centurion
Well-Known Member
What causes throttle lag on a naturally aspirated car?
On turbos I understand, and even then, the throttle lag should not happen on the low end. On NA the usual explanation is ... electronic throttle to blame. I would like to blame it on the electronic throttle but really, electronics can be made really fast. I'd really like a real explanation on the throttle delay felt on today's cars. In fact, throttle mapping can easily bias towards low pedal angle and eliminate the throttle delay totally. Is that the flywheel? Is it by design? Is it that the ECU has to wait for the air mass sensor before it dare to press on?
The F430, R8 has NO THROTTLE DELAY whatsoever. The old Porsches all the way to 964 have no delay. Hell the S2000 has no delay.
But the Cayman has a very slight delay. The BMW 325,525 have lots of delay. The old 30 engine, even in the 630 application, is between the Cayman and the 325 in duration. The 3 valve 2.6 Merc engine and the new 4 valve 3.5L Merc engine delay like can grow a beard.
WTF? Can we just hardwire the AMS to give the `correct' output so that our throttle no delay?
I'm almost gonna change the flywheel because of this. That will ASSURE me good throttle response, at the expense of traffic jam driveability. But before I do that, is there anything else I can do?
On turbos I understand, and even then, the throttle lag should not happen on the low end. On NA the usual explanation is ... electronic throttle to blame. I would like to blame it on the electronic throttle but really, electronics can be made really fast. I'd really like a real explanation on the throttle delay felt on today's cars. In fact, throttle mapping can easily bias towards low pedal angle and eliminate the throttle delay totally. Is that the flywheel? Is it by design? Is it that the ECU has to wait for the air mass sensor before it dare to press on?
The F430, R8 has NO THROTTLE DELAY whatsoever. The old Porsches all the way to 964 have no delay. Hell the S2000 has no delay.
But the Cayman has a very slight delay. The BMW 325,525 have lots of delay. The old 30 engine, even in the 630 application, is between the Cayman and the 325 in duration. The 3 valve 2.6 Merc engine and the new 4 valve 3.5L Merc engine delay like can grow a beard.
WTF? Can we just hardwire the AMS to give the `correct' output so that our throttle no delay?
I'm almost gonna change the flywheel because of this. That will ASSURE me good throttle response, at the expense of traffic jam driveability. But before I do that, is there anything else I can do?
