NA fuel cut removal?

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Nov 14, 2002 | 10:32 AM

#26

Icemark

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From: Rohnert Park CA

In therory if you have a S5 engine and you used a S5 tranny/flywheel/clutch/etc your redline would go up to 8000.

Nov 14, 2002 | 10:45 AM

#27

Samps

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Joined: May 2001

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From: Pittsburgh, PA

What about the limiter? If a manual has an 8k redline then they made the rev limiter to kick in at just above that; but an automatic's redline is 7k so in theory the rev limiter should be 1k less than the manual. Maybe mazda ignored the rev limiterin the auto due to shift points being controlled by the ecu; but maybe not! Where would I need to look in the FSM?

Nov 14, 2002 | 10:48 AM

#28

jeremy

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From: St Petersburg, FL

Quote:

Originally posted by jon88se
NA's do not have a fuel cut, just a rev-limiter. Fuel cuts are used in turbo cars as a safety tp prevent running dangerous boost pressures w stock fuel systems. Fuel cut doesn't drop power when triggered...ther motor cuts out and the car feels like it hits a brick wall!! In my GVR4 I used to hit fuel cut on very cold nights w/ my big ported 16G spinning 1.2 bar

actually they use ignition cut. but it is a type of rev limiter. you can control revs by combustion. two effects controlled on combustion being mixture and ignition. on turbo cars it is dangerous to use fuel as the means off cut since it will cause a massive lean condition and on a rotary could pop the motor. that is why all haltech rotary maps that i know of use the ignition selection.