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What size headers tubes on your B1 combo's

Posted By: pittsburghracer

What size headers tubes on your B1 combo's - 01/29/15 11:45 PM

B1 heads only please but I am soon going to be having a set of headers made for my B1 headed 572. Probably going to be a stepped header type design but what are you guys running. This will be for a nitrous combo. Thanks
Posted By: Biginchmopar

Re: What size headers tubes on your B1 combo's - 01/30/15 12:11 AM

2 3/8 - 2 1/2 step x 4 1/2 collector on a 511 B1

Posted By: Al_Alguire

Re: What size headers tubes on your B1 combo's - 01/30/15 12:18 AM

My 525 junker is 2 1/4 to 2 3/8 with a collector muffler.
Posted By: a493demon

Re: What size headers tubes on your B1 combo's - 01/30/15 12:22 AM

3in. to 8in. collector.
Posted By: camastomcat

Re: What size headers tubes on your B1 combo's - 01/30/15 12:24 AM

2 1/4-2 3/8 4 1/2 collector
Posted By: MR_P_BODY

Re: What size headers tubes on your B1 combo's - 01/30/15 12:59 AM

Quote:

B1 heads only please but I am soon going to be having a set of headers made for my B1 headed 572. Probably going to be a stepped header type design but what are you guys running. This will be for a nitrous combo. Thanks



Max RPM is also part of the equation and the amount
your gonna hit it with.. if I were home I could run
your engine through my header program to tell you
what you need.... but I cant.. its on my other puter
Posted By: a493demon

Re: What size headers tubes on your B1 combo's - 01/30/15 01:13 AM

http://www.wallaceracing.com/header_length.php
Posted By: MR_P_BODY

Re: What size headers tubes on your B1 combo's - 01/30/15 01:25 AM

Quote:

http://www.wallaceracing.com/header_length.php



I wouldnt base my headers on that.. it has a good
bit of the info needed but it sure doesnt ask all
of the data needed... I've been using the header max
program for years and have tested it on the dyno
Posted By: Dartsport540

Re: What size headers tubes on your B1 combo's - 01/30/15 01:53 AM

505 cu. in. with stainless step headers, 2" - 2-1/8" to 2-1/4" . Merge collectors. Shift at 6100, and cross the traps at 6700rpm.
Posted By: Mopar-Al

Re: What size headers tubes on your B1 combo's - 01/30/15 02:24 AM

2 3/8 x 4.5 572
Posted By: go green

Re: What size headers tubes on your B1 combo's - 01/30/15 03:25 AM

I did 2.375" on my Coronet years ago and would never do it again . I don't care what some calculator says , it has to fit in car.A 2.25" would work just as good and it is way easier to buy and find in stainless or carbon . The B1 is only a 1.78" valve so its not fooling anybody by putting a macho pipe in it.

Posted By: fishy340

Re: What size headers tubes on your B1 combo's - 01/30/15 04:08 AM

Don't really Matter if you spray it hard..:)
Posted By: dvw

Re: What size headers tubes on your B1 combo's - 01/30/15 04:36 AM

Though not a B-1 Chuck from best did a header test a while back and posted it. I believe it was an 572 -1. The smaller 2 1/8" were better until the very end of the range like 6000-6500
Doug
Posted By: Mopar-Al

Re: What size headers tubes on your B1 combo's - 01/30/15 04:44 AM

The only 2 chassis headers I have is 2 1/8 and 2 3/8 If I had 2 1/4 I'd try them, but they just don't give them away
Posted By: pittsburghracer

Re: What size headers tubes on your B1 combo's - 01/30/15 05:36 AM

Thanks guys. Just got back home from a night out with my Son. I will study this and get planning.
Posted By: 440Jim

Re: What size headers tubes on your B1 combo's *DELETED* - 01/30/15 09:15 PM

Post deleted by 440Jim
Posted By: bigtimeauto

Re: What size headers tubes on your B1 combo's - 01/30/15 09:28 PM

i run 2.25 on my dart. i went from tti 1.125 on my engine without the blower and with and it didn't see anything on the chassis dyno
Posted By: 440Jim

Re: What size headers tubes on your B1 combo's - 01/30/15 09:32 PM

Quote:

Though not a B-1 Chuck from best did a header test a while back and posted it. I believe it was an 572 -1. The smaller 2 1/8" were better until the very end of the range like 6000-6500
Doug

I think I found it with the search:
https://board.moparts.org/ubbthreads/show...rue#Post8275911

572 Wedge, 440-1 345CNC Bracket Engine. Dyno Results
Indy Alum Block
Indy 440-1 345CNC Heads
Indy 440-3X Intake
Quick Fuel 2.125 4500 Carb Re done by Bob Book
HVH 2” Spacer
T&D Single Shaft Rockers 1.6 / 1.6
BMBBR5 Roller Cam 283 on a 115
Jesel Belt Drive
Race Tec Pistons 15 to 1 .043/.043

758 tq at 5700, 939 hp at 7400, TTI Headers 2.125 x 3.5
728 tq at 5900, 946 hp at 7100, 2.125 to 2.375 to 2.500 with a 5" collector

Attached picture 8412836-Dyno_572_Headers.jpg
Posted By: Al_Alguire

Re: What size headers tubes on your B1 combo's - 01/30/15 10:20 PM

A 5" collector that is simple Redonculous
Posted By: steve660

Re: What size headers tubes on your B1 combo's - 01/31/15 04:33 AM

Interesting post. Im having 622 with PSO heads built and will need headers. It is a pump gas engine with shift points around 7000ish in a 72 Barracuda. Have been told TTI 2"-2 1/8" step with 3 1/2 collector will be enough. Im kinda skeptical about them. If need be ill have custom ones made.
Posted By: fishy340

Re: What size headers tubes on your B1 combo's - 01/31/15 06:57 AM

Quote:

Interesting post. Im having 622 with PSO heads built and will need headers. It is a pump gas engine with shift points around 7000ish in a 72 Barracuda. Have been told TTI 2"-2 1/8" step with 3 1/2 collector will e enough. Im kinda skeptical about them. If need be ill have custom ones made.



Exactly what my sb w9 headers are.
Posted By: RAMM

Re: What size headers tubes on your B1 combo's - 01/31/15 03:53 PM

Quote:

I did 2.375" on my Coronet years ago and would never do it again . I don't care what some calculator says , it has to fit in car.A 2.25" would work just as good and it is way easier to buy and find in stainless or carbon . The B1 is only a 1.78" valve so its not fooling anybody by putting a macho pipe in it.





This is good advice ^^^^^. I would also advise against anything bigger than a 4" collector. J.Rob
Posted By: racerx

Re: What size headers tubes on your B1 combo's - 01/31/15 06:13 PM

Quote:

Quote:

I did 2.375" on my Coronet years ago and would never do it again . I don't care what some calculator says , it has to fit in car.A 2.25" would work just as good and it is way easier to buy and find in stainless or carbon . The B1 is only a 1.78" valve so its not fooling anybody by putting a macho pipe in it.





This is good advice ^^^^^. I would also advise against anything bigger than a 4" collector. J.Rob

It does make a lot of sense
Posted By: Gary Robbins

Re: What size headers tubes on your B1 combo's - 01/31/15 06:13 PM

Quote:

B1 heads only please but I am soon going to be having a set of headers made for my B1 headed 572. Probably going to be a stepped header type design but what are you guys running. This will be for a nitrous combo. Thanks



John,
Mines 2 1/2" with 5" collectors...Not saying you need this size,but know one has been faster with B1 originals than us with our/your type car...Your gonna have more torque than you can use at the start and can use all the HP it can make out the back door !!

Just sayin !!

Attached picture 8413854-FISH1034.jpg
Posted By: pittsburghracer

Re: What size headers tubes on your B1 combo's - 01/31/15 06:26 PM

Quote:

Quote:

B1 heads only please but I am soon going to be having a set of headers made for my B1 headed 572. Probably going to be a stepped header type design but what are you guys running. This will be for a nitrous combo. Thanks



John,
Mines 2 1/2" with 5" collectors...Not saying you need this size,but know one has been faster with B1 originals than us with our/your type car...Your gonna have more torque than you can use at the start and can use all the HP it can make out the back door !!

Just sayin !!





Thanks again guys. I have more room than I thought I would but shes not bolted in yet.

Posted By: dvw

Re: What size headers tubes on your B1 combo's - 01/31/15 09:51 PM

Quote:

Quote:

B1 heads only please but I am soon going to be having a set of headers made for my B1 headed 572. Probably going to be a stepped header type design but what are you guys running. This will be for a nitrous combo. Thanks



John,
Mines 2 1/2" with 5" collectors...Not saying you need this size,but know one has been faster with B1 originals than us with our/your type car...Your gonna have more torque than you can use at the start and can use all the HP it can make out the back door !!

Just sayin !!


For your type of car Gary makes a very good argument. If you have to pull power anyway you might as well gain it on the top. I was thinking slow tanks like mine that need the torque.
Doug
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