Re: out with old headers
[Re: Thumperdart]
#1385185
02/10/13 11:34 PM
02/10/13 11:34 PM
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Joined: May 2011
Posts: 4,489 northern,Ohio,USA
Clanton
OP
master
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OP
master
Joined: May 2011
Posts: 4,489
northern,Ohio,USA
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You say they rob power? ![](/ubbthreads/images/graemlins/shruggy.gif) too small of a header would also and is what i had.
Last edited by Clanton; 02/11/13 05:00 PM.
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Re: out with old headers
[Re: Thumperdart]
#1385187
02/11/13 02:19 PM
02/11/13 02:19 PM
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Joined: May 2011
Posts: 4,489 northern,Ohio,USA
Clanton
OP
master
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OP
master
Joined: May 2011
Posts: 4,489
northern,Ohio,USA
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I am not talking about zoomies but I will have a collector on the ends. like these but they are not mine.
Last edited by Clanton; 02/11/13 02:23 PM.
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Re: out with old headers
[Re: Thumperdart]
#1385189
02/11/13 03:01 PM
02/11/13 03:01 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:
I hear ya on the room available w/fenderwell`s but I`ve also heard they rob a good amount of power compared to a standard header................... Either way, guess you could just turn up the boost...........
i suspect you might have been confused by those who say that hookers abody fenderwell headers cost them some power by having to long primarys,fenderwell headers are usualy alitle better since most of the time they can be made with bigger radius bends and less bends aswell compared to underchassies headers not always but usualy
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Re: out with old headers
[Re: FastmOp]
#1385195
02/11/13 05:41 PM
02/11/13 05:41 PM
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Joined: Jul 2005
Posts: 1,301 Penna
70satelliteguy
pro stock
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pro stock
Joined: Jul 2005
Posts: 1,301
Penna
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"I have picked up about .2 in the 1/8 so far with the headers posted above. That's over the hooker supercomps" Fastmop what size were those Supercomps? Thanks Mike ![](/ubbthreads/images/graemlins/beer.gif)
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Re: out with old headers
[Re: Cab_Burge]
#1385197
02/12/13 02:19 AM
02/12/13 02:19 AM
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Joined: Dec 2007
Posts: 12,592 Great Neck,LI,new york
hemi-itis
I Live Here
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I Live Here
Joined: Dec 2007
Posts: 12,592
Great Neck,LI,new york
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Quote:
I've used both types and sizes of headers on a engine dyno test, first set was a set of Hooker 1 7/8 fenderwells with 42 inch long primarys and 3.5 collectors, the second set was a custom set made by the dyno operator which ended up with 2 1/4 inch priamrys 25 inches long with a four inch collector. The motor was a 426 C.I. 9.5 to 1 compression ratio Max Wedge pump gas motor, the bigger pipes made more HP and torque from 4000 RPM up On your deal the bigger pipes will really help The first blower motor I assembled and dyno tested was a all aluminum KB 499 C.I. street Hemi with a 10.71 BDS blower and Fel Pro EFI, the headers where custom made for the car with 2 1/4 primarys, four inch collectrs and a full four inch exhaust with a H pipe and s set of Flow Masters on it That motor made 1300 +HP at 7300 RPM on the dyno Your pipes have some room to allow engine power growth
Cab,what boost level with the 1071?? ![](/ubbthreads/images/graemlins/1343795-scratchchin.gif)
HEMI-ITIS has no cure. My condition is fully BLOWN!!
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Re: out with old headers
[Re: hemi-itis]
#1385198
02/12/13 04:04 PM
02/12/13 04:04 PM
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Joined: Aug 2003
Posts: 43,359 Bend,OR USA
Cab_Burge
I Win
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I Win
Joined: Aug 2003
Posts: 43,359
Bend,OR USA
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Quote:
Quote:
I've used both types and sizes of headers on a engine dyno test, first set was a set of Hooker 1 7/8 fenderwells with 42 inch long primarys and 3.5 collectors, the second set was a custom set made by the dyno operator which ended up with 2 1/4 inch priamrys 25 inches long with a four inch collector. The motor was a 426 C.I. 9.5 to 1 compression ratio Max Wedge pump gas motor, the bigger pipes made more HP and torque from 4000 RPM up On your deal the bigger pipes will really help The first blower motor I assembled and dyno tested was a all aluminum KB 499 C.I. street Hemi with a 10.71 BDS blower and Fel Pro EFI, the headers where custom made for the car with 2 1/4 primarys, four inch collectrs and a full four inch exhaust with a H pipe and s set of Flow Masters on it That motor made 1300 +HP at 7300 RPM on the dyno Your pipes have some room to allow engine power growth
Cab,what boost level with the 1071??
I'm not sure what the boost levels ended up being with the new blower and Motech EFI, I was pulled off that project when it had a bad BDS blower and the Fel Pro EFI. That combination made 960 HP at 6500 RPM with 17 lbs of boost, we where not trying to make the most power then so we stop the pulls at 6500. There was issues with the EFI and the blowers not repeating from one run to another run BDS= Bad dang stuff ![](/ubbthreads/images/graemlins/whistling.gif)
Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
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