Iz mog iskustva, najbolja mehanička modifikacija je sportska grana (serijska je tolko restriktivna za poludit), tu je dobro dodat i dobar usis zraka, zatim drugi final drive(s CTR-a EP2 ili još bolje od FN2 -taj je još kraći) i to u kombinaciji s vrhunskim reflashom mora dat odlične rezultate...
Heres my experience of modding of more than 30 cars :
as from the poweracceleration point of view , the most effective mods are :
1. Tunereflash. Engine will be always in vtec mode while accelerating and gearing, even on a stock crippled tranny.
2. Tranny mod for MT users. 2nd gear in this tranny is a complete disaster. First thing to do - swap 2-5 gears for CTR close ratio ones , ep3 , euro-r , fn2 and so on. Second thing - swap FD to ep3 , euro-r , they have 4.7 , stock tranny has 4.3 longer one. We tried fn2 5.06 and found it funny to race but too short for daily driven car, highway rpms is rather high with it on 6th gear and you need to change gears often. Not that simple and cheap mod, require also dash speedo corector but outcome is whopping !
3. Headers and stock cat converter removal ( for lpg cars, they have clean exhaust ) or high flow cat for petrol cars ( petrol fumes smells really bad ) This will net up to 20-22hp on the vtec, also bumps fuel economy.
Heres example of my 4-2-1 one . http://honda.org.ua/...bout105886.html , full stainless steel, laser cut flanges , seamless 2mm tubes, any size of outlet , any flange design and so on, stock flange design by default to set stock cat for smog inspection ( if needed ) This famous Toda header was used as prototype. http://www.toda-raci...i/k24a-cl9.html
4. I dont recommend to waste money on CAI like AEM, Injen and so on but rather mod stock intake box by removing resonator, swap filter for cotton one and isolate fender inner area from underhood to keep intake air as much cold as possible. Other important mod is isolation all intake tract from heatsoaking, i described it above on the first page. It will let your engine breathe more freely, bump respond, power and also fuel efficience.
To make pedal respond even better and bump off the line + low to mid performance i recommend to upgrade throttle body and intake pipe. Their stock size isnt perfect for this engine. Heres a set of parts for this http://honda.org.ua/...bout106019.html
The most complicated mod is tranny , all others are simple bolt ons and any1 can do this in his garage.
Any questions - ask !
Edited by littlebo, 31 October 2013 - 12:08.