Headers you can live with?
#2628350
03/03/19 06:02 PM
03/03/19 06:02 PM
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Joined: Jan 2003
Posts: 28,067 Irving, TX
feets
OP
Senior Management
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OP
Senior Management
Joined: Jan 2003
Posts: 28,067
Irving, TX
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I'm looking at a set of headers for the Imp. The factory exhaust manifolds are not compatible with Edelbrock heads so a change is required.
Keep in mind that I'm building an ultra heavy, quiet, and comfortable car for cross country road trips. The engine combo on paper (okay, my old dyno software) should be pushing 450+ torque from 2000 to 5200 rpm and tickle 500 lb/ft from 3500 to 4500. Power should be 400+ from 4500 to 6000, peaking around 440 between 5000 and 5500. I'm really doubting the intake will pull those higher rpm numbers but the fat mid-range looks tasty. Saddle that engine to a drivetrain and power at the ground will be significantly lower.
The headers I'm looking at are: 1) Hedman shorties 2) TTi shorties 3) Schumacher Tri-Y 4) TTi full length 1-3/4
The requirements: 1) Must fit angle plug Eddy heads in a C body. 2) Quality stuff that won't leak. 3) No ground clearance issues. 4) Ease of servicing plugs and starter.
The car: 5300 lb luxo-barge highway cruiser Power steering Power brakes Column shifter 3.23 gears 29" tire Stock converter 727 (46RH swap planned)
The combo: 440 std bore 10.2:1 compression Edelbrock Performer 88cc heads Comp 261/.463 cam 106 center line 110 separation CH4B intake (low hood clearance) Eddy carb (to be replaced by FiTech)
Which set of headers would best fit the bill? I was thinking about the Hedman shorties for an easy way out but the TTi shorties and Tri-Ys are looking pretty good. Sadly, I do not have any experience with any of these headers.
We are brothers and sisters doing time on the planet for better or worse. I'll take the better, if you don't mind. - Stu Harmon
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Re: Headers you can live with?
[Re: feets]
#2628489
03/03/19 11:46 PM
03/03/19 11:46 PM
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Joined: Jan 2003
Posts: 5,138 East Aurora (Buffalo) NY
RoadRunner
master
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master
Joined: Jan 2003
Posts: 5,138
East Aurora (Buffalo) NY
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I only have one data point for you, but the TTis I installed on my Road Runner with a Hemi fit perfectly. No power steering, but it is a 4 speed car. Only issue I had was having to use aftermarket oil dipstick tube. If I had been smart, I would have bent up a new tube and used stock dipstick. I am also using a mini starter.
68 Road Runner (383/4speed, post car w/decor pkg) - Major Project 69 Road Runner w/472 Hemi & 4 speed. 70 Challenger R/T SE EF8 w/ V9J, U - A32 - Major Project 2023 Ford Mach 1
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Re: Headers you can live with?
[Re: Grizzly69]
#2628526
03/04/19 12:48 AM
03/04/19 12:48 AM
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Joined: Jan 2003
Posts: 28,067 Irving, TX
feets
OP
Senior Management
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OP
Senior Management
Joined: Jan 2003
Posts: 28,067
Irving, TX
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You'll need to confirm that C body headers will fit an Imperial.
The front subframe on an Imperial is about 3 inches longer than the subframe on a C body.
The wheelbase is 2 inches longer. That puts the engine somewhat farther away form the suspension than a C body. The torsion bar anchor crossmember is in the same place. Overall, the car is about 5 inches longer than a New Yorker but is essentially the same from the firewall back.
We are brothers and sisters doing time on the planet for better or worse. I'll take the better, if you don't mind. - Stu Harmon
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Re: Headers you can live with?
[Re: feets]
#2628529
03/04/19 12:57 AM
03/04/19 12:57 AM
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Joined: Nov 2005
Posts: 1,943 San Angelo, Texas, U.S.A.
1968RR
top fuel
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top fuel
Joined: Nov 2005
Posts: 1,943
San Angelo, Texas, U.S.A.
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My vote is for the full-length TTI headers. I had to buy TTIs back when I installed Indy SR heads and they were the only ones that made headers that would fit my application. The price made cringe, but I didn't have a choice. They fit like a glove. The quality is great, and I've yet to hear anyone complain about TTI. It's been about 10 years or so since I ordered my headers, but don't they offer a Moparts-member discount? (The shruggy emoji is for real - I don't remember if they offer a discount or not.)
"When I'm in a slump, I comfort myself by saying if I believe in dinosaurs, then somewhere, they must be believing in me. And if they believe in me, then I can believe in me." - Mookie Wilson
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Re: Headers you can live with?
[Re: feets]
#2628536
03/04/19 01:35 AM
03/04/19 01:35 AM
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Joined: Nov 2005
Posts: 237 USA
Grizzly69
enthusiast
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enthusiast
Joined: Nov 2005
Posts: 237
USA
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You'll need to confirm that C body headers will fit an Imperial.
The front subframe on an Imperial is about 3 inches longer than the subframe on a C body.
The wheelbase is 2 inches longer. That puts the engine somewhat farther away form the suspension than a C body. The torsion bar anchor crossmember is in the same place. Overall, the car is about 5 inches longer than a New Yorker but is essentially the same from the firewall back. When I had my 72 Imperial, I was planning on putting headers and dual exhaust on it. But nobody could confirm to me that C body headers would work. I've since sold the Imperial to concentrate my automotive efforts on my Chargers. (Only so much hobby time and money to go around.) I'm interested to see how this works out for you...I might just wind up with another Imperial some day.
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Re: Headers you can live with?
[Re: Lee446]
#2628547
03/04/19 02:15 AM
03/04/19 02:15 AM
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Joined: Jan 2003
Posts: 28,067 Irving, TX
feets
OP
Senior Management
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OP
Senior Management
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Posts: 28,067
Irving, TX
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Feets, can the HP manifolds from 69-70 B&E bodies fit the IMP engine bay? I ask , because I have a rb 493 on the stand with E-heads and these manifolds clear the angle plug heads just fine. I think there's an issue with the driver's side exit. The passenger side works fine. I'm hoping that headers will open up a bit more torque for me.
We are brothers and sisters doing time on the planet for better or worse. I'll take the better, if you don't mind. - Stu Harmon
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Re: Headers you can live with?
[Re: feets]
#2628560
03/04/19 03:40 AM
03/04/19 03:40 AM
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Joined: Jan 2005
Posts: 4,406 Michigan
MarkZ
Worthy
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Worthy
Joined: Jan 2005
Posts: 4,406
Michigan
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Will the #7 and #8 plugs clear on the Schumacher headers? From the photos it looks like it would be close. Website makes no mention of Edelbrock heads.
1987 Fifth Avenue - 512/518/D60
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Re: Headers you can live with?
[Re: MarkZ]
#2628565
03/04/19 04:05 AM
03/04/19 04:05 AM
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Joined: Jan 2003
Posts: 28,067 Irving, TX
feets
OP
Senior Management
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OP
Senior Management
Joined: Jan 2003
Posts: 28,067
Irving, TX
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Will the #7 and #8 plugs clear on the Schumacher headers? From the photos it looks like it would be close. Website makes no mention of Edelbrock heads. I did some searches and it looks like they'll fit. There can't be much room.
We are brothers and sisters doing time on the planet for better or worse. I'll take the better, if you don't mind. - Stu Harmon
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Re: Headers you can live with?
[Re: feets]
#2628701
03/04/19 03:04 PM
03/04/19 03:04 PM
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Joined: Jan 2003
Posts: 17,844 S.E. Michigan
ZIPPY
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 17,844
S.E. Michigan
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I liked the hedman shorties on my 400ci '72 c body for the first couple years, but they are thinner material (If I remember correctly 18 gauge), I drove the car year round here in MI at the time, and they rusted out sooner than I hoped.
I now have a 440 in the car with regular straight plug heads, and HP manifolds.
Of those choices, I like the tti full length.
Rich H.
Esse Quam Videri
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Re: Headers you can live with?
[Re: feets]
#2628708
03/04/19 03:16 PM
03/04/19 03:16 PM
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Joined: Jul 2003
Posts: 4,769 Holland MI Ottawa
2boltmain
master
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master
Joined: Jul 2003
Posts: 4,769
Holland MI Ottawa
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I have a brother with a 440 Duster.An honest 425hp car- Iron 906 heads. He went with the Schumachers. In his 74 Duster they simply installed. No lifting removing dinging clearancing etc. Heavy thick steel tubing and flanges. Very install and plug change friendly. But not optimal for highest power production.
Keep old mopars alive.
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Re: Headers you can live with?
[Re: feets]
#2628732
03/04/19 04:12 PM
03/04/19 04:12 PM
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Joined: Nov 2003
Posts: 10,228 Colleyville
3hundred
I Live Here
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I Live Here
Joined: Nov 2003
Posts: 10,228
Colleyville
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Oops!
Robert
Last edited by 3hundred; 03/04/19 08:12 PM.
'68 Fury Convertible '69 300 Convertible '15 Durango 5.7 Hemi '16 300 S Hemi
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Re: Headers you can live with?
[Re: 3hundred]
#2628807
03/04/19 06:36 PM
03/04/19 06:36 PM
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Joined: Jan 2003
Posts: 16,376
dogdays
I Live Here
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I Live Here
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Posts: 16,376
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Back in the day, the 4-2-1 was known as the torquier of the two designs of long tube headers. The 4 into 1 was known for making more peak hp. The 4-2-1 sometimes fit a little better because they have fewer tubes and take up less space in the congested area.
For these reason I'm suggesting the Schumacher.
Dyno testing shows that headers increase the torque curve below the torque peak. Shorty headers don't do much more than HP manifolds, if any.
R.
Last edited by dogdays; 03/04/19 06:39 PM.
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