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Front is knocking at launch

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Old Sep 1, 2011 | 08:03 AM
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mhax's Avatar
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Default Front is knocking at launch

My car - stock 2001 integra gsr

When doing 1/4 miles with a set of 185 width tires on stock wheels, the car didnt knock when launching at over 6000rpm. Wheels were spinning that's all.

I've tried again with a set a rpf1 with 205 width tires and the car knocked so hard that the radio came out! I had to launch more slowly in order to get less knocking of the front. Should i launch at a lower rpm with lower weight wheels and wider tires? Any tips?
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Old Sep 1, 2011 | 08:17 AM
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Default Re: Front is knocking at launch

wheel hop?
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Old Sep 1, 2011 | 09:18 AM
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Default Re: Front is knocking at launch

Originally Posted by turbo-2nr
wheel hop?
something like that!
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Old Sep 1, 2011 | 09:54 AM
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Default Re: Front is knocking at launch

welcome to i wanna be a street racing, and drag race on street tires lol somethong will eventually break due to the hop

this is why alot of us just ay screw it and run slicks, and yes we still break axles
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Old Sep 1, 2011 | 10:57 AM
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Default Re: Front is knocking at launch

Originally Posted by sanman000719
welcome to i wanna be a street racing, and drag race on street tires lol somethong will eventually break due to the hop

this is why alot of us just ay screw it and run slicks, and yes we still break axles
Like i said, all my launch with the street 185 tires were fine, i really don't know what your answer is for. My launch with the 185 width tires didnt create heavy wheel hop like i got with the summer 205 width tires. I probably did domething wrong with launching, and even with drag tires i'm almost certain that i would still have wheel hop. Now my question was, what can i change in order to create less wheel hop?
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Old Sep 1, 2011 | 11:01 AM
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Default Re: Front is knocking at launch

try traction bars
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Old Sep 1, 2011 | 11:03 AM
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Default Re: Front is knocking at launch

do you have a traction bar?
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Old Sep 1, 2011 | 11:28 AM
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Default Re: Front is knocking at launch

Try launching at a lower RPM.
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Old Sep 1, 2011 | 02:55 PM
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mhax's Avatar
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Default Re: Front is knocking at launch

Originally Posted by Poootie
do you have a traction bar?
well is there a traction bar on a stock gsr? If yes, then i have one, if not, i don't. Any brand to recommend? What the traction bar is useful for? Will it helps for lapping as well?
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Old Sep 1, 2011 | 04:36 PM
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Default Re: Front is knocking at launch

Originally Posted by mhax
well is there a traction bar on a stock gsr? If yes, then i have one, if not, i don't. Any brand to recommend? What the traction bar is useful for? Will it helps for lapping as well?
No, it does not come stock with a traction bar. One like this:

http://www.full-race.com/store/tract...ction-bar.html
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Old Sep 1, 2011 | 04:52 PM
  #11  
Garage 808 Hatch's Avatar
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Default Re: Front is knocking at launch

Wheel hop, broken motor mount, etc
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Old Sep 1, 2011 | 05:01 PM
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Default Re: Front is knocking at launch

Your old 185 series street tires were not made for good cornereing like your 205 summer tire. This means the 205 has a harder sidewall which makes for a better handling tire but unfortunately creates wheel hop when launched. Your best bet is to get a set of drag radials which have a softer sidewall which is much better for launching.
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Old Sep 2, 2011 | 05:10 AM
  #13  
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Default Re: Front is knocking at launch

I will start by upgrading the suspension with some coilovers, because the weight is so heavily transfered to the rear when launching, that probably cause less traction on the front.
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