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Old 02-01-2009, 04:20 PM   #11
Focus112
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i want to do this bad, but seems like alot could go wrong. Good read though +rep
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Old 02-01-2009, 04:24 PM   #12
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awesome write up tom.
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Old 02-01-2009, 04:24 PM   #13
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Talking

Quote:
Originally Posted by illinipo View Post
you do realize youre running lean with that bigger maf housing right? not really a good idea.


but your throttle plate idea is a good one. great writeup with great pics
Not if I have corrected the MAF transfer table using the SCT Pro-Racer SW

Check out my Dyno pull on the Dyno thread......

Quote:
Originally Posted by tb1999 View Post
Not if I have corrected the MAF transfer table using the SCT Pro-Racer SW

Check out my Dyno pull on the Dyno thread......
or this video works for me too.....

http://www.youtube.com/view_play_lis...090970A8F44221

Quote:
Originally Posted by honhon View Post
awesome write up tom.
Yeah, thanks.

It was a real PITA working in MS Paint to do the graphics, I WANT PHOTOSHOP! LOL
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213 whp / 160 wtq D23 NA with stock intake and TB.

Inventor of "The $0 Thunder Throttle" & "Focuzdax-7" brake swap.
I like the same qualities in women and pistons; Lightweight, fast, and with the smallest skirts possible...

Last edited by Lil_RedZX3; 02-14-2009 at 11:53 PM.
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Old 02-01-2009, 04:33 PM   #14
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Quote:
Originally Posted by tb1999 View Post
Not if I have corrected the MAF transfer table using the SCT Pro-Racer SW

Check out my Dyno pull on the Dyno thread......
ah total win

good job then lol

sorry, bigger maf tube is a usually a huge ricer mod
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Old 02-01-2009, 04:36 PM   #15
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Quote:
Originally Posted by Focus112 View Post
i want to do this bad, but seems like alot could go wrong. Good read though +rep
Thanks for the rep, and if you want a second opinion on how hard/easy it is to do this work, PM warneej, he was my first guinea pig.

I put all the doom and gloom into the instructions so I don't have to take slack from people that get in over thier head.

It can be done with some patience, but if you are really not skilled doing this kind of work it might not be for you.

(But don't worry, I'm willing to bet there will be a few "used" 65 & 67 MM throttle bodies going up for sale in the near future.)



Quote:
Originally Posted by illinipo View Post
ah total win

good job then lol

sorry, bigger maf tube is a usually a huge ricer mod
I started with a 3" MAF tube,(a stock part from 1/2 0f an Aston Marton V8 Vantage Intake, they use Ford PTEC ECM, and the same exact MAF sensor as the Duratec)

The car ran great over 2500 RPM, but since it creates problems for getting an accurate AF ratio at idle and low RPM even using the SCT pro racer SW, it was just way too big for a NA D23. I had to find a compromise, the 2.75" /70MM unit seems to be OK.
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213 whp / 160 wtq D23 NA with stock intake and TB.

Inventor of "The $0 Thunder Throttle" & "Focuzdax-7" brake swap.
I like the same qualities in women and pistons; Lightweight, fast, and with the smallest skirts possible...

Last edited by Lil_RedZX3; 02-14-2009 at 11:54 PM.
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Old 02-01-2009, 06:02 PM   #16
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excellent write-up Tom!

I made a discovery today, when dealing with this on my Cosworth IM i've always had a slight problem of hanging revs and whatnot and my car has always been really loud. While thinking back on the TB install process today at work I decided to try something:

I disconnected my Idle Air Control Valve (IAC) and started the car. After adjusting the idle with the set screw I took it for a drive.

Instantly I noticed that my car ran like a champ. It idled up, revved, drove, and idled down better then ever. Maybe even better then stock. It is also MUCH quieter, that was probably the most noticeable part. But best of all, NO HANGING REVS!

I have since been driving all day with no issues, my AFR reads perfectly normal. I am going to call TurboTom later in the week and get him to update my tune to delete the IAC valve.

Again thanks for your excellent work as of late, you are a real asset to this forum
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Old 02-01-2009, 06:21 PM   #17
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Jeez. This might seriously be a project for a nice warm summer weekend. Very nice.
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Old 02-01-2009, 06:29 PM   #18
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Quote:
Originally Posted by warneej View Post
excellent write-up Tom!

I made a discovery today, when dealing with this on my Cosworth IM i've always had a slight problem of hanging revs and whatnot and my car has always been really loud. While thinking back on the TB install process today at work I decided to try something:

I disconnected my Idle Air Control Valve (IAC) and started the car. After adjusting the idle with the set screw I took it for a drive.

Instantly I noticed that my car ran like a champ. It idled up, revved, drove, and idled down better then ever. Maybe even better then stock. It is also MUCH quieter, that was probably the most noticeable part. But best of all, NO HANGING REVS!

I have since been driving all day with no issues, my AFR reads perfectly normal. I am going to call TurboTom later in the week and get him to update my tune to delete the IAC valve.

Again thanks for your excellent work as of late, you are a real asset to this forum
I would not do that, the IAC is needed for several key points in the calibration strategy.

It's needed for warm-up, and to keep from stalling when shifting etc. Especially during cold starts etc.

IF you set the RPM to 550 with engine fully warm & IAC disconnected, as I instructed everything should be fine after the throttle relearns it's IAC adaptives etc.

IF the throttle seems to hang, there are throttle dashpot curves and preposition settings Tom should be able to adjust for you, but you can't really run the car without an IAC.

Keep in mind, that the throttle stop screw on a computer controlled fuel injected car is just a base idle air setting for the ECM to work off of, and all idle control is done by the ECM and the IAC.

The min RPM setting is required to keep the IAC in correct range, and allow a driver to "limp home" if the IAC fails.
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213 whp / 160 wtq D23 NA with stock intake and TB.

Inventor of "The $0 Thunder Throttle" & "Focuzdax-7" brake swap.
I like the same qualities in women and pistons; Lightweight, fast, and with the smallest skirts possible...

Last edited by tb1999; 02-01-2009 at 06:33 PM. Reason: extra detail
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Old 02-01-2009, 08:29 PM   #19
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Just bought a spare TB from honhon so I will give this a shot as soon as I get it.
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Old 02-01-2009, 09:38 PM   #20
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i find that the car runs much better without it. Keep in mind my other modifications. Now it revs down between shifts and doesn't stall at idle. It also still idles at my programmed 850rpm idle without it.

Seems like it runs like a normal car now...
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