Flooring it at low RPM, higher gear

ems657

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In your example (2K RPM in 3rd), I would just downshift to 2nd and then WOT.

I came from a STi, and learned a few things "not" to do on a turbo engine. I also think OP's question is a separate subject from lugging ....

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Zeffy94

Zeffy94

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In your example (2K RPM in 3rd), I would just downshift to 2nd and then WOT.

I came from a STi, and learned a few things "not" to do on a turbo engine. I also think OP's question is a separate subject from lugging ....

Cheers,
I feel like I downshift too much already (as in every time I am coming to a stop). And you are correct - I’m not talking about lugging the engine.

What other things did you learn from owning an STI? :p
 

RedGiant217

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I feel like I downshift too much already
I can't tell if you're joking. If so, then ignore the rest.

You are not damaging the transmission by shifting (up or down). You want to keep the RPM in a happy range, so never be afraid to shift gears to keep the engine happy.

To your OP, 50-75% throttle in 3rd gear @2k RPM should not be a problem, assuming you're not going uphill. I would not go WOT before 2500-3000 RPM.
The great thing about a MT is that you can feel when you're doing it wrong. If you give it gas, and it's not accelerating, shift down and try again.
 
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Zeffy94

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I can't tell if you're joking. If so, then ignore the rest.

You are not damaging the transmission by shifting (up or down). You want to keep the RPM in a happy range, so never be afraid to shift gears to keep the engine happy.

To your OP, 50-75% throttle in 3rd gear @2k RPM should not be a problem, assuming you're not going uphill. I would not go WOT before 2500-3000 RPM.
The great thing about a MT is that you can feel when you're doing it wrong. If you give it gas, and it's not accelerating, shift down and try again.
I was joking somewhat. I like to go down through the gears whenever i am slowing down instead of riding the gear and downshifting to the correct gear (skipping gears of needed) - blame my absolutely terrible reliance on the auto rev match system spoiling me.
 

ShaRm3064

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These cars are drive by wire. I think there is some safety measures that will reduce the chances of LSPI. Im just guessing as im not sure. If it was a cable thottle it is an issue with turbo cars, i dont think it is with drive by wire as it connects to a computer.
 


idragmazda

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Just to be safe, i generally don't apply much throttle unless i'm north of 3000 rpm in any gear (even highway cruising i'll drop down to 5th)
 

leolulz

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Ofcourse we need to keep our babies safe and not destroy them but...

You are overthinking this way too much. This is not an old modified WRX with an 3" bolt-on exhaust with a manual boost-controller.

Honda adverts the car to produce max torque at 2500rpm, why would you not be able to WOT at that RPM on a stock car?
Also, compared to old turbo cars it has a Drive-by-wire system and electronic wastegate. No cable or vacuum to mess things up.
 

shadow

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At low rpms, the connecting rod bearing has a longer dwell time on the crankshaft journals. That puts more load on the oil film that separates the bearing from the journal. Dwell time is also affected by what gear you are in.

In the STI community, it is recommended not to boost before 3,000 rpm to reduce chances for rod bearing failure. On my STI I do not boost before 3,000 rpm, limit boost till 3,500 rpm, then do as I please above that.

On the other hand I had a 99 Civic with a JDM ITR engine with a Jackson Racing supercharger that I would hammer at 1,500 rpm. I did that for over a decade and when I sold the car, the engine was still in perfect condition.

Boils down to do you have faith in the Honda engineers?

Looking at the Honda's website, 295 lb-ft from 2,500 to 4,500 rpm seem to imply that it is ok to go full throttle at 2,500 rpms.
 
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elusiveaura

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Random question. Do we know how much torque the stock type r clutch will safely hold?
 

remc86007

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It's probably safe to do whatever you want to a stock type r. I imagine Honda put all the necessary safeguards in place. However, many of us are running aftermarket tunes, and I'm not sure all the precautions are still in place. Since I'm tuned, I don't give full boost before 3k.
 


ez12a

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I think honda tuned this car to be incredibly tolerant of "dumb" mistakes. Gone are the days of Mazdaspeed3s blowing their engines from a slight uphill with cruise control. Gone are the days of turbo-timers, etc. We have yet to see anyone blow a motor with a stock tune/no-mods.

We live in a day and age where turbos are commonplace and incredibly accessible to the everyman.
 

19typeRblk

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Love my CTR and the 6 speed transmission.
Not a good idea to put your engine under undo stress. In my case I always downshift if I feel the car is out of the power range for any given gear
and I'm pretty sure my car is happy for it.
 

JoYu

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LSPI low speed pre ignition is the reason you don't want to according to this engineering explained video. Skip to 3:50
 

Mcclaughry95

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Maybe I’ve been hanging out in the Civic Si forum too much, but I’ve had this lingering question in the back of my head for awhile now.

If you’re at low RPM, say 2k, in about 3rd gear and you mash the throttle, is it bad for the clutch/engine? Not necessarily WOT either; more like 50-75% throttle pressure (according to the dashboard display).

I know that if you do this in an overdrive gear such as 5th or 6th it can be more harmful, but the other gears I’m unsure of. The only one that I would guess is fine is 1st gear for obvious reasons. I am guilty of accelerating at about 35-45% throttle at 2200RPM in 5th gear to maintain my speed, I don’t know if that is causing any harm or not.

I’ve read that you don’t necessarily want to be flooring it in a turbo car at low RPM in a higher gear because of something to do with boost pressure and the engine internals or something. Plus I think it causes the clutch to wear faster and cause it to start slipping?

I know it’s a dumb question :dunno:
I traded up from an 18 SI that was on tsp stage 1 and the only issue is the weak clutch they put in that car. Should not be an issue ever unless your tuned.
 

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lspi is the issue they even changed the oil ratings to help reduce it. if you notice the motor oils have a sn plus rating now.
i try not to lug the engine i dont want to pound the rod bearings up.
yes the ecu can pull timing and stuff to prevent it. but it has to detect knock first.
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