Notices
Evo Engine / Turbo / Drivetrain Everything from engine management to the best clutch and flywheel.

What is the point of an upgraded clutch?

Thread Tools
 
Search this Thread
 
Old Nov 12, 2003 | 12:30 PM
  #31  
CarPhoto.net's Avatar
Evolving Member
 
Joined: Sep 2003
Posts: 473
Likes: 0
From: LA, CA, USA
Originally posted by QuantumEVO
It can be likened to "give". Compare the transfer of forces to punching things. 2WD is like punching a mattress. AWD is like punching a brick wall.
AWD cars are not weak they just don't have anything to lessen the stresses or give like 2WD. Lightening the car yields a greater chance of spinning tires on launch which gets you back to the "mattress" concept a little.
AWD might be called a skilled driver's setup. It will provide greater performance but you have to be aware of what you are doing as you are more likely to break something; depending on the system.
Not all AWD systems are weak. They come in weak and strong variants (and everything in between) just like 2WD systems.
The EVO setup is quite good. It isn't the best, but is much better than most. Go check out the ATESSA ETS drivetrain. Now that's an amazing system. Getrag are know for building some great stuff.

Mark
www.Quantum-Racing.com
This guy makes a very good point. Many of us EVO drivers come from a much more forgiving 2wd system. Mistakes on those drivetrains only cause the wheels to spin for the majority of it.

Clutch is weak to protech the AWD system.
Reply
Old Nov 12, 2003 | 12:44 PM
  #32  
QuantumEVO's Avatar
Evolving Member
iTrader: (12)
 
Joined: Mar 2003
Posts: 407
Likes: 0
From: Columbus, OH
OK, I am going to say this just one time.
Lightened flywheels or clutches don't give ANY increase in torque or horsepower. It gives you a perceived increase when accelerating. Only when accelerating.
If what you say is true, then lightened wheels would give you HP. That is most certainly not the case.

Mark
www.Quantum-Racing.com
Reply
Old Nov 12, 2003 | 02:51 PM
  #33  
Mike W's Avatar
Evolving Member
iTrader: (1)
 
Joined: Dec 2002
Posts: 337
Likes: 4
From: Road Race Engineering
Originally posted by QuantumEVO
OK, I am going to say this just one time.
Lightened flywheels or clutches don't give ANY increase in torque or horsepower. It gives you a perceived increase when accelerating. Only when accelerating.
If what you say is true, then lightened wheels would give you HP. That is most certainly not the case.

Mark
www.Quantum-Racing.com
But the percieved increase in HP is because the car is acelerating faster, correct?

Since you are using less of the available HP to accelerate the now lighter flywheel or wheels, there is more HP available to accelerate the vehicle.

Mike W
Reply
Old Nov 12, 2003 | 03:25 PM
  #34  
QuantumEVO's Avatar
Evolving Member
iTrader: (12)
 
Joined: Mar 2003
Posts: 407
Likes: 0
From: Columbus, OH
Originally posted by Mike W


But the percieved increase in HP is because the car is acelerating faster, correct?

Since you are using less of the available HP to accelerate the now lighter flywheel or wheels, there is more HP available to accelerate the vehicle.

Mike W
Well it's torque any way but I know you know that.
Yes, of course, but you aren't always accelerating. A lightened rotating mass will give more apparent improvement the faster the motor is revving. That means the clutch or flywheel will be almost unnoticeable in 5th; quite noticeable in 1st and most when blipping the throttle (heel/toe). If you are at steady state (not accelerating) and full power you won't notice anything. I know you are trying to point out that it yields improvements nonetheless but I'm trying to point out to the non-"Not Newbie"s a few finer points as well.

Mark
www.Quantum-Racing.com
Reply
Old Nov 12, 2003 | 03:28 PM
  #35  
CarPhoto.net's Avatar
Evolving Member
 
Joined: Sep 2003
Posts: 473
Likes: 0
From: LA, CA, USA
Originally posted by QuantumEVO


Well it's torque any way but I know you know that.
Yes, of course, but you aren't always accelerating. A lightened rotating mass will give more apparent improvement the faster the motor is revving. That means the clutch or flywheel will be almost unnoticeable in 5th; quite noticeable in 1st and most when blipping the throttle (heel/toe). If you are at steady state (not accelerating) and full power you won't notice anything. I know you are trying to point out that it yields improvements nonetheless but I'm trying to point out to the non-"Not Newbie"s a few finer points as well.

Mark
www.Quantum-Racing.com
I agree, a lighter flywheel is not needed. Have you felt the stock flywheel. It's pretty light.
Reply
Old Nov 12, 2003 | 04:02 PM
  #36  
QuantumEVO's Avatar
Evolving Member
iTrader: (12)
 
Joined: Mar 2003
Posts: 407
Likes: 0
From: Columbus, OH
I think the car could benefit from a bit of lightened rotating inertia, but it isn't too bad as is.

Mark
www.Quantum-Racing.com
Reply
Old Nov 12, 2003 | 04:15 PM
  #37  
5StarSuzuki's Avatar
In Timeout
 
Joined: Jul 2003
Posts: 486
Likes: 0
From: Penn State University
Ok...I did some research

Lots of physic words and jargon spelled out... You don't gain HP from a lightened flywheel. But you do gain other things...very technical...blah. I'll post the link sometime.
Reply
Old Nov 12, 2003 | 04:41 PM
  #38  
DrMerl's Avatar
Evolving Member
 
Joined: Jul 2003
Posts: 343
Likes: 0
From: San Diego
The way I understand it if you actually increased HP the MAF sensor would go up in voltage (more air). If it doesnt you didnt make more HP, but took more advantage of what is there (a/f, timing, weight reduction, spinning mass reduction). Altering a/f or timing may increase HP and your MAF will register it. It could also not increase MAF voltage but change where that power comes in, changing your perception of power. Cams are notorious for this
Reply
Old Nov 13, 2003 | 12:18 AM
  #39  
evo2?'s Avatar
Newbie
 
Joined: Sep 2003
Posts: 60
Likes: 0
From: Manila. Philippines
I dont get this:

Technically speaking, the driver can control the amount of clutch slippage during a launch - regardless of type of clutch in place.

So you can put in the power clutch, use a slip launch technique, and feel safe that you didnt strain your drivetrain.
Reply
Old Nov 13, 2003 | 04:18 AM
  #40  
Mike W's Avatar
Evolving Member
iTrader: (1)
 
Joined: Dec 2002
Posts: 337
Likes: 4
From: Road Race Engineering
OK, for the newbies then. If I put a light weight flywheel in my EVO and you have a stock flywheel in your EVO.. my EVO will accelerate quicker that your EVO. Accelerating quicker is good.

Mike W
Reply
Old Nov 13, 2003 | 07:38 AM
  #41  
GranMassaX's Avatar
Evolving Member
iTrader: (11)
 
Joined: Jul 2003
Posts: 322
Likes: 0
From: Albany, NY
this thread has been incredibly informative, thanks!
Reply
Old Nov 13, 2003 | 08:40 AM
  #42  
QuantumEVO's Avatar
Evolving Member
iTrader: (12)
 
Joined: Mar 2003
Posts: 407
Likes: 0
From: Columbus, OH
Originally posted by evo2?
So you can put in the power clutch, use a slip launch technique, and feel safe that you didnt strain your drivetrain.
Yes, that's why I don't personally see a problem with a high torque slippable clutch as long as the loose nut behind the wheel isn't breaking things with it.

Mark
www.Quantum-Racing.com
Reply
Old Nov 13, 2003 | 08:41 AM
  #43  
QuantumEVO's Avatar
Evolving Member
iTrader: (12)
 
Joined: Mar 2003
Posts: 407
Likes: 0
From: Columbus, OH
Originally posted by Mike W
Accelerating quicker is good.

Mike W


Mark
www.Quantum-Racing.com

Last edited by QuantumEVO; Nov 13, 2003 at 09:27 AM.
Reply
Old Nov 23, 2003 | 06:10 PM
  #44  
2Tall4MyEvo's Avatar
Newbie
 
Joined: Nov 2003
Posts: 4
Likes: 0
Originally posted by QuantumEVO
OK, I am going to say this just one time.
Lightened flywheels or clutches don't give ANY increase in torque or horsepower. It gives you a perceived increase when accelerating. Only when accelerating.
If what you say is true, then lightened wheels would give you HP. That is most certainly not the case.

Mark
www.Quantum-Racing.com
So If i took my car on a dyno with 50lb. rims, your telling me that it would have the same results as with the stock 21lb rims? Rotating mass should affect HP at the wheels, it would seem the clutch would do the same, but in very small measurements.
Reply
Old Nov 23, 2003 | 07:15 PM
  #45  
Sweft's Avatar
Newbie
 
Joined: Jan 2003
Posts: 98
Likes: 0
On the contrary.

Lightened flywheel / rotating mass will add NO extra horsepower that your engine produced.

But it will effect the amount of power that is transfered to the wheels. Ex. You'll be putting down more HP at the wheels if you lighten your rotating mass at the same crank horse power.
Reply




All times are GMT -7. The time now is 04:24 PM.