General Category > Quadrajet Carb Talk and Tips
Intake manifolds
lightning boy:
Hey Old Cars, take a break. although everyone appreciates your extensive "research".
There are some very smart people on this forum who legitimately try to help someone with a problem
There are plenty of other forums where people like to banter back and forth with their expertise, which most often is nothing more than an opinion.
Chill out!
Cliff Ruggles:
I for one like to see DIRECT testing vs googling up your information from Internet sources.
Putting up 2nd or 3rd hand information then referencing someone "famous" like Dave Vizard doesn't cut it. Just because you are taking warm showers with someone who does some great things doesn't make you a great person.....IMHO. Nothing wrong with using their input to make your own engines run better and cars quicker, but using that information in discussions to argue the efforts of others DOES NOT CUT it here and will not be tolerated.
I have been lenient with Old Cars and allowed three personal attacks. I couldn't imagine putting a comment in public Forum on a persons website that a part he spent many thousands of dollars on to develop to better this industry isn't any better than a part that isn't worth two squirts of duck poop from a parts store. Who would say something like that right to start with ESPECIALLY if they hadn't tested the part in question......not to mention I do this for a living and sell these parts to pay my bills and keep this website afloat.
Then to tell the same person he doesn't know how to pick camshafts, really? IF you think that's true take a gander at the attached dyno runs where I was asked to help a speed shop owner/engine builder/dyno operator how to improve power numbers and get his fresh 455 from pinging on hard pulls.
IF I believed everything I read or heard from others about what works and doesn't work with these things I'd never have made it this far in the hobby or as a business.
Just watching Anthony Mauro's "hemi killer" in the link above clearly shows us how good factory parts can be. Who would have ever thought back in the late 60's and early 70's that Pontiac build using a factory intake/Quadrjajet (almost everyone at that time called them "Quadra-junk") could even run close to Chryslers 426 Hemi with it's two four barrel intake topped with AFB carburetors?
The 426 hemi has every advantage, hemispherical combustion chambers, better intake port layout with HUGE runners, stronger block, crank, rods, over-square design, etc. Yet a Pontiac engine with a single cast iron 4bbl intake outruns it!
Before someone cries "foul" because of FAST Class rules keep in mind that Rick Mahoney's 400 powered 1968 Ram Air II Firebird runs at the top of the pile in Pure Stock as well. I also do the carburetors for Rick as he has several Pontiac cars that race in FAST and PURE stock and has been a customer for close to 20 years now.........Cliff
qjetsrule:
Not to mention the Firebird is giving up almost 30 cubes to the hemi. Mr. Mauro must be an incredible tuner/driver. Those Ram Air Firebirds are lethal.
Mudsport96:
From my own personal experience with my 350, i went from a stock iron intake to a Performer. Then to a Torker 2 then a STREET dominator and now i have the first iron intake back on the engine. Albeit i ported it fairly heavily and opened the plenum up like a aftermarket style. It idles and drives so much better than the others. I dont have a big cam and it is done at 5000 so that is a consideration, but it seems to pull better everywhere vs the others.
Would like to try a factory gm 80s aluminum intake as well.
Cliff Ruggles:
The SBC intakes, iron and aluminum are based on the same basic design, even the EGR versions.
I ran a stock one decades ago to his 11's sitting on a high winding 283 based engine (3" stroke) powering my 1965 Nova SS.
I tried several other intakes on that combo and found that the only intake that ran faster was a single plane Street Domintor with a 1" spacer on it. It didn't go any quicker in ET giving up quite a bit of 60' and short times but it did pull like gangbusters in the upper mid-range and top end. I shifted that engine at 7200-7500rpm's and went thru end of the 1/4 miles in that range as well. My converter only flashed to about 3800rpms which is a little low for that sort of engine/drivetrain combo so it didn't whack the tires really hard and left nice making it an excellent bracket car.
I'm probably the only one you will ever hear from that has actually back to back tested half a dozen intake on the same outing at the track. Have done back to back dyno testing as well. It's pretty easy on a Pontiac engine as I remove the water crossover and put some car past wax on the gaskets to the intake lifts right off. I can swap one out in less than 10 minutes.
Even on my the current 455 engine making over 550hp and the old 455 making around 1hp/CID I see gains in 60' and thru the 1/8th mile with the factory cast iron, 455 HO and RPM intakes compared to the single plane Street Dominator, Torker 1, Torker II and Tomahawk single plane intakes. The engine dyno verifies the power losses below 4500rpm's and stronger top end charge up near the shift point with the single plane intakes, except for the Torker 1. It's a complete TURD on everything we've tested it on.
Ran the Torker 1 once on the dyno back to back against my iron intake on a 455 build we did here and it was down 59 HP! Yes, not a typo, without a spacer we saw a 59hp drop swapping it out on the dyno.
The track testing verified those numbers on Ray's Firebird going from 12.20'a at 109-110mph to 11.70-11.80's at 112-114mph. Never did figure that one out but I'm thinking the big "shelf" under the primaries to impede "fuel impingement creates turbulence without at least a 1" spacer in place.
No one reading this would know about all that because they don't back to back test these things, just assume the aftermarket intakes are an improvement because the manufacturers tell us they are.......FWIW.......
Navigation
[0] Message Index
[#] Next page
[*] Previous page
Go to full version