IM gonna start this little section off w/ a launch on a stock car please vist that link and leave launching tips if possible thanks.
Ok so back to the mods I quicly had to go stage 2 so i bought a cobb ap just like most other people would. I wen w/ the ap simply because it allows me to monitor my car as well as check the trouble shoot codes. I can make sure my car isnt knocking w/ the ap.(Kocking is what causes motors to blow for those of you who dont know.) It also allows me to etune in which i can datalog and then send the info to tuner and he can send me tunes via email this is great for me since the rep of local tuners is way down under in my area. I also liked it cause i can easily reflash my car at any time and especially for the anti theft map... You can tune your self using cobb software u can download from their web site or get costum tunes like a protune. So dont ever let anybody tell you your limtied when using an ap or let them say you cant tune as good cause you can and very good too you just need a custom tune from somebody who knows what their doing....Anyways i got mine for 400 and some off ebay so look around oh and if you happen to buy a used one make sure your getting an unmarried one.
call cobb they happy to help... but if you wanna do it your self but kind seem to do it cause your running into problems make sure your ap is up to date connect it to ap manager/ updater to be sure... sometimes its the simple things that you over look that hold you back.
OK so inorder to go stage 2 i had to get a down pipe (dp) i chose to go w/ invidia cause it was one of the best companies out w/ a catless dp out for my car, and the price. Invidia is a good company at least from what i heard so i decided to go w/ them. It had a great fit and didnt change the sound to much however it did make it a little deeper so if your worried about your car being to loud w/out cats iits really not.
If you hear the clip w/ my perrin exhaust and compare this one there really not much of a difference.
Plus they are the only company to make bellmouth/divorsed dp which means there is a little piece that seperates the gases as the come out of the turbo this helps alot of smaller (stock) turbos however if you are looking at upgrading your turbo like me a bellmouth w/out the divorced part may be better cause u may have to buy a new dp w/ your new turbo if you get a divorced.
also if you get a catless dp be sure u can pass inspection and you wont want to get it if u cant stand the smell of gas. But hey if you dont mind those to im sure you wont mind the big red flame that will come out of your exhaust when you back fire
Remember that you need a new turbo heat sheild when upgrading to a 3 inch dp!!
I however left mine w/ no shielf which can cause heat soak in your engine bay.
When installing the dp I found it easier to remove the intercooler so i could remove the dp bolts. It really isnt that hard to remove and its only about 4 bolts. Remember to put wd40 on the stock dp bolts before you try to take off the stock dp it will help a lot!! i forgot to do that and man was it hell!!
to take off those bolts..... other then that a dp install is super easy!! anybody can do it there are just a couple bolts...remember to use new gaskets.
heres a pic of the turbo and dp
OK so about the performance when i first got my car i wasnt launching it on the drag strip so my first time was 18.4
but my alttitude is really high so my car is slower but not that much!! lol i simply got that time because i passed the stage light and put it in reverse and before i knew it it was green lol. But after that i got a 14.018 at 97.06mph, with a 60 foot time of 2.068 still slow and not good but im still learning and remember where i live is way way way above sea level so my car is quite a bit slower here.
Anyways for the stage 2 w/ ACT 13lbs flywheel and street clutch
(i was launching) I reached sti performance in a straight line
I got my car my car to beat a stage 2 sti w/ alcohol!! He had all the same modds as me except for the flywheel but he had alcohol so i thought it was fair.
SO this is when i found out its possible i a wrx can be built to beat a sti!!......anyways me and my friend with a 240(sr20) got a best time of 13.77 my trap speed was 98.25, and the 60 foot was 1.9 so there is still room for improvement on times w/ driving practice.
heres a quick vid
a little launch looking at the speed on my ap w/ a shift light( i dont have it set at the right rpm so its going off alot)
Ok so i never mentioned i got a ACT 13 pound plywheel and super street clutch. Well i did right before those stage 2 runs... all i have to say is that flywheel is one of the best things i got for my car!! it allows the rpm to raise faster which kinda means a faster spool its like getting light weight pullies just where your tranny and engine meet. Oh and the flywheel is not light enough to make a check engine light (cel)come on so thats a plus if you go w/ an 11lbs i think it throws a cel just so you know. And about the clutch it feels really good and it seems to hold up after launches. if you plan on getting a light flywheel be prepared to hear some driveterrain chatters especially while it breaks in after that you dont hear it has much but their will definatly be those times...
OK now for some drap tips i can give hopefully you can leave me some cause i deffintly need some... ok well before i start revving to launch i let my clutch out right to where it berly holds i get let it out slowly until my car starts to move then quickly puch it in and hold it at about a tad in from where i felt the car start to move and i start to revv and launch(slip out the clutch) from there.becareful not to pop the clutch it cause major driveterrian shock and usually leads to blown trannies its better to waste the clutch then the tranny unless u have cash to throw away... another tip i have is to start to let the clutch out at the last yellow light before the green to get good 60 foot times
feel free to add to my tips to help us learn!!