As some of you know I had already been using the
short block with a different top end when I decided to add the blower. S o
this 474 was not really built to handle the horsepower the 871 blower is
capable of producing. So I have to be conservative since this is only a 2
bolt main with no block filler, and stock 6H heads. You might notice that
I don't have a lifter bore brace either. That's because I'm only running a
solid flat tappet cam with about .525 lift.
I've run a best of 10.73 at 124mph at Speedworld in
April this year but grenaded my converter on that pass. I went a 128mph on
the pass before but my time was way off as the car didn't hook on take
off.
This type of blower also TAKES about 100
horsepower at 6,000 rpm to run, so I lose some good horsepower under load.
I was hoping to have my heads ported before the
racing starts up next January but it's looking like I'll be running the
way I am right now. Keeping my fingers crossed for the big bonus
The pictures are below, just click on them for a
larger view. One is with the spacer installed on the intake and the next one has
the blower sitting on top
One has the carbs mounted and the next was the with
the hilborn scoop that I ran when I first put the set up together. I later
changed the scoop to the "Shotgun" that Speedway Motors sells.
