Exhaust Routing for 91 Dakota Lowrider?
#1
04-26-2017, 04:52 PM
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Exhaust Routing for 91 Dakota Lowrider?
I swapped a magnum 5.2 into a 91 dakota original LA318 and I'm wondering how people have routed the exhaust for this application. The Y pipe has had to be modified significantly to get it to bolt up to the Magnum engine.
The truck has now been lowered with 2" drop spindles and 3" block in rear and the exhaust is REALLY close to the ground.
I mean, the truck isn't even as low as I intended to finally make it and there is no way this arrangement will work.
Can anyone say how they routed the exhaust for this application? Did you go OVER the crossmember that is running under the transmission? That appears to be the only method that would really tuck it up under the truck.
Right now the configuration is a Y pipe to a single catalytic converter then to a splitting muffler that breaks it into dual exhaust behind the axle.
The truck has now been lowered with 2" drop spindles and 3" block in rear and the exhaust is REALLY close to the ground.
I mean, the truck isn't even as low as I intended to finally make it and there is no way this arrangement will work.
Can anyone say how they routed the exhaust for this application? Did you go OVER the crossmember that is running under the transmission? That appears to be the only method that would really tuck it up under the truck.
Right now the configuration is a Y pipe to a single catalytic converter then to a splitting muffler that breaks it into dual exhaust behind the axle.
#2
04-26-2017, 05:38 PM
Can anyone say how they routed the exhaust for this application? Did you go OVER the crossmember that is running under the transmission? That appears to be the only method that would really tuck it up under the truck.
Right now the configuration is a Y pipe to a single catalytic converter then to a splitting muffler that breaks it into dual exhaust behind the axle.
It's tucked in pretty tight, above the lower edge of the frame all the way as I recall. The pipe shoots slightly upward after the Y, until it passes over the transmission cross member where it has a slight bend to allow it to level out before going into the muffler.
#3
04-26-2017, 06:39 PM
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Well, I have an '89 (4X4) that I put a Magnum 5.2 in, and I have a single 3" pipe running out of a stock '92 Y pipe, into a MagnaFlow hi-flo cat, OVER the transmission cross member, and from there into a Hush Thrush muffler and out thru a 2.5" single tailpipe.
It's tucked in pretty tight, above the lower edge of the frame all the way as I recall. The pipe shoots slightly upward after the Y, until it passes over the transmission cross member where it has a slight bend to allow it to level out before going into the muffler.
It's tucked in pretty tight, above the lower edge of the frame all the way as I recall. The pipe shoots slightly upward after the Y, until it passes over the transmission cross member where it has a slight bend to allow it to level out before going into the muffler.
Where did you obtain a 92 Y pipe? Nobody seems to have that one. I modified the 91' Y pipe to work but it isn't stellar. The Y itself is really low. I'm guessing the LA318 manifolds were significantly higher than the magnum.
#4
04-26-2017, 08:00 PM
Do you know if the stock exhaust configuration was OVER the crossmember for the pre magnum dakota?
Where did you obtain a 92 Y pipe? Nobody seems to have that one. I modified the 91' Y pipe to work but it isn't stellar. The Y itself is really low. I'm guessing the LA318 manifolds were significantly higher than the magnum.
Where did you obtain a 92 Y pipe? Nobody seems to have that one. I modified the 91' Y pipe to work but it isn't stellar. The Y itself is really low. I'm guessing the LA318 manifolds were significantly higher than the magnum.
That '92 / '93 Y pipe is a rare bird now. I. bought mine about 5 years ago. I do believe that if you look hard enough, you may still find an auto parts supplier that has one sitting in their inventory. They are nice to have, larger diameter to match up to the 92/93 exhaust manifold's larger outlets.
#6
04-26-2017, 08:49 PM
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I'd suggest a "H" or "X" pipe in there anyway; that helps to equalize exhaust pulses and can help scavaging of spent exhaust out of the cylinders.
RwP
#7
04-27-2017, 06:51 AM
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#8
05-02-2017, 05:21 PM
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Def have to have an X or H because the TBI uses a single 02 sensor.
Believe me, I wish I had just bought "universal" mandrel bend kits but I'm where I am.
#9
05-02-2017, 05:28 PM
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OEM was over the cross member.
That '92 / '93 Y pipe is a rare bird now. I. bought mine about 5 years ago. I do believe that if you look hard enough, you may still find an auto parts supplier that has one sitting in their inventory. They are nice to have, larger diameter to match up to the 92/93 exhaust manifold's larger outlets.
That '92 / '93 Y pipe is a rare bird now. I. bought mine about 5 years ago. I do believe that if you look hard enough, you may still find an auto parts supplier that has one sitting in their inventory. They are nice to have, larger diameter to match up to the 92/93 exhaust manifold's larger outlets.
Anyone know what changed from 92 to 93+ on the exhaust that makes a Y pipe off that year not work? I can't imagine what could have changed that was so dramatic that you could not make it work.