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Bought a 99 RS and need some advice for mods

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ilyag
10/9/2007 10:07:33 AM
Hello
So I just bought a 99 eclipse RS and want to put some things on it. I was thinking about a cold air intake and was considering K&N. Was wondering what people think about K&N. It seems to be cheaper than Injen and AEM which is good for me cause I am kinda short on cash, but if it's not as good as injen or AEM I prefer to wait and buy something good.  Also, does anyone know of a good site to buy it on?
Any other suggestions on what should I put into the RS to make it go a little faster?
Thanks!
bestwiseguy
10/9/2007 10:29:47 AM
K&N is a good brand in my opinion, ive used them on a few cars in the past and have never been disapointed.  If you are looking to gain a little extra power than you will also need a good catback exhaust system.  You need to be aware though that the 420a engine you have is never going to produce high hp numbers without alot of money to dump into it.
ilyag
10/9/2007 10:56:12 AM
Thx!
I know that I won't be able to modify the engine to give much more HP without puting a lot of $$ which I don't have... I am just looking for some small mods that would make my car go a little faster.
Thanks for the reply, any suggestions where I should get the cold air intake from?

bestwiseguy
10/9/2007 12:02:42 PM
In my opinion it really doesnt matter on the brands cold air intakes. you might even try to look on ebay for a decent one. As far as the exhaust goes i think greddy is one of the best around, and it will make your car sound amazing.
dorian7
10/9/2007 9:47:16 PM
What seems to usually work out very well and cheap is buying an intake off ebay, use all the parts and hardware but ditch the filter and buy an AEM or K and N replacement one.
TheEngineer
10/10/2007 4:28:08 AM
quote:

ORIGINAL: dorian7

What seems to usually work out very well and cheap is buying an intake off ebay, use all the parts and hardware but ditch the filter and buy an AEM or K and N replacement one.

The one thing ive seens from ebay piping is that the bends on them suck. The hangers dont always line up correctly and the welds are often crap and the hangers can snap. Id just spend the little extra and get a good kit like aem or Injen. Either of those are good.
bestwiseguy
10/10/2007 6:27:58 AM
It just seems pointless to spend more money than you have to on a cold air intake.  they will both have about the same hp gain, which isnt much at all.
TheEngineer
10/10/2007 7:04:24 AM
quote:

ORIGINAL: bestwiseguy

It just seems pointless to spend more money than you have to on a cold air intake.  they will both have about the same hp gain, which isnt much at all.

i agree about the HP gains but you arnt paying more for HP you are paying more for quality of material and fitament in the engine. Like i said there are alot of problems if you get the wrong ebay one and you could end up spending more becuase you have to buy a new one. Know what i mean. It happened to emonz when he got an ebay brand for his old 3g. The hanger snapped for the CAI pipe and because its a 2-peice he just made is a short ram. However the intake no longer had any way of being supported and it ended up putting a crack in his intake manifold. So  he could have saved alot of time and money by spending the little extra on the brand intake. Dont get me wrong there are some good ebay intakes. But just know there is a risk involved in getting it cheap
Sebba
10/10/2007 9:34:15 AM
Do some fuel mods. Pour a can of gas all over it... then get an aftermarket ignition... just something simple like a match........ and watch : )
RCJr9186
10/10/2007 9:58:40 AM
ahahha i'm with Sebba here.    no but really, with your engine you can buy an Ebay CAI and cat back exhaust and probably see the same numbers from a name brand which will cost you anywhere from 2-10x more.   on another car, with a decent engine, that would actually take mods i'd never give you this advise but for your car, for your engine, yes ebay is ok.
TheAdvocate
10/10/2007 8:38:44 PM
Just have to be carefull with ebay stuff..  I got a cold air intake from it a while back, and the inside of the tubing was crap...  It had little pieces that came off and went into the turbo..   It ate the blades up on a t25 real fast..  After that I ditched it and put a 14b turbo on..   But when you get it, just make sure to check the inside of it to make sure its smooth..  If its not, that crap will be falling off over time and going into your motor.
DunDun96
10/12/2007 10:21:31 AM
A cold air intake will only give you like a 5HP boost. Id say to start, buy some headers, dwonpipe, and new CAT exaust.
bestwiseguy
10/12/2007 10:29:54 AM
All that combined might give you about a 10 hp gain.  That motor just does not take well to bolt on parts.  But at least it would sound really good.
RCJr9186
10/12/2007 11:19:19 AM
depends on the exhaust you get, i had a thermal cat back and it was loud as sin and i hated it.     you can take DunDun's advice (btw there is no downpipe on a N/A car) and get ur cat-BACK exhaust, high flow cat or test pipe, header and intake but you will see..... oh, mabey 5wp out of all of that.    here's a write up on the 420a that i just did, read it, learn from it lol.
________________________________________________________________________________
 
This is being made for those hundreds of people out there that just bought their 95-99 Eclipse non turbo but had the stereotype label in your head that all eclipses are fast, or can be fast relatively easy.    This information, sadly, is not true. 
The second generation Eclipse came with the 420a engine, 2.0 liter, Dual OverHead Cam (DOHC), In-Line 4 cylinder engine N/A (naturally asperated = non turbo'd/non supercharged).    This engine comes with a base horsepower rating of 140hp from the factory.    This puts the engine between 105 and 120whp depending on the type of dynograph used.  This is also the engine used in certain years of the Dodge Neon and Dodge Avenger.
In a nutshell, this engine was built for reliability and long term use, not street performance and modifications.
I'll start by listing the mods that i had done to my Eclipse (performance wise) just to give you a good idea of how poorly these engines take performance mods:
99 Eclipse GS OZ Special Edition
-Thermal Research and Devopment Cat Back Exhaust
-OBX Racing high flow cat
-OBX Racing Header
-OBX Racing Intermediate Pipe
-AEM Cold Air Intake
-Port and Polished Throttle Body
-Greddy Grounding Kit
-EGR Blockoff Valve
-Cometic Head Gasket
-Venom 400 Performance Chip
-Stripped interior including Stereo system (nothing but driver seat)
Yellow Top Battery (relocated to trunk)
On a mustang Dynometer (the heartbreaker of all dyno's its called) i put down 111whp.    111WHP!!! how rediculous is that?
I added it up before i sold my car and found out that i had spent over $1500 on this car's performance to only gain... mabey 5whp.   To give you an idea of how fast/slow this car is on the street i would barely pull on 6 cyl Mustangs, keep right up with 6 cyl Cameros, walk Grand Ams, and a few hondas around here but other than that... that's just about it.   

HERE ARE YOUR CHOICES:
1.) Intake, Exhaust, and a few other nick nacks to make it go a little faster and leave it at that.

2.) Nitrous - i've only met one person that ran nitrous but he had a 50 shot set on it and said he put it on a Dynojet (very forgiving and very generous dyno) 162whp.   You can pick up a decent nitrous kit for $400-$1000 depending on how detailed you would want to get with the kit.   You will also need a wideband, tune, probably a new clutch, exhaust and intake to run the system safely and realize the full potential of the nitrous.

3.) Turbo - They make turbo kits for this engine but i will never recomend it.  Here is why: a good turbo kit for this car will run you between 2800 and 3800 bucks.  There are NO kits on the market that come with everything that you need.   In every kit you will need at least 1 or 2 more things.  Not to mention if you do add a turbo kit to your car you will only be able to run 8-10psi before the bottm end gives out.  Another thing that most people don't think about when buying a turbo kit for their car is all of the things that they will have to upgrade to make it reliable such as a clutch, wideband o2 sensor, tune etc.  
You can piece together your own turbo kit for less than the cost of a turbo kit from a company but you will stil end up spending at least 2000 in the process to, yet again, only run between 8 and 10 psi.
Here's a list of the absolute minimum to turbo this engine:
-exhaust/turbo manifold
-turbo
-wastegate
-o2 housing
-downpipe
-intercooler piping
-front mount intercooler
-blow off valve
This is the absolute minimum, to run the car safely you will need:
-wideband o2 sensor
-boost gauge
-boost controller
-tuning device
-tune
At this point you will be reaching the maximum limits of your bottom end of your engine and you cluch is toast so you now have to have a new clutch and if you want to run anything over 8-10 psi you'll need:
-forged pistons
-forged rods
-piston rings
-new main bearings
-new rod bearings
-head studs
-main studs
Now you are ready to run up to 18-20psi.   This is the maximum limits of your head so you won't be able to run over this.  Also, i have never spoken to anybody who had taken the time to build this far so i have no idea what the max PSI or HP the transmission can hold.
At this point we are at apx 4500-6000 depending on if you got the parts new, used, refab'd, from a friend, whatever.
At 20PSI on a rebuild bottom end with forged-turbo happy pistons with a good compression ratio you will be realizing between 280-350whp depending on the size turbo you have, compression ratio, street tune, dyno tune, tuning device... there are many fators.

HERE IS THE POINT OF EVERYTHING:
To get your 420a to realize 300-350whp you will have spent over 5000 dollars ON TOP of the cost of the car... lets say... 2000 dollars, so we are at apx 7000 dollars on the build.
You can get a 2nd generation GS-T eclipse between 3000-5000 these days.   If you find the right deal you can find these cars already with mods and a 6 bolt swap.    So lets say for simplicity reasons that you get a decent GS-T with an intake, exhaust, and manual boost controller for 5000.  You can put 1500-2000 dollars into this car and have a comfortable 350whp with the option to put a larger turbo on there and run betwen 400 and 500 whp  on the stock bottom end.

So, lets look at the facts.   You can have a maxed out head on top of a rebuilt bottom end with a turbo at 350whp and nowhere else to go IF you haven't blown your transmission yet.       OOOORRRRRR a comfortable 350whp with room to add much more hp on the stock engine.     Both for the same price.
 
____________________________________________________________
 
there you go, all set :)
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