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If I install a 3.9 diff in my 280zxt 5-spd, will it be faster in the qt mile?


Thumper

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Yes apologies for hijacking the thread..

 

Drax, the flange is made of two 1/4" laser cut peices. The reason being we wanted it 1/2" think but the laser cuts are not as good on 1/2 SS (I guess SS is shiny and the laser bounces around alot) We've done water-jet cutting too, but that's alot more expensive. I know you have alot more technical knowlege about the physics of this. All I know is what I "think" would flow better, you may be right about the turbulence at the diffuser but then again I can tell you that I noticed a HUGE difference in the lag. Now it is practially non-existant! On a further note, I'm sure the 2.5" pipe works very well and it is likely not worth swapping to 3" However if you don't have a DP and are building one, my advise would be go to the 3" right off the bat.

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