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Old 09-08-2007, 07:46 AM   #1
94503
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Default wondering what diodes can be put in to get the best timing curve and fuel curve

i saw a post on here awhile ago about putting diodes in where the cts is and the ait is but there are certain ones to put in that give you th best timing and fuel curves

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Old 09-08-2007, 09:37 AM   #2
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Default Re: wondering what diodes can be put in to get the best timing curve and fuel curve

Leave it alone. Diodes will only make your car runs worst, not better.

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Old 09-08-2007, 09:56 AM   #3
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Default Re: wondering what diodes can be put in to get the best timing curve and fuel curve

Actually diodes wont do anything. If installed correctly, a diode wont do anything. If installed backwards the car either wont run at all or will run poorly. Its resistors that people use. And all the does is cause the engine to run richer than it already does.

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Last edited by Low Saturn; 09-08-2007 at 10:11 AM..

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Old 09-08-2007, 12:11 PM   #4
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Default Re: wondering what diodes can be put in to get the best timing curve and fuel curve

a correctly installed diode will let the current pass throught it but it will lower the voltage of 1.3V to 1.7V depending on the type of diode used.

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Old 09-08-2007, 12:55 PM   #5
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Default Re: wondering what diodes can be put in to get the best timing curve and fuel curve

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a correctly installed diode will let the current pass throught it but it will lower the voltage of 1.3V to 1.7V depending on the type of diode used.
No it won't. That's the voltage drop across the diode that switches it on, not the voltage it allows through the circuit. A diode is not a voltage limiting device, it is a channeling device.

Anyhoo, as Low Saturn said, it's resistors people use, and they don't fine tune them for fuel maps, they think they are buying "chips" and are just buying resisitors that fool the computer into thinking it is getting super cool air all the time. The benefit is little and the consequences greatly outweigh them. Things like: poor fuel economy, wasted fuel, carbon deposits from unburn fuel and damaged catalytic convertors.

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Old 09-08-2007, 01:08 PM   #6
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Default Re: wondering what diodes can be put in to get the best timing curve and fuel curve

well then those people must never have heard of the "JDM" - style performance chips. an increase of 30 hp is guaranteed!

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Old 09-08-2007, 01:30 PM   #7
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Default Re: wondering what diodes can be put in to get the best timing curve and fuel curve

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well then those people must never have heard of the "JDM" - style performance chips. an increase of 30 hp is guaranteed!
The problem with conversing on the net is you can't hear the cynicsm or sarcasm in a person's typing, such as in the above post.

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Old 09-08-2007, 01:36 PM   #8
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Default Re: wondering what diodes can be put in to get the best timing curve and fuel curve

I'd spend $5 on a potentiometer (sp?) before I spent $5 on a bag of RadioShack resistors or the eGay "chip." Least with the potentiometer I can "change" the "air temp" while in the car.

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Old 09-08-2007, 04:07 PM   #9
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Default Re: wondering what diodes can be put in to get the best timing curve and fuel curve

YAY!!!


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Old 09-08-2007, 05:03 PM   #10
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Default Re: wondering what diodes can be put in to get the best timing curve and fuel curve

^^^ There you go, get the car some pot and it'll run faster

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Old 09-08-2007, 05:13 PM   #11
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Default Re: wondering what diodes can be put in to get the best timing curve and fuel curve

UUUmmmmm pot...brings back the old days. At least what I can remember of them

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Old 09-09-2007, 01:02 PM   #12
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Default Re: wondering what diodes can be put in to get the best timing curve and fuel curve

on top of the marginal effects this mod may have it will only be while the engine temp is cold. once the engine has reached operating temp it switches to closed loop operation. in other words it pretty much ignores most of the sensors and uses predetermined values stored in the PCM. so you are wasting your time with this mod and chances are more likely that you will screw something up than make more power.

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Old 09-09-2007, 01:07 PM   #13
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Default Re: wondering what diodes can be put in to get the best timing curve and fuel curve

Quote:
Originally Posted by sl_don View Post
on top of the marginal effects this mod may have it will only be while the engine temp is cold. once the engine has reached operating temp it switches to closed loop operation. in other words it pretty much ignores most of the sensors and uses predetermined values stored in the PCM. so you are wasting your time with this mod and chances are more likely that you will screw something up than make more power.
Reverse that.

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Old 09-09-2007, 01:33 PM   #14
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Default Re: wondering what diodes can be put in to get the best timing curve and fuel curve

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Reverse that.
That's what I was gonna say..

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Old 09-10-2007, 10:15 PM   #15
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Default Re: wondering what diodes can be put in to get the best timing curve and fuel curve

Did someone say pot? Yes, please. Actually a company Select Sales was selling some pots with an air-fuel meter that you could use to 'tune' the car by messing with the coolant temp sensor signal. There was an article on it in Grassroots Motorsports magazine a few years back. They got some fuel enrichment from it by making the PCM think the engine was cooler.

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Old 09-11-2007, 01:57 AM   #16
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Default Re: wondering what diodes can be put in to get the best timing curve and fuel curve

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Did someone say pot? Yes, please. Actually a company Select Sales was selling some pots with an air-fuel meter that you could use to 'tune' the car by messing with the coolant temp sensor signal. There was an article on it in Grassroots Motorsports magazine a few years back. They got some fuel enrichment from it by making the PCM think the engine was cooler.
There's an article about doing it with a Jeep or something. Same idea. I have the link on my other computer. I'll post it.

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