I heard that it could produce a bog effect off the line and actually makes you SLOWER in the 1/4 mile. Is it good for the 1/4 mile? Anyone dynoed the gains? How much is it worth down that quarter? 0.1? 0.2 seconds?

How 'bout this? http://www.vqpower.com/v2/article-print-19.html

Never heard of it, only the unortodox UDP. This one is a supercharger-type pulley I think. Anyone Try one of those?

Are there any other kinds of light flywheels/pulleys out there?

 

Given the physics of it, the gains would be diminishing as you go up through the gears. I read somewhere that an average lightweight flywheel on a car geared in the average manner gives gains along these lines. It's equivalent to removing 300lbs from the car in first gear, 200ish in 2nd, 100 in 3rd, etc. If I still remembered my highschool and college physics I could calculate it for the maxima but I don't.

 

Thanks Neal. My gut tells me it must be a ***** to launch with a 5-speed. -->300pounds less in 1st + 3.5 block = too much torque

 

The problem with the flywheel is that you loose a lot of rotational inertia and it makes launching a bit hard because the motor is far more prone to bogging. Gear heads would never recommend a light flywheel for drag racing. The light flywheels are more for road racing where you want to hang the revs high with minimal drops in rpm when you're shifting.

 

I have had the fidanza for the last year. I may be taking it out and going back to stock over the winter when I replace my clutch. It does make it a bit more tricky to launch. Not that good 60' can't be had with one, it just makes it a little harder to be consistant. I did pull a best 2.14 60' on street tires with the fidanza. It does make down shifts more fun.


Gains? I really doubt there are any thing measureable

 

That is very interesting.
Ok, so could you average the # of lbs subtracted from 1st to 3rd gear and calculate that into the 1/4 mile?
Well then again I guess it would depend on which gear you spend the most time in(3rd) compared to which gear you accelerate the most in(1st)?

 

i got one from unorthodox and it is a little trickier to launch. i think w/ slicks it would deffinetly improve your 1/4 mile time because the biggest problem i am having is spinning tire. i mean if i am in first gear w/ the clutch completely out and punch it...as soon as it hits about 3grand it starts spinning tire because it accelerates so much faster. thats the biggest diffrence i have noticed. i like mine and am glad i did this mod.

 

Larry; did it improve you 1/4 mile times significantly?

What kind/size of wheels and tires are you running?

Anybody else tried the one from unorthodox?

 

it only took about .05 off my quarte mile time but i think it would have taken at least .2 off if i could get some traction. thats why i need to use slicks.

 

so what's the verdict on this?

what if I live in socal and am in stop and go heavy traffic all the time....should I stick with my stock flywheel?

anyone have any videos to show how fast your tach revs with a lightened flywheel?

 

so do you guys think it is worth it?

 

NA mod's that, IMO, I probably would not have done if I were to go back and do it again were the findanza flywheel and Cattman headers. Not so much that I did not like the mods, but for the $1100 I spend on those mods I could have done other stuff more worth while.

 

I have had the findanza in for 6 mos., and it takes some getting used to. Have yet to go to a track, but have launched off stop lights. It is a little more difficult, a lot of that probably has to do with the heavier stage I ACT. It does spool faster, but you need to up-shift quickly. If you take your time, it will bog a little quicker than normal...but if you are racing you wouldn't be granny shifting anyways. The biggest difference in my car is letting the clutch out and then laying into the accelerator...no matter how dry, tires will break contact as it revs and goes past 20 mph. It didn't do that before. It's also nice when you are keeping it in second or third, much better response. This is what I have noticed. I think if you up-shift quickly, it should be quicker in the 1/4, but the launches can be tricky.