New timing option

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S13FX
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Joined: Sat Apr 30, 2005 10:59 am
Car: '69 l20b Dimeski :)

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So I came across this on another KA-T webpage which im not going to mention and since the person that originaly made the post doesnt post here I might as well do it. Now I hope he doesnt mind but Im going to copy and paste his post. And the more I find out about this little Gizmo I will update you guys. Right now all I know is everything you see in this post.

Quote »Just got off the phone with the guy who makes these-http://www.xpinnovation.net/products.htmlRight now their using them on Mustangs with good success.Basically under boost it will take over the timing giving you what ever you set it at.This will totally stop ANY unwanted timing increases or decreases by the ECU.You set your timing under boost with a timing light, simple as that. It will still run and drive 100% stock.

Also it has a programmable 2 step function as well[/quote]

Quote »This allows you to set one timing deg. after a certain boost reading, so it is tune-able.A BTM or E-manage would just allow further timing vs. boost (BTM) or timing vs boost vs RPM (E-manage).

If the engine does knock, timing will say the same so you really need to watch knock with something like the TXS Knocklite IMO. No worse than most rom tunes where the knock map is defeated.[/quote]Quote »You could lock 20* timing for everything about say 4psi or you could lock 21, 22, 23, etc.That would be the a basic timing setup. You can also lock it at say 27* and tune a BTM to give you 21* @ 12psi.[/quote]


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Neejay
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I tried to find that thread again over "there", but I couldn't.

It sounds confusing...what advantage does it have over the newer BTM? Or is it supposed to be used in conjunction with it?

S13FX
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Joined: Sat Apr 30, 2005 10:59 am
Car: '69 l20b Dimeski :)

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Ok so I dug up some more information. Now if I am wrong on something please feel free to correct me.

For those of you that don’t know how timing works its basically like this. Your ECU advances timing as it sees load. So let’s say that 23degrees of timing for 8psi is ideal timing, but on a NA car it takes it all the way to around 40 I believe. So with this thing you even eliminate the need for a BTM.

So from what I have found out so far, with this thing once it’s hooked up you set it up to lock the timing at 23 by using timing light. Then the TimingLock can be activated with a boost pressure switch (like a hobs switch along with a relay, or a toggle switch), so you probably would want it to activate let say at like 4psi. And then have it lock the timing at the correct spot for your desired boost.

Now I guess it would be a good to maybe have someone make us a chart oh how much max timing you can run at certain amounts of boost.

And like I stated above if someone has any corrections please feel free. This is all for learning. Also note something like a knock detection device is almost a must with this. But this thing will allow you to tune a car with Just a simple SAFC/WB02/Knock light.

Now I am still getting information on this thing. But so from everything I’m learning it looks promising

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S13FX
Posts: 1892
Joined: Sat Apr 30, 2005 10:59 am
Car: '69 l20b Dimeski :)

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So more information on this.

Its like I stated before this thing will lock your timing at what ever you set it to be and it will do it at the desired boost level.

I have found out that the KA ecu adds an extra 8* timing on a DE and 12* extra on the E to the base timing for a tottal of 28*. So now you ask how much timing do I run max on what psi well here is a cool little forumla.

Basically I wouldnt start pulling timing untill around 2 or 4 psi. This formula is going to assume that we are pulling timing starting at 2 psi and it's going to be about .75* per psi.

15psi - 2 = 1313 x .75 = 9.75, or -10 degrees.

Realize this that retarding your timing can only go so far with out creating problems, there is a point where you just have to consider running higher octane fuel.

Another thing is that this device eliminates is the whole issue of doing timing maps on a piggy back. With this thing if you tell it to lock timing at 28 psi after you hit 2pounds of boost, you know exacly where and how to pull your timing on your timing map on the piggy back, which eliminates a lot of headaches.

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Neejay
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Bah...I'd buy it and just have someone tell me where to set it. lol. I get what it does, but I don't understand how it works.

Since I don't have experience with timing, I don't understand it enough to do it myself.


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