TPI Tuned Port Injection discussion and questions. LB9 and L98 tech, porting, tuning, and bolt-on aftermarket products.
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TPI base

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Old 01-04-2009, 02:40 PM
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TPI base

how good(or bad) does a stock tpi base flow? I did a search and all I got was classifieds. does anyone know of a good writeup on porting one?
Old 01-04-2009, 06:43 PM
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Re: TPI base

http://sethirdgen.org/TPIbase.htm
well there's a right up
https://www.thirdgen.org/siameseport

From what I understand it's best done when you port the runners and plenum too.
Old 01-04-2009, 07:07 PM
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Car: 85 2M6, 87 'Bird 88 'burb
Engine: LX9, LG4, L05
Transmission: F23, 700r4, 700R4
Axle/Gears: 3.63, 2.73, 4.10
Re: TPI base

thanks
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