I was wondering if anyone could help me out with a few things.

I am going to school for drafting and design and I currently have to do a redesign project of an existing part. I chose the drivers side exhaust manifold to the Ford Y block. I am going to redesign it so that you could have dual exhaust and eliminate the crossover all together.

I have a few design ideas one being to bend the crossover end down in order to attach an exhaust pipe easier and better. And then just loop it around and under.


Or I could redesign it to look similar to the passenger side manifold. Having it exhaust out the back and down the firewall.

But the current problem that I am having is the second idea. I don't know if it would even work because of the firewall and or even the steering box. I would be certainly able to figure this out on my own if I acctually had my truck. I have my motor but my truck frame and all body parts are 10 miles away. As all know here in MN it figin cold right now. Not a good time of the year to be moving a motor or pieces to a truck.

What I am asking is could anybody tell me if the second idea that I have, could it maybe work? I would honestly like to go with the second idea but I think the steering box is going to be a big problem. And how about if I were lets say bend the manifold down in the back the same as the passengers side would that alone work if the steering box wasn't a problem.

I know this sounds like a very impractical thing that I am doing here which it is but it is a school project so that doesn't really matter. I really appreciate any input anyone may have, Thanks.

 

Making the drivers side clear the steering column, shifter linkage (3spd and auto) and the starter motor looks to be near impossible… near. I am sure someone out there has made it fly. Far as bending the pipe around in a U, that is a common method of splitting the exhaust and eliminating the crossover. My slick is that way. I am not thrilled with how close it comes to the fuel pump. I would say design a ramhorn, but that’s been done, and the way I will go eventually.

Jim

 

The DS manifold with the front bending down and under has been done many times. Not having a later model truck in front of me, it seems like the main issue with a rear exiting DS manifold is the steering shaft. Rams Horn manifolds are center dump, kind of block hugging in design and they clear the steering box.

 

I have seen a ram horn style manifold on a Y block once here's a picture.


This looks like a passenger side manifold.


Here is a good example of my first design intent. Only I would bend the front end down more so the exhaust pipe doesn't actually come up then bend around and down.


I don't know what type of manifold this is it looks like the passengerside kind of but the back side doesn't look to have the crossover end on it.



Thanks for the replys.

 

You can make a rear dump manifold work on a pickup , you must cut the flange off and miter cut the manifold to clear the steering then weld the pipe flange back on. . It's a tight fit but can be done. I've done several over the years and had no problems with it.

Have A Great Day ------- Hotwrench

 

I bought a single center-dump exhaust manifold from Mummert just to fit it to the driver-side of the engine. Since there's no motor mount to block its routing, the exhaust pipe can be routed away from the firewall, the oil pan and filter, etc. Seems like the best design option.

 

That's a Passenger car passenger side manifold used on the drivers side of a truck...

 

I certainly favor your #2 option! I had mine in the bent down and around from the front position for years and just hated the way it looked! I hope you find a solution to the limited space! Keep us posted!

 

Well I am back with a little update on the redesign of the manifold:

I just come up with this idea here last week and this is what I have modeled up. It is kind of based off the ram horn design. But yet it still kind of has the original look. Let me know what you think, or if it would possibly even work. The only thing I would change would be the how the two middle cylinders feed into the exit of the manifold. Just so it isn't so sharp or a direct 180 degree turn. Here are a few pictures.

 

I like it! But if I went with this for the drivers side, I would also want one for the passenger side to maintain the uniformity. Maybe round it off more to give it a little more of an OE look also. Thanks for working on this!

 

How will we get a wrench on the center bolt?

 

Good point Charlie!!!

Looks like the front runner is a little restrictive also, haha

 

If I were to actually go through with producing these I would definitely make one for the passenger side. It would be easy enough to do. I would have them made as a cast iron part I could just core the whole end and make two different core that will change the direction of the exhaust pipe. Or instead of it bending to the right it would bend to the left.

Round it off more like the original ram horn style manifold? Or what exactly do you mean.

Good point to be quite honest with you I didn't really think of that but I did find a few pictures of an original ram horn style manifold. Well there is the same problem on that one as well. I think if you are able to bolt the original ones on you could most definitely bolt my design on.







I actually thought that would probably be a little to small while I was modeling it up. But I just wanted to more or less get my idea out and actually have a little better representation of it. Then I could go from there.


There are a few things that I would definitely change as of right now. One being fixing the restriction problem. And two being I would like to change how the two center ports feed into the main exhaust (front runner).

Thanks for the responses!

 

From the pictures you found, I agree it does look like there is no room for a wrench but in actual use, there is just enough clearance in the valley for a wrench on original rams horn manifolds. The pictures are taken from the wrong angle to see.

Another thing to note is that the bolt holes are not in line. I can't remember the exact pattern but they are staggered by about 1/16". If you put a straight edge tangent to the top or bottom of the holes, you will see. If you have not accounted for this, it will affect your design to a small degree.

 

I was joking with you, notice in drawing #2 you didn't draw the inside on the front runner, it is solid. Keep up the good work, looks interesting.