Ways for faster revving when blipping the throttle??

[fooddude]

Originally Posted by SmsAlSuwaidi

You'd want a very light flywheel, i have a 10.5 pound one and my revs jump to over 3 with slight blips

LFA..jk haha.

[SmsAlSuwaidi]

Originally Posted by fooddude

LFA..jk haha.

As fast as one, but has a stick lol


Sent from my IBrick

[SportInjected]

Another thought: with a lighter flywheel, the engine will rev faster, but the revs will drop off quicker as well, so you have to be quick with your downshifts.

[Robbie]

Originally Posted by thatfilipinoguy

You'd want a light weight flywheel...the clutch has nothing to do with the rotation of the crank when you are rev matching.

Yes it does. What is the clutch pressure plate attached to? The flywheel. That means that the pressure plate is always spinning and has an effect on the rotational inertia of the engine.

[stugray]

Originally Posted by thatfilipinoguy

You'd want a light weight flywheel...the clutch has nothing to do with the rotation of the crank when you are rev matching.

Not really true.

The clutch "disk" has nothing to do with it when the clutch is depressed because that part is attached to the transmission input shaft.
However that disk is a small fraction of the mass of the entire clutch.

The heavier part is the pressure plate which is attached to the flywheel and makes a HUGE difference to the overall mass of the rotating assembly.

By getting a lightened flywheel and a lighter pressure plate, you will see a huge difference in rev up/down.

[CSG David]

Easy. Light flywheel, low inertia clutch kit, and tune that throttle positioning.

If you want better response, full blue printed motor, titanium transmission gears, ultra lightweight driveshaft and half shafts.

[glamcem]

Originally Posted by CSG David

Easy. Light flywheel, low inertia clutch kit, and tune that throttle positioning.

If you want better response, full blue printed motor, titanium transmission gears, ultra lightweight driveshaft and half shafts.

Small problem though, I don't have deep sockets if I did I would possibly never consider a SC but instead go with full motor/race engine specs ..even if I didn't have the SC power..

BTW, how is the throttle positioning affect the revving speed when clutch depressed ? I asked my tuner to send me a more aggressive throttle mapping and with that I can clearly notice the responsiveness when in gear but couldn't difference any change when clutch is depressed

[glamcem]

Originally Posted by SportInjected

Another thought: with a lighter flywheel, the engine will rev faster, but the revs will drop off quicker as well, so you have to be quick with your downshifts.

I have no problem with being quick on my downshifts

But yes, I know the side effects of lighter flywheel ..with that said being able to rev match is a lot more important and it's very critical at the track if you really push your car with SC

[mike the snake]

Our cars are completely numb when revving from idle. I don't know whether it's the drive by wire or the tune, but they rev very slowly. I suspect it is the tune mainly.

When my car is warming up, the throttle response is great, super snappy, but when fully warmed up it goes back to sluggish.

My tuner made some changes that improved the throttle response as well, so I know the throttle response can be improved at least in part by the tune.

Of course, lightening the rotating parts (flywheel, clutch, driveshaft) will help with throttle response, but the main issue lies more within the tune, or the type of induction IMO.

My old race car with carbs had insane throttle response. I saw other cars with the same engine, but fuel injected, that had much slower throttle response.

I think fuel injection gives less of a shot of fuel with throttle movements. Carbs have accellerator pumps. I think fuel injection basically does the same thing (a shot of fuel to get things up and running) but the throttle response is still very sluggish on our cars, especially with such high compression.

[CSG David]

From experience, you don't want instantaneous quick response on the throttle with direct injection lol. That will be deep pocket territory too.

Originally Posted by glamcem

Small problem though, I don't have deep sockets if I did I would possibly never consider a SC but instead go with full motor/race engine specs ..even if I didn't have the SC power..

BTW, how is the throttle positioning affect the revving speed when clutch depressed ? I asked my tuner to send me a more aggressive throttle mapping and with that I can clearly notice the responsiveness when in gear but couldn't difference any change when clutch is depressed

[stugray]

I am guessing here, so go easy on me:

The ROM has two tables called "Requested Torque A (Accelerator Pedal)" and a "B" version.

The values in the table indicate "driver requested torque based on accelerator pedal angle and engine speed. This value is used to determine the target throttle position"

The two tables A&B have vastly different values in them.
Table A has much larger values than table B.

Here's my guess: Table A is probably used when the ECU determines if the driver is accelerating and table B if decelerating.
(I am probably wrong).

But it seems that adjusting the values in Table B might give you a faster spin down.

[glamcem]

Maybe @moto-mike can chime in share his thoughts with us on that

[glamcem]

Originally Posted by CSG David

From experience, you don't want instantaneous quick response on the throttle with direct injection lol. That will be deep pocket territory too.

nope we don't want that so I think the safest way to improve that is changing the clutch/flywheel combo with a lighter alternative ..

[glamcem]

Has anyone adjusted the gas pedal I wanna see if the Cusco pedal helps a bit and maybe raising the pedal a bit (if possible of course) but then again all these methods don't really address the main issuw they seem like just temporary fixes/patches