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Old 01-11-2002, 07:09 PM   #1
kupaq
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Default Throttle body porting?

Has anybody tried this mod yet? Results?
I am planning on taking mine out and putting it on a lathe....
I'll let you guys know how it goes at the meet.
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Old 01-11-2002, 09:04 PM   #2
KapaFool
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Thumbs up

We were gonna try that a few days ago when I had my intercooler off but we chickened out.
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Old 01-12-2002, 12:31 PM   #3
Resbum
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Default Not to sure but...

I'm just getting into this so I'm probably wrong. Doesn't it mess with the computer(the tuning) by porting the TB like that.
I mean The computer is set to register a set volume of air going
through the TB. Doesn't it use the TB diameter in it's computations? Then it determines air/fuel mixture based on
that and the reading from the ox sensor.

I may be totally wrong. This is one of the problems you could encounter doing this on a 5.0L Ford. A very lean condition.

I've always been under the impression that the computer has to be rechipped or programable so that it takes in to account the different TB diameter.
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Old 01-12-2002, 01:35 PM   #4
kupaq
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resbum
you're not really increasing the volume of air, the bore at the throttle body stays the same. you would just be knocking off the leading edge to reduce turbulence.

will
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Old 01-12-2002, 04:10 PM   #5
Resbum
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Thumbs up Gotcha

Kupaq, thanks for the clarification. I misunderstood what you were trying to do.
Since we're on the subject, is my thinking correct about someone "boring out" the TB without taking into account the electronics?
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Old 01-12-2002, 06:11 PM   #6
RawCode
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I thought boring out was increasing the diameter of the TB thereby increasing the air flow...

RawCode
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Old 01-12-2002, 07:15 PM   #7
kupaq
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The way I understand it is that only the MAF sensor is calibrated for the bore that is located at. Increasing the bore there would cause lean conditions, but not at the throttle body...that air is already metered.

will
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Old 01-13-2002, 12:35 AM   #8
Resbum
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Thumbs up Gotcha... again!

Kupaq- You're right. I was confusing the TB with the MAFS. Man, do I have some refreshing to do. Back in the 90's I was going to put a twin turbo 5.0L HO Ford in my '71 240Z(never came up with $4800). I bought several books on fuel injection and turbo charging and was pretty on top of everything. I guess you lose a lot when you don't use knowledge gained for seven years. Time to dust off those books and do some more reading. Thanks, Resbum
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Old 01-13-2002, 03:58 AM   #9
KapaFool
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Angry

Enough of this useless bantering!! Start the Porting and report your findings!
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Old 01-13-2002, 12:15 PM   #10
RawCode
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Port! Port! Port!

Done yet?

RawCode
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Old 01-13-2002, 01:23 PM   #11
kupaq
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nope not yet.....Im still at work
I'll be home next monday. And I will try my darndest to get it done before the meet.

will
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Old 01-14-2002, 03:14 AM   #12
WRXnFX
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Resbum - Here is the link to the mod. You can read all about it.

http://www.i-club.com/forums/showthr...e+body+porting

Tell us your results. I'm ready to try this too. Winslow
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Old 01-14-2002, 10:39 AM   #13
Resbum
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Thanks Winslow, I'll go there as soon as I post this note.
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Old 01-15-2002, 04:56 AM   #14
Resbum
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Default Looks like "free power" to me

Winslow -that's a great thread you sent me to. By the time you weed through it, they've answered most ?'s. If I had my car now, I'd be out in the garage starting that mod over my morning coffee tomorrow AM. I don't have experience with forced induction but I've always port matched and "cleaned up" my intakes with Dremel tools. I've never been disappointed with the results. I would imagine that it's even more important with forced induction.
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Old 01-15-2002, 06:21 AM   #15
WRXnFX
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If you ever get over to Kris' house, then you could do a detailed inspection under the hood. You'll find many pieces that are restrictive such as the turbo inlet hose, intercooler hoses, intake, and exhaust. I guess, that is with most designs from auto manufacturers. I'm hoping to do that to my car when I get some free time. Winslow
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Old 01-15-2002, 02:50 PM   #16
Resbum
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Default Wrrrrrrrrrrrrrrrr.....

...that's the sound of my Dremel ready to do some "clean-up"!!!

One of the parts that has caught my eye is XS Engineerings "Power Intake". In the Jan 02 ,"Turbo and High-tech" magazine, on pg 42, they have the dyno results. 13.9hp gain, 300rpm lower(5684rpm) and 10.9lbs-ft torque gain, same rpm(4126rpm). It's only $185. It also made another mags list of the top ten products for 2001, but I can't remember which.

I can't remember where I read it, but the K&N air filter is good for about another 10 ponies. For approximately $225 and some time to "clean up" restrictions to air flow the results would probably be outstanding.
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Old 01-15-2002, 05:39 PM   #17
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i'll bring my dremel to the meeting and maybe resbum can do some "cleaning" to my car! every little bit helps!
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Old 01-15-2002, 10:06 PM   #18
KapaFool
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Kris you suck and you too Winslow!! I told you guys that before but no you guys had to make excuses. The intercooler was off the car.
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Old 01-16-2002, 02:54 PM   #19
WRXnFX
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Kapafool: Hey, it's not that I didn't want to do it! It was the amount of time it would take to do it correctly.

Resbum: The XS engineering intake is a really nice setup. The MRT CAI intake system has similar performance gains and uses a K&N intake. I believe that most of the performance gains in a CAI system come from the type of filter used.

WHTDVL wants to do this tonight if you have some time. Winslow
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Old 01-16-2002, 05:29 PM   #20
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i wanna watch and see...

(5 words)
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Old 01-16-2002, 11:33 PM   #21
KapaFool
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Cool

I gots a tool that might work!


Seriously I do, I was asking around at work on porting throttle bodies and somebody suggested to go to Napa and buy this thing.
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Old 01-16-2002, 11:44 PM   #22
whtdvl
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I'm going to hack mine to bits tomorrow if anyone wants to join me.
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Old 01-17-2002, 06:29 AM   #23
WRXnFX
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Eric, I want to see the tool. I was thinking of a good way to do it with a router but if this tool will work then I'm down. We'll practice on Ben's car. Winslow
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Old 01-18-2002, 02:04 AM   #24
Resbum
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Default My place- this weekend- bring car

Eric & Winslow
Do you want to try it this weekend. I've got the garage(small), tools and a whole pack of Bratwurst that needs to be BBQ'd. More importantly the boss says she doesn't care. We do have something planned for Friday night and want to go X-country skiing at some point but not much else planned. Let me know.
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Old 01-18-2002, 02:30 AM   #25
KapaFool
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Thumbs up

I will be at the Beer and Barley Festival at the Egan with Holmes on Friday evening. We have a designated driver to drop us off and pick us up. Any takers to this, oh I almost forgot but it costs $25 to get in, but theres lots of beer to taste.

Resbum - that sounds good for the BBQ and mods, I am free all day Saturday and all day Monday. I don't know about Winslow and Ben though.
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