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May 20th, 2008, 06:51 PM
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Cylinder Head Down Nozzles?
I was looking at some AllPro heads and one option was down nozzles. What are they? Something to do with the exhaust port?
I can't find anything on the web about it. http://www.allproheads.com/images%20...%20Cat2-08.pdf
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87 gn, Champion heads, 4 billet caps and a girdle. Turbonetics T66 4 bolt with custom 4" downpipe , FAST B/B W/WB02, PTE 210 roller cam, th400 w/trans brake. 525 RWHP @21 psi on a mustang dyno. Current best et 1.465 60',4.176 @83.33 330', 6.455@105.81 1/8 mile. http://www.youtube.com/watch?v=OXNeK7HIYNY In process of SBC turbo build with 88mm Turbo 
    
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May 21st, 2008, 07:25 AM
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I "believe" its something they use on roundy round applications. For street driving and drag racing its not needed.
All Pros are some of the best 23* heads out there. But If you are looking at 1000 to 1200 hp, regular 23* heads will do the job and save you big $$$
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http://community.webshots.com/user/10secv6  1987 Buick Grand National Turbo V8 in progress. Dart 400ci SBC, PTE106,PTE 2000 liquid IC,FAST XFI, Wolfe-TRZ rear suspension,PTC Powerglide and converter 1989 Pontiac TTA
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July 12th, 2008, 12:11 PM
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I think those are used on alcohol engines. Popular in the circle track scene.
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Donnie Wang 1984 BUICK Grand National with a baaad alcohol and nitrous chaser habit. 100% Methyl Alcohol Injected/Nitrous Oxide Assisted/Forced Inductions FI91X Turbocharged/TA Performance blocked/M&A headed/DRW TH475 Transmission/Neal Chance Racing Converters Pro Mod Torque Converter/Moser Engineering 12 Bolt Rear Axle Housing Warning: Do not try this at home without proper adult supervision. Ultimate Stage I BUICK V6 v3.2 GN details 9.19@145 from a 224 CID 5.73@122.1 in the 1/8 mile. Latest best. 1.28 60 foot. 'Perseverence is the key to innovations endless possibilities and varieties locked within each of us.'
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