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Which rockers with a C35?
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Figment
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PostPosted: Sat Jan 18, 2020 10:54 am    Post subject: Which rockers with a C35? Reply with quote

Hey guys

Looking for opinions on 1:1.1 vs 1:1.25 rockers on this combo for a street motor in my Ghia...

1915
Scat C35 cam
Panchito 044 heads
40 IDF carbs

Thanks,
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vwracerdave
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PostPosted: Sat Jan 18, 2020 11:10 am    Post subject: Re: Which rockers with a C35? Reply with quote

If you have single springs use 1.1 rockers and put 30mm venturies in the 40 IDF's. If you have dual springs use 1.25 rockers and 32mm venturies.

You didn't mention but use 1 1/2" exhaust.

Rant: CB should not sell Panchito heads with single springs.
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Figment
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PostPosted: Sat Jan 18, 2020 11:57 am    Post subject: Re: Which rockers with a C35? Reply with quote

Yes dual springs and 1.5” exhaust
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bugguy1967
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PostPosted: Sat Jan 18, 2020 12:30 pm    Post subject: Re: Which rockers with a C35? Reply with quote

[quote="vwracerdave"]If you have single springs use 1.1 rockers and put 30mm venturies in the 40 IDF's. If you have dual springs use 1.25 rockers and 32mm venturies.

You didn't mention but use 1 1/2" exhaust.

Rant: CB should not sell Panchito heads with single springs.[/quote

I have Panchitos with single springs, and I'ma use the entire capacity of those heads while maintaining excellent valve control. Not everyone needs a ton of spring pressure and heavy chromoly pushrods.]
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Multi69s
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PostPosted: Wed Jan 22, 2020 12:53 am    Post subject: Re: Which rockers with a C35? Reply with quote

My two cents on valve springs: Dual or single springs are irrelevant. What is required is that you have the proper seat pressure at the installed height, AND the springs do not loose their modulus of elasticity over the many thousands of cycles that the valve train goes though. Any more tension than is required robs HP, and more importantly, reduce the life span on the valve train.
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