spudders on brake

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spudders on brake

Post  johndickjr on July 7th 2013, 6:58 pm

i just put a new cam and vic jr on my sbf, before it was fine, it would go 4500 on brake no problem and 3000 on the foot now if i try to use the tranny brake the sec i try to give it gas it spudders and dies. or even footbrake .any thoughts?

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Re: spudders on brake

Post  richter69 on July 7th 2013, 7:02 pm

carb might need more pump shot w the bigger cam and intake.
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Re: spudders on brake

Post  johndickjr on July 7th 2013, 7:12 pm

richter69 wrote:carb might need more pump shot w the bigger cam and intake.
ill try that, currently has 31 front --32 back

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Re: spudders on brake

Post  richter69 on July 7th 2013, 7:23 pm

may need bigger 50cc pumps also
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Re: spudders on brake

Post  johndickjr on July 7th 2013, 7:41 pm

richter69 wrote:may need bigger 50cc pumps also
front and back ?

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Re: spudders on brake

Post  johndickjr on July 7th 2013, 7:50 pm

also it did have 11 inch of vacuum and now has 5inches but i did not change the p.v and its a 6.5..if its a 6.5 and i only have 5 inches it opening at ideal correct ?

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Re: spudders on brake

Post  richter69 on July 7th 2013, 8:58 pm

yeah its possible. Id plug the pv and jet up 6 sizes or so and see if that helps.
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Re: spudders on brake

Post  Dave C. on July 7th 2013, 9:06 pm

Yeah, either plug em or put 3.5 's in it. The PV needs to be less than the vacuum reading . Might need to advance the initial timing also.

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