If you do Vizard and open up the chambers and not mill the the head
to reduce the chamber size your compression will be so low that the
motor will have less
HP than when you started
On my Alpine I run flat top Pistons with mildly ported head with
modified chambers
and a Isky racing cam stock valve train ,about 12:1 comp with series II
Header and 2" Exhaust
I had twin side draft Mikuni 44 carbs on for one season but I was
allways put in the faster class becasue of
the carbs (alfa spiders /911s /lotus) which were quite a bit faster than I
So I took a 2 barrel downdraft manifold from a series iV and modified it
to fit a 2 Barrel Rochester 2G
which is 500 CFM and I allso had a few of them on the shelf
I also modified the carb to use Holley Jets which are abundant
After a few practice races and jetting ,the alpine runs a little faster
times
does about 7200 rpms and I get to run in a class with cars my speed
alot more fun
I believe the the 500 cfm 2 barrel can flow more air than my head can
therefore the sidedrafts were over kill
Rocco
61 Alpine #86 VRG
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