so I was reading an article about the new HHR SS - Miata Turbo Forum - Boost cars, acquire cats.

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Old 02-21-2008, 09:55 PM   #1
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Default so I was reading an article about the new HHR SS

and I sall it has flat shifting (they call it zero lift shifting) ability. pretty cool, ive never seen a factory car with that feature.
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Old 02-21-2008, 09:59 PM   #2
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what the **** is zero lift/flat shifting
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Old 02-21-2008, 10:01 PM   #3
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the car lifts for you because of its electronic throttle? whats the difference?
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Old 02-21-2008, 10:02 PM   #4
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Old 02-21-2008, 10:07 PM   #5
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wasn't that fire-breather shifting without the clutch?
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Old 02-21-2008, 10:11 PM   #6
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Yeah the announcer said he only uses the clutch when moving the shifter across the gate, so he's slamming it from 1-2 and 3-4.
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Old 02-21-2008, 10:34 PM   #7
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flat shifting = shifting while haveing the gas pedal floored. The car keeps the engine at a certian rpm when you do this to keep the turbo spooled.

its really flat shifting with anti lag on the HHR SS.
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Old 02-21-2008, 10:38 PM   #8
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Doesnt the engine just cut ignition? thats how it usually works for the drag guys.
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Old 02-21-2008, 11:06 PM   #9
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i assume theyd cut fuel not spark....
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Old 02-21-2008, 11:15 PM   #10
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Quote:
Originally Posted by Braineack View Post
i assume theyd cut fuel not spark....
Wouldnt this be quite dangerous in case of any lingering gas?

edit: looked around a little, at least the UTEC standalone uses ignition cut, not fuel cut.
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Old 02-21-2008, 11:19 PM   #11
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THeres no gas if they cut fuel.
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Old 02-21-2008, 11:25 PM   #12
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thanks for clarifying
I suppose i was thinking in terms of nitrous, extra injectors, manifold mounted injectors.. that sort of thing

Not every car has the injectors mounted in the head.
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Old 02-21-2008, 11:28 PM   #13
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Either are ours
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Old 02-21-2008, 11:35 PM   #14
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Has anyone here implemented flat shifting with their megasquirt?
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Old 02-21-2008, 11:53 PM   #15
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pumas FTW
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Old 02-21-2008, 11:59 PM   #16
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Well, anyway, there is a strong possibility that there is going to be some fuel in between the injector and the inlet valve.

knock knock.. whos detonating?
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Old 02-22-2008, 10:45 AM   #17
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Quote:
Originally Posted by Niklas View Post
Well, anyway, there is a strong possibility that there is going to be some fuel in between the injector and the inlet valve.

knock knock.. whos detonating?
Thats why fuel cutting rev limiters are bad mmmkay.
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Old 02-22-2008, 11:07 AM   #18
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pumas FTW
remind me of my replicats, but i would love to have them in that color

I always thought cutting spark would be safer than fuel in case the fuel cut comes during and injector's cycle only adding a dash of the required fuel
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Old 02-22-2008, 11:35 AM   #19
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Quote:
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Has anyone here implemented flat shifting with their megasquirt?
Yeah, its fun but the tranny does not like it too much, but then again my 5spd has been abused for 100k miles.
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Old 02-22-2008, 11:38 AM   #20
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Quote:
Originally Posted by Niklas View Post
Wouldnt this be quite dangerous in case of any lingering gas?

edit: looked around a little, at least the UTEC standalone uses ignition cut, not fuel cut.
would you rather cut fuel, cylinder sparks and nothing happens

or

cut spark, injectors fill camber with fuel, then when you ignite again you backfire and blow flames out the tailpipe like an *******?
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