You picked the right place to get your questions answered, but you might not like what you are going to hear. There aren't many products available to us at this time. There are some parts, but for the most part you are going to have to experiment, and adapt. There are plenty of posts here to give you some ideas, but your first upgrade should be the intake.

There has been plenty of debate over which intake set-up you should use (K&n vs. homemade L-intake - see 2nd gen "Downloads"), but whichever you choose this will make a difference in power and sound. Exhaust system changes are also pretty common, and you can find plenty of info here on how to open up the trottlebody. Other products you might try include ignition system changes (MSD dis-4), chip changes, and turbo systems. No matter what you have to spend, your first up-grade should be the intake as it is easy, can be changed back (to avoid warrenty problems) and if nothing else, will make the car sound like it should.

Good Luck!!!

Dave
 

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Welcome :D
Also what mods do you want to do Just list the mods youd like to do. and hopefully we will tell you what you can do. ;)
 

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Discussion Starter #5
My bad. I meant to put some of that info down and forgot.
I'm running a 2.7 SE. I've been looking at the K&N Air intake system but with alot of different opinions I'm not sure about it yet. I've already got an appointment to have my intrepid looked at to see what I can do as far as getting a dual exhaust.
Do any of you know if a Ram Scoop hood is available for this guy? I'd definately like to look into that. Which will of course help with my decision on the Intake system. I guess one of the biggest things I am looking for is upping my horsepower. Money isn't a big thing but I'd like to get as much as possible for my money instead of just dropping it all on one or two things. Any info is much appreciated. Thanks

The One
 

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Hey, welcome..... My name is Brian "MoparPerformance" and I also have a 2002 Intrepid w/2.7L "SE". I am currently in the process of "Project Trep 2.7L". So far I have installed a K&N performance Intake and Dynomax Performance aftermarket exhaust. I think I could be puttin' out around 215-220HP right now and I will be dyno'ing soon and will share the results.

I am currently in the works of testing BOSCH Platinum 4+ spark plugs out for this engine. I will then soon later install an ASE chip after working with ASE to "tune it down" so I will only have more like a 10HP increase instead of the 22HP so there will be less stress on the engine.

I am hoping to have newer Chrysler PCM/TCM revisions flashed. I am also going to be installing R/T springs and stabalizer bar.

I hope to to get around 230-240HP out of it. I plan on taking it to the track against my dad's 4.6L Mustang GT, he'll beat me but I wanna go at it with him. I also hope to provide video footage of that and track times as well. My ultimate goal is to make this a mean fuel efficiant machine that can keep up with an R/T.

As far as the K&N Intake kit.... Here's a video you can download for you to see the results yourself and decide if you would want to go with it.

For best viewing, right click on the video link and select (Save Target As), and save it, then play it.

I think it sounds pretty raw w/some nice performance....

Video Of 2.7L Intrepid In Action (About 10MB)
Project Trep 2.7L

Here's a picture if you are interested.....

 

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Welcome I have a 2000 R/T. Mods so far 70mm TBI and the butter fly opens a full 90 Deg`s,Cone KN , Anti foam for the tranny, Block of side resonater and open the air box by cutting out the narrow 2 inch baffels, One Dyno Max muffler with twin Dual exhaust out lets. Replaced the stock forward muffler the main muffler and the rear resiantor. BOSCH Platinum 4+ plugs. And in the summer time i run in front Smaller Bridgestone Protenza RE 730/ 225_45-ZR 17inch. They really help the handling and grip much better on take off. And drops the nose of the car 1-1/4. This spring i am getting a shaker hood scoop for my car. I have Dynoed my car and with all the Mods i gained about 15 to 18 hp. Max Hp was 171.6 at 6,000 rpms and 182.5 ft-lb of Torque at 4,300 rpms the out side temp of 74.4. Hope this helps you.
 

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Originally posted by MoparPerformance:
That's restricted power to the front wheels right.....?
Those are the HP and torque figures to the wheels, not the flywheel.
 

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I've been corrected on sears having a dyno... it seems to me that someone locally did though... when I find out who it is we'l be talking.

Re; above, I think he meant 271 HP. I didnt notice untill you mentioned it ... funny how we only look at the last two digits.
 

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no those numbers are right. spook R/T used a chassis dyno which measure hp at the drive wheels. manufacturers use an engine dyno to measure hp output at the crankshaft. what this means is that the R/T loses 70hp roughly thru the slushbox and other driveline parts. it's over 30% loss.
 

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ask spook R/T
 

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Yeah Chrysler Corporation/DaimlerChrysler has a power restriction (supposed to be 30% form what I hear) to the front wheels, probably to prevent severe torquesteer and/or steering assembly/component damage and so people are driving around smoking their front wheels like crazy.

Damn! I was about ready to go to Sears. I wonder if anyone looked stupid going to Sears and asking if they had a dyno????

It's cool, I was about ready to run to Sears though. Later guys......
 

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Originally posted by MoparPerformance:
Yeah Chrysler Corporation/DaimlerChrysler has a power restriction (supposed to be 30% form what I hear) to the front wheels, probably to prevent severe torquesteer and/or steering assembly/component damage and so people are driving around smoking their front wheels like crazy.
So what are you saying? That DC purposely designed a shitty tranny to meet their "limits"???
 

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Are all vehicles measured that way? Are we sure we're not talking about gross / net HP?

Auto makers are required to report net HP (to the wheels) not gross (on the flywheel)... So I'm not sure if the 171 figure is what Spook meant.
 

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Gross and net horsepower are both measured at the flywheel. Below is a explanation of the two.

Gross Horsepower
Measured without any engine accesories (power steering, a/c, etc) and with engine timing advanced as much as possible to give the highest output numbers.

Net Horsepower
Measured with engine accesories. Measured exactly they way the engine would be presented to the owner of the vehicle. More accurate representation of power.

Spook was talking about a chassis dyno. Your car is placed on the rollers of the machine and cycled through the gears. Measurements are taken to determing how fast the car was able to move the rollers, and with simple math, the computers are able to figure out power ratings, top speed, etc.

The power the engine makes and the power it is able to send to the ground are two different things. Unfortunatley, DC has some very unefficient transmissions and a great deal of power is absorbed through them. It has little to do with DC purposly doing so, its just a result of design.

Now, not all autoboxes transmit power as poorly. For example the Ford SVT Lightning has a 4 speed automatic, and dyno sheets have shown bone stock Lightings to be firing off power ratings in the range of 345-360hp. Thats only a loss of about 6-10%!! In fact SVT engineers have stated that a 5 or 6 speed manual would actually degrade the performance of the vehicle. (Stock engine power ratings are 380hp.)

[ February 07, 2002: Message edited by: LHSer ]
 

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Ah, here we go... some facts. I think the way to interpret this info guys is that all auto trannies have some drivetrain loss.. in fact all trannies are going to exhibit this to a certain degree.
http://www.edmunds.com/ownership/techcenter/articles/43827/article.html

The article describes "NET" HP (what the manufacturer is requried to report) is actually still measured off the flywheel, except it includes fans, ac, etc... So there really is no way of comparing vehicle power in terms of an auto tranny because diferent manufacturers will have diferent restrictions.
 
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