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Rev Limiter

526 Views 7 Replies 6 Participants Last post by  CaymanMatt
Hello,
Curious about the rev limiter on the base 718. I've been staying below 4,000 for the first 2,000, but am getting close.
I'm new to Porsches but rode Honda sportbikes for years & regularly "bounced off the limiter" to no ill effect. One CBR RR burned no oil after 75,000 miles of use/abuse. Three other CBRs & VFRs went 50,000+ happily. They also, let you know before the party was over. Similar in the S2000.
So can I just let Ferdinand deal with it, or be more cautious?
Thanks.
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Hello,
Curious about the rev limiter on the base 718. I've been staying below 4,000 for the first 2,000, but am getting close.
I'm new to Porsches but rode Honda sportbikes for years & regularly "bounced off the limiter" to no ill effect. One CBR RR burned no oil after 75,000 miles of use/abuse. Three other CBRs & VFRs went 50,000+ happily. They also, let you know before the party was over. Similar in the S2000.
So can I just let Ferdinand deal with it, or be more cautious?
Thanks.
Ok, but WHY??
Tale a look at the torque curve for the Base 2.0 engine. You don’t “need” to run the car to redline thanks to the turbo torque. You can take it to 7500 RPM and the rev limiter will stop further increased engine speed. But for most applications you don’t need to and 6500 is still plenty fun and puts you right back in the torque curve again. It’s a bit different than the NA Porsches.

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On the non-turbo engines it was really fun up there & above 4,000 in my base 718 is terra incognita to me.
Tale a look at the torque curve for the Base 2.0 engine. You don’t “need” to run the car to redline thanks to the turbo torque. You can take it to 7500 RPM and the rev limiter will stop further increased engine speed. But for most applications you don’t need to and 6500 is still plenty fun and puts you right back in the torque curve again. It’s a bit different than the NA Porsches.
Thank you. Using the limiter always seemed mechanically unkind, but in the moment hard to avoid. Not much torque in CBRs.
speaking of this, as a first time porsche owner... I hear a lot about how prospective buyers for used porsches look at the DME report and its history data on counts of rev ranges, etc... is it specifically overrev'ed / money shifted-ness (for manuals, since PDKs wouldn't let you downshift beyond the rev limiter) they are looking for? or is hitting the rev limiter also a big minus point?
AFAIK the DME report uses five levels of overrevs. 1 and 2 are inconsequential and won't stop Porsche from CPO'ing the car, but will be recorded when the rev limiter is hit, even with PDK. The higher DME levels should only register for manual transmissions.
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Tale a look at the torque curve for the Base 2.0 engine. You don’t “need” to run the car to redline thanks to the turbo torque. You can take it to 7500 RPM and the rev limiter will stop further increased engine speed. But for most applications you don’t need to and 6500 is still plenty fun and puts you right back in the torque curve again. It’s a bit different than the NA Porsches.
The reality is that there is almost no overlap between the gears so running to redline is still beneficial for max acceleration. The advantage of the turbo engines though is that the broad torque curve means you are in peak torque situations without needing to row the gears to get there.
The 1st graph below shows this non-overlap and is for the 2.5 GTS (torque roll-off at 5500rpm) and 4.0 GTS but you can use the 2nd graph (2.0 & 2.5S) to imagine what the 2.0 graph would like through the gears - pretty much the same non-overlap.
I hope this helps.
FWIW

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