Ways for faster revving when blipping the throttle??

[thatfilipinoguy]

Originally Posted by stugray

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.

Partially true on my part ;] I stand corrected!

[D K]

Im gonna pipe in a can of starter fluid to my intake track.
Once I figure out how to connect the nozzle to my throttle, I should have nice blippz!

[zdr93523]

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.

Is there a significant and noticeable benefit to the lightweight driveshaft for a dd/track car without the draw backs in daily driving of a lightweight flywheel? How do the two compare? My Cayman is very responsive due to the light flywheel and throttle programming, but at the same time, very difficult to not stall, especially on hills. Also, what are the practical pros/cons of an aluminum vs CF driveshaft, if it is a noticeable bang for your buck improvement?

[CSG David]

Originally Posted by zdr93523

Is there a significant and noticeable benefit to the lightweight driveshaft for a dd/track car without the draw backs in daily driving of a lightweight flywheel? How do the two compare? My Cayman is very responsive due to the light flywheel and throttle programming, but at the same time, very difficult to not stall, especially on hills. Also, what are the practical pros/cons of an aluminum vs CF driveshaft, if it is a noticeable bang for your buck improvement?

Lightweight driveshaft will feel different compared to the lightweight flywheel. The reason is quite simple. The light flywheel is going to require you to be a little more in tune with your car which requires you to have good reflexes when engaging the throttle and clutch in a coordinated fashion. Everything happens "quicker" with a light flywheel. The light driveshaft just lowers rotational inertia of the drivetrain as a whole. Yes it does make it better, but it's not lightyears away different. The response, of course, will be much improved over stock. How much is seriously based on user experience and preference. For reference, I daily drive on a 8lb flywheel in my personal car. I have absolutely no issues driving on 7 degree inclines or more.

CF is going to be a stronger setup. I wouldn't think there is a huge difference between the CF and the aluminum versions. Our tuning philosophy has always been doing things right the first time around. Obviously, not everybody is willing to go down that route as well so we have provided solutions that fit specific budgets and goals.

[7thgear]

Originally Posted by glamcem

I'm not sure how light flywheel/clutch combo can help when clutch pedal is depressed simply because there is no pressure on them ..I can understand when on the gear iit should definitely help the engine revs freely ..I think same can be said for the drive shaft too..so the only thing one my mind is the lighter pulleys or other methods that reduce the parasitic load/loss.. I don't have any experience with underdrive pulleys or lighter pulleys..

I see someone's never played any of the gran turismo series.


with the clutch disengaged the flywheel becomes one of the heaviest component that an engine must accelerate (the others being the crank and the combined weight of the 4 pistons), reduce it's weight and you reduce the speed at which the engine will rev up


the downside to this is that it also revs down quicker as well, which requires more finesse in engaging the clutch

[glamcem]

Originally Posted by 7thgear

I see someone's never played any of the gran turismo series.


with the clutch disengaged the flywheel becomes one of the heaviest component that an engine must accelerate (the others being the crank and the combined weight of the 4 pistons), reduce it's weight and you reduce the speed at which the engine will rev up


the downside to this is that it also revs down quicker as well, which requires more finesse in engaging the clutch

I actually knew the downsides of the lighweight clutch and flywheel but I didn't know that the flywheel also helps even when the clutch is disengaged which answered earlier..

I am surprised that nobody with SC kit mentioned this important detail, it's very very hard to heel toe with the current setup even after the Cusco accelerator pedal...gas pedal just feels so numb.. then again, this is my first SC car

[CSG David]

Originally Posted by glamcem

I actually knew the downsides of the lighweight clutch and flywheel but I didn't know that the flywheel also helps even when the clutch is disengaged which answered earlier..

I am surprised that nobody with SC kit mentioned this important detail, it's very very hard to heel toe with the current setup even after the Cusco accelerator pedal...gas pedal just feels so numb.. then again, this is my first SC car

You don't want to go too light on an FI car in general. It gets kind of annoying unless you want a higher idle...racecar status brah.

[CSG Mike]

Originally Posted by 7thgear

I see someone's never played any of the gran turismo series.


with the clutch disengaged the flywheel becomes one of the heaviest component that an engine must accelerate (the others being the crank and the combined weight of the 4 pistons), reduce it's weight and you reduce the speed at which the engine will rev up


the downside to this is that it also revs down quicker as well, which requires more finesse in engaging the clutch

IMO, it makes it easier to dump the clutch without drivetrain shock... as long as you learn to time it.

My light flywheel is one of my favorite mods on my s2k.

[glamcem]

Originally Posted by CSG David

You don't want to go too light on an FI car in general. It gets kind of annoying unless you want a higher idle...racecar status brah.

oh I don't care about the racecar status and would never consider getting a lightweight flywheel or clutch if it didn't cause a safety issue at track..

[CSG David]

Originally Posted by glamcem

oh I don't care about the racecar status and would never consider getting a lightweight flywheel or clutch if it didn't cause a safety issue at track..

Well you are curious as to how you can bring up the response with the blip of the throttle. Actually the lightweight flywheel is probably the best mod for it on top of tune. I ran an 8lb flywheel with a SC setup in the S2000 before. It was great, but the idle had to be brought up 200 RPMs to smooth it out. The car revved up perfectly for my use, but everybody else found it too quick.

[D K]

There may or may not be a 5.5" twin disk in the works.

[CSG David]

Originally Posted by D K

There may or may not be a 5.5" twin disk in the works.

[mike the snake]

I wonder why my throttle response is snappy when my car is warming up, but then sluggish when fully warm? When warming up, my throttle response is everything I've ever wanted.

I have to think that my tuner could make the throttle response snappy when warm, like it is when it's warming up, but I think it probably is really bad emissions-wise. I suspect it would be very rich momentarily?

My carbed race car had THE fastest throttle response I've ever seen. I know carbs have accellerator pumps, and I think that's partly why carbed cars seem to have better response than the injected cars I've driven.

[D K]

Im actually having the same issue at mo..

We are working to eliminate this.
My car has a tough time idling when heat soaked.
When it dies, I lose the pedal dance AND the good map

We have some ideas, but it can really make the difference in the lap time.

D

Originally Posted by mike the snake

I wonder why my throttle response is snappy when my car is warming up, but then sluggish when fully warm? When warming up, my throttle response is everything I've ever wanted.

I have to think that my tuner could make the throttle response snappy when warm, like it is when it's warming up, but I think it probably is really bad emissions-wise. I suspect it would be very rich momentarily?

My carbed race car had THE fastest throttle response I've ever seen. I know carbs have accellerator pumps, and I think that's partly why carbed cars seem to have better response than the injected cars I've driven.