The car is a stock 9 with Tomei M7960 turbo, what would be a good limit for NLTS with such stock engine & mid-sized turbo? I set max rev limit at 7800, but I don't feel any power band gains beyond 7000-7200rpm, boost seems to tapper down from 25psi after 6000rpm, plus, cams are stock. I'm guessing that 6000-6200rpm might be a good limit.
I'd appreciate any 'based on experience' opinions

 

It sounds like you're looking for your optimal shift rpm, not "NLTS limit".

 

Well, I mentioned that power seems best at 7000-7200, so, that's my current shift rpm.

 

I think it's generally recommended to shift no earlier than peak hp. After peak hp, you want to find a high enough rpm so that after the shift you will be after your peak torque. This'll depend on your powerband.

 

You mean that NLTS limit should be 'in general' higher than my shift rpm?
I imagine that the cut might be violent if NLTS is set lower than shift rpm, if I'm shifting at 7200 & NLTS is set @ 6800, how would the engine react when the clutch is depressed at 7200rpm??

I'd appreciate any feedback from people that use NLTS before I go on testing & ruin my clutch :}}

 

What "NLTS limit" are you talking about? Are you talking about the lower threshold? If so, that limit just means that below that rpm NLTS can't be used.

 

I think he means the value of how much the rpms will drop when the clutch pedal is depressed. I think my car on stock IX turbo with basic bolt ons (IC and piping, intake, turboback, injectors, fuel pump) had an NLTS drop value of 800 rpm. So if I shifted at 7,000 for example, it would instantly cut down to 6200 and hold their until the shift was executed. It will take some time to get this dialed in and varies largely from car to car based upon the driver and the fact that every car is different. Hope this helps.

 

If that's what he's talking about then he definitely shouldn't be using values over 6k rpm, lol.

 

The current general rev limit is 7800rpm, I'm shifting at around 7200rpm, I'll set NLTS drop at 1200rpm for start, that makes NLTS rev limit 6600rpm. I know that it might take some trail & error before reaching an optimal limit, but I'm a little worried when the rpm reaches 7200 or more, & the clutch is depressed, cut is suppose to be at 6600 but the engine is already at a higher rpm, I'm worried that the rev cut might be a little violent in such case!

 

I don't think you understand what these limits mean...

 

What I don't really understand is WHY you even bother replying when you never understood my initial question???

 

If you set your drop its a subtractive amount. I used 700rpm drop. I shift at 7300ish and if I short shift its the same drop. When you clutch in it subtracts. In my eyes it's a little better to have the drop end up on the higher side of optimal than the lower side. For all intents and purposes you can shift at 4000 rpm and the nlts will still subtract 700. I've done it. The pedal is sensitive though because its a dead man type switch so it gets unloaded when depressing .

Sounds like you're used to the subaru type rev limiter nlts

 

You're right, with Subarus, the drop number is subtracted from the actual rev limit.
It makes more sense that nlts is related to shift rpm in Evos, I have an idea where to start now!

 

The clutch pedal like I said is sensitive, check your load threshold and tps. Otherwise light or medium throttle coupled with a traditional clutch in clutch slip shift is gonna drive you nuts and that will.. Be.. Jerky.. Lol

The car has a top clutch switch right? I know some years some markets don't

 

I'm not sure about the switch, the car is 07 JDM MR.
So, it would make sense to set tps threshold to near max & load threshold high enough.