Rev happy.

[Zrussian13]

Why not leave it at 8k and shift at 7500? Then you are less likely to bounce off the limiter. That will be worse than reving 8k especiallywith a lighter flywheel. Honestly I rev 8k all the time and my motor went 96k before I blew it up and it wasn't the 8k shifts that killed it.

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[Mikes_Slow5oh]

Why not leave it at 8k and shift at 7500? Then you are less likely to bounce off the limiter. That will be worse than reving 8k especiallywith a lighter flywheel. Honestly I rev 8k all the time and my motor went 96k before I blew it up and it wasn't the 8k shifts that killed it.

That’s a fair point! I’m just want to make sure the engine can handle that kind of RPM with the lighter flywheel

 

[Zrussian13]

That’s a fair point! I’m just want to make sure the engine can handle that kind of RPM with the lighter flywheel

I have a dual mass so can't comment on that but 500rpm wiggle room will help keep you off the limiter!

 

[andrewtac]

Why not leave it at 8k and shift at 7500? Then you are less likely to bounce off the limiter. That will be worse than reving 8k especiallywith a lighter flywheel. Honestly I rev 8k all the time and my motor went 96k before I blew it up and it wasn't the 8k shifts that killed it.

This, as it seems bouncing off the limiter is not good. If you plan on shifting at 7500 and put the limiter at 7500, you will likely shorten the life of the motor.

 

[K4fxd]

I'll add in here too, keep the limiter at 8K or raise it to 8200 and shift at 75 to 7800. With the lighter flywheel bouncing off the limiter will probably be safer but best not to. It's hard on the timing chains along with the sprocket and oil pump gears.

 

[JetGray_Mach1]

Wow must rev insane . The Coyote already revs really fast, I never thought of making the flywheel even lighter!

I am going to throw something out there. The Mach 1 tune does not allow it to bounce off the rev limiter when you hit redline (it just cuts off fuel - No lift shift feature). Its like the car shuts off and does not shock the engine or drivetrain at all. My question would this not be a safer approach to a limiter since I know bouncing off the limiter is what may cause OP gear failure? Not sure if there is any tuners out there that provide this type of tune.

 

[Mikes_Slow5oh]

Wow must rev insane . The Coyote already revs really fast, I never thought of making the flywheel even lighter!

I am going to throw something out there. The Mach 1 tune does not allow it to bounce off the rev limiter when you hit redline (it just cuts off fuel - No lift shift feature). Its like the car shuts off and does not shock the engine or drivetrain at all. My question would this not be a safer approach to a limiter since I know bouncing off the limiter is what may cause OP gear failure? Not sure if there is any tuners out there that provide this type of tune.

I have no idea but I’m not sure if cutting off fuel while under boost is going to be a good idea. I know air/fuel ratio is extremely important for cars running boost so I’m not sure how that would work.

 

[Angrey]

Wow must rev insane . The Coyote already revs really fast, I never thought of making the flywheel even lighter!

I am going to throw something out there. The Mach 1 tune does not allow it to bounce off the rev limiter when you hit redline (it just cuts off fuel - No lift shift feature). Its like the car shuts off and does not shock the engine or drivetrain at all. My question would this not be a safer approach to a limiter since I know bouncing off the limiter is what may cause OP gear failure? Not sure if there is any tuners out there that provide this type of tune.

Not really, it may be manageable N/A but with compressed air coming in at it's peak at redline, the last thing you want to do is go lean, that's a recipe for carnage. In fact, the WOT lambda/fuel mixture is intentionally set lower to provide an additional measure of knock resistance (among other things), cutting fuel would spike it.

Are you really sure that's how it's managing the no lift shift feature?

And remember, we're mixing two different conditions here, no lift shift the drivetrain is unloaded and disconnected, the motor still has to have over-rev protection when the power train is loaded.

 

[Mikes_Slow5oh]

Not really, it may be manageable N/A but with compressed air coming in at it's peak at redline, the last thing you want to do is go lean, that's a recipe for carnage. In fact, the WOT lambda/fuel mixture is intentionally set lower to provide an additional measure of knock resistance (among other things), cutting fuel would spike it.

Are you really sure that's how it's managing the no lift shift feature?

And remember, we're mixing two different conditions here, no lift shift the drivetrain is unloaded and disconnected, the motor still has to have over-rev protection when the power train is loaded.

That’s what I thought. I meant to say not a good idea and not good idea.

 

[JetGray_Mach1]

Not really, it may be manageable N/A but with compressed air coming in at it's peak at redline, the last thing you want to do is go lean, that's a recipe for carnage. In fact, the WOT lambda/fuel mixture is intentionally set lower to provide an additional measure of knock resistance (among other things), cutting fuel would spike it.

Are you really sure that's how it's managing the no lift shift feature?

And remember, we're mixing two different conditions here, no lift shift the drivetrain is unloaded and disconnected, the motor still has to have over-rev protection when the power train is loaded.

I understand what you mean. I am not really sure how Ford does it but I just wanted to point out how smooth it is. Just bringing it up in case anyone here knows how it works or if it’s even possible on a boosted application.

 

[JetGray_Mach1]

And remember, we're mixing two different conditions here, no lift shift the drivetrain is unloaded and disconnected, the motor still has to have over-rev protection when the power train is loaded.

Actually even if loaded if you hit redline it will do the same. The Coyote revs so freely at one point I hit the limiter by mistake and it just cut power instead of bouncing on the limiter. That is what I am talking about.

 

[Mikes_Slow5oh]

I've always wondered why more people don't do lighter flywheels but apparently it can make daily driving more of a chore.

Let us know if you'd do it again after some more time.

So I’ve had several months of driving now and I would absolutely do this again! I didn’t suffer any drivability even in heavy traffic.

 

[Mustang_Lou]

So I’ve had several months of driving now and I would absolutely do this again! I didn’t suffer any drivability even in heavy traffic.

Which flywheel did you end up going with and what was the cost +/-? Thks

 

[Mikes_Slow5oh]

Which flywheel did you end up going with and what was the cost +/-? Thks

It was the VMP kit with a twin disk clutch. I think it was 1200 for the kit.

 

[Mikes_Slow5oh]

Which flywheel did you end up going with and what was the cost +/-? Thks

Sorry it was the Lethal Performance kit!

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