Cold Air Intake ...recent reviews

Discussion in 'Small Block Tech' started by Sebambam, Dec 27, 2015.

  1. Sebambam

    Sebambam Well-Known Member


    DEADMANSCURVE my first word : truck

    well - $150 at summit so the price is right and they have good feedback . looks nice I think . might have to jet carb up a notch .
    summit info sez 14" housing and 12.6" x 3" filter so appears to be pretty close to a standard 14 x 3 filter with a drop base . one summit review said they had to do a little "adjustment" to base to clear a 650 holley DP float adjustment screws . other reviews all positive .
    edit : a second look at e-bay ad pics makes me wonder how the top seals to bottom ? almost looks like there has to be a 3/4" air gap around bottom going by pics and size description ?
  3. Sebambam

    Sebambam Well-Known Member

    i guess i have to try it out
  4. Mark Demko

    Mark Demko Well-Known Member

    I'd like to see a track test, back to back, of the Spectre cold air intake verses the stock GS cold air intake.
    The Spectre receives more "positive" cool air, but still goes in two snorkels.
    The GS type receives its cool air from the top of the hood and goes in two snorkels.
  5. Fox's Den

    Fox's Den 22 years of racing the same 355 Buick motor

    the original GS air cleaner hood scoops do not work and actually "Suck" air from the carb under speed. The air over the hood pulls the air out. Yes, the GS hood scoop system is worthless.
    Paul Stewart likes this.
  6. Sebambam

    Sebambam Well-Known Member

    I ordered the Air Cleaner and i will report my experiences...
    will take some time since im still working on the Car as you see
  7. hugger

    hugger Well-Known Member

    An under bumper ram air setup is worth almost 3mph, I had one and it flat worked proven at the track 20mins apart with and without. From my experience anyway. Without test consisted of a dropbase open element
  8. Sebambam

    Sebambam Well-Known Member

    Yes i will try to mount it under the bumper to get some real cold air, just gotta figure out the mounting since i also have a GSX front spoiler for my 68'
  9. greatscat

    greatscat Well-Known Member

    I index race in 9.90 so Thumper is deadly consistent with a throttle stop. Last year I forgot to install the hood seal plate to the carb after changing the T-stop setting. even though there is a hood scoop, w/o the seal the car slowed .15 seconds and nearly 2 mph. Couldn't figure what happened until I realized the plate was missing.
  10. hugger

    hugger Well-Known Member

    Im working on a way to seal my stage 2 scoop now hope to see 2 more mph as well
  11. 69GS400s

    69GS400s own amusement ride!

    please post your source
  12. SteeveeDee

    SteeveeDee Orange Acres

    I read an article in Hot Rod magazine back in the early '70s which made the same claim regarding the GS hood scoops.
  13. Houmark

    Houmark Well-Known Member

    I'm also convinced that the air is being pulled out of the "holes" in the gs hood.. If the holes had a piece on top, forming a "tube" the air would have no other place to go other than down because of the air coming behind..

    Paul Stewart likes this.
  14. Mart

    Mart '71 350 GS, almost stock

    Maybe it would be better to just block the hood vents off completely?
    Most guys aren't using the stock GS cleaner setup anyway.
  15. Fox's Den

    Fox's Den 22 years of racing the same 355 Buick motor

    Sorry I can't post you a source I know I read it somewhere either in the GS mag or Hot Rod. Could have been in one of the other mags out there (Car Craft, Muscle Car Review), I am sure I heard it within the Buick crowd as a source. I think it had something to do with the way the air went over the hood and it created a suction as the air went by. The scoops are too far up the hood and that is the theory behind it.
  16. No Lift

    No Lift Platinum Level Contributor

    I would suggest staying away from the 180* inlet housing and go with a pieced together system using the 135* inlet system. The 180* will shoot the inlets toward the AC box causing some grief. Also I'm not that impressed by the air filter they use with the smaller housing so if I had the hood clearance I would have gone with the 15"(?) housing. At the track I remove the filter. I have a SP1 intake and to get the housing on there I used a typical drop baseplate and the filter that came with the housing. The base I used actually goes to the outside of the housing as you can see the aluminum rim around the bottom. The drop base that comes with the housing would normally fit closely inside the housing and you wouldn't even see it. My ThermoQuad carb really didn't fit the supplied drop base without lifting it up some. Also my housing was polished aluminum that I had powder coated. I used some Spectre parts but bought the hose separately and made the air inlets.

    Ram Air Spectre 2015-12-28 001r.jpg

    The biggest advantage of an outside air system is getting the cooler (compared to the engine compartment) air to the engine. The ram air effect wouldn't even get going until 100+ mph and then it is still not much but every bit counts.

    In my case the air intake is worth .1 and 1.5 MPH and my dual 4" hoses take a torturous route to get to the housing. IMO it is a no brainer because you are all but guaranteed to go faster as long as a good system is installed which is way better than lots of other things that people want to do to make their car faster and they only hope it is faster. If you go slower you've screwed something up or your carb was way on the lean side in the first place.

    As far as the GS hood goes the hood has a boundary layer of a few inches that is dead air once you are moving. About the only thing that is good about the GS hood scoop is that the air it is drawing in won't be as hot as the air underneath the hood. The problem is it will have to "draw" the air in which means it has more work to do than if there was a positive pressure at the inlet. The only good places to get air are at the front of the car, a few inches(or more) off the surface of the hood or at the cowl. The Pontiac Formulas and Hurts Olds hoods were good, some of the Cowl Induction hood were good as were a couple of the Chryslers with the taller hood scoops, like the 340 and 440 6 BBL cars.

    The other problem with even using a GS air cleaner housing is that ultimately the two inlets that make it to the housing itself are really not that big. If you measure them out each are right about the equivalent in area of a 2.5" circular opening which is about the size of ONE 3.5" opening. Better than a single opening snorkel but not too much better. It is pretty much common knowledge that if you want to go faster you always flip the lid on the air cleaner to let the air in. Ask Greg Gessler. His air cleaner housing looked stock but if you took it off it was opened up to let the air in from underneath indicating that hot under hood air is better than being starved for air.

    Larry's ram air has been discussed before:
  17. gsgtx

    gsgtx Silver Level contributor

  18. gsgtx

    gsgtx Silver Level contributor

    yes its a nice set up. this is the 180*, get the 150*=731 part#or 135*=732part# if you can. if you get the low profile one like I did you will need a 1/2 inch spacer on top of carb.
  19. No Lift

    No Lift Platinum Level Contributor

    GSGTX, what carb are you running? An AFB? The drop base must have a problem with the wider style carb. I am tight to the hood so I couldn't afford any less drop than it came with and that is why I changed the base.
  20. buicfrank

    buicfrank Well-Known Member

    I think you should run the 68 cowl induction. There is no warm air involved. Frank

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