Change dashpot settings to drop rpm's faster

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w.neurauter

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Apr 25, 2005

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#1

• Feb 24, 2006

• #1

I was wondering if any of you have been able to succesfully change the dashpot settings in the computer to make the revs drop quicker. I have done the copper pipe mod but am looking for something with less draw-backs. I tried to get the dealer to do something about it while I was in for the t3650 tsb and they said it was "normal". Any help would be great, thanks.

 

sgarlic

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Apr 21, 2001

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#2

• Feb 24, 2006

• #2

http://forums.stangnet.com/showthread.php?t=541046&highlight=IAC+Restrictor+Plate

 

jstreet0204

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Jun 26, 2003

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Feb 24, 2006

#3

• Feb 24, 2006

• #3

I have mine set lower in the eec. It will require a custom tune to do it though. I don't think the handheld programmers have access to it.

 

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w.neurauter

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#4

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Did you not read where I said that I had done the copper pipe mod already? I am looking for something that will deal with the idle better when the a/c is turned on etc. I think that dealing with it electronically is the better way to do it. Anyone with a custom tune or chip that has had success with this? Thanks

 

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w.neurauter

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#5

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what do you mean eec?

 

jstreet0204

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#6

• Feb 24, 2006

• #6

the eec is the cars computer. To answer your question, it can be changes with a custom tune.

 

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w.neurauter

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#7

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jstreet,

What kind of custom tune? Do you mean a chip or a programmer? Thanks for the reply, I don't have much experience with this. If this is a chip is it just something you tell them when you order it?

 

jstreet0204

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#8

• Feb 24, 2006

• #8

w.neurauter said:

jstreet,

What kind of custom tune? Do you mean a chip or a programmer? Thanks for the reply, I don't have much experience with this. If this is a chip is it just something you tell them when you order it?

Click to expand...

You can get a custom tune with both a chip & programmer. Just tell them you want the daspot adjusted.

 

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w.neurauter

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#9

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• #9

what setting should I recommend them to put it to. Would you say it is better then the copper pipe cap mod as far as when the a/c kicks on and when the engine is cold?

 

jstreet0204

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Feb 24, 2006

#10

• Feb 24, 2006

• #10

It is better, since using the restrictions on the IAC hender its ability to work like it should. I have my daspot delay set to 2. stock I thinks was 5.

 

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w.neurauter

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#11

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So is this something I can change with the predator? sorry to ask so many questions. I am glad that there may be a way to fix this problem the "right" way. If I get a chip which would you recommend, and I would just tell them when I order the chip? Thanks for all of your help.

 

jstreet0204

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Jun 26, 2003

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Feb 24, 2006

#12

• Feb 24, 2006

• #12

I have not heard of the parameter being accessible with the predator, but I would get a chip if you already have one. Just get a custom tune loaded on the predator. I'm not sure the faster dropping revs are worth the price though.

 

sgarlic

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Apr 21, 2001

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#13

• Feb 24, 2006

• #13

w.neurauter said:

Did you not read where I said that I had done the copper pipe mod already? I am looking for something that will deal with the idle better when the a/c is turned on etc.

Click to expand...

If that was directed towards me, then I say, "Did you not read the link I posted?" That's not the copper pipe mod, it's the restrictor plate mod. That's exactly what you need to do it the "right way." The problem is your IAC, which is mechanical, so why think you can cure a mechanical problem electronically?

 

jstreet0204

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#14

• Feb 24, 2006

• #14

sgarlic said:

If that was directed towards me, then I say, "Did you not read the link I posted?" That's not the copper pipe mod, it's the restrictor plate mod. That's exactly what you need to do it the "right way." The problem is your IAC, which is mechanical, so why think you can cure a mechanical problem electronically?

Click to expand...

The copper pipe mod and the restrictor plate do the same thing. Restrict the IAC's ability to flow air past the throttle body. The IAC is a mechanical part, but it is contolled electronically by the EEC. This is what the EEC uses to control Idle and is specifically tuned to slow rpm drop. The dashpot settings in the eec can be programmed to fix this correctly without restricting the abilty of the IAC, so that is actually the "right way".

 

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w.neurauter

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#15

• Feb 24, 2006

• #15

Jstreet is correct. If you take off the iac control valve on the GT motor there is only one inlet on the intake manifold, therefore the copper pipe works just the same the restrictor plate. The mach 1 uses a setup where the iac uses both holes which is why there is a need for the restrictor plate to only block airlflow to one hole and not the other. GT owners who buy the plates on eBay are just wasting their money.

 

stangGT97

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Dec 22, 2004

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Feb 24, 2006

#16

• Feb 24, 2006

• #16

bought a restrictor plate for my stang, waste of money imho... car sounded like trash on decel, cold starts the revs dropped so fast that the engine made weird sounds. i may put it back in when the weather warms up

 

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w.neurauter

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#17

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• #17

stangGT97,

Try to enlarge the hole in the plate. I live in Chicago where it has been getting very cold at night and I am not having huge problems. I have a 9/32 hoel drilled. It is jerky when cold but that stops after 5 minutes or so of driving.

 

TrueCustoms

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Aug 25, 2005

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#18

• Feb 25, 2006

• #18

I did the restrictor plate mod and now my car idles high. Like 1200 rpms... , whats wrong?

 

Red35th

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Apr 18, 2003

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Houston, TX

Feb 25, 2006

#19

• Feb 25, 2006

• #19

I believe that my brother doubled his decay rate to drop the RPM's faster. He has a 99 GT with a TwEECer. I was almost positive that he raised it, I'll have to ask. He's the tuning guru of the family.

One of the many reasons why a TwEECer is better than a handheld "tuner."