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on my 347 we went 8.18 @ 3350 lbs on 325 BFG's
 

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Actually an NMRA car has gone 8.0's with an 85mm and an 88mm in competition, no 7's yet. Johnny K went a high 7.90 at Milan with an 88mm at 3250ish on a test pass.

I would think a 91mm at that weight should be good for 7.80's or so. I have been an 8.26 at 173 with an 88mm at 3420 with a MT 325 if that matters.
 

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These low 8 second 88mm combos, how much boost, 28/29?

Boost is relative to how efficient the motor is. That airflow may make 30 lbs on your combo, but only 15 lbs on a more efficient combo. Boost is just a number, doesnt really mean much.
 

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Kelly's Nightmare
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Discussion Starter · #13 ·
Boost is relative to how efficient the motor is. That airflow may make 30 lbs on your combo, but only 15 lbs on a more efficient combo. Boost is just a number, doesnt really mean much.

I think they are asking due to the PR efficiency's of the turbo.
 
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