anybody used them?... seen one on ebay thats quite cheap.. buddy club so at least its a good brand name.. what are the advantages and are they worth the money?

 

Use the search on that one

My view - rubbish without a remap.

But use the search.

Did I mention the search?

 

aaaah... found it... thanks.. probably best to save my money for something a little more important then? lol

 

Only use them if you have a fair few mods otherwise you'll get no gains.

Needs to be combinded with at least a tweak to the fueling.

Get it setup on a dyno.

I used a VAFC and it got me a few HP.

 

Thanks Bibbs... interesting.. gonna get it breathing right first... exhaust and filter... then rolling rd.. i know about the VAFC.. something i considered on my CTR but just never got round to... thanks for your help

 

Alot of people think great lower the VTEC engagement point on an N/A s2000 car and it will be great and faster - not really true in "most" circumstances.

The first cam makes good power to begin with and IIRC its only worth dropping the vtec down to about 5500rpm, where you can yield a slight bit of performance increase.

IMO i wouldnt bother.

I dont rate VAFC2, they dont ofter timing adjustment either but i guess there resonably priced. Doesnt the stock ECU learn around them? as the vafc2 alters the MAP sensor data?

 

The ECU will learn around any piggyback where is doesn't adjust the lambda reading (as you are altering the fueling, the lambda will pick this up and adjust).

The wideband Zeitronix I have for example gives a wideband reading, but can put out an altered lambda to put back to the stock ECU.

The VAFC is the cheapest fuel controller on the market, so will have it's limitations (of which there are quite a few), but for NA applications where you want to thin out the mixture, they are fine.

 

In contrast to the greddy EMU which doesnt get 'learned' over by the stock ECU.

I guess for

 

Lambda reading isn't used on WOT or VTEC though.

That's why i'm not convinced on this piggyback / ECU learning issue.

On WOT the ECU uses fixed lookup tables with compensation for throttle pos / intake temp / coolant temp / knock but AFAIK the lambda reading is passive. I'd love to find out for sure but i'd bet nobody in the UK actutally knows for fact.

The PLX in my S/C install also did the w/b to n/b conversion back to the ECU. Very handy.

 

So that Closed-loop IIRC?

mark, you had good success with the Dastek unichip right?

Did it not settle back to the way it was beforehand, after it had learned??