Turbo Header Design

brandoncw

Well-known member
After doing a bit of homework on turbo header designs, I have learned two basic things, short tube headers offer a quicker turbo spool up, and long tube headers offer higher WOT Hp.

So, the question is... (**using a twin scroll turbo**)

Should i center the collector between cyl 3 & 4 to have all equal tube length, or should i set it to the rear where one side of the collector has short tube, and the other long tube?

Also, whats the best diameter for the runners? 1.5"??
 
Keep cylinders 1,2,3 separate from 4,5,6, just like the stock EFI exhaust manifolds.
Feed one set of cylinders to one side of the twin scroll turbine housing and the other set to the other side of the turbine housing.

Since you are going for mid range power, a 1.5" runner will be fine.
 
pmuller9":o7ya1mjt said:
Keep cylinders 1,2,3 separate from 4,5,6, just like the stock EFI exhaust manifolds.
Feed one set of cylinders to one side of the twin scroll turbine housing and the other set to the other side of the turbine housing.

Since you are going for mid range power, a 1.5" runner will be fine.

Yes, i had already decided on that, supposed to help flow and reduce exhaust flow reversion. What i was thnking was, say cylinder 1, 2, and 3 had longer runners than that of cylinder 4, 5, and 6. In my mind ( and i am by no means an engineer lol) it would create both slightly higher spooling, and slightly higher WOT Hp. Or should I find a good length for all 6 cylinders?

According to a thread i read about some kind of new/newer car, they come factory with long tube turbo headers and it allows them to run a 14.1 compression ratio on PUMP gas. That just kinda blew my mind.
 
It is tough trying to work around the motor mount. You could make a different style mount to give you more room.
You would like to have equal length tubes and if the turbo is down by the starter, tubes 4,5,6 could swing forward before turning down and back along side tubes 1,2,3.

If you go with a rear mount turbo like Sick6Turbo then you could just use a standard long tube header.
 
thatblue_67stang":1z9xuhf1 said:
I run just a log header. Made it from scratch. Only on 5psi but it spools great.
I want to give myself the challenge of building a runner style header, though im sure a log will suit my needs just fine. If it tuns out i dont have as much space as id like, ill probably end up using a log style.

The pic helps put my build into perspective though, looks like the best route is an electric fan and mount the turbo in front of the spring tower like you did. Looks very nice btw. and what motor is that, doesnt look like a 300... 250?
 
brandoncw":2xisuk9d said:
thatblue_67stang":2xisuk9d said:
I run just a log header. Made it from scratch. Only on 5psi but it spools great.
I want to give myself the challenge of building a runner style header, though im sure a log will suit my needs just fine. If it tuns out i dont have as much space as id like, ill probably end up using a log style.

The pic helps put my build into perspective though, looks like the best route is an electric fan and mount the turbo in front of the spring tower like you did. Looks very nice btw. and what motor is that, doesnt look like a 300... 250?


Just a tiny 200. But man is it fun. I daily it rn. Only on 5psi but turning it up soon. And chopping off the log head is pretty fun aswell lol.
 

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thatblue_67stang":rnpxf6o3 said:
Just a tiny 200. But man is it fun. I daily it rn. Only on 5psi but turning it up soon. And chopping off the log head is pretty fun aswell lol.

Hm, in mot sure how much wider a 300 is than a 200, i might have space issues. i plan on putting this 300 in a 67 pony as well
 
I've been hoping someone might come up with something for our little engines.

You could look at the designs they have for diesels like the AFE I put on my Cummins.

https://www.xtremediesel.com/afe-46-400 ... t-manifold
4640011md2.jpg
 
JackFish":cprvqjmm said:
I've been hoping someone might come up with something for our little engines.

You could look at the designs they have for diesels like the AFE I put on my Cummins.

https://www.xtremediesel.com/afe-46-400 ... t-manifold
4640011md2.jpg
I've never even thought of a log/runner hybrid thing like that, that may be a good idea. I want somewhat long tube headers, but if space does not permit, ill definitely use this design. Plus this design would be very cost efficient, look like a few 90* mandrel bends and a section of straight exhaust pipe is all you would need. Thanks for sharing
 
brandoncw":185041q2 said:
thatblue_67stang":185041q2 said:
Just a tiny 200. But man is it fun. I daily it rn. Only on 5psi but turning it up soon. And chopping off the log head is pretty fun aswell lol.

Hm, in mot sure how much wider a 300 is than a 200, i might have space issues. i plan on putting this 300 in a 67 pony as well


Any reason you are going with a 300. They weigh as much as a 289. I stuck with the 200 because its lighter.
 
thatblue_67stang":a8hthkq2 said:
I run just a log header. Made it from scratch. Only on 5psi but it spools great.


tbs_002.jpg

thatblue_67stang":a8hthkq2 said:
brandoncw":a8hthkq2 said:
thatblue_67stang":a8hthkq2 said:
I run just a log header. Made it from scratch. Only on 5psi but it spools great.
I want to give myself the challenge of building a runner style header, though im sure a log will suit my needs just fine. If it tuns out i dont have as much space as id like, ill probably end up using a log style.
tbs_003.jpg

The pic helps put my build into perspective though, looks like the best route is an electric fan and mount the turbo in front of the spring tower like you did. Looks very nice btw. and what motor is that, doesnt look like a 300... 250?


Just a tiny 200. But man is it fun. I daily it rn. Only on 5psi but turning it up soon. And chopping off the log head is pretty fun aswell lol.

Great advice here from everyone. :beer:

Normally, what Ford does stock is just fine to work around. 99% of the time, working around hard points is the easiest idea. Linc's200's backtracked to the Ford T code 1973 to 1979 header from the orthodox 1980-1983 B and X code item.

Linc's 200":a8hthkq2 said:
Let's see how these come out - - - - -

J -pipe
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Image

housing mounted

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Test run for leaks
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People back track becasue they can't see the way ford.

Every year, Ford optimised the cost equation, grouping things like low mount starter blocks with stuff that was high mount in the past, and that causes Ford to change things. A seamingly imperceptable change Ford makes is always done to reduce cost, or reduce warranty claims. So look around for the changes, and you can always use a stock part. Fords part network is normally "Upwards Compatiable". So you can put later stuff on an earlier Ford.

Just like Johhny Cashes One Piece at a time, by 1973, the holes for the 53 Caddilac engine mounts weren't present anymore, but the parts can fit....


Johhny Cash":a8hthkq2 said:
The transmission was a '53
And the motor turned out to be a '73
And when we tried to put in the bolts all the holes were gone
So we drilled it out so that it would fit
And with a little bit of help with an Adaptor kit
We had that engine running just like a song....

Back tracking on header design, carb size, or moveing backwards in features Ford make stock is always a risk. Ford does sh!+ for a purpose.


The 4.9 EFI header comes in a few differernt configurations because the engine was in E-line Vans as well. You can Y-tube parts to fit, taking runners and joining them. you can do something with sqaure tube. Or you can just owrk around the pinch points. If you get hung up on something, you never mover Forward. Move forward. Pick an option that suits. ScreVV the convention if it doesn't suit, but Do It.


The later primary light off header for a 200 has provsions for two EGT and and as many O2 sensors as you like.


derangedford90_1980_Ford_Fairmont_station_wagon_001.jpg
 
Or you could avoid all major changes, and think laterally.

EBAY260ZTWINTURBOFORp90head.jpg



For instance, the stock header allows two smaller pipes to run under the sump, Billy Beer Racing Fairmont style.

You can use parts of a stock header to create a more turbo suitable one.

BILLYBeerRacingHeader.jpg



This allows you mount the turbo on the driver side like I did in my 200 and 250 conversions. Front drive cars run the exhaust under the sump all the time with a flexiable wire weave vibration damper. The Sout American Argentina SP 221's were using twin branch exhausts for years. No one thought of twin turboing or running them under the sump, but its dead easy to make a dual cross over pipe and supply one T03 or T04 or HX35.


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The old 1980 model year 2,3 Carb Turbo had a primary light off catalyst on the passenger side, a cross under pipe CoupeBoy style, and a simple T3 60 turbo with a tight 90 degree down turn.

Optional23turbochargedengine.jpg



2300TURBOCARBMUSTANG5242281774_9b1ab8aab2_z.jpg




The cross over could have gone through the sump like the old Four Wheel drive European Ford Sierra XR4x4/Merkur Scorpio /Escort Cosworth AWD unit.


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xr4x4iSierra_016.jpg




xr4x4iSierra_017.jpg
 
Interesting, i didnt tink of that either. If all else fails, i could really make my life easy. Just use the two stock EFI manifolds and run two pipes under the sump or just behind between the trans and sump, and back up to a turbo on drivers side. Then intake goes to the front for and intercooler, the back to the intake manifold. i like the simplicity. And it will be easy to repair if anything cracks or breaks
 
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