Bolt-in high performance FJ62 exhaust

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Spook50

Spook50

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I'm trying to drum up interest for EMS to design a full manifold-back exhaust for FJ62s. Basically it'll be just like their FZJ80 exhaust, only for FJ62s.

Here's a thread with details of the FZJ80 exhaust. It's not cheap, but I'd pay it for a complete bolt-on system for my 62. https://forum.ih8mud.com/ih8mud-com-vendor-marketplace/323450-fzj80-exhaust-upgrade.html

If they get at least ten people interested, they'll develop a system for 62s.

Edit: Here's a pic of their finalized system before being shipped out
fzj80v092b.JPG
 
Bryan062087 said:
Looks nice. What diameter is the pipe?
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2.5", which I imagine will be the same if they do a system for our rigs. I'm hoping 1.75" or 2" pipes directly from the manifold into a Y (just seperate long enough to fit the O2 sensors), then a 2.5" single for the entire exhaust that can be tucked up nicely and protected by the frame.
 
Spook50 said:
2.5", which I imagine will be the same if they do a system for our rigs. I'm hoping 1.75" or 2" pipes directly from the manifold into a Y (just seperate long enough to fit the O2 sensors), then a 2.5" single for the entire exhaust that can be tucked up nicely and protected by the frame.
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No need to do a y pipe, just run dual 2" pipes inside the frame rail to a dual 2" entry/single 2.5 exit cat. This all fits nicely inside the frame rail with the cat directly above the tranny cross member for protection. A cat like this is only $100-125 if you bought off the shelf from Summit.

You can also get a cat with extra O2 sensor bungs built in. If they don't want to go this route I would ask them to put an extra O2 sensor bung (the standard 18mm threads, not like our OEM bungs) in between the y-pipe and the cat for folks that want to can run a wideband O2. Quality widebands are so cheap now...

I also did short flex pipes close to the manifolds such as the pic shows for a little extra security against engine flex. This would be a nice touch on an off the shelf system.
 
As much as I love fabricating, this has been something that I did not want to do.

I would purchase the Y-pipe into cat setup if it became available.

For me, it is fabbing the y and the 02 sensor housing that bothers me.

Another question, is there a standard, screw in 02 sensor that we can use to replace the stock ones in the FJ62?
 
Slowerthanu said:
Another question, is there a standard, screw in 02 sensor that we can use to replace the stock ones in the FJ62?
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Yes, you need a little adapter flange. Most exhaust shops can get these. Or if you buy a generic O2 with a vehicle specific plug (like a Walker) they usually come with the adapter.
 
Spook50, we can definitely make a system for the FJ62 with enough interest.

To answer a few preliminary questions that have or may come up:

* Piping: I prefer to use only 304 stainless steel piping on our exhausts. This assures a system that will last a long long time (usually longer than the vehicle they're going on). For naturally aspirated 6 cylinder motors 2.5" mandrel bent piping is the way to go. It's the best compromise between power, fuel effeciency and cost.

* In exhaust systems that we make that require catalytic converters we use only high flow cats. They are a little more pricey, but they allow for maximum flow while still keeping the emissions sniffers happy.

* On all of our exhausts we use custom lasercut 304 stainless steel O2 sensor bungs that will accept the factory O2 sensor(s). If anyone wants additional O2 sensor bungs welded in for use of an aftermarket wideband O2 sensor, we can accomodate that as well.

If you've got any questions, requests, or anything at all feel free to ask and I'll do my best to answer.
 
The FJ62 has two O2 sensors with wiring that is position sensitive. So will your exhaust system locate the O2 sensors in the same physical space, and will you eliminate the funky frame crossover that Toyota did with our exhaust? If so, I'm on board. I'm just about due for a new muffler anyway.

Oh, and how much $$$ for the entire setup?
 
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slcfj62 said:
The FJ62 has two O2 sensors with wiring that is position sensitive. So will your exhaust system locate the O2 sensors in the same physical space, and will you eliminate the funky frame crossover that Toyota did with our exhaust? If so, I'm on board. I'm just about due for a new muffler anyway.
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Ditto on all of this. I am ready to bend up some sliders but I need to eliminate the asinine design that the factory rolled out.
 
Slowerthanu said:
Ditto on all of this. I am ready to bend up some sliders but I need to eliminate the asinine design that the factory rolled out.
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Sure, we can do that.
 
slcfj62 said:
The FJ62 has two O2 sensors with wiring that is position sensitive. So will your exhaust system locate the O2 sensors in the same physical space, and will you eliminate the funky frame crossover that Toyota did with our exhaust? If so, I'm on board. I'm just about due for a new muffler anyway.

Oh, and how much $$$ for the entire setup?
Click to expand...

I'm under the impression that being closer to the manifold will not affect the performance of the OEM O2 sensors. As long as they're still monitoring the same bank of cylinders that they do in the factory configuration, you're fine.

Final pricing I would imagine would be similar to the FZJ80 exhaust's price ($950 right now, keeping in mind it's all stainless). It just depends on how complex the final configuration ends up being I guess. I'll leave that figuring to EMS :hillbilly:

Great to see this starting to make some headway. I'm going to start putting money aside now in hopes this can be seen through to completion.

If it doesn't, I'll use that money for a 4x4Labs rear bumper :D
 
I too like the idea of these and do like the stainless part. But, I would want to make sure theat the O2 sensors do work in the same location relative to the stock existing wiring. I get that the sensor will work closer to the manifold. Still I hate cludges and crappy routing for things like wire harnesses.

I am not affraid of electronics and wiring; its what I do all day. I simply do not want to mess with it. If able to retain the stock wiring to the sensor without having to re-route or otherwise having to worry about shielding it etc, I'm in. If not, I'm not.
 
snowakii said:
I too like the idea of these and do like the stainless part. But, I would want to make sure theat the O2 sensors do work in the same location relative to the stock existing wiring. I get that the sensor will work closer to the manifold. Still I hate cludges and crappy routing for things like wire harnesses.

I am not affraid of electronics and wiring; its what I do all day. I simply do not want to mess with it. If able to retain the stock wiring to the sensor without having to re-route or otherwise having to worry about shielding it etc, I'm in. If not, I'm not.
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I see what you're gettin at. It'd make things a bit simpler as far as installation if the stock O2 sensor locations were retained. It could probably be done with a 2-in 1-out cat like what Joel mentioned. That might be a better way to go for our rigs actually, IF both pipes feeding into the cat could fit inboard of the frame.
 
Would you be using the stock isolators or would you be going for a hard mount like the 80 series exhaust? And why did you go with a hard mount for the 80?
 
For the O2 sensors, we will NOT design an exhaust that requires cutting/splicing or modifying of the wires. O2 sensor wires for the most part are shielded wires which if cut/spliced may not read correctly. If we design an exhaust it always retains the factory O2 sensors & wiring.

matt60/80 said:
Would you be using the stock isolators or would you be going for a hard mount like the 80 series exhaust? And why did you go with a hard mount for the 80?
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It really depends on the truck and how we setup the exhaust. On the FZJ80 exhaust that we make, it was better to delete the rubber isolators and hardmount the exhaust. 1) the flex sections we use in the y-pipe absorb all of the engine vibration that resonates through the exhaust so rubber isolators were not needed to absorb the vibration and 2) hardmounting the exhaust kept it in place better without allowing too much "flop". With that said, if we see that the FJ62 would benefit from rubber mounts, we can definitely setup the mounting system to include rubber isolators.
 
mmw68 said:
If you need to look at a fj62, seriously, just shoot me a Email.
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I'll definitely keep that in mind. BTW, there's an FJ62 that's always parked at the shopping center at the corner of Onion Creek & IH35 that is white, with what looks like 33" tires, a snorkel, front tube bumper, front fender protection and sliders. Any idea whose truck that is? It's a great looking rig.
 
baktasht said:
For the O2 sensors, we will NOT design an exhaust that requires cutting/splicing or modifying of the wires. O2 sensor wires for the most part are shielded wires which if cut/spliced may not read correctly. If we design an exhaust it always retains the factory O2 sensors & wiring.
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Given that you'd retain the factory locations for the O2 sensors (good plan too, given the reasons you cited), do you think it'd be beneficial to use a 2-to-1 cat, or Ypipe the exhaust before getting to the cat?
 
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