like title says need to know the weight of the stock flywheel. And what weight would be the best? Does anyone know how much a light weight one would benefit?

 

a lighter one will make starting a tad easier and you can rev the motor quicker. the light ones are about 7-9 ish pounds. but you can get some high performance CF ones stock is about 15 maybe.

 

The one I was looking at getting is 11lbs. Would 4lbs make that much of a difference?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by brent_si &raquo;</TD></TR><TR><TD CLASS="quote">The one I was looking at getting is 11lbs. Would 4lbs make that much of a difference?</TD></TR></TABLE>

Stock should be around 17-18lbs from what i know.
11 lbs will make a nice difference.
Theres pro's and con's when it comes to different weights, but most ppl will tell you 11-12 lbs is a nice middle of the road weight.

 

could you give me some example of positives and negatives? I am really wanting to increase tq on my b16 without turning to boost any suggestions? Any info would be appreciated.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by brent_si &raquo;</TD></TR><TR><TD CLASS="quote">could you give me some example of positives and negatives? I am really wanting to increase tq on my b16 without turning to boost any suggestions? Any info would be appreciated. </TD></TR></TABLE>

Well, from what i know, if your flywheel is too light, where you gain response in some area's, you lose power in others. You'd have to ask ppl with B16's that have done this.

 

My oem y7 flywheel was ~18lbs as well. I upgraded to an 8.4lb flywheel and have never looked back.

 

did the 8.4lb flywheel gain you tq or just response time and smoother shifts?

 

i have an 11.8 lb flywheel in my si with the b16

I run I/H/E, ctr cams and tune, low end is better responsiveness, still just as easy to drive. Doesn't lose rpms too bad between shifts.

and stock is between 17-18 lbs

 

I also upgraded to a 9Lb Fidanza flywheel and it made an amazing difference. Some say you lose high end, but i couldnt tell ya cause at the same time i went from a DX to an SI tranny, so it was like driving a whole new car.

 

I have a Findanza (9 lbs, i think) on my b16 - its definitley a big difference in shifting and getting the car moving. Shifting is... it just works better, revmatching is easier. Getting the car moving became much less forgiving of poor clutch control - not harder per se, but if you're a little off it just stalls now instead of bogging down or whatnot.

I haven't noticed much difference at all in terms of power/acceleration, and the motor def runs a little less smooth as there's not as much mass to absorb the power strokes, but i'd def keep the flywheel - shifting just works soooo much better now.

 

All i really noticed was better response and a quicker tendency to lose traction in the rain.

I'm glad I bought it. Fidanza makes a quality product for less.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by ek forever guy &raquo;</TD></TR><TR><TD CLASS="quote">All i really noticed was better response and a quicker tendency to lose traction in the rain.</TD></TR></TABLE>

Same... havent tried it in the snow yet... have some concerns regarding that, haha.

 

thanks for all the info guys. I just need more tq cause me friends ser spec-v pulls way harder than my car at low rpm. lmk if their is anything i can do to increase tq without boost.

 

too light of a flywheel will give you less of a jump off the line which in a way is decreasing torque.

 

Think of what a flywheel does. It basically creates momentum to keep the engine running smoothly. Lighter flywheels give you faster response by decreasing the load on the engine allowing it to do work faster (increase horsepower). They also make engine braking easier by giving the brakes less rotational force to overcome.

A couple of the big cons are as follows. The vehicles ability to coast is diminished because once the throttle is closed there is less momentum to keep the vehicle moving. The other is that you cannot accelerate from a standstill as easily because without the momentum the massive load the engine falls under when the clutch is engaged can more easily decelerate the engine. This is not an issue with vehicles that already have lots of low-end torque though, so in that case you might as well have a very light flywheel for its performance advantages in other RPM ranges.

My advice to you is this; you have a B16A(2) engine which means that your 111 pounds of torque is pretty lacking. Therefore find a flywheel in the 11-13lb range for a satisfying compromise. You'll gain some throttle response (can't get enough of that) but still basically maintain the other drivability characteristics. I think Spoon Sports has a really nice one in that weight range for about $250.

And one last random note: Flywheels don't affect torque production at all. The only thing you can do to increase engine torque is to increase the average pressure being created in the cylinder.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Hardedge &raquo;</TD></TR><TR><TD CLASS="quote">Think of what a flywheel does. It basically creates momentum to keep the engine running smoothly. Lighter flywheels give you faster response by decreasing the load on the engine allowing it to do work faster (increase horsepower). They also make engine braking easier by giving the brakes less rotational force to overcome.

A couple of the big cons are as follows. The vehicles ability to coast is diminished because once the throttle is closed there is less momentum to keep the vehicle moving. The other is that you cannot accelerate from a standstill as easily because without the momentum the massive load the engine falls under when the clutch is engaged can more easily decelerate the engine. This is not an issue with vehicles that already have lots of low-end torque though, so in that case you might as well have a very light flywheel for its performance advantages in other RPM ranges.

My advice to you is this; you have a B16A(2) engine which means that your 111 pounds of torque is pretty lacking. Therefore find a flywheel in the 11-13lb range for a satisfying compromise. You'll gain some throttle response (can't get enough of that) but still basically maintain the other drivability characteristics. I think Spoon Sports has a really nice one in that weight range for about $250.

And one last random note: Flywheels don't affect torque production at all. The only thing you can do to increase engine torque is to increase the average pressure being created in the cylinder.</TD></TR></TABLE>

I know a flywheel doesn't increase engine torque, but I think it can increase hp and tq to the wheels by lowering rotational inertia and making the drivetrain more effecient

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by kevo1586 &raquo;</TD></TR><TR><TD CLASS="quote">[/B]

I know a flywheel doesn't increase engine torque, but I think it can increase hp and tq to the wheels by lowering rotational inertia and making the drivetrain more effecient</TD></TR></TABLE>
Your right about that. A flywheel just helps the power the motor has get put down. I installed a 11 Pound flywheel and stage 3 clutch now if i try to launch under 3k it falls flat on its face then picks back up. Also I love it on the highway I dont think I lose any speed between shifts