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04-01-2012, 03:41 AM | #1 |
Senior Member
Join Date: May 2010
Location: Germany
Posts: 249
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Cam choice for a blown Flathead
Hi,
what cams would you use in a blown 284ci engine? I read Joe Abbins books and he would use a 400JR But if you ask cam grinders or read a book(Pat Ganahl) about supercharging They say you need more duration (to bleed off some preassue at low rpm) I know that a Flathead engine is different and Joe has probably more experience in blown Flathead and most people, but i like to hear different options. Michael |
04-01-2012, 05:19 AM | #2 |
Member Emeritus
Join Date: May 2010
Location: Fitzgerald, Georgia
Posts: 2,204
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Re: Cam choice for a blown Flathead
Pay attention to the cam grinders. They understand why the lobe separation angle needs to change for a blower and what the ramp characteristics need to be.
ANY cam will work with a blower. However, the manufacturers want you to be happy with their products so they have the computer programs and engineers design products specifically for end use satisfaction. |
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04-01-2012, 12:24 PM | #3 |
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Join Date: Feb 2011
Location: Buchanan, MI
Posts: 676
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Re: Cam choice for a blown Flathead
Pat Ganahl is a great technical writer & researcher & respected in the community. Joe Abbin is an engineer who builds flatheads that really run hard. Joe's theorys are backed up on the dyno. Joe also says the real dyno is the asphalt.
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04-01-2012, 02:53 PM | #4 |
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Join Date: May 2010
Location: Chester Vt
Posts: 8,860
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Re: Cam choice for a blown Flathead
There's a big difference between street and racing, Joe build a great deal od power from his engines, however you ma want to tame things down for the street. The cam grinder can offer some suggestions to the application.
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04-01-2012, 09:13 PM | #5 |
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Join Date: May 2010
Location: charlottesville, Va.
Posts: 589
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Re: Cam choice for a blown Flathead
Joe Abbin builds great engines for both the street and track. He has spent alot of time testing what works and his work is proven on the dyno. His books are great reading, not about something that was done in the fiftys. He backs his work up with graphs and shows the net hp for each. It cant get any better .
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04-01-2012, 09:36 PM | #6 |
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Join Date: Oct 2011
Location: Shelton, WA
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Re: Cam choice for a blown Flathead
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04-02-2012, 04:13 AM | #7 | |
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Join Date: May 2010
Location: 74FL
Posts: 323
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Re: Cam choice for a blown Flathead
Quote:
__________________
Daddy always said, "If yer gonna be dumb, you gotta be tough" and I'm one tough sumbitch! T5 Tech |
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