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-   -   Should I be using fuel cut for RPM limiter on my 500wrhp Fd? (https://www.rx7club.com/single-turbo-rx-7s-23/should-i-using-fuel-cut-rpm-limiter-my-500wrhp-fd-1070451/)

jetlude 08-28-14 02:10 PM

Should I be using fuel cut for RPM limiter on my 500wrhp Fd?
 
Did some research and found some for and against. I've been using fuel cut as opposed to ignition cut. Is this recommended?

Speed of light 08-28-14 02:40 PM

It works for me; I like the fuel cut method--it feels cleaner and less ragged. I've been flat shifting against this type of rev limiter for years with no problems whatsoever.

jetlude 08-28-14 05:31 PM

Are you using hard cut or soft cut? I am using hard cut

vrx8 08-28-14 07:30 PM

If you are on premix only i wouldn't recommend cutting fuel.

Speed of light 08-28-14 08:14 PM

Jetlude--I'm using hard cut.
(Lube is premix+OMP, fwiw.)

gxl90rx7 08-29-14 10:40 PM


Originally Posted by vrx8 (Post 11793598)
If you are on premix only i wouldn't recommend cutting fuel.

lol what do you think is happening during decel fuel cut

op, make sure your injector phase is set right, or you could cause a lean condition

jetlude 08-29-14 10:57 PM


Originally Posted by gxl90rx7 (Post 11794214)

op, make sure your injector phase is set right, or you could cause a lean condition

Please explain injector phase.

vrx8 08-30-14 10:55 AM


Originally Posted by gxl90rx7 (Post 11794214)
lol what do you think is happening during decel fuel cut

op, make sure your injector phase is set right, or you could cause a lean condition

For me still spraying fuel becuse I dont cut fuel on decel. :lol:

fendamonky 08-31-14 09:04 PM


Originally Posted by vrx8 (Post 11794375)
For me still spraying fuel becuse I dont cut fuel on decel. :lol:

This. ;)

Monkman33 09-02-14 03:42 PM

Injector phase. Assuring that each spray of fuel is fully drawn in by one intake cycle. Not over lapping. If tgey are overlapping, you can still have good afrs. However, when you start pulling individual pulses, it leaves a partial pulse to be drawn in, thus a lean condition.

jetlude 09-03-14 09:58 AM


Originally Posted by Monkman33 (Post 11795804)
Injector phase. Assuring that each spray of fuel is fully drawn in by one intake cycle. Not over lapping. If tgey are overlapping, you can still have good afrs. However, when you start pulling individual pulses, it leaves a partial pulse to be drawn in, thus a lean condition.

Ok, I just need to find this setting in the haltech.


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