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Re: 8.5 or 12.5 carbs - when to use
Posted by 'raceinstructor' on 04 Mar 2012 @ 14:01


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raceinstructor
Joined: August 2007
Total Posts: 1754
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Basically it is believed that the 12.5 is better on 'top end' tracks and the 8.5 on tighter twisty tracks, however a well set up 8.5 jetted correctly will always out perform a 12.5 if it is not perfect.
The biggest gains are found in set up as well as testing several carbs to find the best, some offer poor performance due to manufacturing variations, mostly though it is as I said poorly prepared and set up carbs that are the culprit not the fact that the venturi is marked 8.5 or 12.5.

Message Thread:

8.5 or 12.5 carbs - when to use  by 'HarryH1997'   (04 Mar 2012 @ 12:21)
Re: 8.5 or 12.5 carbs - when to use  by 'maxdad'   (04 Mar 2012 @ 12:41)
Re: 8.5 or 12.5 carbs - when to use  by 'raceinstructor'   (04 Mar 2012 @ 13:29)
Re: 8.5 or 12.5 carbs - when to use  by 'HarryH1997'   (04 Mar 2012 @ 13:45)
Re: 8.5 or 12.5 carbs - when to use  by 'raceinstructor'  << You are here!
Re: 8.5 or 12.5 carbs - when to use  by 'HarryH1997'   (04 Mar 2012 @ 16:03)
Re: 8.5 or 12.5 carbs - when to use  by 'raceinstructor'   (04 Mar 2012 @ 19:14)
12.5 Venturi IS Legal in POST 2001 Carbs  by 'ScoobyScene'   (04 Mar 2012 @ 23:20)
Re: 12.5 Venturi IS Legal in POST 2001 Carbs  by 'stec rmh51'   (05 Mar 2012 @ 6:01)
Re: 8.5 or 12.5 carbs - when to use  by 'RocketMan46'   (05 Mar 2012 @ 8:45)
Re: 8.5 or 12.5 carbs - when to use  by 'stec rmh51'   (05 Mar 2012 @ 9:47)
Re: 8.5 or 12.5 carbs - when to use  by 'jmw'   (05 Mar 2012 @ 11:28)
Re: 8.5 or 12.5 carbs - when to use  by 'maxdad'   (05 Mar 2012 @ 12:26)
Re: 8.5 or 12.5 carbs - when to use  by 'HarryH1997'   (05 Mar 2012 @ 21:11)
Re: 8.5 or 12.5 carbs - when to use  by 'raceinstructor'   (05 Mar 2012 @ 22:29)
Re: 8.5 or 12.5 carbs - when to use  by 'deadfrogracing'   (06 Mar 2012 @ 12:51)
Re: 8.5 or 12.5 carbs - when to use  by 'RocketMan46'   (06 Mar 2012 @ 14:58)
Re: 8.5 or 12.5 carbs - when to use  by 'raceinstructor'   (07 Mar 2012 @ 8:51)
raceinstructor  by 'stec rmh51'   (06 Mar 2012 @ 17:40)
Clutches & Carbs  by 'ScoobyScene'   (06 Mar 2012 @ 19:01)
Re: raceinstructor  by 'dynamax'   (10 Mar 2012 @ 9:24)
dynamax  by 'stec rmh51'   (10 Mar 2012 @ 18:42)

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