b.r.i.a.n.

kpro is a rom editor. it is a modified oem honda ecu. since it is a oem ecu it retains obd2 but also has tuning capabilities. some sensors need to be swapped in order to run the kpro. aem and haltech are standalone ecu's. those ecu's replace the stock ecu altogether.

s2000Junky

No love for the E manage in this crowd I guess. Spending 2k+ is a hard pill to swallow to lower vtec

errie806

Yeah I'm coming from a mkv GTI so a tune was $600 and increased power by 50bhp lol. I guess I'll hold off on engine mods until I can afford. Supercharge.

camuman

that car had a turbo. that tune you bought raised boost

errie806

Yeah duhh I know that. Im just looking into what value there is in tuning this engine but it seems Honda did a great job already from factory. There are n/a engines that can see fairly significant increases through tuning depending on factory settings.

JUSTINTHECOASTIE

Kpro 3 is only around $1500 now!

http://hondata.com/kpro_s2000.html

MrKlean187

I have an N/A 2005 ap2 and had it tuned with an apex-i VAFC-II. This is a plug and play model that has a pnp harness in order to avoid any splicing! It is already professionally tuned for an 05 by one of the top Honda tuners here in Dallas! Im actually thinking about posting it up in the classifieds for sale if you are interested...I paid $275 for the unit plus the harness, and the tune was $250 plus the wait time! LMK if your interested! It has vtec set to 4600...Had it tuned at T1 by Tony. This was the easiest and most cost effective way of tuning NA without a full ecu (+$1000) and able to retain factory ecu...It also passed inspection without any issues!

s2000Junky

^^^ I agree with you there, cost vs benefit of the vafc is hard to beat but it has its short comings like any unit. Ive run a vafc in the past for quite some time, but I hate to burst your bubble and kill one of your selling points, but the tune on that thing is rather void on any other s2000(hell its void on your own car depending on the temp that day)I constantly had to correct the fuel adj on mine just to maintain the same afr which fluctuates with AIT since there is no internal fuel table to automatically compensate for you like on emanage or full ems. The tuning of one of these vafc is so basic and easy anyway though that anyone with a wideband can dial it in on the street for their own car/bolt ons initially, and for maintenance which will need to be done. I would never tell anyone to plug that thing in blind on their car in various states of modification, that's just poor common sense.

errie806

If lowering VTEC is the most I could do there, then I might as well just hold off until I can afford a SC. How much does lowering VTEC harm daily driving mpg?

s2000Junky

If you do it with a VAFC it will hurt you a little bit because that unit only controls it through rpm trigger point, so whether your at WOT or just 20% throttle it will come on for example, so the car will run rich at light throttle if you hit the lower engagement point, that goes for cruising as well. So if you run one, typically have to find a compromise in engagement point to where your not going to hit it in normal shifting or cruising rpm, say 5k. You might pick up more power as low as 4k or more, but then your running into it. The next least expensive option with all the same tuning features as a full standalone EMS is the Greddy E-manage Ultimate. This like other EMS run vtec through multiple sensors so throttle load and or % will engage it, just like the factory Honda system does, so in this case you could run vtec at say 4k rpm, but only above a designated throttle opening of say 50% or more, so any throttle opening under that will not trigger no matter how high you shift or cruise. This is all going to help you maintain your MPG wile getting all the benefits of a lower vtec.