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Author
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Topic: 2" Primaries Too Large?
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Daniel Jones
Gearhead Posts: 872
From: St. Louis, MO
Registered: Aug 99
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posted 05-27-2004 08:36 PM
   
Looks like my Pantera is getting the exhaust shown here: http://www.geocities.com/teampanteralongisland/Exhaust1.html It's for C302B heads on a 9.2" deck block. Primaries are 2"
in diameter, collector is 3" in diameter as are the intermediate
pipes. The intermediate pipes Y-off to 4 individual (2 per side)
straight-through stainless mufflers. The ports on my C302B heads
are only 1 3/4" diameter but flowed 230 CFM (w/o a pipe) at 28"
pressure drop on a Superflow bench. Is there any benefit or
drawback to running 2" primary pipes? The engine will be around
410 cubic inches and 11:1 compression. Dan Jones BTW, the guy that makes the exhaust has them on his street-driven
1100 HP twin turbo Pantera (C302 heads, Fontana block, injection,
Schubeck lifters).
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kid vishus
Gearhead Posts: 6395
From: middle of NC
Registered: Oct 2000
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posted 05-27-2004 09:11 PM
I wouldn't think so. My 357 inch motor responded real well to 1 7/8" primaries, and in reality, probably could have used 2 1/8" primaries. If I ever build a stroker motor, it's getting at least 2" tubes, and hopefully 2 1/8" with a 3 1/2" collector.
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Moneymaker
Administrator Posts: 26811
From: Lyons, IL, USA
Registered: May 99
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posted 05-27-2004 11:52 PM
Clevelands like BIG tubes.  ------------------
Alex Denysenko
Co-Administrator and Moderator NHRA/IHRA/SRA member and licensed Superstock driver
MCA member# 53321
NHRA and IHRA SS/LA & SS/MA National Record Holder '00,'01,'02,'03,& '04
First SS/MA in the TENS!
IHRA division 5 Superstock Champion
Fleet of FoMoCo products including 88 ASC McLaren Mustang #28 The Barry of BarrysGrrl Quote #1: "I never met a magazine mechanic I liked."
Quote #2: "Make sure brain is in gear before engaging mouth!"
Quote #3: "If you can't run with the big dogs, stay on the porch!"
www.moneymakerracing.com
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Daniel Jones
Gearhead Posts: 872
From: St. Louis, MO
Registered: Aug 99
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posted 05-28-2004 03:17 PM
Thanks for the info guys. I'm glad to hear it since the 2" primaries will allow me to use a back-up longblock with A3 heads. They've got larger exhaust ports but the botl pattern is the same.Dan Jones
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jim1320
Gearhead Posts: 223
From: white plains, maryland, usa
Registered: Apr 2003
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posted 05-28-2004 04:25 PM
look great good luck jim1320------------------
1970 Mach 1 393 stroker cleveland best 10.88 @123.50 3550 lb car with exhaust have fun!!!
http://www.hardcore50.com/race_coverage/MIR-FordFeverClassic/2003/PICT0034.jpg
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Fastymz
Moderator Posts: 20638
From: Reno Nv USA M&M#1240
Registered: Apr 2001
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posted 05-28-2004 06:53 PM
I can't help you with your question. But they look great and thats one nice car. It must be a blast to drive. Do you find most people don't what kind of car it is ?------------------
oddly obsessed with big scoops on little Mustangs 65 coupe,351w,C4,Big Boss 429 hood scoop,8" 3.40 TracLoc. My Pics
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Daniel Jones
Gearhead Posts: 872
From: St. Louis, MO
Registered: Aug 99
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posted 05-28-2004 08:25 PM
> look great good luck jim1320Thanks! > I can't help you with your question. But they look great and thats one nice
> car. The one pictured with the exhaust isn't mine. That one is owned by Mark
Basile but has the exhaust I intend to use. My car is pictured at:
http://www.bacomatic.org/dan/Dans_Pantera.jpg I also thought about these 180 degree headers that are on a friend's car: http://tpoc.socalpantera.com/md_engine.htm He pulled 464 RWHP with a hydraulic roller cam (specs are wrong on the
page, it was 245 degrees @ 0.050" lift and 0.612" lift) and a 377C with
C302B heads. > It must be a blast to drive. It truely is. It just begs to be driven at grossly illegal speeds. > Do you find most people don't what kind of car it is ? Yes. Lots of questions asking if it's a Ferrari, Maserati, or
Lamborghini and the occasional "what kind of Volkswagon is that?"
Most are surprised to find it's a 30 year old car. Dan Jones
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Fastymz
Moderator Posts: 20638
From: Reno Nv USA M&M#1240
Registered: Apr 2001
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posted 05-28-2004 08:33 PM
Dan I knew that wasn't your car. His car is cool too. I've always liked the Pantera.
A Volkswagon 
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oddly obsessed with big scoops on little Mustangs 65 coupe,351w,C4,Big Boss 429 hood scoop,8" 3.40 TracLoc. My Pics
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Dad Vishus
Gearhead Posts: 913
From: Moscow, Iowa, USA
Registered: Dec 2001
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posted 05-28-2004 11:36 PM
2 inch primaries on my racecar. It seems to like them. Pulls hard right up through 7400 in high gear.Yeah Dan. Isn't this brute going to be an invitiation to Loose Your License University? Should be a fun ride.  ------------------
63 Falcon 377 Cleveland stroker Flying Toilet alchohol injection. 6.19 @ 110 MPH 1/8 mile
2002 Ranger FX4 daily driver
2000 F350 PSD Crew cab dually - Like commuting in a B52!!
98 US Cargo Phantom II 28'
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Daniel Jones
Gearhead Posts: 872
From: St. Louis, MO
Registered: Aug 99
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posted 05-30-2004 06:47 PM
> Yeah Dan. Isn't this brute going to be an invitiation to Loose Your
> License University? Heh, heh, heh. It will be an exercise in will power. Dan Jones
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