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.... 800 worth idk....
I remember having basically the same conversation about exhaust with Ted @ engnbldr. His opinion was that the stock 22r exhaust manifold was actually very well designed and already basically a Tri-Y, especially if you can find one of the earlier designs where the downtube is two pipes for a foot or so. (or collector? not sure what you call it when there's no turbo... the pipe after the manifold.) His advice was to stick with that, then go to a 2" pipe, then a 2.25" cat and 2.25 pipe the rest of the way with a straight flow muffler like a Magnaflow. He was saying the headers mostly help at super high rpm racing applications. But they won't hurt performance either, so if the stocker is cracked and you have the money, might as well make the engine bay pretty.I have done that exhaust setup once, and I have recommended this to a handful of friends with these trucks and there is a seat of the pants improvement. Of course they are generally getting rid of an ancient cat and the stock muffler, so it's hard to say where the gain came from. One benefit of the stock manifold is quiet under the hood. The DT makes a ting-ting-ting sound that is sort of annoying.Gnarly - the 11225 Magnaflow is the one you want. Longer body, center in and offset out. Not very ricey once it settles in a bit, although I have to have a cat so that makes my setup a little quieter. You should be able to find the 11225 for $80 or so. Good luck!
The rule for mufflers is the biggest that will fit.If you get a muffler for a large luxury vehicle, it will be quiet and have plenty of flow.
...Gnarly - the 11225 Magnaflow is the one you want. Longer body, center in and offset out. Not very ricey once it settles in a bit, although I have to have a cat so that makes my setup a little quieter. You should be able to find the 11225 for $80 or so. Good luck!
I like dynomax super turbo mufflers.If you want to go the large, quiet route look at these: (dynomax quiet-flow)https://www.summitracing.com/search/product-line/walker-quiet-flow-mufflersIt's a bit of a pain, as you have to search for the size you need.And look up 'quarter wave resonator exhaust'
The muffler that my shop mentioned, I think, is this one:https://www.magnaflow.com/products?partNumber=14355&searchTerm=14355Gnarls.
Nice, I've only played around with the 11 and 14 inch versions. My 11225 is plenty deep in tone, seems like the 14355 should be even better
UPDATE: 1-20-17PMhttps://imgur.com/hitnVEDIt’s also interesting that cylinders number 2 and 3 are the two inside cylinders.
... I'm sure I'm completely missing what you're saying...
Before you put it in, measure1. Primary tube diameter and length2. Secondary tube diameter and length3. Collector tube diameter and length.4. Merge anglesMight help for some understanding on header design....
C’mon blackdiamond… of course!! Yes, you may have completely missed what I was questioning. The bung could have been located on the “Y” tube for cylinders number 1 and 4… the two outside cylinders. It would be interesting to know why - if anything technically relevant to the O2 sensor, the cylinder exhaust/combustion, or firing order - the bung is located on 2 and 3. Gnarls.
Probably just for O2 sensor accessibility when the header is in the truck.........
In theory all four cylinders should function identically. The tubes are set up such that the two cylinders being collected are not in order allowing time for the exhaust to pass before the next round. I would assume that they chose the bung location because it was on the outside pipe and by having it in a tube with only two cylinders allows it to measure the exhaust during a fire and also in the "pause" giving reading over the entire spectrum.
With the O2 sensor that far down the tubes, I'd consider retrofitting a heated sensor (3 wire is fine) if you haven't already for low speed/idle driveability.I put a 3wire in my stock manifold and it helped (for replacement of a no-name brand sensor)
Interesting...I see a potential failure with only sensing and reporting 2 cylinder exhaust gases. If cylinder 1 or 4 has a combustion issue… ignition, fuel mixture, compression, valve leak, head gasket leak, will the ECU “see” it? Gnarls.
If you want to do it right. You will need to have an o2 sensor bung installed after the collector. This way your Ecu will have an accurate sample from all 4 cylinders. I have run that header both ways. Provided location and downstream. Down stream required the addition of a heated 02 sensor but once completed ot works much better and more accurate.
Hey bgen,Yeah, that makes sense. I assume that this header design has been installed in 1000s of engine since the 22RE was introduced in Toy trucks. If there was some kind of issue regarding O2 sensor mis-readings due to only reporting 2 cylinders, I think it would be known.So... for now I'm going with what it is and monitor any codes or other strange things.Gnarls.
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