Alright guys got a question for ya. I think it might be opinion, but if there's some facts great. Which flywheel is better for boost applications. I had a 7.5 fidanza, but the threads pulled out of it so I went back to the stocker. The car seems to be a little better at top end and a lot easier to control. What's better, opinon or fact either way, Lightweight or Stock.
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4 Cams...32 Valves...5 Liters...This Could Get Fun!
i always thought for turbo you wanted more rotating mass for the reason of helping keep the rpms up longer to help prevent lag. but thats just the reasoning in my head.
me persoanlly, I'm sticking with a stock flywheel with a upgraded clutch and having it balanced to the pressure plate along with the rest of the motor.
Back to stock flywheel. Worked well on a stock motor with S/C and my Fidanza broke.
I think everyone needs to look at Speedracers dyno numbers.
he has a lightweight flywheel.
Darkstars wrote:me persoanlly, I'm sticking with a stock flywheel with a upgraded clutch and having it balanced to the pressure plate along with the rest of the motor.
That is what I did as well.
FORGET GIRLS GONE WILD WE HAVE GOVERNMENT SPENDING GONE WILD!
Yes I've seen both Brian's and Fetter's numbers, but what would they have been with a stock flyweel? Could they have been more? I'm kinda lookin for anyone who has done a before and after dyno with the stock vs. light weight.
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4 Cams...32 Valves...5 Liters...This Could Get Fun!
^^well i cant see how thier numbers would be lower with a stock flywheel...it is a fact that the less rotational mass the less power is robbed trying to turn it. Just a for instance...gm dynod a 8 hp gain from going to the neutral shaft balance shafts...loss of rotational mass..frees up power..period..but it you might lose revs on a slow shift..
those are the facts I've been lookin for thanks. Looks like the 7.5 goes back in. Thank you
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4 Cams...32 Valves...5 Liters...This Could Get Fun!
Looks like this is more opinion than anything. Huh who'd of guessed that. Thanks again guys for the input.
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4 Cams...32 Valves...5 Liters...This Could Get Fun!
Power shifting any one?
When in doupt, grub.
well..if you dont kow for sure just google info regarding reducing rotating mass....that should paint a better picture..phil
The lightweight is goin back in w/ the built motor, just gotta get new friction plate and heli coil it.
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4 Cams...32 Valves...5 Liters...This Could Get Fun!
Stock FTMFW
I have 2 friction plates sitting around for the Fidanzacrap flywheel for the 2.4L.
It's more opinion, as others have said, but in
MY opinion, a lightweight flywheel is better for the simple fact that you rev-up a helluva lot quicker. I have both the Fidanza flywhel, and the RKSport underdrive pulley. When boost hits in my car, it really
HITS!!! On 7psi cruisin about 55mph in 5th, I can downshift to 3rd and it will break the tires loose. Granted, it's not much more than a chirp, but it happens.
It also depends on what you want from your car. If you are looking for a daily driver with overall decent driveability with only an occasional flogging, then a stock flywheel would probably suffice. A more race oriented setup with the lightweight flywheel will work if it is a daily driver, but the car will be more "peaky", as you can quickly go from almost stalling the car to burning asphault through a red light.
I happen to like that "peaky" on edge aspect.
Also, anytime you are boosting, I would recommend a clutch upgrade as well. If you go with the lighter flywheel, I would suggest something along the lines of a Centerforce DualFriction stage 2, or a Spec Stage 2. I personally use the Centerforce, but either one should be adequate. Being a sprung-hub design, they offer a stock-like feel, and tend to not have the "off-on" characteristic of higher stage clutches, making them easier to drive in alot of stop-and-go traffic.
As far as drag-racing, in a boosted car, you should have no problems with bogging down with a lighter flywheel if you launch above 2,500 RPMs. When I last drag raced at National Trail, I was doing nothing but spinning off the line launching at 3K, and I spun the whole way down the track as well, trapping a 14.3@104mph, lol. And if anyone is concerned about falling revs while shifting, then you'd better learn how to drive your car.
Currently #4 in Ecotec Forced Induction horsepower ratings. 505.8 WHP 414WTQ!!!
Currently 3rd quickest Ecotec on the .org - 10.949 @ 131.50 MPH!!!
It's gonna be more of a racer, I've already got a stage 3 spec and I had the lightweight flywheel. I loved it, and will be puttin it back in decision made. Thanks guys for the input. It's greatly appreciated.
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4 Cams...32 Valves...5 Liters...This Could Get Fun!
I loved having a LWFW everyday driving, but for me it was hard as hell to launch consistently at the strip.
Once you put that set-up in your car let me know how you like it. I am due for a new clutch, and might as well do a flywheel while I'm at it.
I loved the stage 3 w/ the fidanza, I had a lightweight. If you read my original post I think I said it. As for launcing piece o cake, got 2 step through my msd it was friggin sweet could hold it right at 2500, with nothin more than a chirp then she was gone
. Same thing w/ the stocker only don't gotta shift as fast to keep the revs up but that's been mentioned.
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4 Cams...32 Valves...5 Liters...This Could Get Fun!
right now im running stock on stock in my car... boooo... but once the clutch is done im going with a stage 3 maybe a stage 4 with a lightened flywheel.
We have a spec stage 4 in our cobalt and it still feels 90% like stock and also a fidanza 7.5lb flywheel. the only time u notice it is if your not used to it, and starting from a stop just a hair harder to do smoothly over stock. but over all i didnt notice a huge difference in it... which we were shocked. i personally like the feel of the car being more rough/unlike stock. i barely noticed much of a difference with the flywheel either. maybe revved a lil quicker, but the cobalt revved pretty quick as it was so i think that it would make more of an impact on my cavalier.
