lightened flywheel
#1
rotaryfreak
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lightened flywheel
My clutchplate is starting to slip when I accelerate, so it's about time for a new one, while I'm in there, I was thinking about installing a lightened flywheel. Now someone told me that if I install one I'm going to lose torque...? So my question is now what is the best way to go? Anyone have any suggestions? My engine is stock except for an pettit intake, emptied precat and hks catback, still on stock cat.
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rotaryfreak
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hmm, just read this thread about the stock clutch... Only 300 bhp? Maybe I'd be better of upgrading the clutch then... Since I'm planning a pfc install...?
#7
Original Gangster/Rotary!
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Go with the ACT street/strip clutch (part # HD-00) and a lightened aluminum flywheel. I daily drove this setup for over 3 years and *loved* it. No disadvantages whatsoever, except if you plan on launching at the drag strip often. Otherwise, the setup is worlds better than stock.
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#9
rotaryfreak
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thanks for the link mahjik, great info!!!
An aluminium? I was thinking about going with the pettit alu flywheel(8.5lb) or the 9.5lb steel one, which would be best? Or do you have a better suggestion on brand of flywheel? I'm going to go with the clutch assembly you suggested.
Originally Posted by GoodfellaFD3S
Go with the ACT street/strip clutch (part # HD-00) and a lightened aluminum flywheel. I daily drove this setup for over 3 years and *loved* it. No disadvantages whatsoever, except if you plan on launching at the drag strip often. Otherwise, the setup is worlds better than stock.
Last edited by htharv; 08-21-05 at 11:17 AM.
#11
Originally Posted by cmartinp28
do you drive your car on a daily basis? cuz if you do, you might want to double think spending 400 dollars on a lightenned flywheel
#12
Power Trippin'
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For those of you w/ a lightened flywheel, do you have any noise or vibration issues especially upon deceleration or engine braking?
(See warning disclaimer: http://www.flyinmiata.com/index.php?...umber=08-26000)
I had one in a previous car and the noise drove me crazy!
(See warning disclaimer: http://www.flyinmiata.com/index.php?...umber=08-26000)
I had one in a previous car and the noise drove me crazy!
#13
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the advantage to the light steel one is not so much the overall weight reduction, but the weight is moved to the center of the disc instead of being on the outer edges.
think of it like a merry go round. when your on the outside gravity pulls you alot, but if u sit in the middle, theres not much g forces.
so the point is taht u can have a fly wheel that spools faster and yet offers good driveability.
i have not noticed any extra noise when i changed the flywheel, but i dont have the aluminnum one.
think of it like a merry go round. when your on the outside gravity pulls you alot, but if u sit in the middle, theres not much g forces.
so the point is taht u can have a fly wheel that spools faster and yet offers good driveability.
i have not noticed any extra noise when i changed the flywheel, but i dont have the aluminnum one.
#15
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Originally Posted by htharv
So if I read correct, The best way to go would be a medium lightened flywheel?
Like a 12.5 lb rather than a 9.5 lb? both steel btw...
Like a 12.5 lb rather than a 9.5 lb? both steel btw...
With that said, I use a 9.5lb ACT prolite flywheel. I absolutely LOVE the setup, and after running it, I would never go with anything heavier. It gives the car a much more responsive feel. I do mainly street driving with a fair share of autocrossing and HPDE. Very few drag events.
-Rob
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Its going to accel. faster its just it will be harder for the initial engagement of the clutch off the line, because the engine is going to stall easier due to less rotating mass. But if you get that figured out the car is going to be faster.
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rotaryfreak
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Originally Posted by SPICcnmGT
Its going to accel. faster its just it will be harder for the initial engagement of the clutch off the line, because the engine is going to stall easier due to less rotating mass. But if you get that figured out the car is going to be faster.
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Originally Posted by GoodfellaFD3S
Go with the ACT street/strip clutch (part # HD-00) and a lightened aluminum flywheel. I daily drove this setup for over 3 years and *loved* it. No disadvantages whatsoever, except if you plan on launching at the drag strip often. Otherwise, the setup is worlds better than stock.
~Kris
#21
Originally Posted by SpeedKing
For those of you w/ a lightened flywheel, do you have any noise or vibration issues especially upon deceleration or engine braking?
(See warning disclaimer: http://www.flyinmiata.com/index.php?...umber=08-26000)
I had one in a previous car and the noise drove me crazy!
(See warning disclaimer: http://www.flyinmiata.com/index.php?...umber=08-26000)
I had one in a previous car and the noise drove me crazy!
Originally Posted by SPICcnmGT
Its going to accel. faster its just it will be harder for the initial engagement of the clutch off the line, because the engine is going to stall easier due to less rotating mass. But if you get that figured out the car is going to be faster.
From back in '03 (https://www.rx7club.com/showthread.p...7&page=2&pp=15)
Originally Posted by duboisr
a flywheel can not develop hp ,it can let the motor rev quickly which feels like more hp.
Originally Posted by rynberg
That is not correct. The engine must spend energy to rotate the flywheel. A lighter flywheel or one with more of the mass towards the center will require less energy to rotate. The effect is more hp to the wheels. Max Cooper did some research and calculated that you will get around 50 more hp to the wheels in 1st gear, around 16 in 2nd gear, and neglible in the higher gears. It does not "feel" like more hp, it allows more horsepower to the wheels -- less drivelines loss.
http://www.maxcooper.com/rx7/parts_i...heel/index.htm
http://www.maxcooper.com/rx7/parts_i...heel/index.htm
#22
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I have a 12.5lb unit and it pretty much the same as stock. I see no negative aspects at all sounds like 3.5lbs is a big change.
I would think that this is one of those upgrades that reduces powertrain loss.
I would think that this is one of those upgrades that reduces powertrain loss.
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