[DeTomaso] Dyno Trip #1 and Roller Lifters.....

[Daniel C Jones]

> we saw +300HP with some break up starting at 5700-5800 or so......

Was that through the exhaust at the rear wheels?  Any head work
or are they box stock?

> 331 stroker bottom end.  Flat top pistons (two reliefs), Y303 Motorsport
> aluminum heads,

So around 10:1 compression ratio?

> F303 cam, Ford roller lifters, 1.73 Ford full roller
> rockers, RPM Edelbrock intake port matched to heads, and a
> 570 Holley carb (street avenger?).

Increasing to 700 CFM will pick up 10 HP.  What's the exhaust
(header dimensions, mufflers).

> Apparently the high volume pumps still cause some pressure increase at
> speeds, with Ford lifters (and perhaps others!) and that you can then
> lose performance due to the valves staying open....

I'll pass this by a friend of mine who was in on the testing of
Anderson Ford Motorsports Hi Rev hydraulic roller cams.  He started
out with OEM lifters and then switched to the Crane link bars,
ultimately turning 8800+ RPM with a hydraulic roller.  I know
the Crane lifters specify a full turn past lash and that's what
March ran.

Dan Jones