Acceleration
02-14-2008, 11:41 PM
#27
Super-impreza!
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unsprung weight is king! exactly why the fidanza flywheel completely stomps the others, and why Charles R. Hill's flywheel upon release will hopefully even surpass that. Can't wait for that 
02-16-2008, 09:22 AM
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02-16-2008, 09:34 AM
#30
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No one has mentioned 2 piece rotors. About $325 each and should save about 5 lbs. per corner. Yes, they are just as expensive as lightweight wheels, but another option.
02-16-2008, 11:32 AM
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I'm saying how much weight per corner. 7.5 pounds per wheel is a riduclous weight savings and also nothing that will come inexpensively. You are looking at forged magnesium to attain weight loss like that from wheels alone.
LM= U-Mold >>21.5 lb.
H= Hitachi >>22.5 lb.
If you believe Tire Rack weights, then
Kosei K1-TS 17x8 +45et $199 >>15.4 lb.
MOTEGI TRACK TRAKLITE 17x8 +45et $288 >>15.0 lb.
MOTEGI TRACK TRAKLITE 2.0 17x8 +45et $288 >>14.6 lb.
Enkei Racing RPF1 17x9 +45et $250 >>15.5 lb.
So you'll be looking at 6 to 8 lbs savings depending on which stock wheels you have and which wheels you end up choosing. No forged mag necessary.
And you'll probably end up saving about 2 lb. with a 235/40-17 compared to the same model of 225/45-18. I looked up PS2s, that was the number.
I normally play pretty nice, but you said ridiculous, so...
You got me to look at the battery in more depth, too. Oddyssey PC680 is about 13 lb., if I remember right.
Stock Small Battery - 21.1lbs
Stock Replacement Battery - 37lbs
So you're looking at either 8 lb or a massive 24 lb. off the nose. Not recommended if you have winter, though.
02-16-2008, 01:09 PM
#32
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My mistake, I was only looking at weights for 18's via Wheelweights.net. I didn't bother looking at 17's like a fool.
The battery is nice... but I fall into the winter category. My car is under a bunch of snow at the moment.
The battery is nice... but I fall into the winter category. My car is under a bunch of snow at the moment.
02-16-2008, 02:34 PM
#35
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lol not really... Get "owned" by people who enjoy their best part of their day by E-owning other people makes me laugh harder than it actually makes me upset.
Besides I got my new shift boot and it's sunny for once. Not having a bad day at all!
Besides I got my new shift boot and it's sunny for once. Not having a bad day at all!
02-16-2008, 02:38 PM
#36
The Professor
Went back to Weight of Stock RX8 Parts to review. There are apparently two different stock wheel manufacturers.
LM= U-Mold >>21.5 lb.
H= Hitachi >>22.5 lb.
If you believe Tire Rack weights, then
Kosei K1-TS 17x8 +45et $199 >>15.4 lb.
MOTEGI TRACK TRAKLITE 17x8 +45et $288 >>15.0 lb.
MOTEGI TRACK TRAKLITE 2.0 17x8 +45et $288 >>14.6 lb.
Enkei Racing RPF1 17x9 +45et $250 >>15.5 lb.
So you'll be looking at 6 to 8 lbs savings depending on which stock wheels you have and which wheels you end up choosing. No forged mag necessary.
And you'll probably end up saving about 2 lb. with a 235/40-17 compared to the same model of 225/45-18. I looked up PS2s, that was the number.
I normally play pretty nice, but you said ridiculous, so...
You got me to look at the battery in more depth, too. Oddyssey PC680 is about 13 lb., if I remember right.
Stock Small Battery - 21.1lbs
Stock Replacement Battery - 37lbs
So you're looking at either 8 lb or a massive 24 lb. off the nose. Not recommended if you have winter, though.
LM= U-Mold >>21.5 lb.
H= Hitachi >>22.5 lb.
If you believe Tire Rack weights, then
Kosei K1-TS 17x8 +45et $199 >>15.4 lb.
MOTEGI TRACK TRAKLITE 17x8 +45et $288 >>15.0 lb.
MOTEGI TRACK TRAKLITE 2.0 17x8 +45et $288 >>14.6 lb.
Enkei Racing RPF1 17x9 +45et $250 >>15.5 lb.
So you'll be looking at 6 to 8 lbs savings depending on which stock wheels you have and which wheels you end up choosing. No forged mag necessary.
And you'll probably end up saving about 2 lb. with a 235/40-17 compared to the same model of 225/45-18. I looked up PS2s, that was the number.
I normally play pretty nice, but you said ridiculous, so...
You got me to look at the battery in more depth, too. Oddyssey PC680 is about 13 lb., if I remember right.
Stock Small Battery - 21.1lbs
Stock Replacement Battery - 37lbs
So you're looking at either 8 lb or a massive 24 lb. off the nose. Not recommended if you have winter, though.
02-17-2008, 01:03 AM
#39
The Professor
There are 3 categories of weight=
unsprung weight = shocks, brake calipers, brake pads, brake lines.
sprung weight = the car and anything that rests on the springs
rotational weight = brake rotors, engine rotors, pulley, flywheel, clutch, transmission, driveshaft, final drive gear, wheels, tires.
02-23-2008, 09:05 PM
#42
Registered
Missing option?
So after doing search after search i have decided to start a thread hoping to get the answers i am looking for. I am looking for solid, proven ways to increase acceleration without going FI, too much to maintain, i already know about intake, exhaust and flywheel, but what else out there has been proven????
The Navy uses a steam cat.....
Seriously, you forgot gearing, Mazda is dropping down to a 4.77 this year.
Lower, wider tires would help a small amount.
02-23-2008, 09:53 PM
#43
Momentum Keeps Me Going
Unfortunately this is not true for the most part. Try going to 275/35/18 for example on whatever wheel (9" or 9.5" would be appropriate). You'll not only NOT accelerate as fast, but your top speed will drop due to additional friction (air/tire). Even if you get nice lightweigh wheels...
02-24-2008, 09:01 AM
#44
Registered
Unfortunately this is not true for the most part. Try going to 275/35/18 for example on whatever wheel (9" or 9.5" would be appropriate). You'll not only NOT accelerate as fast, but your top speed will drop due to additional friction (air/tire). Even if you get nice lightweigh wheels...
Uh, the stock tires are 225/45 18; a 225/45 16(?) would be "smaller" and lower the effective gear ratio.
I guess the steam cat is not really an option.....
02-24-2008, 12:58 PM
#47
I'll snap his neck.
Unfortunatley we'd have to beef up the front suspension quite a bit to use the steam cat method
The 4.77 gear does help some. Not an enormous amount, but it does help some.
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