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VTEC Controller for OBD2

 
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Old 06-05-2008, 07:04 AM
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VTEC Controller for OBD2

im on the look out for a VTEC controller for my type s does anyone know of one that fits or works well, ive looked at spoon but they only do OBD1 so it seems

idealy id like a plug and play system like the spoon ones so i can take it out easilly if needed

Jim
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Old 06-05-2008, 11:13 PM
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Well there's VTEC controllers and their piggybacks.

A VTEC controller such as the buddyclub v-con only enables you to change the VTEC crossover point. Howerver they don't alter the fuel/ignition maps to match the new crossover point, so if you change the crossover point to 4k for argument's sake, you will get onto the high cam at 4k, and have the high cam fuel/ignition maps engage at 5.2k. Also factor in that for a stock engine the crossover point is at the optimal point.

My reccomendation would be the likes of an APexi VAFC or Neo. Either of these allow you to tune the engine's fuel/ignition maps, by essentially tricking the factory ECU. Neo is probably the better of the two, as it give a few more adjustment points (22 vs 28 points or something like that). Then get it tuned on a dyno. A good tuner will do one run with the high cam engagement point set at about 200RPM, then another run with it set at 7900RPM. Where the two torque curves cross is where the cam changeover point should be.
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Old 06-07-2008, 10:05 AM
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I love this site, I learn something new everyday. So V tec controllers aren't really neccessary unless you have done some performance upgrades like valvetrain? So if stock its already at the optimal point at like 5200 rpm?
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Old 06-07-2008, 06:56 PM
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Quote:
Originally Posted by Rob View Post
I love this site, I learn something new everyday. So V tec controllers aren't really neccessary unless you have done some performance upgrades like valvetrain? So if stock its already at the optimal point at like 5200 rpm?

there's a lot of factors with vtec. I'm only going to focus on your last one question cause it will also answer your first question. As far as how the H22 is design yes it is in the optimal place because of a couple of veriables. The main variable being oil pressure. You need to have a substancial amount of oil pressure before "vtekking." As far as making power? No it's not in the best spot. I've seen countless stock h22 dyno sheets time after time with a little dip right before vtec is engaged and there are some little ponies that could be gained in that rpm range (roughly 500rpms range).
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Old 06-08-2008, 05:03 AM
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thanks for your comments

basically the CRX SiR has the same 5200 cross over but i moved it 2 4800 and found 0.3 seconds on the 1/4 mile went from 14.8 to 14.5 i was hoping something simular would benifit my Type S as im at 15.1 at the mo lol but that was standard done a bit to it since. the other option is to get a conversion harness so i can run an OBD1 ecu and fit the spoon VTEC controller unit.

Jim
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Old 06-09-2008, 01:14 AM
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I am probably gonna pull my VAFC pretty soon if you would be interested.
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