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Re: Anyone Running Stahl 2 1/8" headers on a BB A-Body?
[Re: GTSDave]
#550134
12/11/09 10:13 AM
12/11/09 10:13 AM
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Joined: Jan 2003
Posts: 16,930 NC
440Jim
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I Live Here
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Quote:
This is a 496" low deck with SR heads ( I have some CNC325's to put on later)
I found this old post info that was so amazing, I saved it. Every application can be different, but it seems close enough to consider. I would bet the ProParts would beat the Hooker fenderwells (long), but not the step header.
Quote:
Fast68plymouth dyno test, 493 CID Includes Hooker Super Comp A-body fenderwells (2" x 43") versus his dyno headers, stepped 2 to 2-1/8", 32" long (12" + 20")
test A-M1 4150/905 carb/1" open spacer/dyno headers
test B-M1 4150/1050 carb/2" adapter/dyno headers
test C-M1 4500/1050 carb/no spacer/dyno headers
test D-M1 4500/1050 carb/no spacer/ A body 2" headers
rpm--A/tq/hp---B/tq/hp----C/tq/hp---D/tq/hp 3700-----------------------------------------586/413 3800-----------------------------------------598/433 3900-----------------------------------------607/451 4000-521/397-------------------524/399---619/471 = +72 hp 4100-525/410---519/405----524/409---632/493 4200-555/444---533/426----545/436---631/505 4300-594/486---588/481----599/490---635/520 4400-605/507---594/498----617/517---636/532 4500-611/524---618/530----618/530---640/548 = +18 hp 4600-628/550---623/546----628/550---635/556 4700-632/565---634/567----630/564---635/568 = + 4 hp 4800-628/574---637/582----635/581---632/578 = - 3 hp 4900-630-587---632/589----634/592---626/584 5000-624/594---625/595----632/602---619/589 = -13 hp 5100-623/605---626/608----625/607---619/601 5200-617/611---622/616----624/618---612/606 5300-615/620---621/627----619/625---606/612 5400-609/626---620/637----609/626---599/616 5500-603/631---606/635----612/640---593/621 = -19 hp 5600-591/630---600/640----599/639---586/625 5700-587/637---600/651----597/648---578/627 5800-585/646---592/654----592/654---576/636 5900-578/649---589/661----584/656---560/629 6000-571/653---581/664----580/663---553/632 = -31 hp 6100-565/656---576/670----576/670---550/639 6200-557/658---567/669----560/661---538/635 6300-546/655---561/673----556/669---526/631 6400-541/660---549/669----544/663---516/629 6500-530/655---541/670----540/668---504/624 = -44 hp 6600-518/651---535/672----527/663---494/620 = -43 hp 6700-509/650---523/667----518/661---484/617 = -44 hp 6800--------------514/665----511/662---476/616 = -46 hp
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Re: Anyone Running Stahl 2 1/8" headers on a BB A-Body?
[Re: forphorty]
#550138
12/11/09 09:50 PM
12/11/09 09:50 PM
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Joined: Jan 2003
Posts: 16,930 NC
440Jim
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I Live Here
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A car with a race converter with a 5000-5500 stall speed would be better at any rpm the car sees on the track with the bigger/shorter header. But it is eye opening to see the trade off at low (street) rpm. My big block converter goes to 5400 when I mash the gas! Plus GTSDave (who this post is about) is talking about a 496 CID turning 7000 rpm. I think it is well over 500 hp and his converter should be in the range I am talking about. A 383 in a heavy car shifting at 5800 rpm would be better off with the smaller/longer header. But that is another topic.
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Re: Anyone Running Stahl 2 1/8" headers on a BB A-Body?
[Re: 440Jim]
#550139
12/12/09 12:38 PM
12/12/09 12:38 PM
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Joined: Jan 2003
Posts: 3,048 Richmond, Tx. (Houston)
GTSDave
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OP
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Richmond, Tx. (Houston)
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Jim, If it performs like the one we cloned, then it will be closer to 800hp and I dont have a converter, I have a clutch Great chart though. I would love to know more about the dyno headers they used. Even still, they hookers performance suprises me. So many people rag on the hookers, I never even considered them an option. -Dave
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Re: Anyone Running Stahl 2 1/8" headers on a BB A-Body?
[Re: GTSDave]
#550140
12/12/09 01:27 PM
12/12/09 01:27 PM
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Anonymous
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Anonymous
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Hooker S/C headers are the best performing headers I have had on my car.
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Re: Anyone Running Stahl 2 1/8" headers on a BB A-Body?
[Re: 440Jim]
#550141
12/12/09 01:30 PM
12/12/09 01:30 PM
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Joined: Dec 2005
Posts: 4,254 State of Fascism
52savoy
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master
Joined: Dec 2005
Posts: 4,254
State of Fascism
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Quote:
Read the chart carefully. The only difference between column C and D is the header swap.
ok..I see it now. That's for pointing it out.
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Re: Anyone Running Stahl 2 1/8" headers on a BB A-Body?
#550142
12/12/09 04:49 PM
12/12/09 04:49 PM
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Joined: Jan 2003
Posts: 16,930 NC
440Jim
I Live Here
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I Live Here
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Posts: 16,930
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Quote:
Hooker S/C headers are the best performing headers I have had on my car.
I don't think you are using the same part number headers that Hooker makes for the '68 Cuda BB, 43" long fenderwells.
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Re: Anyone Running Stahl 2 1/8" headers on a BB A-Body?
[Re: Ari440]
#550143
12/14/09 01:56 PM
12/14/09 01:56 PM
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Joined: Jan 2003
Posts: 6,840 The Swamp
Sixpak
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Quote:
Quote:
Quote:
those Stahl headers look a lot like Tubular Automotive headers except Tubular are 2"/3.5". With Tubular Automotive headers, clutch linkage can be in the stock location, easy to change plugs and good starter access. They were designed by Ed Hamburger and are supposed to be the the best flowing non-custom bb A-body headers.
... x2 i have a set i got from Muscle Motors a few years ago are made just like them from what i can see. and cost like 450 bucks.
do they work with indy heads
there are also HEDMAN HEADERS
any body use these
Tubular Auto headers will not work with an A body RB Indy SR combo without some work. I had to add about 2" to each pipe to get them under the car, and trim the web between the floor pan and outer rocker.
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