Autocross and Wheel Hop - Mazda3 Forums : The #1 Mazda 3 Forum
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post #1 of 22 (permalink) Old 02-19-2009, 11:19 AM Thread Starter
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Autocross and Wheel Hop

I've had my 3 at the past two wet autocrosses and I've been getting some pretty annoying wheel hop (however, it does it in the dry too). I have to let off the throttle and then reapply which is not good for time. Are there any mods that could help in this area? I read it's the motor mounts causing the hop... Thanks!
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post #2 of 22 (permalink) Old 02-19-2009, 11:44 AM
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Re: Autocross and Wheel Hop

It is mainly the rear (actually called side by Mazda cause the motor sits crossways) mount. A number of companys make stiffer replacements which go a long way to controlling the hop. I personally recommend the SU mount. I have one on my MS3 (same mount fits the MZ3 if you have the 2.3 motor), with about 40,000 miles on it.
Here is the one I recommend:
http://www.streetunit.com/MAZDASPEED..._p/sum3amm.htm

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post #3 of 22 (permalink) Old 02-19-2009, 01:00 PM Thread Starter
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Re: Autocross and Wheel Hop

Thanks for the quick reply - is the rear mount easy to replace (torque specs?)? I have access to a lift and tools.
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post #4 of 22 (permalink) Old 02-19-2009, 01:15 PM
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Re: Autocross and Wheel Hop

what car and what class are you running in?
rear mount takes you out of stock and into a ST class

1995 Miata R #187 ES

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post #5 of 22 (permalink) Old 02-19-2009, 02:30 PM Thread Starter
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Re: Autocross and Wheel Hop

I'm running H Stock right now, so I guess I'd be going to ST.
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post #6 of 22 (permalink) Old 02-19-2009, 03:23 PM
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Re: Autocross and Wheel Hop

Even in ST, the volume of metal in the mount can't change, but inserts are legal. I haven't had any wheel hop with inserts, just spin city. But I rarely do bone jarring drag starts anyways.


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post #7 of 22 (permalink) Old 02-19-2009, 03:39 PM
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Re: Autocross and Wheel Hop

[quote author=MrEddie link=topic=136737.msg2947671#msg2947671 date=1235068200]
I'm running H Stock right now, so I guess I'd be going to ST.
[/quote]

I get little or no wheel hop in my HS car. Before spending money that may or may not fix the problem, you may want to look at your driving style. Smoother application of the throttle (it is not an on/off switch) usually makes the problem go away.

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post #8 of 22 (permalink) Old 02-19-2009, 05:39 PM
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Re: Autocross and Wheel Hop

+1

I've gotten some wheel hop at Pro Solos and the local drag strip, but never a regular autocross. Make sure your stock mounts are in good shape (both PZ and I have broken one, I believe) and work on being smooth on the throttle.


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post #9 of 22 (permalink) Old 02-19-2009, 06:59 PM
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Re: Autocross and Wheel Hop

[quote author=steverife link=topic=136737.msg2948181#msg2948181 date=1235079580]
+1

I've gotten some wheel hop at Pro Solos and the local drag strip, but never a regular autocross. Make sure your stock mounts are in good shape (both PZ and I have broken one, I believe) and work on being smooth on the throttle.
[/quote]
Me too!

I also suggest working on throttle modulation. I'm rarely 'right foot in' on launch when autoxing. Practice makes perfect!
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post #10 of 22 (permalink) Old 02-20-2009, 12:50 AM Thread Starter
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Re: Autocross and Wheel Hop

So other than the leaking oiling I've heard about, how do you go about checking the motor mounts - visually looking for cracks, wiggle tests, etc? Also, I launch ok, the hops occur when coming out of a sharp turn and applying throttle - I start hopping, so a let off and reapply at a more gentle rate. I had a integra gsr back in the late 90s and it would spin the wheels easy in 1st with hard acceleration but wouldn't really hop too much... Thanks for the replies!
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