Upgrading to bigger throttle body - it works for me - Alfa Romeo Forum
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(Post Link) post #1 of 4 Old 18-03-18 Thread Starter
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Upgrading to bigger throttle body - flow difference

Following info is just for your information, and it's only my experience shared.
Bought bigger TB from Porsche - 78mm wide.
Original one is 72.
My engine was dynoed with OE throttle and 2.5-3.0V6 MAF (last 3 digit Bosch part number 531) and it shows 704 kg/h air flow......
Fitted the wider TB and do 2 runs with similar results - 734 and 737 kg/h flow.
And i can feel the difference - response is much sharper however i can't confirm that BHP goes up.
Maybe worth to note that same custom made intake manifold was used.
Straight swap(adaptor needed) and TB can be found for 40 - 80 pounds on eBay.....
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Rear Wheel Drive Mid - Engined Alfa 156 3.0 V6 '99 - trackday car
Alfa 156 2.0 TS '00 - daily car

Fiat Coupe 20VTurbo, GT2860RS,
water-meth injection 120cc, custom manifold, 3" Downpipe, FMIC - entertainment car

Last edited by Speedmaster; 19-03-18 at 21:31.
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Anyone an suggestions as to a possible bigger throttle body for a 2.0 TS ?
Thanks
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(Post Link) post #3 of 4 Old 05-07-18 Thread Starter
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Quote:
Originally Posted by yeroulfella View Post
Anyone an suggestions as to a possible bigger throttle body for a 2.0 TS ?
Thanks
I doubt that it will have same effect as on V6 with supporting mods.....
BTW now i have even bigger 82mm TB from Boxter and it will be tested tomorrow to see if it show some difference in air quantity.....
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Quote:
Originally Posted by yeroulfella View Post
Anyone an suggestions as to a possible bigger throttle body for a 2.0 TS ?
Thanks
A good thread about that:
https://www.alfaowner.com/Forum/alfa...-to-2-0-a.html (Gta throttle body to 2.0)
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