T5 Throttle Machining 70mm - The Saab Link Forums

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Performance Modifications for the NG900 / Old 9-3 This forum contains PERFORMANCE related Q&A's for the NG900 and 9-3. This may also include suspension.

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Old 07-28-2009, 06:17 PM   #1
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T5 Throttle Machining 70mm

"Custom throttle body overbore from 65mm (3318sq mm) to 70mm (3848 sq mm) Roughly 16% more throttle area. Should be combined with 3in throttle bend and larger delivery pipe on high output cars."

From Genuine Saab. Is this something worth considering if you are stae 4 and have all of the hardware?
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Old 07-28-2009, 08:57 PM   #2
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Last time I talked to Nick T about it, they dont do it anymore. From what he said, it didnt make any appreciable differences. I dont think there will be any difference at all, especially not for stage 4.

I thought the machining was only done to match the bigger 2.5" delivery pipe and throttle body inlet.
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Old 07-29-2009, 06:07 AM   #3
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Thanks.
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Old 07-29-2009, 06:34 AM   #4
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On a stage 4 car the throttle is not a "major" problem. On the 2.3i and very high output cars it is different.
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2.0 GOOSE 500whp + 8500rpm = 11.06 @125 E85
Viggen 439whp / 447tq 12.43 @114 on Gt2871.64, (Now 511whp Gt3076)
Nordic E85 9-3 SS Aero 320hp / 350ftlbs
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Old 07-29-2009, 06:42 AM   #5
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Roger.
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Old 07-29-2009, 07:10 AM   #6
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Quote:
Originally Posted by GenuineSaab View Post
On a stage 4 car the throttle is not a "major" problem. On the 2.3i and very high output cars it is different.
At what point would you say it would begin to make a difference? Also, would the current tune need to be tweeked to account for the larger TB?
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Old 07-29-2009, 07:42 AM   #7
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At what point would you say it would begin to make a difference? Also, would the current tune need to be tweeked to account for the larger TB?
when you had a larger motor than a 2.3 4-banger.

guys run twin-turbo LS1 motors through 3" intercooler / intake piping. You'd have to have a turbo the size of a 5-gallon bucket and rev to 20krpm to push enough air out of a 2.3 to "clog up" the factory throttle body.
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Old 07-29-2009, 09:31 AM   #8
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Guess that answers that question. Maybe I'll spend the money getting my car detailed instead.
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Old 07-29-2009, 09:41 AM   #9
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Twin-turbo LS1 in a 1992 Typhoon with twin Borg Warner T04's and a 78mm FAST throttle body. If you can force dual-screws, being spun by a 350, through a 78mm body with ease, then we've got nothing to worry about. Ever.



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Old 07-29-2009, 09:45 AM   #10
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That looks great. Do you have a pic of the whole car?
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Old 07-29-2009, 10:03 AM   #11
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only one crappy one where its still half torn apart. This is not my vehicle, unfortunately.

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Old 07-29-2009, 10:48 AM   #12
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only one crappy one where its still half torn apart. This is not my vehicle, unfortunately.

Now, tell me that thing has a T-56 in place of the automatic and it is AMAZING.
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Old 07-29-2009, 11:17 AM   #13
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700R4 is long gone; its got a built 4L80E. T56 is a tough tranny for a truck like that. There are only 2 or 3 Syclone / Typhoons out there running manual trannies. I'm not 100% sure why that is, but it seems to generally worsen the driving experience in most opinions.

There is one truck I know of that runs a T56, but he's also running an Eaton supercharger, in addition to a single turbo.

AWD
6-speed
turbocharged
supercharged

...............weird. and pretty ugly, but apparently its fast as hell.
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