*_ Fairfield Barnes & Noble/ Travis AFB Weekly Meet_*
09-18-2007 | 08:48 PM
#5028
Registered User
iTrader: (5)
Joined: Apr 2007
Posts: 1,662
From: Sebastopol, CA
Car Info: '04 PSM Sti
[QUOTE=TronWeRX;1982128]yea you guys and Gals usually keep the bugeye count on lock. i havent been for a while with all the family b-days and Vegas and what not, but the Twinkie and I should probably be out on friday to rep the bugs, Blaze it up a little (talkin about the yellow people, for those of you thinkin otherwise. Mary Jane and i don't get along) 
oh and when i do my clutch im'a do a tranny & diff. drain and fill. any recommendations on good fluids? i was lookin at GM syncromesh, or some of these cocktails out there. CHIME IN
________
Pissing asian
oh and when i do my clutch im'a do a tranny & diff. drain and fill. any recommendations on good fluids? i was lookin at GM syncromesh, or some of these cocktails out there. CHIME IN
Registered User
iTrader: (25)
Joined: Jan 2005
Posts: 12,775
From: Kansas - BAIC 4 LIFE!
Car Info: 04 Forester XT/96 Brighton Project
[QUOTE=crfsti;1982206]
it would! I think steven may have my old findanza if he hasn't gotten rid of it already. I took it out since it would cause misfire CEL on banks 3&4 iirc or 2&4...eitherway I got sick of it and didn't care so I took it out and put a stock one back in. It was okay when it was in the car (came with the car.) Revved up nicer and a bit quicker.
yea you guys and Gals usually keep the bugeye count on lock. i havent been for a while with all the family b-days and Vegas and what not, but the Twinkie and I should probably be out on friday to rep the bugs, Blaze it up a little (talkin about the yellow people, for those of you thinkin otherwise. Mary Jane and i don't get along)
oh and when i do my clutch im'a do a tranny & diff. drain and fill. any recommendations on good fluids? i was lookin at GM syncromesh, or some of these cocktails out there. CHIME IN
Registered User
iTrader: (11)
Joined: Apr 2005
Posts: 3,863
From: Land Of The Dead
Car Info: Cage and Slicks and Wing OH MY!!
im sure tristan knows all abouit lightweight flywheels, from our honda days =)
7 lb flywheels are insane!!!!
oh yeah, chris,
this crazy bastard child at the skatepark wanted to die, so he puts a 4 foot cement extension at the big bowl and feeble stalls it, WTF IS HE THIN KING!!!!
COME SKATE MORE!!!!!
7 lb flywheels are insane!!!!
oh yeah, chris,
this crazy bastard child at the skatepark wanted to die, so he puts a 4 foot cement extension at the big bowl and feeble stalls it, WTF IS HE THIN KING!!!!
COME SKATE MORE!!!!!
09-19-2007 | 01:55 AM
#5031
Registered User
iTrader: (2)
Joined: Apr 2007
Posts: 213
From: Nor-cal, The Burbs
Car Info: 2002 WRX
right on rick, thanks for the info man! taylor i will be sure to let you know. it can be a little install day! =) and chris, yea i was lookin at flywheels too cause i'm way too lazy to take it all back out again to put a flywheel in later down the line when i coulda done it the first time. eric you know me too well. i think almost every honda i had was equipped with some lightened flywheel. all my D-series swaps i just carried it over ( except mine was an 11-pounder). my integra wit the b16 had one too but i dunno the weight, was istalled when purchased. damn man, when my bro andrew had that eg hatch and we swapped that 2nd-gen jdm b16 wit LSD and lightweight flywheel in, it was mashin! damn i miss those days stop reminding me. i wish he never sold that 
09-19-2007 | 02:00 AM
#5032
Registered User
iTrader: (2)
Joined: Apr 2007
Posts: 213
From: Nor-cal, The Burbs
Car Info: 2002 WRX
it would! I think steven may have my old findanza if he hasn't gotten rid of it already. I took it out since it would cause misfire CEL on banks 3&4 iirc or 2&4...eitherway I got sick of it and didn't care so I took it out and put a stock one back in. It was okay when it was in the car (came with the car.) Revved up nicer and a bit quicker.
but if ur readin steven... you still got it? just curious
09-19-2007 | 06:23 AM
#5034
Registered User
iTrader: (25)
Joined: Jan 2005
Posts: 12,775
From: Kansas - BAIC 4 LIFE!
Car Info: 04 Forester XT/96 Brighton Project
Originally Posted by Naziock
Flywheel FAQ
How does a lightweight flywheel improve performance?
A transmission can be thought of as a fulcrum and lever in a car. First gear has a really long lever; second gear has a shorter lever, etc. The lever represents the mechanical advantage that gears give your vehicle. When your car is moving, you have two factors that are present during acceleration, one is driveline losses, which are constant and the variable, which is vehicle weight and the mechanical advantage supplied by each gear. While changing to a lighter flywheel will give the user little to no changes on a dyno, the apparent changes are quite dramatic due to the greater mechanical advantage. Consider these made up figures for consideration: Drive line losses, 45 pounds and vehicle mass (weight) at the driveline (remember your gear's mechanical advantage reduces your actual car weight). We know that within reason, vehicle mass is a constant. Now imagine if you reduced the driveline loss from 45 to 35 with the use of a lightweight flywheel. Since the engine has less drivetrain losses to compensate for, this means the "gained" horsepower can be applied to moving the vehicle mass. Using mathematics, one can realize that the higher you go up in gears, the less effect that a lightened flywheel will have to the overall equation.
How much will a lightweight flywheel affect my car's performance?
This Excel document will allow you to find out for your WRX or STi application.
Are there any downsides to a lightweight flywheel?
While the performance characteristics of a lightweight flywheel seem to be the perfect solution, there are compromises:
a. Low end performance is affected. This usually means that higher revs are necessary for smooth starts due to the reduced rotational mass. For drag racers, this can be a BIG issue.
b. Possible missfire check engine light.
What causes a missfire CEL with lightweight flywheels?
No one is really sure. There are theories though. One theory is that the Crank Position Sensor senses the rotational speed of your crankshaft. Since a lightweight flywheel reduces the rotation mass of your engine, your crankshaft accelerates and decelerates quicker than OEM specifications. Another theory is that there is a missmatch of information from your Crank Position Sensor and the Cam Position Sensor during acceleration and deceleration. This may or may not be caused by the slow reaction of the belt tensioner which will cause enough belt slop to give erroneous readings to the ECU. Since missfire CELs (due to lightweight flywheels) do not occur as often on the STi and the STi has two Cam Position Sensors, this adds further evidence that the missfire CEL has something to do with the Cam Position Sensor since there is only one on the WRX.
Which lightweight flywheel will not throw a missfire CEL?
In truth, there is no lightweight flywheel that will not throw a missfire CEL. The odds of you throwing a missfire CEL are higher the lower in flywheel weight you go. Even with a “heavier” lightweight flywheel, you may throw a missfire CEL.
Will the use of a lightweight pulley increase my chances of a missfire CEL with a lightweight flywheel?
Yes. To a smaller degree, lightweight pulleys also decrease rotation mass, adding their quicker acceleration and deceleration into the equation.
How do I fix a missfire CEL with a lightweight flywheel?
The safest course of action is to use a portable OBDII code instrument and clear the codes frequently. Once you know the frequency of the missfire CELs, it will aid you in determining if this is an actual code or perhaps something to investigate further. While the missfire CEL code is a "safe code" (just an indicator and won't throw your car into safe or limp mode), it is never a good idea to drive around with the CEL on for extended periods of time as another, more serious code can be present without your knowledge. Additionally, it is not a wise idea to remove the missfire CELs via engine management software. Missfire codes can be an indication of a problem and removing their presence will remove possible symptoms of an actual problem.
Who is a good or a bad candidate for a lightweight flywheel?
Arguably, the users whose driving technique is most highlighted by the benefits of a lightweight flywheel are people who autocross frequently. Many people are also genuinely happy with the performance increase in their daily driven vehicles as well. The only group that is generally dissatisfied are people who competitively drag race as the reduced rotational mass does not lend itself to their severe launch techniques.
How does a lightweight flywheel improve performance?
A transmission can be thought of as a fulcrum and lever in a car. First gear has a really long lever; second gear has a shorter lever, etc. The lever represents the mechanical advantage that gears give your vehicle. When your car is moving, you have two factors that are present during acceleration, one is driveline losses, which are constant and the variable, which is vehicle weight and the mechanical advantage supplied by each gear. While changing to a lighter flywheel will give the user little to no changes on a dyno, the apparent changes are quite dramatic due to the greater mechanical advantage. Consider these made up figures for consideration: Drive line losses, 45 pounds and vehicle mass (weight) at the driveline (remember your gear's mechanical advantage reduces your actual car weight). We know that within reason, vehicle mass is a constant. Now imagine if you reduced the driveline loss from 45 to 35 with the use of a lightweight flywheel. Since the engine has less drivetrain losses to compensate for, this means the "gained" horsepower can be applied to moving the vehicle mass. Using mathematics, one can realize that the higher you go up in gears, the less effect that a lightened flywheel will have to the overall equation.
How much will a lightweight flywheel affect my car's performance?
This Excel document will allow you to find out for your WRX or STi application.
Are there any downsides to a lightweight flywheel?
While the performance characteristics of a lightweight flywheel seem to be the perfect solution, there are compromises:
a. Low end performance is affected. This usually means that higher revs are necessary for smooth starts due to the reduced rotational mass. For drag racers, this can be a BIG issue.
b. Possible missfire check engine light.
What causes a missfire CEL with lightweight flywheels?
No one is really sure. There are theories though. One theory is that the Crank Position Sensor senses the rotational speed of your crankshaft. Since a lightweight flywheel reduces the rotation mass of your engine, your crankshaft accelerates and decelerates quicker than OEM specifications. Another theory is that there is a missmatch of information from your Crank Position Sensor and the Cam Position Sensor during acceleration and deceleration. This may or may not be caused by the slow reaction of the belt tensioner which will cause enough belt slop to give erroneous readings to the ECU. Since missfire CELs (due to lightweight flywheels) do not occur as often on the STi and the STi has two Cam Position Sensors, this adds further evidence that the missfire CEL has something to do with the Cam Position Sensor since there is only one on the WRX.
Which lightweight flywheel will not throw a missfire CEL?
In truth, there is no lightweight flywheel that will not throw a missfire CEL. The odds of you throwing a missfire CEL are higher the lower in flywheel weight you go. Even with a “heavier” lightweight flywheel, you may throw a missfire CEL.
Will the use of a lightweight pulley increase my chances of a missfire CEL with a lightweight flywheel?
Yes. To a smaller degree, lightweight pulleys also decrease rotation mass, adding their quicker acceleration and deceleration into the equation.
How do I fix a missfire CEL with a lightweight flywheel?
The safest course of action is to use a portable OBDII code instrument and clear the codes frequently. Once you know the frequency of the missfire CELs, it will aid you in determining if this is an actual code or perhaps something to investigate further. While the missfire CEL code is a "safe code" (just an indicator and won't throw your car into safe or limp mode), it is never a good idea to drive around with the CEL on for extended periods of time as another, more serious code can be present without your knowledge. Additionally, it is not a wise idea to remove the missfire CELs via engine management software. Missfire codes can be an indication of a problem and removing their presence will remove possible symptoms of an actual problem.
Who is a good or a bad candidate for a lightweight flywheel?
Arguably, the users whose driving technique is most highlighted by the benefits of a lightweight flywheel are people who autocross frequently. Many people are also genuinely happy with the performance increase in their daily driven vehicles as well. The only group that is generally dissatisfied are people who competitively drag race as the reduced rotational mass does not lend itself to their severe launch techniques.
Last edited by Hatteroo; 09-19-2007 at 06:26 AM.
09-19-2007 | 07:06 AM
#5035
Registered User
iTrader: (25)
Joined: Jan 2005
Posts: 12,775
From: Kansas - BAIC 4 LIFE!
Car Info: 04 Forester XT/96 Brighton Project
While I'm post whorin' it up...
Anyone have a portable dvd player they're willing to let me borrow on this saturday? I just need it for 8hrs.....
Anyone have a portable dvd player they're willing to let me borrow on this saturday? I just need it for 8hrs.....
09-19-2007 | 02:27 PM
#5037
Registered User
Joined: Nov 2005
Posts: 754
From: Cali Child - FFBN...
Car Info: SRP Bugeye
okay, i think im missing something (or everything) \
steven/jon: whats up for sunday? yes i'm off, but i dont know whats going on.
cal: there is always a bugeye there. except for the past two weeks and this week becuase my breaks are f'd.
ricky: why are you such a *****? (a post ***** that is)
someone explain?!
steven/jon: whats up for sunday? yes i'm off, but i dont know whats going on.
cal: there is always a bugeye there. except for the past two weeks and this week becuase my breaks are f'd.
ricky: why are you such a *****? (a post ***** that is)
someone explain?!
09-19-2007 | 07:05 PM
#5040