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Bad bucking

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Old Mar 5, 2012 | 04:20 PM
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Default Bad bucking

I put in eps 226/234 113 and I'm getting some nasty bucking at 1k-1. 5k rpm. The shop I got a tune at says that all cams will buck around that rpm. True/false?
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Old Mar 5, 2012 | 04:27 PM
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The short answer is false, but the cause could be either mechanical (e.g. vacuum leak) or the tune.
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Old Mar 5, 2012 | 04:29 PM
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False..im betting the tune is wrong....
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Old Mar 5, 2012 | 04:30 PM
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The tune was by a reputable shop so what's a procedure to find a vacuum leak?
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Old Mar 5, 2012 | 07:40 PM
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FALSE AS ****

i have a COMP XE-R 236 238 .601 .605 112+4 LSA

i had some bad bucking from 1k to the 1.5k RPMs also
i took it back to my tuner and he fixed it i still have a little bit of bucking but nothing like i had before ..

so i would ask to look at the tune again .. they should try to get it right for you
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Old Mar 6, 2012 | 09:02 AM
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Def tune, reputable or not sometimes it takes a little to tune the driveability of a cam.
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Old Mar 6, 2012 | 09:40 AM
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your cam should not have much buck in it at all i have a bigger cam then that and the only time mine will buck is it u try to let it idle going through a parking lot anything above an idle and my car will not buck i would say your problem is in the tune because my car use to do what you are descibing when it was about halfway tuned with a good tune it should drive near stock or at least mine does but i have countless hours in getting my tune perfect
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Old Mar 6, 2012 | 11:41 AM
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ok thanks i'll take it back in
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Old Mar 11, 2012 | 04:20 AM
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It is tune related - no more, no less....

They'll need to look at fuelling, timing, throttle cracker / follower, etc to get it correct.
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