vtec controller for FD1

[curtis265]

Keep to the R18A1 engine - i'm sure theres another thread for you.

[blasdf]

when driving around today in fd2 i felt a vtec change over in the higher RPM, im sure it was around 6000rpm or just a bit below, and it was very noticeable.
but unfortunately i could only get it to happen 2 times, then it didn't happen again. i take it this is the i- in i-vtec controlling a range of factors before it implements it.
i wonder if it woudl be possible to program the ecu, to ignore all fuel saving features to make a type of vtec controller to say make this change kick in at 5000rpm, with a full open vtec power from 5-6.8k rpm
it wont make more power obviously but the power curve would kick in earlier so should improve acceleration quite a bit.

[curtis265]

FD2's have K20 engines - a masterpiece under the hood. That's a perforance implementation VTEC. If you wanna try it again, just floor it - although i'm not soo sure about this particular K20... (we get a lame K20 in Australia)

[blasdf]

yeah its a K20Z2, which is weak in comparison to the type r versions of the engine, and si specs in the states.
i still have a feeling something is monitoring the kick in of the slight vtec push, because this i had never noticed before and ive floored my car a bit. but i was able to do it 2 times this afternoon. but the 3rd time no luck.
i'll have to test it out, but there was definitely a pick up of power around 6000rpm or so.
if this surge could be kicked in at 5000rpm, that would make the car feel better when revved out for sure.

[curtis265]

I guess it would. I've read a bit here and there about the Hondata reflash, but iuno whether or not it works for the K20Z2.

This will mess up your warranty tho, and cost a lot, and also increase the redline

[aaronng]

I guess it would. I've read a bit here and there about the Hondata reflash, but iuno whether or not it works for the K20Z2.

This will mess up your warranty tho, and cost a lot, and also increase the redline

Won't work since Hondata US made a reflash only for the base RSX, not the Civic. Even that reflash doesn't alter vtec point and doesn't increase the redline.

[Waternmo]

hey guys im in hk right now, spoken to J's Racing guy today and he told me alot bout FD2s. with the FD2r in HK with K20A, vtec point is at 5800rpm and is recommended to set to 5200rpm for street use, no power gain but u'll feel it pulls better coz of vtec engaging earlier. with our FD2 K20z2 in Oz, the vtec point is said to be around 4500rpm, when u slowly accelerate in 2nd gear u'll notice a slight change in sound but the acceleration is still smooth unlike the good old B series.

[curtis265]

^that's not fun is it

"VTEC nudged in yo!"

[curtis265]

Won't work since Hondata US made a reflash only for the base RSX, not the Civic. Even that reflash doesn't alter vtec point and doesn't increase the redline.

I didn't think of looking on their site!
http://www.hondata.com/reflash.html

RSX

* 2002-2004 RSX- Type S K20A2 RSX
* 2002-2004 RSX- Type S K20A2 with ITR Cams
* 2002-2004 Base RSX K20A3 RSX manual
* 2002-2004 Base RSX K20A3 RSX auto
* 2005-2006 RSX Type S K20Z1 RSX Type S

Civic SI

* 2002-2004 Civic Si K20A3 Civic Si
* 2006-2008 Civic Si K20Z3 Civic Si

Civic Type R

* 2007-2008 Japanese FD2
* 2007 European FN2

TSX

* 2004 TSX (manual & auto) K24A2 TSX
* 2005 TSX (manual & auto) K24A2 TSX 2005
* 2006 TSX (manual & auto) K24A2 TSX 2006

RDX

* 2007-2008 RDX K23A1 RDX

S2000

* 2006-2008 S2000 F22C stock
* 2006-2008 S2000 F22C with Toda Header

Jackson Racing Superchargers (available only through Jackson Racing):

* 2002-2004 RSX- Type S Race Upgrade K20A2 RSX Type S JRSC
* 2002-2004 Civic Si Race Upgrade K20A3 Civic Si JRSC

ECU must be sent to Hondata in order to be re-flashed with the updated program. Hondata does not sell direct - all sales and payment must be conducted through Hondata dealers. The upgrade information form must be sent with your ECU.

looks like we've got a lame, unreflashable K20

curious/stupid question: what makes the K20z2 different from the K20z3? can it be easily changed?

[blasdf]

yeah ive searched the net many times and have found nothing much about the k20z2 engine reflash, i beleive because it onyl works on the outflow of vtec, where as the type r engines work in intake and outtake? or vice versa, sorry i know a bit about cars, but hardly anything haha.
the thing that surprises me was my car definitely had a power band transfer yesterday at aroudn 6000rpm. it was almost like i went from half throttle to full throttle, that's what it felt like.
this leads me to believe the cars engine would have some way of havign the vtec system set a more static setup where it always changes at 5000rpm, opposed to using i vtec to change at any rev range depending on circumstances.
i think we just need to put some effort into exploring the engine and may find something.
just a pity that although i work in IT, i'm not a programmer, so I would probably break my car.
in regards to warranty, i'm not worried about that as i write off costs of my vehicle for tax purposes, so really the warranty only covers a few small things that i've already had fixed.

[aaronng]

I didn't think of looking on their site!
http://www.hondata.com/reflash.html



looks like we've got a lame, unreflashable K20

curious/stupid question: what makes the K20z2 different from the K20z3? can it be easily changed?

The K20Z3 is the one used in the DC5 Type S. So you get proper VTEC head and lightweight components in the block, plus your usually high RPM intake manifold and exhaust headers. Also, that runs 95 RON minimum instead of the 91 RON that the K20Z2 requires. If you want to change it, do an engine swap. But you'll have to research on your ECU options.

[blasdf]

hey guys im in hk right now, spoken to J's Racing guy today and he told me alot bout FD2s. with the FD2r in HK with K20A, vtec point is at 5800rpm and is recommended to set to 5200rpm for street use, no power gain but u'll feel it pulls better coz of vtec engaging earlier. with our FD2 K20z2 in Oz, the vtec point is said to be around 4500rpm, when u slowly accelerate in 2nd gear u'll notice a slight change in sound but the acceleration is still smooth unlike the good old B series.

can you find out from them if they no any way the vtec change be changed to engage under full throttle at a slightly higher rpm?
and perhaps explain what i felt in my car yesterday, under heavy acceleration there was definitely a power band pull from 6000rpm up ish, only in 800rpm of revving or so. and funny enough, i was in 2nd gear racing up to 100kph when i noticed this change 2 times.

i honestly think there isnt many products for this engine because places like HK etc, all have the JDM FD2R, so any performance guys get that vehicle.
but yet, there are many people with this type of engine, yet no one has looked into it.
yet i'm pretty sure, if someone properly looked into it, they woudl find something that would alter how it works on the vtec system to make the engine a little more racey.
i realise it is not a type r, but really, it shouldn't be as crippled as others say as it's still a honda engine, and everyone knows they come detuned from the factory always.