How can the exhaust be ran inside the frame like earlier models. Does the gas tank have to be relocated? I can run the exhaust up under the skid plate beside the trans, but then I run into the gas tank behind it. What are my options?
1980:Exhaust inside frame?? (1 Viewer)
- Thread starter fjatheart
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Good post, wondering the same thing!
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Three options:
1) go back to the stock gas tank and run the exhaust.
2) have the exhaust exit just in front of the rear tire. This depends greatly on your set-up. May not be street legal in all 50 states. If you have body lift run between the frame and the tub with appropriate heat shielding. If not and your springs are flipped, could exit between the front spring hanger and the rear tire. Must take into account suspension travel.
3) Place the muffler ahead of the rear axle. Route the tail pipe over the rear axle out board of the shock. Run the pipe next to the fuel tank. A heat shield would be appropriate. The exhaust tip can exit in one of two places: if springs are reversed straight out the back. If in a more stock config. exit between the rear tire and the rear shackle.
Needless to say, if the vehicle is primarily stock with an auxiliary tank, slung under the tub, behind the rear axle then your options are limited and careful measuring will be required.
1) go back to the stock gas tank and run the exhaust.
2) have the exhaust exit just in front of the rear tire. This depends greatly on your set-up. May not be street legal in all 50 states. If you have body lift run between the frame and the tub with appropriate heat shielding. If not and your springs are flipped, could exit between the front spring hanger and the rear tire. Must take into account suspension travel.
3) Place the muffler ahead of the rear axle. Route the tail pipe over the rear axle out board of the shock. Run the pipe next to the fuel tank. A heat shield would be appropriate. The exhaust tip can exit in one of two places: if springs are reversed straight out the back. If in a more stock config. exit between the rear tire and the rear shackle.
Needless to say, if the vehicle is primarily stock with an auxiliary tank, slung under the tub, behind the rear axle then your options are limited and careful measuring will be required.
matt.mcinnes
2F-ETI
Option 4
I can get a 3" pipe through here too. Never below the frame muffler in the rear. Requires custom extractors though see last pic.
Old system was 2.5"
Pacemakers shortened to go above the gearbox cross-member. To suit 2.5" system for sale too and ceramic coated
Easier with a pre 79 I would think as the gas tank is under the seat.
Matt
I can get a 3" pipe through here too. Never below the frame muffler in the rear. Requires custom extractors though see last pic.
Old system was 2.5"
Pacemakers shortened to go above the gearbox cross-member. To suit 2.5" system for sale too and ceramic coated
Easier with a pre 79 I would think as the gas tank is under the seat.
Matt
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The thing you've forgotten to include in your query is whether or not the vehicle needs to remain emissions compliant. VERY, very relevant to discussion, as your model year ALSO REQUIRES A CATALYTIC CONVERTER!
matt.mcinnes
2F-ETI
The thing you've forgotten to include in your query is whether or not the vehicle needs to remain emissions compliant. VERY, very relevant to discussion, as your model year ALSO REQUIRES A CATALYTIC CONVERTER!
What's a catalytic converter
What's a catalytic converter
Beats me...
matt.mcinnes
2F-ETI
What's a catalytic converter
I see now, a bit like a catoninetails then (sex aid)
What's a catalytic converter
Haha, my sentiments exactly.
matt.mcinnes
2F-ETI
Here is my 3" going in
- Thread starter
- #12
Any concern about the heat from the exhaust being too close to the gas tank?Here is my 3" going in
I've got a two part MAF header, I'm curious if it could be altered to make the bend as your header. Thoughts? Thanks for the pictures, for sure a big help.
matt.mcinnes
2F-ETI
No issues with heat clearance it's actually quite good even for the 3" but leave as much space as you can between the gas tank and the exhaust.
Just a note though the 3" is mandrel bent stainless and painstakingly fabricated together to follow the same route as 2.5" and came in at $950Aus 2.5" in steel is way way cheaper.
New system is complete now.
Never damaged this set up even at comp
Just a note though the 3" is mandrel bent stainless and painstakingly fabricated together to follow the same route as 2.5" and came in at $950Aus 2.5" in steel is way way cheaper.
New system is complete now.
Never damaged this set up even at comp
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The infamous last words...
matt.mcinnes
2F-ETI
I haven't had any issues with the exhaust run inside the frame all the way back. It was a concern at first though. I guess the heat isn't enough and the fuel tank has a little insulation.
matt.mcinnes
2F-ETI
Does it rattle in the frame?
To make sure we're on the same page here, mine is in between the frame rails. No I don't have any problems with it rattling around (maybe there are too many other rattles to notice). I've been very happy with the setup.
