this is what i just installed through the winter in my garage.
it was plain stock before.

-I removed the cat converter.
-Installed hedmen hedders (with Y-pipe)
-flow master muffler 80 series 2.5 inch IN/OUT.
-600cfm edelbrock carb.
-Edelbrock performer intake.

How much more HP should that give me??!!

 

Nothing to something! What engine do you have?

 

V8 5.0L 305

 

Take it to the dyno. All your power questions shall be answered.

 

Was it a 120 HP 305 2-barrel long block? was it a 190 HP L69? was it a TBI 305? You'll get vastly different results depending on what you started with.

 

it was a 4bbl 305. stock was 150hp or 170hp, i'm not sure, i'm getting different answers. I guess i should bring it to a dyno... but that cost money . But yeah, i'll go do that when i take it out of storage (2-3weeks).


thanks guys

 

So it's almost certainly the LG4 base-model 4-barrel.

Out of the list of thing you listed, the one and only thing that actually gave you more power, was the headers. And without a new cam, that gave you at most 20 HP.

One of those mods, the carb, set you back in the power dept. if you didn't also change the distributor. So that one could be a net HP loss rather than a gain.

So overall I'd guess you're somewhere a little shy of 200 HP.

We can guess all day long. We might even actually be right. Or we might be totally off base. The only way you're really going to know the truth, is to take it to the dyno.

A car with 200 crank HP will put about 155-160 to the rear wheels. That's what I'd expect you'll see at most on the dyno.