gearbox

littlefeller · Post by **littlefeller** » Sun Jan 29, 2012 8:15 pm

its only possible to do this if you slip your clutch, gear mathamatics dont lie

Edd · Post by **Edd** » Sun Jan 29, 2012 8:19 pm

I understand what your saying but defiantly between 2nd and third it stays in vtec. I think it has on all my previous preludes also. 1st and 2nd though, your right, I don't slip the clutch I spin the wheels slightly.
What rpm did your spreadsheet change at? I personally change right at the top 8k just before I bounce off the limiter

littlefeller · Post by **littlefeller** » Sun Jan 29, 2012 8:24 pm

no my spread sheet changed at 7250 rpm, i thought the std rev limiter was 7500rpm? looks like i need to go over them again and recalculate

i have never gone over 7000rpm

always been woried to

A1ex · Post by **A1ex** » Sun Jan 29, 2012 8:35 pm

My auto would only drop out between 3rd & 4th. I'm sure 3rd tops out at 112mph for the best performance in Japan.

mercutio · Post by **mercutio** » Sun Jan 29, 2012 9:24 pm

There was a guy on Puk a few years ago who was looking into building a flappy paddle arrangement for the lude he moved to australia this was where he was starting the project but i didnt hear from him after that and i cant remember his tag might be worth logging onto preludeaustralia see if he is posting on there

Post by **Ammo** » Sun Jan 29, 2012 9:39 pm

skinnyboy or something like that his user was

littlefeller · Post by **littlefeller** » Sun Jan 29, 2012 9:59 pm

yes your right it is around 112 in 3rd or maybe slightly lower, but mine drops out of vtec between 1,2,3 and 4, but in the lower gears its so close that you dont notice it, but if you watch the tacho you can see that it actually does. as for the flappy paddles, its fairly simple, was more intrested as to what controll the ecu has over the auto box, if not that much then im buggered and need to go back to the manual conversion, would be a shame as mathamaticaly it would be great

but then if ecu hasnt much control then how does the sport mode work

supose i could just look and see what parts in the auto box are wired, that would give me an idea of how much control i would have

A1ex · Post by **A1ex** » Sun Jan 29, 2012 10:05 pm

If you get a VAFC from ebay you can see if the box is definately dropping out of vtec, and if it is, lower the vtec change over

Installed one in my old lude, use plenty of heat shrink and solder, double and triple check the instructions before cutting and it's all fine. Then read the instructions PROPERLY before turning the car on and everything is fine, you can adjust the vtec pretty easily in it.

littlefeller · Post by **littlefeller** » Mon Jan 30, 2012 8:59 am

dont really like these controllers, if vtec is changed doesnt the fuel air ratio and or ignition timing also need to be changed or can all of the above be done with this gizmo?

A1ex · Post by **A1ex** » Mon Jan 30, 2012 11:00 am

Engaging the vtec switches everything to the vtec map anyway (I think) the only thing you can adjust if the A/F mixture with the VAFC