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Re: Headers for my 499" B1MC headed Bonneville bullet [Re: mopar dave] #2654215
05/11/19 12:35 AM
05/11/19 12:35 AM
Joined: Oct 2009
Posts: 200
near St Petersburg, FL
Lifsgrt Offline OP
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Lifsgrt  Offline OP
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Joined: Oct 2009
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near St Petersburg, FL
Finished my first set of headers a while back. 2 1/4" to 2 3/8" with 4" collectors. Just sent them to Jet Hot for coating!

0301191026.jpg

B3 1969 Charger R/T SE, 440/727 with 3:91s running 11.07@120
Re: Headers for my 499" B1MC headed Bonneville bullet [Re: Lifsgrt] #2654216
05/11/19 12:41 AM
05/11/19 12:41 AM
Joined: Oct 2009
Posts: 200
near St Petersburg, FL
Lifsgrt Offline OP
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Lifsgrt  Offline OP
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Right side. This one removes with only removing a couple of the plugs. Driver's side requires removing steering column and starter, plus a couple plugs. At least I don't have to move the engine!

0222191650.jpg

B3 1969 Charger R/T SE, 440/727 with 3:91s running 11.07@120
Re: Headers for my 499" B1MC headed Bonneville bullet [Re: Lifsgrt] #2654218
05/11/19 12:49 AM
05/11/19 12:49 AM
Joined: Jun 2003
Posts: 51,593
Romeo MI
MR_P_BODY Offline
Master
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Romeo MI
If you do a couple of things to them you will save them from cracking..
cut each tube where they are tied together and drill one of the 2 holes
on each tube a little bigger(doesnt matter what size hole).. that way they
can grow with the heat( they will expand so they need to slide a bit)
or they worp .. looks good.. I built a ton of headers at Chrysler
EDIT
this is a set I built for my W-9.. totally equal on all tubes
wave

W9_4.jpg
Last edited by MR_P_BODY; 05/11/19 01:00 AM.
Re: Headers for my 499" B1MC headed Bonneville bullet [Re: MR_P_BODY] #2654431
05/11/19 09:36 PM
05/11/19 09:36 PM
Joined: Oct 2009
Posts: 200
near St Petersburg, FL
Lifsgrt Offline OP
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Lifsgrt  Offline OP
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near St Petersburg, FL
Mr P Body, you're saying cut the flange between the tubes?


B3 1969 Charger R/T SE, 440/727 with 3:91s running 11.07@120
Re: Headers for my 499" B1MC headed Bonneville bullet [Re: Lifsgrt] #2654440
05/11/19 10:11 PM
05/11/19 10:11 PM
Joined: Jun 2003
Posts: 51,593
Romeo MI
MR_P_BODY Offline
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Romeo MI
Originally Posted by Lifsgrt
Mr P Body, you're saying cut the flange between the tubes?


Yes I am.. after you trim them up nicely then drill one bolt hole a little
larger per tube
wave

Re: Headers for my 499" B1MC headed Bonneville bullet [Re: MR_P_BODY] #2654453
05/11/19 11:00 PM
05/11/19 11:00 PM
Joined: Jan 2008
Posts: 2,363
Cotati, CA
Dave Hall Offline
top fuel
Dave Hall  Offline
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Cotati, CA
Mr. P! Check out those flanges he's using. I wouldn't cut them. Elongate the holes and be done. The only time I have cut flanges is for ease of R&R. Nice job Lifsgrt!

Re: Headers for my 499" B1MC headed Bonneville bullet [Re: Dave Hall] #2654456
05/11/19 11:13 PM
05/11/19 11:13 PM
Joined: Jun 2003
Posts: 51,593
Romeo MI
MR_P_BODY Offline
Master
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Romeo MI
Originally Posted by Dave Hall
Mr. P! Check out those flanges he's using. I wouldn't cut them. Elongate the holes and be done. The only time I have cut flanges is for ease of R&R. Nice job Lifsgrt!


Still gonna need to cut them.. they may worp in those areas or not..
but if you cut them that guarantees that they move.. just needs the
bigger hole in each tube
wave

Re: Headers for my 499" B1MC headed Bonneville bullet [Re: Lifsgrt] #2654482
05/12/19 01:19 AM
05/12/19 01:19 AM
Joined: Aug 2003
Posts: 34,543
Bend,OR USA
C
Cab_Burge Offline
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Bend,OR USA
Do you think the collectors need to be that long for that motor and the racing your doing?
What are your plans for the operating range in RPM for that motor off of the push car?


Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
Re: Headers for my 499" B1MC headed Bonneville bullet [Re: Dave Hall] #2660981
05/31/19 03:32 PM
05/31/19 03:32 PM
Joined: Oct 2009
Posts: 200
near St Petersburg, FL
Lifsgrt Offline OP
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Lifsgrt  Offline OP
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near St Petersburg, FL
Thanks Dave!


B3 1969 Charger R/T SE, 440/727 with 3:91s running 11.07@120
Re: Headers for my 499" B1MC headed Bonneville bullet [Re: Cab_Burge] #2660983
05/31/19 03:35 PM
05/31/19 03:35 PM
Joined: Oct 2009
Posts: 200
near St Petersburg, FL
Lifsgrt Offline OP
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Lifsgrt  Offline OP
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Joined: Oct 2009
Posts: 200
near St Petersburg, FL
Hey Cab, I had not cut the collectors in these pics and they were still 18" long. I cut them at 13.4" from the ends of the tubes based on Pipemax data and other input I received prior to shipping them to Jet Hot for coating. It will be interesting to see how much steam this engine makes with my first effort at headers!


B3 1969 Charger R/T SE, 440/727 with 3:91s running 11.07@120
Re: Headers for my 499" B1MC headed Bonneville bullet [Re: Lifsgrt] #2755013
03/23/20 01:14 PM
03/23/20 01:14 PM
Joined: Oct 2009
Posts: 200
near St Petersburg, FL
Lifsgrt Offline OP
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Lifsgrt  Offline OP
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Joined: Oct 2009
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near St Petersburg, FL
Hey guys, update on my 498" Bonneville bullet using THE Block. I cut the collectors to 13.4" and had them Jet Hot coated. Finally got it on the dyno at Best Machine. This endurance build with a single Quick Fuel Dominator made 947hp at 7400rpm and 690tq at 6800rpm through my first time built 2 1/4"-2 3/8"-4" collector stepped headers that fit inside the frame rails of my Daytona clone. I now wish I'd have gone with the recommendation of a 4 1/2" collector. Engine ran better with a 4" to 5" adaptor on the collector. I tried 4" extensions at 54" long in hopes of getting the exhaust out from under yhe car for speed runs and it killed 35 hp. Will try 5" extensions and see if that works.


B3 1969 Charger R/T SE, 440/727 with 3:91s running 11.07@120
Re: Headers for my 499" B1MC headed Bonneville bullet [Re: Lifsgrt] #2756097
03/26/20 02:29 AM
03/26/20 02:29 AM
Joined: Oct 2009
Posts: 200
near St Petersburg, FL
Lifsgrt Offline OP
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Lifsgrt  Offline OP
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Joined: Oct 2009
Posts: 200
near St Petersburg, FL
Dyno info.

Thanks again for the input, I appreciate it. Got the flanges, collectors, and other tubing bits and pieces from http://www.spdexhaust.com/ They have custom flanges that fit these Brodix B1 MC heads very well.

Dyno Chart 498 Sept 2019.jpgDyno sheet Sept 2019 498.jpg

B3 1969 Charger R/T SE, 440/727 with 3:91s running 11.07@120
Re: Headers for my 499" B1MC headed Bonneville bullet [Re: Lifsgrt] #2756277
03/26/20 07:59 PM
03/26/20 07:59 PM
Joined: Jan 2003
Posts: 15,868
Western NC
440Jim Offline
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Western NC
I enjoyed this topic! wave


1993 Daytona, 1973 Cuda 440, 2009 Challenger 5.7 Hemi, 2015 RAM 1500 5.7 Hemi 8-speed auto
Re: Headers for my 499" B1MC headed Bonneville bullet [Re: 440Jim] #2756281
03/26/20 08:13 PM
03/26/20 08:13 PM
Joined: Mar 2006
Posts: 2,553
Mt. Eden Ky.
Hemi Allstate Offline
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Mt. Eden Ky.
Originally Posted by 440Jim
I enjoyed this topic! wave



iagree Cool project and goals ! beer

Mark


http://marsh-racing.com/Mark%20Mahorney-Allstate.htm
1996 Ram 1500 Sport
1968 road runner
1952 Sears Allstate licensed, pump gas, Hemi 5.98 @ 115.73 1.33 60 ft. The best is yet to come. Painless Performance / Street RODDER magazine Top 100 for 2019
Re: Headers for my 499" B1MC headed Bonneville bullet [Re: Lifsgrt] #2756329
03/26/20 10:47 PM
03/26/20 10:47 PM
Joined: Aug 2003
Posts: 34,543
Bend,OR USA
C
Cab_Burge Offline
I Win
Cab_Burge  Offline
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C

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Posts: 34,543
Bend,OR USA
It wouldn't surprise me one bit if the car ran faster with longer collector extension instead of a lot shorter one scope
All the 4 speed cars I drag raced ran quicker and faster with longer collectors, which wasn't suppose to work up shruggy work
Take a set along and test them if and when you can up twocents


Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
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