looks like Im going with the Street avenger 670. That way when I do decide to change the heads and cam, or stroke the motor down the road I will have a carb up for the challenge.. thanks for the info guys.. Im still up for suggestions and info..

 

You may consider a Demon. That's what I'm going to go with when I finally get a decent set of heads on my motor. I've heard nothing bad about them.

But until then, I have and love an Edelbrock. I've got it dialed in almost perfectly (need to order a specific pair of rods from Summit) and it works great at all rpm's. What some people might see as a major downside of the Edelbrock Performer carbs is the lack of adjustable secondaries. They've never given me a problem, though, so I can't comment on that aspect. They come in when I need them, and stay shut when I don't.

 

Holley's don't leak if you use good gaskets and tighten them properly.

Demons are ok for the money, but if you're willing to spend more I still recommend Quick Fuel.

 

How much "more" is a Quick Fuel, though? A Street Demon already has a hefty price tag, especially once you add annular boosters.

 

My 650 annular Quick Fuel was $550. But in reality you get it for the tunability, so then you add air bleed assortment kits, plus some jets, in my case a set of idle feed restrictors, gaskets and so on, and you end up into it for $700+. They have excellent customer service/support.

In the end it gets back to how much you're willing to spend for what you want. Demons are a decent carb for the money, Quick Fuel is an even better value in terms of what you get for what you pay, but it costs even more up front. If you're not gonna play with air bleeds and idle circuits like that, then there's no point, so you might as well spend less and get a Demon. The performance you get from your carb is related to the tuning effort you put into it, so if you don't put in that tuning effort, there's no sense to spending more on a carb you won't use.

Quick Fuels do have an excellent metering system though.

 

good lord. and i thought 400 for my 570 street avenger was a rip

 

$700!!!! If I were faced with that there would be fuel injection going on instead. Sure it is more money and more work, but the right FI is way more tuneable than ANY carb out there.

 

Not really, especially with aftermarket speed-density systems. A computer has a finite number of "cells" to store fuel data in. A carb has an infinite amount of fuel curves that depend on vacuum and air flow. You can't change them on the fly, but if you tune it right, you shouldn't have to. The carb will adjust itself for the varying engine conditions. A good carb also does a better job of atomizing fuel than a fuel injector.

 

My son had a Mighty Demon on his aprox 450HP truck, worked great and made great power till he got the idea to mix some e-85 in his gas...

He went back with an Edelbrock, lost some power, but both cold starts and general streetability are way better.

Even in NM, the absence of the choke is problematic in the wintertime.

I have a little experience with Holley (along with the Demons) I am certtainly no kind of a carb tuner whatsoever, but I have never found them to be really difficult to tune (to my low standards!). I can't say I have ever had trouble with them leaking, blowing power valves or anything else bad.

I guess I like the fact that every Edelbrock I have ever used has worked very nicely with MINIMAL tunning right out of the box.

I will be the first to admit that I dont really fight for the last 5, 10, or 15 HP potential, I am just lazy that way.

 

Not to Hijack this thread, but I have a Motorcraft (Holley reman) 64-5132 that leaks horribly. I can't get a good seal on the intake and it leaks by the auto choke area!! I was thinking of going edel or just rebuilding the original 2100! Any thoughts on this? By the way the only info I can find on this carb is that it should be on a 302 and mine is a 66 289!!