That could be a 4.200 bore and a 3.52 stroke for 390 CI. You could use a 9.50 deck with a longer rod or a 9.20 deck. If you really wanted to go low you could use a 8.20 302 block. Anyway you look at it that is one fine engine. Some folks don't like the 7 1/2 intake valve angle but this one sure does.Torquemonster wrote:Tony Marsh of Marsh Motorsports, Manukau City, Auckland, New ZealandGary Blair wrote:That is a real stout engine. Who built it?Torquemonster wrote: Yates is all I know about the heads Tony used to get 2.61hp per cube. Ran a 6 second pass - not bad for a small block on gas - no power adders.
this guy is up there with the best and has good friends in US Pro Stock so they kinda share tricks etc.
If you wanted a motor like that - you'd spend more on ring prep alone than the average hot rodder spends on machining. Motors this good have zero leak down.
BTW - the small block 390 Ford is making peak power around 9700rpm but spins much higher if needed. With the rod stroke ratio that stroker must have - that's darn fine engineering in anyones book. Valve spring pressures are (don't quote me) I think around 2000lb open... is that possible? The engine runs all season - we kiwis can't afford to rebuild every race - tho it must get maintenance.
We got a 6 second pro mod to run all season on zero wear and no parts used up - not even a spring - but that was 1200lb springs, prelubing and a VERY good oil.
highest hp with a wedge head?
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Re: 312
Re: re valve angles
[quote="Gary Blair"]
The Tiger head was a dedicated shaft rocker head. Is that still true?
i know Kaase fabbed the rockers. It would have been a major concern if he was in the top 3...... it was the reason it never came up since he didn't have to tear down......
The Tiger head was a dedicated shaft rocker head. Is that still true?
i know Kaase fabbed the rockers. It would have been a major concern if he was in the top 3...... it was the reason it never came up since he didn't have to tear down......