Hi I'm new to this forum and I just wanted to know what kinda power I should be expecting with this combination:

Iron vortec heads
Edlebrock preformed intake
Holley 570 street avenger
280h comp cam
Flat top pistons
Hooker short tube headers

I know the heads have been machined but I don't know exactly how much. I do know that my 475 lift isn't hitting and that's about as much as I know. I've head of people getting 370 hp and 400 lbs tq with these heads but they have had work done to them

 

Which vortec heads and what cid?

 

350, they are 906 iron vortecs. After doing some research I found out they are great stock heads, I thought I was stuck with swirl port until I looked at the intake bolts.

 

Are you sure about the lift of the cam? A 280H should be .480" lift.

You're a little under-carb'd and under-intake'd. A 600-650 CFM carb would be better, and a Performer RPM is more suited to the cam (although it's not that great of a cam).

You're probably in the 350 HP range. With a better cam, intake, and carb, 400 should be a cake walk.

 

350, my mistake...Not much room for improvement on the vortecs. Maybe some polishing of the intake port short turn. I agree with a bigger carb.

 

So basically if I wanna get any real improvement I should look at some new heads? I don't have the cash now but in the future I was looking at the afr 195 eliminators and a 670 carb, after I build my tranny and rear to hold more hp

 

400 is good street horse power, get a carb, rpm air gap intake and LONG tube headers, if you have a dremel port match the exhaust ports on both head and header

 

Personally, I have no love for those Street Avenger carbs. Or vacuum secondary carbs in general, for that matter.

With the right stall, a double pumper will do much better than a VS carb. A 650 will support the power you're talking about just fine.

The weakness of the Vortec heads is the exhaust ports. That's why I'd say get a better cam as well. One with a little more exhaust duration to help them do what the intakes do.