Hi Scott,
Your plans sound good except I would worry about a roller cam on the
street. Many knowledgeable people that I have spoken with said that they
die quick deaths if they spend much time idling. If you are going to use
the same profile as the original 289 hp you won't gain any HP by using
roller lifters. You can get a lot of HP out of a solid flat tappet cam
and still keep it streetable with a long life. I suggest you do some
homework before committing to a roller and make sure that it is what you
want. I've got a 289 with flat tappet cam, '69 Ford Windsor heads, and
it cranks out 425 hp at 7500 rpm [although it is a little high strung
for the street ;) ]
Craig Wright
Scott Hutchinson wrote:
>Right now the 260 is sitting on the floor of my garage, the result of a
>bad throwout bearing. It is amazing that such a tiny little part can be
>the cause of so much work. Any way while the motor is out I am going to
>try some minor work to the motor to improve performance, but more
>importantly to increase durability and efficiency.
>
>The plans are thus.
>
>1. Screw in rocker studs.
>2. New valve seats for unleaded gas.
>3. Bronze valve guides.
>4. Roller rockers. (Probably CompCams Magnums, maybe promagnums but
>most people have said this would be over kill.
>5. Custom Ground roller camshaft that is basically a reproduction of
>the 289 hp cam. It will have the same firing order as the 260 and
>should provide a nice hp boost without killing the low end torque.
>CompCams will custom grind it for about $300.
>6. Crane drop in roller lifters. (no modification to the block
>required.)
>7. F4B and Holley 1848.
>8. Centerforce Clutch.
>9. Roller Timing Chain
>
>I am quite happy with the performance of the car with the 260. I seems
>to me the real limitation of the Tiger is traction. Even if you put 400
>hp out of the tailshaft, you just can't get it to the ground without
>doing some major mods to the bodywork. Who knows though, I've only had
>the car for a year, so maybe in a few I'll get bored and throw a blown,
>347 stroker in there, backed up by a Richardson 6 speed, I mean if your
>gonna go for gears why not have a few more than four.
>
>I should have it all back together by the end of the month so I'll let
>you know how it comes out.
>
>Scott
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