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New Katech billet aluminum flywheel for LT1/LT4 saves 24lbs
We just released this billet aluminium, direct-replacement flywheel for LT1 and LT4 Corvette and Camaro. I've been testing this in my car for a while now and it works great. The stock flywheel is extremely heavy at 65.5lbs. This flywheel reduces 24.5lbs of rotating mass from the drivetrain which is enough to notice a difference, but not too much to cause drivability issues. Although, tuning may be required and it was in my application. The stock clutch has been working great for us, holding 740rwtq on the chassis dyno, so we wanted to do something that still utilized the amazing factory clutch. The friction plate is steel and rebuildable should you ever need a replacement.
I know i'm bumping an old thread, but has anyone else installed one of these? I had a lightweight flywheel (UUC brand I think?) installed in my first CTSV and loved it. Throttle response was great and the car just felt quicker. That kit also utilized the stock clutch like this one and it didn't make any weird noises. It was definitely quieter than the centerforce setup i had in my 3rd V! Interested in getting one of these for my C7 but curious if anyone else has tried one of these yet.
Also, is this the PN for the OEM clutch? 24255996 It just says pressure plate, but the only other PN i see on the GM parts site is for the oem flywheel
I doubt this could be added without tuning but combined with the Hooker shorty headers would make a great track combo. The shorty headers are 19lbs lighter than stock.
Why does this need a tune? It is not messing with the air to fuel mixture or spark timing. Never hear of needed a tune on other cars for clutch components before. Or is the tune just required on the LT4 since the engine is spinning differently and thus the supercharger is effected. Just curious here.
Jason Harding stated in another thread that tuning may be required and was in his application. Throttle control system.
Be great if he could comment further, 43 lbs total reduction would be huge.
Why does this need a tune? It is not messing with the air to fuel mixture or spark timing. Never hear of needed a tune on other cars for clutch components before. Or is the tune just required on the LT4 since the engine is spinning differently and thus the supercharger is effected. Just curious here.
Since the throttle control is now all torque-based when you change the clutch/flywheel mass you're changing the required torque to keep the engine running. This requires manipulation of these tables to get it to idle correctly, decelerate without stalling, etc.
Yeah this is probably an amazing mod for our cars, especially for manuals (no cylinder deactivation except in eco mode). When my guarantee expires and especially when I need a new clutch, I'll definitely consider adding this, too.
I ordered mine and it is going on my 2015 z51 in the spring, along with a dss carbon driveshaft and LG G2 coilovers. This should flow nicely with the ARH mid length headers, Halltech carbon cai, B & B bullets, Borla x-pipe and NPP and AFM delete and removal. Car should be about 100 lbs lighter and quicker. The dyno showed 465 hp at the wheels.
We've installed a few of these already and they're an awesome upgrade. Clutch feeling stays stock, but the car revs noticeably faster, throttle response is significantly quicker and the engine braking is much better. I can't comment if an otherwise stock car will require tuning, but the ones that we've installed were all on heads/cam builds or utilizing Katech's 427 LT1 engine.
The stock flywheel/clutch assembly looks and feels like it belongs in a dump truck. This weight savings definitely helps that.
I ordered mine and it is going on my 2015 z51 in the spring, along with a dss carbon driveshaft and LG G2 coilovers. This should flow nicely with the ARH mid length headers, Halltech carbon cai, B & B bullets, Borla x-pipe and NPP and AFM delete and removal. Car should be about 100 lbs lighter and quicker. The dyno showed 465 hp at the wheels.
Will a bone stock wet sump Stingray require a tune?
I installed a Fidanza lightweight flywheel in my C6 and also in my C6 SS Camaro and absolutely loved how much quicker they rev'd up. The first day after the install I had to learn to drive it all over again because of how amazing the throttle response was hitting the rev limiter! Absolutely loved it!
Would like to install on in my wet sump C7 Stingray.
Will it require tuning?
Will the stock clutch bolt right up without issues? (no miles on car, so will not be replacing original clutch)
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Last edited by HorsePower Junkie; 03-01-2019 at 07:20 AM.
Will a bone stock wet sump Stingray require a tune?
I installed a Fidanza lightweight flywheel in my C6 and also in my C6 SS Camaro and absolutely loved how much quicker they rev'd up. The first day after the install I had to learn to drive it all over again because of how amazing the throttle response was hitting the rev limiter! Absolutely loved it!
Would like to install on in my wet sump C7 Stingray.
Will it require tuning?
Will the stock clutch bolt right up without issues? (no miles on car, so will not be replacing original clutch)
Jason, had this flywheel installed recently, excellent quality. I do have a question. There is a knocked sound, sort of like a stone being cycled coming from the clutch area. When I press in the clutch pedal the sound stops. My mechanic said it is because the flywheel is not dual mass so this was expected. He said it is not an issue and will not cause any problems. He likened it to a Mantic clutch that has the same noise when the clutch pedal is out. Your thoughts please.
Jason, had this flywheel installed recently, excellent quality. I do have a question. There is a knocked sound, sort of like a stone being cycled coming from the clutch area. When I press in the clutch pedal the sound stops. My mechanic said it is because the flywheel is not dual mass so this was expected. He said it is not an issue and will not cause any problems. He likened it to a Mantic clutch that has the same noise when the clutch pedal is out. Your thoughts please.
It sounds like you're describing normal torque tube noise.
07-26-2017, 12:22 PM
New Katech billet aluminum flywheel for LT1/LT4 saves 24lbs
