Hi guys,

So I was thinking the other day about the fuel cutoff and how annoying it is. Especially in the low gears when it keeps pulling hard up to red line then it just cuts all power and you slow down pretty fast. I may sound like an idiot for asking this but could a bouncing rev limiter be tuned in? Not sure what this kind of rev limiter is called but I think all of you should know what I mean by bouncing rev limiter. If this was tuned in it would at least keep the power till you shift and it would sound cool. Haha I think it sounds like a good idea but it may actually be a really stupid one. Let me know guys.

 

The rpm limit set while you're spinning or the actual limit? Michael told me they won't go higher than 6500.

The only other thing i'm thinking of is traction control. do you have that off? Does ESC come on?

 

You had a Honda before this car didn't you.

It's a really stupid one, stock turbo is useless past 6000rpm anyways. And your just asking to break some lash adjusters

Try using the NLS, or just shift at 6k

 

What he said. Stock turbo just falls on its face past 6000 rpm. Can't move enough air so you lose HP after 6k lol

 

But if you do hit the rev limit the car basically falls on its face while others can bounce with a quicker reboud. I get what OP is saying..

 

Naturally aspirated cars will bounce back more quickly, sure. With boosted cars, you have dumped all the positive pressure at the rev limit cutout. It takes time to build that back up.

The tachometer on these cars lags behind. Shift sooner.

 

This.

 

Dont hit the rev limiter.
Problem solved.

/thread

 

Agreed shift sooner , it's not hard

 

what you think is the rev limiter is probably just the k04 running out of breath :P

 

i love how everyone on this forum views the rev limiter as a awful thing to hit.. the rev limiter can be used to your advantage. For example letting it bounce a couple times before shifting on a turbo car (that has more room to spool than the tiny k04 lol) can keep it spooled into the next gear. have you ever heard rally cars? They bounce through every gear all the time lol.

 

and i believe the reason ours is so slow is a tuning thing, has nothing to do with it being boosted. Theres a parameter that allows fuel again once a certain RPM is attained. If you make the gap smaller between fuel cut, and fuel again the bounce can be faster.

 

Having a higher fuel cut off is only useful if you got a car that can spin past 7200rpms, and at that point it would be tuned regardless.
so learn how to shift before it hits, put your radio down, use your ears not your eyes.

 

You literally pointed out one of the reasons everyone on this forum thinks hitting the rev limiter is retarted. Also the stock valve train does not like that at all and will start giving up

 

rally cars dont use cobalt motors that break lash adjusters when they smash the limiter, they also dont sit on the limiter to spool the turbo they use antilag.

 

They also tend to hit that limiter when they leave the ground and suddenly there is no road resistance lol

 

Or they have a curve coming up and don't want to upshift for a second just to downshift

 

Congratulations thats the dumbest thing I've ever heard.

 

Thank God! I thought it was just me.

 

If not the dumbest then the most misinformed

 

And anti-lag is what? An ignition cut rev limiter lol...

 

No....there is no fuel cut or ignition cut, one method uses timing retardation (big time and it dumps fuel to cool the cylinders) for a late ignition occurrence to maintain the turbine speed (others are a lot more complicated). The KO4 spools so damn fast it is not needed, and bouncing off the rev limiter does nothing other than make you look like a retarted ricer trying to play 80s formula 1 or rally car. Put it in comp mode and NLS if you're worried about losing boost, which is the system the LNF actually has engineering into it to not lose boost.

 

Yes sorry an ignition retardation. Nearly a cut at a 30-40* retardation. And nowhere did i say it was useful with the k04 as its been said in the thread already it loses hp past 6k rpms. I believe It could be useful with bigger turbos tho.

 

And its really not much more complicated than that. Basically because the ignition is so retarded theres still a huge amount of compression in the cylinder when the exhaust valves open up, therefore making almost no hp to the crank but pushing a huge amount of pressure through the exhaust to keep the turbo spooled. This method actually destroys turbos tho and thats when exhaust manifolds glow red lol.

Theres a couple other methods too.

 

You're on a cobalt forum, posting in a thread asking about bouncing off the rev limiter on a STOCK KO4 turbo, hence why everyone said this is retarded and you're retarded for trying to say that its a good thing then back tracking and going well it won't work well on a KO4, again no matter what the turbo is on a LNF if you want to keep boost use NLS (not saying you won't destroy a trans in the process). And yes the other methods are a tad more complicated than just retarding timing and dumping fuel, secondary air injection into the exh manifold is more complicated.