S2000 Under The Hood S2000 Technical and Mechanical discussions.

Can a VAFC be used w/ Comptech SC and ESM

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Old 04-13-2004, 04:55 AM
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Originally posted by Slows2k
Increasing the MAP voltage also moves the timing more advanced
Are you sure increasing map voltage moves timing forward?
I might be wrong but I always thought it's the other way around.


Originally posted by Slows2k
Increasing the MAP voltage also moves the timing more advanced. This still gives you no control adding fuel.
I found that doing so actually decreased my AF from high to a 12-12.5:1 ratio ie fuel was added for such action


I've always though adding MAP voltage retard timing further and add fuel.
This is why I used it on the Vortech SC system.
The vortech supercharger runs well below vtec but quite lean (for my liking) in vtec cam. The VAFC allows a VARIABLE increase in the MAP voltage and add fuels where it's needed. At the same time, it will retard timing a little bit more. This timing retard is no biggy, may be enough to stop detonation, but you need to keep an eye on your oil temp or exhaust temp and make sure it's not too hot.

Well, if increasing map voltage will advance timing as slow s2k mentioned, then the VAFC is prob not safe to use, unless you have really cold plugs. I used a set of Halo. May be they helped in term of detonation but these plugs/lack of checking for tension costed me an engine However, I did not have audible detonation (yes I know hard to hear in vtec engine) or signs of detonation in all of my engine parts on inspection.

WTF is this about my engine failure that you keep on mentioning auss2k?
You cleverly pointed out before that there are many other causes of detonation (which I am as sure as my mechanics + tuner + engine rebuilders that there is none in my engine). Why are you keep on parroting this.
Have you gone STUP!D lately auss2k?


Sorry to use the layman term for you auss2k, as I don't like you to look up some medical dictionary Want to know what was so funny....an IT specialist once tried to teach a doctor psycholgy...god that was a good laugh for me
I tried to test your medical knowledge on the other thread, but I don't think I should use any psychiatric jargon here either. Oh I almost forgot. Just incase you ask again, the question mark at the end means it's a QUESTION


Have you guys check out the microtech system.
It's a stand alone system rather than a piggy back. I don't know the US price but it's sure is a lot better than the emanage.
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Old 04-13-2004, 06:26 AM
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Originally posted by Slows2k
AEM EMS will also require the injectors, and FPR.
Can someone pls explain to me why you need an FPR with the EMS? The more you can dumb it down, the better.

Thx.
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Old 04-13-2004, 02:19 PM
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The FPR is not a "must" have. It does offer you the ability to richen or lean AF across the Rev range. For those that run injectors that are slightly to small, you can increase the static fuel pressure to make them act larger. It's not reccomended to go much over 55psi static fuel pressure.
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Old 04-13-2004, 02:36 PM
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Perry


here you have the map in case you want to run the VAFC


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Old 04-13-2004, 02:48 PM
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[QUOTE]Originally posted by honda9krpm
WTF is this about my engine failure that you keep on mentioning auss2k?
You cleverly pointed out before that there are many other causes of detonation (which I am as sure as my mechanics + tuner + engine rebuilders that there is none in my engine).
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Old 04-13-2004, 05:27 PM
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[QUOTE]Originally posted by AusS2000
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Old 04-13-2004, 05:45 PM
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[QUOTE]Originally posted by honda9krpm
One minute you suggested "micro detonation" or detonation that you cant see and then it's AF ratio.
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Old 04-13-2004, 07:15 PM
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Originally posted by AusS2000 Yours led you to this:

http://s2000.byteserve.com.au/images/h9k.jpg
and what proof have you got to say so?

what goes around comes around
you think I enjoy being nasty to you
reread those thread and see who was the first prick
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Old 04-13-2004, 07:32 PM
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Originally posted by honda9krpm
you think I enjoy being nasty to you
You must, you put quite a bit of effort into it. Certainly more effort than you put into researching your posts.

reread those thread and see who was the first prick
I have.

Look, here's my stand. When someone asks for information I'll do my best to answer as accurately as possible. When you (or anyone else for that matter) posts something totally erroneous and extraneous I will state my opinion on it. If you find that offensive but can't refute it feel free to attack me. I can take it.

But if you'd rather we stick to attacking the ball not the player then I'm up for it. I'll promise to comment on your statements rather than you if you'll give me the same commitment.

Or, I'm happy to let the slanging match continue. I rather enjoy it.
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Old 04-13-2004, 08:55 PM
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You can use a VAFC with the Comptech.

Not all tuning involves adding fuel. True that the SC tends to run lean at the higher RPM's but at low and mid range, sometimes it helps to subtract fuel. With Vortech SC, you can a little bit of fuel (approx 5%) at top RPM.

That said, VAFC is not very good at tuning but it's better than no control. In addition, you have the option to vary your VTEC point -- definate plus with SC.

EMANAGE would be second, but still doesn't give you the flexibility you need.

Best would be AEM but it involves a lot of tuning and you are out of luck when it comes to emissions control and engine diagnostics. You would have to reinstall the stock ECM before having emissions tests. If your car does not communicate via ODB-II, you've just failed.

If you don't plan to increase boost or get larger fuel injectors and cost is a concern, the VAFC could be a good option. It's certianly better than nothing.
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