|
|
Post by Head coconut on May 9, 2015 18:12:31 GMT -6
Stock y-pipe...where it joins.... Attachments:
|
|
DarkMonohue
Administrator
The reason our kids are ugly, little darlin'
The tenderest of snowflakes, apparently.
Posts: 62 
|
Post by DarkMonohue on May 10, 2015 9:22:17 GMT -6
Wow. Maybe it's time for me to get into the FSJ exhaust business after all.
Also, if you'd cut back on... oh, nevermind.
|
|
|
|
Post by Addicted on May 14, 2015 8:00:55 GMT -6
Is that really just a hole drilled in the right side pipe with the left side angle cut causing the left side to have to fight its way into the right side?
|
|
|
|
Post by Head coconut on May 14, 2015 21:16:22 GMT -6
Pretty much...
left pipe is 2.25 and decreases to 2" @ bends
right pipe is 2.5 and decreases to 2.25 @ bends
I'd venture a guess that a true 2.5" y-pipe with a good union & mandrel bends would easily add a few ponies.
A while back I contacted Magnaflow to see if they would be interested in producing one.
Got a call back, but guy I spoke to didn't feel the market was there.
So it's DIY time or pay local shop ~$300...(not happening)
|
|
|
|
Post by Addicted on May 15, 2015 7:19:54 GMT -6
I'd be curious to see what a Walker y-pipe is like inside. Looks just like factory outside with the exception of the wrinkles in the bends
|
|
DarkMonohue
Administrator
The reason our kids are ugly, little darlin'
The tenderest of snowflakes, apparently.
Posts: 62
|
Post by DarkMonohue on May 17, 2015 10:49:33 GMT -6
Pretty much... left pipe is 2.25 and decreases to 2" @ bends right pipe is 2.5 and decreases to 2.25 @ bends I'd venture a guess that a true 2.5" y-pipe with a good union & mandrel bends would easily add a few ponies. A while back I contacted Magnaflow to see if they would be interested in producing one. Got a call back, but guy I spoke to didn't feel the market was there. So it's DIY time or pay local shop ~$300...(not happening) Good to know. A good collector and mandrel bends are well within my capabilities, and I don't need the kind of volume that big manufacturers do. If I sell fifty units it's a home run. 304 stainless is also feasible. I was planning to use a free flow manifold on the driver's side. It looks like there is more than enough room to use that manifold on a truck with driver side front pumpkin. Is clearance a concern in the real world? I could offer it two ways, one for log manifold and one for free flow, but I'd rather not have a long list of options. Also, not sure whether a downpipe that fits late models would also fit earlier trucks. Didn't the oil pan change at the same time? 2.25" might be more than adequate for anything that a typical FSJ engine puts out. |
|
|
|
Post by Head coconut on May 18, 2015 10:10:12 GMT -6
Yes, the oil pan changed a little on late model(s).
Extremely doubtful a y-pipe (set up like the factory did) for a late model would clear the driveshaft on the early models?
Maybe with some creative routing of the crossover pipe it could be made to work on both?
Clearance is an issue on late model wags/grand wags with saggy springs.
Pretty sure the early y-pipe has been discontinued, so with no real options I would think those would sell?
Only a matter of time before the late model is discontinued as well?
|
|
DarkMonohue
Administrator
The reason our kids are ugly, little darlin'
The tenderest of snowflakes, apparently.
Posts: 62
|
Post by DarkMonohue on May 19, 2015 9:37:11 GMT -6
That's right, early models actually routed the RH downpipe under the driveshaft, didn't they? I wonder whether there are enough stock height early vehicles left to warrant building a part just for them.
Regarding the late model idea, it would be great to offer something better than Walker, especially if it lets you utilize the free flow manifold. I'm not too worried about accommodating sagging springs or other faulty components but I do prefer to tuck things in as neatly as possible.
Next question: better to accommodate the damper door on the RH side, or build straight off the manifold? I guess I could do both. *IF* it's not a nightmare, it could be configured with or without damper door on the right, and with early or late manifold on the left, and that should accommodate all the late model guys with iron manifolds.
And then we'll get someone in who wants it in a different tubing diameter. Right now I'm thinking 2.25" downpipes and 3.0" outlet. That's big enough for anyone still using iron manifolds. 2.50" off the manifolds would also be feasible, probably, depending on the gaskets used and how the tube or flange has to be configured to seal to them.
|
|
|
|
Post by Ristow on May 27, 2015 20:18:27 GMT -6
lose the heat riser. go 2.5. screw the stock nazi's. they have walker.
|
|
DarkMonohue
Administrator
The reason our kids are ugly, little darlin'
The tenderest of snowflakes, apparently.
Posts: 62
|
Post by DarkMonohue on May 28, 2015 9:14:20 GMT -6
lose the heat riser. go 2.5. screw the stock nazi's. they have walker. Makes sense. Well, not the Nazi part, but there's not much point competing with a widely available part from a mainstream commercial manufacturer. Better to offer something nobody else builds. I'm still not sure 2.5" is better than 2.25". I am aware that it is bigger, but that's not the same as better. Better add this to the list of things to do...someday. |
|
|
|
Post by Head coconut on May 28, 2015 14:37:20 GMT -6
Walker discontinued the early y-pipe, they don't make them any longer. It's only a matter of time before they do the same on the late model.
That said the walker pipe is a POS, crimped bends, and looks like 10yr olds welded them together.
|
|
|
|
Post by WH on Jun 8, 2015 16:51:21 GMT -6
I replaced the exhaust on my 87 Grand Wagoneer, execpt for the Y pipe. I have a new Wagner hanging in the shop just in case.
I have a header pipe for the 258 that I would love to have mandrel bent. It is 1 3/4 to 2" rest of the exhaust is 2 1/2". I used one from a baby Jeep that works but does not run exactly where the original does.
|
|
DarkMonohue
Administrator
The reason our kids are ugly, little darlin'
The tenderest of snowflakes, apparently.
Posts: 62
|
Post by DarkMonohue on Jun 9, 2015 21:49:10 GMT -6
I have a header pipe for the 258 that I would love to have mandrel bent. It is 1 3/4 to 2" rest of the exhaust is 2 1/2". Is that a factory original part that mates up to the 258 and the truck's original exhaust system? If it's not on the truck, I'd like to see pics of it. Might be something that could be fairly easily reproduced. |
|
|
|
Post by Head coconut on Jun 15, 2015 15:36:07 GMT -6
How they should have been from factory. Real PITA when y-pipe doesn't come off easily. Attachments:
|
|
