Thread: speed booster a must read
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Old Apr 16, 2009 | 09:02 PM
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BrianBrave
<--- Huge Horsepower
Joined: Apr 2007
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From: So Cal
Default Re: speed booster a must read
Originally Posted by kurtisberry
So I have read the white paper and the SB is nothing more than a linear amplifier with 1.428 gain. There is no nonlinear part of the equation. It produces a signal of 100% throttle to the ECU at 70% throttle position. 100/70 = 1.428. There is no change above 70% throttle position.

I spent a few minutes this morning and designed my version of the SB. When I have a chance (trout season opens this weekend), I will build, install, test and post drawing, pictures and instructions, if it works or doesn't.

I haven't looked into sourcing the connectors, so I will probably hard wire the prototype. If any one has info on the connectors, I would appreciate any help. With the connectors I could build a nice plug in unit like the SB.

I chose a fairly expensive dual op-amp ($7) so I'm looking at around $12 in parts without connectors.

Kurt
You might be able to cheaply integrate your prototype into the actual foot pedal assembly without the need for connectors. It's easy to remove and not to expensive to replace.

I would humbly suggest that you use two op amps in your design. That way if one IC or circuit failed, the other circuit would still supply the ECU with a throttle position signal. The SB is a single-point-of-failure device.

Also, if you can vary the gain with a three position resistor or a variable resistor - that would be sweet. Say 1.2, 1.35 and 1.5.

Good luck...
 
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