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Flat-shifting

Old 09-06-06, 05:55 PM
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Flat-shifting

haven't really ever looked into this very much.......but now that i work at a shop that deals with alot of subaru's i've noticed that more and more of them are running AEM standalones with the flat shifting option set up. does anyone on here use somthing similar for drag racing? i'd think with our larger turbo's it could probably make a decent difference in E.T time. and lastly, is there anything "bad" about doing somthing like this? the systems they are using cuts spark
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Old 09-06-06, 06:49 PM
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i flat shift using my msd rev limiter. it cuts the spark at 6800rpms and i never lift my foot off until i'm done. this is in my v8 rx7. it's very very hard on the drivetrain, but makes a noticable difference in my times.
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Old 09-06-06, 07:33 PM
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Originally Posted by No_Rotor_RX7
i flat shift using my msd rev limiter. it cuts the spark at 6800rpms and i never lift my foot off until i'm done. this is in my v8 rx7. it's very very hard on the drivetrain, but makes a noticable difference in my times.
Using a two-step in this regard is nicer on the drivetrain since it allows the engine speed to fall, and and engine WILL slow down faster with the throttle open vs. closed (try it sometime, shut the engine off at 2k with the throttle wide open, don't try with a carb though unless you want to remove your exhaust system).

It also works nicely as an anti lag device. Really hard on the turbo, though.
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Old 09-13-06, 06:28 PM
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Originally Posted by peejay
It also works nicely as an anti lag device. Really hard on the turbo, though.
Yeah. J-rat grenaded his hybrid with a two-step system.
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