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Header tube size
#512677
10/31/09 06:14 PM
10/31/09 06:14 PM
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Joined: Apr 2004
Posts: 976
Woodstock , Georgia
Mopar_racer_99
OP
super stock
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OP
super stock
Joined: Apr 2004
Posts: 976
Woodstock , Georgia
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OK guys, I was bench racing today and was told my headers are too small. 2 1/8 by 30 into a 3 inch collector. 578 ci motor 440-1 heads making 914 hp at 6700 rpm ex opens at 92' bbdc. I went to wallace racing and the calculator was saying 2.45 dia by 28.64 lenght and a 4.65 collector. what are you running on your motors.John
8.72 @ 154.6 ,68 Charger 578ci 440-1s, 3000# w/drvr, 2150 den/alt NA
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Re: Header tube size
[Re: Mopar_racer_99]
#512678
10/31/09 06:26 PM
10/31/09 06:26 PM
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Joined: Feb 2007
Posts: 2,578
sweden
1Fast340
master
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master
Joined: Feb 2007
Posts: 2,578
sweden
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Quote:
OK guys, I was bench racing today and was told my headers are too small. 2 1/8 by 30 into a 3 inch collector. 578 ci motor 440-1 heads making 914 hp at 6700 rpm ex opens at 92' bbdc. I went to wallace racing and the calculator was saying 2.45 dia by 28.64 lenght and a 4.65 collector. what are you running on your motors.John
im not an expert but primarys sounds like they are on the limit, but those collectors must hold you back i would say minimum 3½" collectors if you are also going to hook it up to some kind of streetexhaust otherways i would think 4"collectors would be just right, will be intresting to see what the more knowledgable guys will say about it 
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Re: Header tube size
[Re: Mopar_racer_99]
#512679
10/31/09 07:09 PM
10/31/09 07:09 PM
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Joined: Apr 2005
Posts: 1,880
USA
Ron Silva
top fuel
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top fuel
Joined: Apr 2005
Posts: 1,880
USA
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Did you run that same header on the dyno?
Is that a merged collector? I can see the "pinch" of a merged collector being 3", but not the cone or straight section after the primaries.
SRT DEMON ONE SEAT
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Re: Header tube size
[Re: Ron Silva]
#512680
10/31/09 07:20 PM
10/31/09 07:20 PM
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Joined: Apr 2004
Posts: 976
Woodstock , Georgia
Mopar_racer_99
OP
super stock
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OP
super stock
Joined: Apr 2004
Posts: 976
Woodstock , Georgia
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Yes the headers were the ones run on the dyno, and I did have a typo on collector it is a 3 1/2 inch slip on collector. JOhn
8.72 @ 154.6 ,68 Charger 578ci 440-1s, 3000# w/drvr, 2150 den/alt NA
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Re: Header tube size
[Re: 70satelliteguy]
#512682
10/31/09 08:22 PM
10/31/09 08:22 PM
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Joined: Apr 2004
Posts: 976
Woodstock , Georgia
Mopar_racer_99
OP
super stock
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OP
super stock
Joined: Apr 2004
Posts: 976
Woodstock , Georgia
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The car has a one piece lift off nose and full alum interior, lexan windows, strut front with a 4 link back half, mild steel cage. I wish I could get mine down to what sean's charger weighs. John
8.72 @ 154.6 ,68 Charger 578ci 440-1s, 3000# w/drvr, 2150 den/alt NA
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) I run a 2-1/8 step header with my 572 Indy motor but I weigh in at 3580 in my Sport Satellite with driver!
