The Ford Barn - View Single Post - Cyl Heads-Navarro vs Edelbrock or Offenhauser

Ol' Ron · 05-18-2019, 03:38 PM

Pete
My options are limited to a 258 ci displacement. So CR is hard to get. Having flow tested most stock and aftermarket heads. The EAB is probably the best. Thats why they give almost 8;1 on a 276 and with the small piston clearance make for great throttle response. I'd like to have 8.5/9 on the 258 engine and the net valve lift with the D 410 cam is 390. If the new port works, I'll need the better flow of the stock heads. Now, where do you put the brass?? 10cc of brass is about a 5/8 cube in area. If he still has the fixture to hold the heads I can melt it in the transfer area at an angle towards the exhaustside. The fixture was a double gas burner from the dark ages. it held the head about 2" abouve the burners while the head was clamped to it. He heated the head up to some temp that he tested with a stick of something. Then used his acc touch to ment in the brass.. Once it was done he through an abstouse blanket over it. I might skip that part. Gota give JWL some credit here.

05-18-2019, 03:38 PM	#34
Ol' Ron Senior Member Join Date: May 2010 Location: Chester Vt Posts: 8,857	Re: Cyl Heads-Navarro vs Edelbrock or Offenhauser Pete My options are limited to a 258 ci displacement. So CR is hard to get. Having flow tested most stock and aftermarket heads. The EAB is probably the best. Thats why they give almost 8;1 on a 276 and with the small piston clearance make for great throttle response. I'd like to have 8.5/9 on the 258 engine and the net valve lift with the D 410 cam is 390. If the new port works, I'll need the better flow of the stock heads. Now, where do you put the brass?? 10cc of brass is about a 5/8 cube in area. If he still has the fixture to hold the heads I can melt it in the transfer area at an angle towards the exhaustside. The fixture was a double gas burner from the dark ages. it held the head about 2" abouve the burners while the head was clamped to it. He heated the head up to some temp that he tested with a stick of something. Then used his acc touch to ment in the brass.. Once it was done he through an abstouse blanket over it. I might skip that part. Gota give JWL some credit here.