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DIY $30 Adjustable Boost Cut Eliminator

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Old 01-05-13, 03:03 PM
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ishootstuf
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Default DIY $30 Adjustable Boost Cut Eliminator

I tried searching and I apologize if this is a duplicate post.

I take no credit for this, but I thought I'd spread the word. I built the circuit from the link below and it works great. I'm running 20 PSI on the GTE ECU and the AFR's are great and driveability is awesome. If you want to build and sell them, it only costs an additional $10 for each one because you have to buy a minimum of 10 quantity for some parts. No, I won't build you one.

Build your own FCD

To hook it up TAP into 12v and 5v cut the map signal wire.



Here's the list of parts I bought from jameco.com to do it:



Here's the guts of the project:

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Old 01-05-13, 03:08 PM
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Nice find! Thanks for sharing the info. Subscribed
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Old 01-05-13, 06:02 PM
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That is indeed a good find.
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Old 01-05-13, 07:25 PM
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Wow great find I need one of these
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Old 12-06-13, 09:28 AM
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nice post can't believe I missed this, gotta go make one of these myself now. thanks!
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Old 12-06-13, 09:43 AM
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I literally just researched BCCs and FCDs on here extensively and didn't find this. Even better, this mod works like the Greddy BCC with the clamping circuit. Genius!

Last edited by akora12; 12-06-13 at 10:07 AM.
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Old 12-06-13, 09:50 AM
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Yeah, I was surprised this thread didn't get more activity. You're welcome.
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Old 12-06-13, 10:33 AM
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Yeah I think I had seen a version of it before but I think I am finally motivated to do it and max out these injectors and see what they can do. I like the clamping and it wouldn't be the first time I have arranged some op amps so it might even be fun. thinking about making more than 1 in fact cause you have to order so many parts.
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Old 12-07-13, 11:37 AM
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found a DIY speed cut since the JDM ecu's have a problem with that also.
http://www.alltrac.net/phpBB2/viewtopic.php?t=34001
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Old 12-07-13, 01:11 PM
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Very cool. I wish there were something so easy for the REV limiter.
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Old 12-09-13, 11:59 AM
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Originally Posted by ishootstuf View Post
I built the circuit from the link below and it works great. I'm running 20 PSI on the GTE ECU and the AFR's are great and driveability is awesome.
ishootstuf, what voltage did you set your clamp at? The referenced 3.7V in the tutorial would be a bit low for our application.
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Old 12-09-13, 12:44 PM
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I don't remember for sure, but I think I chose 4.91 volts.

Last edited by ishootstuf; 12-09-13 at 01:01 PM.
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Old 12-09-13, 12:46 PM
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edit** 4.91 is higher than anywhere I read online which says 4.3 or 4.1.
you do want the highest it will go before the cut so that is def good info I would have prob tried 4.3 at first but now will try 4.9 and back it off if it hits the cut.
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Old 12-09-13, 12:51 PM
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It looks like the soarer guys are clamping at 4.3V or a bit less, which is good info for the 1JZ guys like me.

http://www.soarerworld.com/forum/sho...6-Homemade-FCD
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Old 12-09-13, 02:42 PM
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Those lower numbers are probably right. It's been almost a year and my memory sux.
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