tooter's manifold adventure...

[CrankyOldMan]

Originally Posted by xnamerxx

In my case I picked up 7hp and 6 tq over a DC header with the long tube header I designed.

Is that design, by chance, available for the rest of us? I'm sure there's a thread, but I'm really lazy in the morning.

[xnamerxx]

Originally Posted by CrankyOldMan

Is that design, by chance, available for the rest of us? I'm sure there's a thread, but I'm really lazy in the morning.

Nope, spent a bit too much time with it to show off.

[tooter]

Who could forget the freaking awesome sound of your dyno runs, namer?

http://www.youtube.com/watch?v=fpkgkDjwHVg

I thought of your project every time I saw these.




But like you said, they only adjust for attitude, but not for length.

Had you come up with any other ideas to resolve the issue of engine arc travel? You seemed to be so close to a functional product.

[xnamerxx]

I did, it ended up being a bit of a compromise but a flex joint placed in the right place took care of that problem. So far I have 6+ momths of testing on the car and no failures to speak of(knock on wood).

The main reason I couldn't put it into production because I was never able to find a shop that I could get to mandrel bend the tubes for a reasonable cost. The total cost with labor and mending would have been well into the $1000+ range, so it didn't seem viable as something I could sell.

With all that being said I still don't get tired of the torque it produces, it almost feels like a jeep motor now.

[tooter]

I totally understand. New one-off products are always expensive. Could your header have a bung to accept the stock 02 sensor? And does it end before the stock cat? I'm just curious how much it alters the stock exhaust configuration. Oh, and does it hit anywhere under accel or decel?

[xnamerxx]

No it doesn't hit anywhere.
I'm not sure how it affects the stock cat configuration because I have a custom midpipe, but If I'm guessing you'd need to remove one and move the other. As for the o2 sensors it accepts both in close to the stock location. I chose to do that rather than move the o2 sensors since I have no way of modifying the timing delay for the o2 signal, the downside is I only read half the cylinders.

[tooter]

Originally Posted by xnamerxx

No it doesn't hit anywhere.
I'm not sure how it affects the stock cat configuration because I have a custom midpipe, but If I'm guessing you'd need to remove one and move the other. As for the o2 sensors it accepts both in close to the stock location. I chose to do that rather than move the o2 sensors since I have no way of modifying the timing delay for the o2 signal, the downside is I only read half the cylinders.

Sounds like you worked out all the bugs and have a good product with the only obstacle being prohibitive material costs. Maybe in the future something will happen to change that.

[tooter]

Originally Posted by xnamerxx

I chose to do that rather than move the o2 sensors since I have no way of modifying the timing delay for the o2 signal, the downside is I only read half the cylinders.

I wouldn't be too concerned about that, namer.

I just noticed these Doug Thorley headers that are really popular with the Tacoma 4.0 guys only sample one third of the cylinders!