Jay used the larger Comp
Cams degree wheel. It is easier to read and
the larger diameter makes it easier to get "exactly
to the degree" you are looking for. Comp Cams
was instrumental in working with us to custom
grind our roller camshaft. This is a typical
service they offer any racer and if you are
serious about the power you make just call them
and one of their customer service tech people
will help you out. There is no "special fee"
for this personal service it is just the way
they do business.
The Roeder Performance Machine 572 Mopar then
made back-to-back pulls with a peak horsepower
of 958 HP at 7200 rpm and peak torque of 806
ft./lbs. at 5600 rpm. We ended up at 35 degrees
of timing with VP-16 racing fuel. We will probably
turn the timing back to about 32 degrees for
1/4 mile racing and leave it at 35 when we run
tracks with great starting lines like Eddyville
and CFR. If you haven't been to a dyno session
with a big inch engine sitting on the dyno and
feel and hear it hit 7600 under full load, you
are missing something. When I heard and watched
it and had paid for the engine I thought I was
missing something ... my mind! What was I thinking
standing there watching these guys run my engine
flat-out and no "pipe rack" wrapped around it?
It was GREAT, SCARY and EXHILARATING all at
the same time. The engine ran perfect.
Roeder Performance
Machine installed a set of light pressure
"checking springs" and used the rocker arms,
pushrods, retainers and keepers we would
be racing with when he put the heads on
to check piston-to-valve clearance. It is
"absolutely critical" to always check piston-to-valve
clearance. Just because you think it should
be OK it isn't. Many engines have been destroyed
because piston-to-valve clearance was too
tight and they ended up with the valve hitting
the pistons and valves breaking off and
destroying pistons, cylinder walls and more.
Take the time to check it. |
After a mad thrash to get the motor home out
of storage and the trailer cleaned out and "sort
of organized", it was time to finish the car.
Several companies helped make it happen and
I want to mention them just in case you are
looking for a part they offer. I hope you will
support the companies that have supported "Project
4-Link" the last few years. Barry Grant / Demon
Carburetors provided a deadly matched set of
tunnel ram King Demon RS. RCI had just what
we needed to update our safety harness, engine
diaper that is now required in Top Dragster
and a set of fire pants and jacket for Andy.
Indy Cylinder Head produces a tunnel ram intake
that was flat-out amazing in the power gains
it provided. Flat-Out Gaskets made a custom
set of rubber-coated copper head gaskets for
our 4.500" bore Mopar. Comp Cams worked with
us in designing a roller cam that would match
the heads, intake and our plans. Chris did a
great job and his service at Comp Cams was extremely
thorough and the roller lifters, springs, retainers
and 10-degree keepers all fit perfectly. CP
Pistons worked with the engine builder to produce
a light piston and ring package that will offer
durability and excellent performance. Steve
Stokes dragged over his new TIG Welder and put
in the helmet bars I am required to have. Steve
owns a local metal fabricating shop and this
was his first time welding on a chrome-moly
dragster chassis and his workmanship was superb.
THANKS Steve, reminded me of the "old days"
when doctors made "house calls"!
Here is the "crew".
On the dyno controls is Jeff Stealy, in
the foreground is my son, Andy, who will
do most of the Top Dragster driving and
in the background is "Mr. Horsepower", Jay
Roeder. (I had to poke him to keep him awake
UNTIL THE ENGINE WAS RUNNING!) Man, did
that big Mopar sound GOOD at 7500 rpm!
|
We finally got everything loaded and began
out first outing in Top Dragster trim. We are
headed to the NHRA Spring Challenge XII at St.
Louis Int'l Raceway in IL. I was fortunate enough
to have won that event last year in Super Comp
and this year we will give it a try in the JEG'S
Super Quick Series. Of course we have to ACTUALLY
QUALIFY for that race. Look for the results
in my mid-month update. I'll go over our actual
runs, what we learned about converters, etc.
in our first ever JEG'S Super Quick Series event.
You will hear from me in a couple of weeks.
Race safe my friends ...
Previous
Story
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Project
4-Link
3/10/04
Building a 572ci Mopar Wedge Motor for Project
Top Dragster |
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