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73-87 Chevy _ GMC Trucks => Performance => Topic started by: adams18 on February 02, 2011, 10:04:12 PM

Title: Is there such a thing as TOO big?
Post by: adams18 on February 02, 2011, 10:04:12 PM
I have a Holley 650 Double Pumper on a Professional Products Hurricane intake manifold(3500-8000RPM range) on my 355 with stock heads. .454 lift and 268 duration cam. Is this intake too big?? Thanks
Title: Re: Is there such a thing as TOO big?
Post by: adams18 on February 02, 2011, 10:05:46 PM
I've been told that this is just flat out a wrong setup. What do you guys think?
Title: Re: Is there such a thing as TOO big?
Post by: Grim 82 on February 02, 2011, 10:19:23 PM
I don't have much technical data to back up my thoughts on it, but I think if it's for anything short of an all out race machine I'd have to agree that it's not the right setup. A daily driver won't see the rpm range where that intake really shines, so it's not doing you any favors. I would expect more torque and low rpm throttle response from a stock intake, or a simple dual plane like the Edelbrock EPS.
Title: Re: Is there such a thing as TOO big?
Post by: topp on February 02, 2011, 10:27:38 PM
Dual plane intakes are best for off idle to about 4500 rpm....
Title: Re: Is there such a thing as TOO big?
Post by: adams18 on February 02, 2011, 10:29:38 PM
That makes sense. The most I would ever want to turn this engine is 5200. and this intake is a single plane.
Would anyone like to trade a more moderate intake for my polished high rise??  :) :)
Title: Re: Is there such a thing as TOO big?
Post by: beastie_3 on February 02, 2011, 10:39:29 PM
Key word: stock heads
Title: Re: Is there such a thing as TOO big?
Post by: adams18 on February 02, 2011, 10:45:30 PM
They're 1.94s with a three angle valve job.. although I may be putting some 2.02 Vortecs on it. Still stock though..
Title: Re: Is there such a thing as TOO big?
Post by: 1980c10 on February 02, 2011, 11:11:11 PM
Look up the specs for rpm range on your intake and cam-they should match up. also if you are going with vortech heads you'll need an intake to match the heads as well.
Title: Re: Is there such a thing as TOO big?
Post by: ohio hab on February 03, 2011, 04:53:50 PM
What is the number of the casting's of the cylinder heads? Beastie 3 make's a valid point. Is the truck an automatic or stick? Need more info, for a better answer. If the truck is basically stock, axle ratio, no convertor change, headers, free flowing exhaust, etc.. then yes 650 d.p. too big. Dual plane, more low end, single plane more for top end. Your combo might be able to be tweaked, just need more information on your setup.
Title: Re: Is there such a thing as TOO big?
Post by: Psycho71 on February 04, 2011, 09:07:48 AM
I'm going to venture to say, you need to stay with a dual plane intake for that head, cam, and carb set-up. Even upgrading the heads fairly soon, that cam won't make use of that intake. You'll end up with a slug of a motor on the bottom end, which is not what I personally like in a heavy truck. Low to mid-range is where it's at for me. Performer RPM, or even the PP Typhoon, or something of the like will yield you much better, and driveable, results.
Title: Re: Is there such a thing as TOO big?
Post by: bobcooter on February 04, 2011, 09:29:20 AM
Just a rule of thumb. If you see an intake mainifold with a giant square hole in the center, it's too big to drive on the street and do any good. It's made for flat out racing.
Title: Re: Is there such a thing as TOO big?
Post by: three8six on February 04, 2011, 10:31:56 AM
 I would say don't use that intake with that setup.