Flywheel Weight Recommendation
Thread Starter
Drifting
Joined: Oct 2012
Posts: 1,524
Likes: 61
From: Medina Ohio
Flywheel Weight Recommendation
OK, so I've done my research and have been browsing over several threads for the past few days. I still cannot make a decision and it seems to really be back-and-forth on opinions.
Car is in the build phase and never been on the road, so I have nothing to compare too.
357 cu. in. (.040 over) Weiand 142 mini blower, TKO-600 trans. (.82), 3.36 rear gear (may change in the future). Leaning towards a 218 intake 230 exhaust @ .050 cam on a 113 lobe separation. Either 1 step smaller or larger, but you get the generally idea. 27" tire - 19 x 10.
Fun street car is the theme.
Would you do a lightweight wheel, or stick to something a little heavier?
Car is in the build phase and never been on the road, so I have nothing to compare too.
357 cu. in. (.040 over) Weiand 142 mini blower, TKO-600 trans. (.82), 3.36 rear gear (may change in the future). Leaning towards a 218 intake 230 exhaust @ .050 cam on a 113 lobe separation. Either 1 step smaller or larger, but you get the generally idea. 27" tire - 19 x 10.
Fun street car is the theme.
Would you do a lightweight wheel, or stick to something a little heavier?
Safety Car
Joined: Mar 2007
Posts: 3,652
Likes: 49
From: Bridgewater nj
IMO it's not needed. If it was a small 327 with all out race trim than I would do it. With a blower, you won't even notice a difference.
Sounds like a fun ride
be cautious on the cam overlap with the blower. Too much may cause idle problems and backfires thru the huffer is not a good thing.
Sounds like a fun ride
be cautious on the cam overlap with the blower. Too much may cause idle problems and backfires thru the huffer is not a good thing.
Thread Starter
Drifting
Joined: Oct 2012
Posts: 1,524
Likes: 61
From: Medina Ohio
IMO it's not needed. If it was a small 327 with all out race trim than I would do it. With a blower, you won't even notice a difference.
Sounds like a fun ride be cautious on the cam overlap with the blower. Too much may cause idle problems and backfires thru the huffer is not a good thing.
Sounds like a fun ride
be cautious on the cam overlap with the blower. Too much may cause idle problems and backfires thru the huffer is not a good thing.
Are you saying to do something light?I've seen 15lb, 18lb, 20-22lb, 25lb, 30+...
Reference the cam, been looking at comps nitrous cams and blower cams. Haven't looked too much at the others yet. The one I referenced is the nitrous NX262. You think the 12 degrees is too much? The NX256 is 212/222 @ .050. I should probably leave this to another thread, because cam selection is still up in the air.
Last edited by Ibanez540r; Jul 15, 2014 at 06:42 PM.
Le Mans Master
Joined: Apr 2007
Posts: 7,353
Likes: 72
From: Graceland in a Not Correctly Restored Stingray
Noting that I'm substantially more AX/RR oriented today than during my drag racing days gone by, over the years I've run progressively lighter flywheels behind a succession of fairly stout 427 BBs in my shark, with my favorite setup, so far, having been 15# (SFI, of course). It is with that experience in mind that IMCO heavy flywheels are best left to under-powered/over-tired cars and/or to those who either don't know or don't care to learn how to shift (up and down) with the proficiency required to take full advantage of having lower flywheel inertia. YMMV
Yes, do keep your LSA to the wider side not only for the backfire issue, but also so that you don't loose too much boost due to excess short-circuiting during overlap.
Yes, do keep your LSA to the wider side not only for the backfire issue, but also so that you don't loose too much boost due to excess short-circuiting during overlap.
Last edited by TheSkunkWorks; Jul 15, 2014 at 11:06 PM.
Thread Starter
Drifting
Joined: Oct 2012
Posts: 1,524
Likes: 61
From: Medina Ohio
^ Thanks for the input.
I guess that's where my hesitation was coming from.. It seemed like a lot in favor had some pretty big cu. in. built motors with some low gears. I know the blower will really help out, but wasn't sure how my smaller motor with taller gears would be.
Found a guy local that has this... (for a good price)
http://www.summitracing.com/parts/ram-2501
He put it in for 10mi. or less and didn't like it in his 55 chevy.
Thinking I should probably pick it up.
I guess that's where my hesitation was coming from.. It seemed like a lot in favor had some pretty big cu. in. built motors with some low gears. I know the blower will really help out, but wasn't sure how my smaller motor with taller gears would be.
Found a guy local that has this... (for a good price)
http://www.summitracing.com/parts/ram-2501
He put it in for 10mi. or less and didn't like it in his 55 chevy.
Thinking I should probably pick it up.
Le Mans Master
Joined: Apr 2007
Posts: 7,353
Likes: 72
From: Graceland in a Not Correctly Restored Stingray
The blown pump-gas SB C3 I've driven certainly didn't need the extra momentum of a heavier flywheel. 
FWIW, I think many people just don't put enough time and effort into adapting to the quicker RPM response time before they give up, but it does require more attention and precision to master. Oh, and I'm thinking it might be a good idea to think about a limiter.
FWIW, I think many people just don't put enough time and effort into adapting to the quicker RPM response time before they give up, but it does require more attention and precision to master. Oh, and I'm thinking it might be a good idea to think about a limiter.
Last edited by TheSkunkWorks; Jul 15, 2014 at 11:42 PM.
Race Director
Joined: Jan 2000
Posts: 12,399
Likes: 247
From: San Jose CA
I really like my billet steel flywheel. ~20#
That said, I haven't driven a lighter flywheel than that in a while. I didn't enjoy it the last time I did, but I was much less proficient at driving then...
That said, I haven't driven a lighter flywheel than that in a while. I didn't enjoy it the last time I did, but I was much less proficient at driving then...
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Thread Starter
Drifting
Joined: Oct 2012
Posts: 1,524
Likes: 61
From: Medina Ohio
Safety Car
Joined: May 2004
Posts: 4,366
Likes: 1,589
From: los altos hills california
Besides the power gain from a lightweight flywheel and pressure plate, it is pure fun to blip the throttle and have the rotating mass spin up right now! Just what you said you wanted - a fun street car.
Last edited by ignatz; Jul 16, 2014 at 09:01 PM. Reason: add fun
Drifting
Joined: May 2005
Posts: 1,968
Likes: 44
From: East TN
Safety Car
Joined: Mar 2007
Posts: 3,652
Likes: 49
From: Bridgewater nj
IMO it's not needed. If it was a small 327 with all out race trim than I would do it. With a blower, you won't even notice a difference.
Sounds like a fun ride be cautious on the cam overlap with the blower. Too much may cause idle problems and backfires thru the huffer is not a good thing.
Sounds like a fun ride
be cautious on the cam overlap with the blower. Too much may cause idle problems and backfires thru the huffer is not a good thing.
Race Director
Joined: Jan 2000
Posts: 12,399
Likes: 247
From: San Jose CA
When I'm driving around in my Cayman S, downshifting is effortless as the motor is responsive and the clutch predictable.
I find my billet steel flywheel to be very responsive but still be more streetable like a heavy iron flywheel.
Thread Starter
Drifting
Joined: Oct 2012
Posts: 1,524
Likes: 61
From: Medina Ohio
Thanks everyone.
I picked up that Ram Billet Aluminum 18# for $200. Guy put it on his car, drove around the block - hated it - and took it off.
http://www.summitracing.com/parts/ram-2501
I picked up that Ram Billet Aluminum 18# for $200. Guy put it on his car, drove around the block - hated it - and took it off.
http://www.summitracing.com/parts/ram-2501