 using larger (Dia.) wheels/tires, rotating mass effects |
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| Tom |
 Apr 28 2010, 09:30 AM
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Advanced Member  Group: Members Posts: 2,139 Joined: 21-August 05 From: Port Orchard, WA 98367 Member No.: 4,626 Region Association: None  |
Have we ever discussed the effects of changing the wheel/tire sizes and the effects on acceleration, both in starting and stopping? I ended up using 195/55/15's on mine and I noticed that the speedo was off about 10% and I expected that and because the overall diameter was smaller, i thought acceleration would be affected slightly also. What I didn't take into account was the rotating mass effect. So, I guess my starting and stopping both have been slightly improved, maybe handling is improved slightly also.
Link to some info: http://www.the-welters.com/racing/rotational.html I some times wonder how those pickups with 22" wheels brake in an emergency! Tom |
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| Mike Bellis |
Apr 28 2010, 06:33 PM
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Resident Electrician Group: Members Posts: 8,345 Joined: 22-June 09 From: Midlothian TX Member No.: 10,496 Region Association: None 
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I switched from 205/50/15's in the rear to 245/45/16's. I did not notice any change in start/stop. Could be my car...
Car: 73 914 Chevy V8 Tranny regeared for V8 930 Turbo brakes (all 4) As far as SUV's with 22's; The biggest mistake those guys make it not upgrading the brakes. With all that extra rotating mass, they will go through brake parts way too fast and never be able to stop as quickly. |
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Posts in this topic
Tom using larger (Dia.) wheels/tires Apr 28 2010, 09:30 AM
Tom I see I didn't get the link right, sorry- my ... Apr 28 2010, 03:18 PM RJMII That's some pretty interesting reading. I... Apr 28 2010, 03:29 PM SirAndy Fixed the link ...
:wavebye: Andy Apr 28 2010, 03:40 PM charliew I have some hollow spoke big 11j18 tt wheels with ... Apr 28 2010, 03:42 PM Tom Sure got me to thinking why the 914-6 came with 14... Apr 28 2010, 03:50 PM charliew Maybe I can blame not paying attention to some loo... Apr 28 2010, 04:01 PM Rotary'14 I just read some stuff about this very subject tod... Apr 28 2010, 04:28 PM Tom Thanks Rob, That is why I started this thread, so... Apr 28 2010, 05:22 PM charliew I had 20's on my harley ford truck and I'm... Apr 28 2010, 11:31 PM Tom Reading the info on post #8, maybe there is not t... Apr 29 2010, 08:46 PM GeorgeRud I think that Porsche used the 14" wheels on t... Apr 29 2010, 08:53 PM Porcharu I'm pretty sure that the popular 'inertia ... Apr 29 2010, 09:19 PM
strawman Several years ago, I built my '85 Toyota MR2 S... Apr 29 2010, 11:11 PM |
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