Quote:
Originally Posted by frnkeore
Thank you, very much, Ted. Are those dyno results posted somewhere on your web site?
If not, could you give general specs for a 150 HP and a 200 hp build? Such as, cubic inch, approx C/R, cam and carburation?
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Because the Eaton Balancing website concentrates heavily on the Ford Y-Block builds, other engine builds are not posted on that site. I can see why there's not a lot of engine dyno information out there for the Ford Flat head V8 engines. They are not the easiest engine to get hooked up to an engine dyno so many of the dyno shops out there will not set up for them.
The 450 HP supercharged Flathead was on nitro methane and serious boost. That one made everyone's eyes water as it was running zoomies and the shop was getting a full blast of burnt nitro fuel. It was a solid 9 second runner in the quarter mile.
The 200+HP normally aspirated Flathead was a Bonneville engine that was just breaking the 200 HP mark at 203-205 HP. That particular engine was 294 cubic inches at 10.1:1 compression ratio and was running on 110 octane racing gasoline with a Hogan's sheet metal intake manifold and a pair of 390 cfm 4V Holley carbs. Camshaft was a Potvin 425. The piston design required that the Offenhauser heads be machined accordingly for piston clearance in the cylinder heads. The combustion chamber cc's are 73.6 while the piston domes are 25 cc's. Exhaust header design was also critical on that particular engine. Without looking it up, I vaguely remember it running at 24° total timing for the best horsepower numbers. Tried to post pictures of the pistons and combustion chambers but this site asks for URL links which I don't have.
I'd have to look at the build details for the 150 HP version for the Flattie but remember it having Edelbrock heads, Offenhauser two deuce intake with new Speedway carbs, the small Isky camshaft, and Fenton cast iron headers. Final cubic inch on that one escapes me right now. Compression ratio on that one was for pump gas premium and idled nicely. Higher horsepower versions than this one have been done but those get ragged for running as everyday street engines without a large gain in horsepower. Ted Eaton.