what kind of peppier are you talking about?

it seems headers should give a decent amount of power with the right exhaust system. my 6.9 has 420 ci I think. giving that engine an easier way to get that exhaust out seems like it could add 30+ hp.

if only I had the money...

 

Any idea what the 1/8 or 1/4 mile ETs are?

 

will these stans headers fit a 4x4 or will they hit the driveshaft and stuff?

Ray

 

Mine is a 4x4, End of drivers side header ends just in front of transmission pan, so crossover pipe on mine runs under the tranny pan. I have pictures in my gallery.

 

i was wondering the same thing with the 4wheel drive. i just got my pump turned up so im planing on doing the headers to see how they do with the stacks. so there ant to much to putten them on or did u run into any other probs. one thing i was wondering is do our trucks us a gasket of any sort for the manifolds or headers.

 

The stock manifold has a steel, dimple type gasket, the headers have a large 1/4" base plate and a thick fiber gasket. Torqued up at install, and re-tighten a couple of times after install, no problems, been on about a year I think!@!

Headers sound -good but are expensive, If I were doing it again I think I would just get the pipes opened up to 3" right at the manifolds. Another member here just bought a set, I hope he did a dyno run before and after so a real value HP wise can be put on the headers.

They do help with acceleration, way better air / exhaust flow- actual rubber on the road horse power comes from burning more fuel. The headers allow you to turn up the fuel as they get rid of the exhaust more efficently.

 

There was a guy over @ TDS that dyno'd Stans headers before/after. He saw something like a 8 HP differance. IIRC it was under 10HP.

Get an AutoJet exhaust. Best bang for your buck.

If you read the online conversation Gale Banks had with IDI owners. He states that no Dyno gains were found goin over 3.5" on NA diesels. And none after 4" with Turbo IDI's.
He even stated that the PSD stopped seeing gains after 4.5" So anything larger is just bling.

 

I have a 1989 idi and was wonting more horses is headers a good option if so where is the best place to get them,it also sounds like open exaust is very efective for the money the bigger the better?I buoght a 86 ford that has the 460 auto the body is perfect it just came from arizona I want to put my 7.3 idi in it will that work ?and I want to swap the man trans but everybody is saying automatic trans is a little better and it isnt worth the hassle of converting a it any input.?

 

460's do not have the same bellhousing pattern that the diesels do. If you get the right tranny though, you can drop in the diesel. If you change out the front radiator support, you can run the extra large radiator for the diesel.

 

As stated above, Stan's Headers is the only game in town for IDI diesel headers.

You will need to do a few mods to the gasser to install a diesel, but it is very doable.
Do you know id the 86 is a heavy duty or light duty chassis?

If not, what rear axle and what is the side badging 250 or 350?

 

It is heavy duty chassis definitly.
thanks for the info about the headers probly not worth it, im glad to know that the trany bell housing is different that is the decider to go with the man trans I like that better any how even with a bit more work.Thanks

 

earlier in this thread it was mentioned that these would not work with a turbo....I know that there would be fab work necessary, and set aside the thermal issues (getting hot exhaust to the turbo), it seems that better exhaust flow is better exhaust flow (and ultimatly that flow will be driving the turbo). Also, if going with the headers, and going to true duals, am I better off running straight back, or putting in an H-pipe.

Forgive my ignorance...I am thinking out loud and am new to the diesel world.

 

Using headers with a turbo is more of a packaging problem than anything else. You would have to mount the turbo under the truck. If you mount it under the truck(in harms way in a vehicle that is street driven) then you have to route your air intake down under there too somehow. And you also have to oil the turbo, which would be no problem to run a pressurized line down to it, but how are you going to get the oil back to the oil pan? Another pump? Very complicated, very messy.

 

And let's not forget the extra volume of exhaust the headers would hold, which would have to be brought up to pressure before the turbo could start spooling.

Then you have to pressurize the air supply pipe from the turbo back up to the intake.

Turbo lag would take on a whole new meaning.

 

so dave do u runn headers or stock u have the supper idi what ford should have made