Lighten Flywheels - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

*Jeff240sx* · 02-23-2002, 01:53 AM

</span><table border="0" align="center" width="95%" cellpadding="3" cellspacing="1"><tr><td>Quote </td></tr><tr><td id="QUOTE">Quote: from Gismo R on 3:29 pm on Feb. 22, 2002
Oh yeah, I've also heard that an averege of like 2.5 HP is gained for every lbs. taken off the crank. Not sure how much they weigh but I believe it's like 8 lbs. lighter. With those figures it seems like you should gain about 20hp. Not sure about how much truth is in that, but it's what I've heard.
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Not at all 2.5hp per pound.  I believe the stock weighs 18 and a Fidanza weighs 8 lbs.  This would be a 25 horsepower increase according to that math!?!  I'm kinda sure that the entire drivetrain doesn't lose that much power, and you're gonna get all it back and then some with a flywheel that has been established to lessen losses and NOT create power.
I believe that the increase in wheel power would be minute on a dyno.  Possibly let another 2 or 3hp back there.
This is why I said the weight loss from the car is a better way to look at it.  Not adding power, yet going faster.  Also.  What would you rather pay $400 for?  A couple ponies, or 100# weightloss.
-Jeff

02-23-2002, 01:53 AM	#22
Jeff240sx I hate you too... Join Date: Jul 2001 Location: Tampa, FL Age: 42 Posts: 5,828 Trader Rating: (0) Rides Gallery: Jeff240sx Feedback Score: 0 reviews	</span><table border="0" align="center" width="95%" cellpadding="3" cellspacing="1"><tr><td>Quote </td></tr><tr><td id="QUOTE">Quote: from Gismo R on 3:29 pm on Feb. 22, 2002 Oh yeah, I've also heard that an averege of like 2.5 HP is gained for every lbs. taken off the crank. Not sure how much they weigh but I believe it's like 8 lbs. lighter. With those figures it seems like you should gain about 20hp. Not sure about how much truth is in that, but it's what I've heard. </td></tr></table><span id='postcolor'> Not at all 2.5hp per pound.  I believe the stock weighs 18 and a Fidanza weighs 8 lbs.  This would be a 25 horsepower increase according to that math!?!  I'm kinda sure that the entire drivetrain doesn't lose that much power, and you're gonna get all it back and then some with a flywheel that has been established to lessen losses and NOT create power. I believe that the increase in wheel power would be minute on a dyno.  Possibly let another 2 or 3hp back there. This is why I said the weight loss from the car is a better way to look at it.  Not adding power, yet going faster.  Also.  What would you rather pay $400 for?  A couple ponies, or 100# weightloss. -Jeff