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Discussion Starter #1
Whats the differences between the std and the pro? Didnt see anything on their site.





Just to save someone a post.......whats different besides the price.......thanks :finga:
 

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The standard is divided and the pro is not. The pro is taller and has a 4" opening and the standard has a 3.5 Opening
 

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Discussion Starter #5
I guess im gonna be after the std model. No point in a 4 inch inlet with a 3 inch oulet on the turbo.........or is there?
 

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I guess im gonna be after the std model. No point in a 4 inch inlet with a 3 inch oulet on the turbo.........or is there?
if you can't clock it in a 3/6/9/12 position then i would run the pro if you have the room. some people have distribution problems with the divider. in my case, my plugs all looked a lot better with a divider @ 12 o'clock than without a divider using a std ev hat. this was with a carb of course. you can remove the divider on a std if desired.
 

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Drag Week Survivor
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You can buy the standard with or without the divider .
x'2


And don't forget the standard is also available as cast or polished.

If your running a holley based blowthrough carb with stock style fuel bowls then you will need a 1 inch spacer also as the hat will hit the needle and seat screw/nut . EV also has divided spacers if your running a divided hat.
 

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Discussion Starter #11
ok. So on a 351 with 9.5 comp, high port heads, super victor, 600 ish, 242 ish cam thats never gonna see over 7000 rpm. With a S480 should I use the pro or the std?
 

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i use the pro series one, i think its the only way to go
 

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Custom Engine Shop
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Std to Pro is at about 1000 to 1200 hp or from 3" plumbing to 4" plumbing.

Std EV Hat Bonnet
Divided or Undivided
Polished or Unpolished
Adding a one inch spacer allow 6 and 12 clocking.

The EV Pro uses 4" tubing is about an inch taller and will clear a Holley bowl screw and support over 2000hp.
 

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Order the pro if you have room, if u want to upgrade in the future one less thing to change.
 

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Custom Engine Shop
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The EV Pro has an O-ring, the Std EV can be ordered with an O-ring also.
 
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