Ported Edelbrock versus W2 out of the box !
There is a big difference between the .03 and the .125.
I prefer to think of it this way........ there
can be a noticable difference in flow when using different sized bore adapters.
But, I’ve tested numerous heads on different bore sizes where it either did nothing, or hardly anything.
It’s not an “automatic” gain in flow on the bigger bore.
I had some fairly well ported T/A heads here that flowed quite a bit less on my bench than the place that ported them was getting.
I thought maybe they had been flowed on a big bore, and I was using 4.00, so I tried them on a 4.25. Basically no difference.
That wasn’t why the numbers were different.
I just did the math...... it’s a 422.
This build was quite a while ago, and I seem to recall it was a “419”(4.080 x 4.00).......but I also seem to recall it was 4.100 bore.
It’s one or the other....... can’t remember for sure which.
Stout cam & comp. ratio for sure. Not exactly what I'd call a street cam
Yeh...... if I were building something more street and user friendly, I’d probably be targeting 550hp or so.
I’m not sure what I’d use for a build where the goal was another 100hp above that.
Probably some 360-1’s.
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Here’s a home ported W2 that was sent to me to test.
2.08/1.60 valves....... the whole port has had work done to it, along with some finishing with sandpaper rolls.
The intake short turn needs some attention, and the proportions of the bowl are a bit off, which is at least part of the soft low/mid-lift flow.
4.00” bore.
Lift——-in/ex
.100—-61.5/52.0
.200—116.2/111.7
.300—168.7/152.5
.400—213.1/187.9
.500—252.2/206.2
.600—272.6/208.7
.700—257.0/210.8
