330 vs 340 Cam

[2speed]

On a pretty stock engine, using stock intake and carb, which is the better cam? Are 330's available new anywhere? Using a Burtz cam on a stock engine detrimental to performance/mileage?

[Dodge]

Use the Burtz cam with a high compression head and don't look back. Your performance and gas mileage with improve.

[dave in australia]

The 330 cam would be the better choice with stock engine and carb in my opinion. I feel you would see no improvement between the two until you changed the head to a higher comp, and improved the intake system. My 29 Tudor has a 330 cam and a snyder 5.5 head, and stock intake, including a zenith carb. It pulls up any hill in the area in top gear, doesn't over heat and still sounds like an A. I don't have any data to back my opinion up, so that is all it is, an opinion.

[BRENT in 10-uh-C]

Originally Posted by 2speed

On a pretty stock engine, using stock intake and carb, which is the better cam? Are 330's available new anywhere? Using a Burtz cam on a stock engine detrimental to performance/mileage?

Without choosing sides on this, my opinion is based on personally using both of Stipe's IB330 and his IB340 camshafts in otherwise same spec-ed engines. IMHO, the IB330 is a better 'torque' producing camshaft whereas the 340 was more of a mid-range power producer. My personal feedback is that I prefer having torque over power as the driveability seems much more inline with how the original drivetrain of a Model-A was manufactured. It is torque that is your friend with a stock ratioed transmission and a high(er)-speed rear axle ratio (-or overdrive transmission). If you are someone who has a close-ratio 5 speed transmission where the RPM band is tighter between the gears, likely the 340 is better suited.

As far as availability of 330" lift camshafts, Kevin Prus has his new A camshaft enroute as we speak and should be available for purchase within the next 2-3 weeks.

[alexiskai]

Where is the Burtz cam relative to the Stipe cams on the torque/HP spectrum?

[updraught]

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https://www.fordbarn.com/forum/showp...9&postcount=10
somewhere there is a graph of the torque curve. The 340 starts quite a bit higher.

[Flathead]

More duration = less bottom end.

[updraught]

https://www.fordbarn.com/forum/showp...1&postcount=14