However, I need a new battery. I left the lights on and killed the battery in the Jeep the other day so I stole the jimmy’s. Probably go with an odyssey 78 this time
CK5
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“Dylan’s” 89. Back at it!
- Thread starter chris85
- Start date
89 Jimmy 6.0/4l80e/MAGNUM 205/d60/14bolt
However, I need a new battery. I left the lights on and killed the battery in the Jeep the other day so I stole the jimmy’s. Probably go with an odyssey 78 this time
Sounds like another wheeling trip in a month or 2... 
That could be a possibility.
So we’re getting down to the nitty gritty.
Trying to figure out how I should run the exhaust. I see that most tend to run a 2-1 with a y pipe but with the long tubes, crossmember and transfer case it looks like it would be easier to just run duals with a H pipe behind the TC. My biggest concern with that is possibly creating a vapor lock issue. How much clearance should I try to have between the fuel lines and brake line? All my fuel and brake lines have heat shield sleeves, and I plan to put some more heatshield on the exhaust itself.
I’ll try to get a picture later of how much space I have to work with. I really don’t have a preference between duals or single exhaust. I just want to minimize any heat issues.
Trying to figure out how I should run the exhaust. I see that most tend to run a 2-1 with a y pipe but with the long tubes, crossmember and transfer case it looks like it would be easier to just run duals with a H pipe behind the TC. My biggest concern with that is possibly creating a vapor lock issue. How much clearance should I try to have between the fuel lines and brake line? All my fuel and brake lines have heat shield sleeves, and I plan to put some more heatshield on the exhaust itself.
I’ll try to get a picture later of how much space I have to work with. I really don’t have a preference between duals or single exhaust. I just want to minimize any heat issues.
So this is the area where things get tight and close to lines. This is a piece of 3” that I’m holding and there’s at least 1.5” of clearance on all sides. But like I said in the previous post, I’m more concerned about the heat.
I see hot floors in your future.
In my opinion with long tubes, go and do the merge pipe around the output of the t-case and run the pipe down the driver's side. its much easier to package rear suspension stuff, like traction bar with out having dual pipes taking up the room. Plus if you still have the factory heatshield you can use it for the muffler.
Personally, I’d ditch the long tubes. Then you’d have plenty of room for a crossover and 2-1. Then no exhaust heat at all on all your precious fuel system.
Yeah I’ve thought about this, but it doesn’t really help the potential problem. The exhaust still would have to pass pretty close to the lines by the TC.
But but but
they’re so pretty. Honestly I should’ve thought about the exhaust more from the start. I was too concerned with squeezing all the power I could out of the motor. And too much money wrapped up in them now so I gotta give them a shot.
I’ve done a little more looking around and haven’t seen anyone having the problems that I’m concerned about. So I could just be paranoid.
I'm running long tubes on mine, 2.5" merged into a single 3". I probably have less room then that between my fuel lines and exhaust and haven't had any issues in the last 12k miles. My np241 is clocked up so it was real tight getting the exhaust by on the passenger side.
Good to hear. Do you have any kind of heat shielding on the exhaust or lines?
If I was doing mine again, this is what I would do. Mid length headers, y-pipe under the torque converter. The pass side is too tight with a 2.5" tube running between the floor and a np205, I'm fighting with heat issues. Also allows for clocking the case in the future without exhaust mods
Yeah I probably would’ve done this if I was starting from scratch. Sounds like I’ll be ok though. Time will tell.
What particular issues are you having?
Floor temperatures over 130 degrees. I dont have any carpet at all, just bare steel. I dont have a return style fuel pump yet, so I have vapor locked once or twice. Since then I have installed DEI header wrap on my exhaust, and reflective heat sleeve on the fuel lines. Its better, but still have very warm floors (105-110 degrees). The vapor lock problem is bandaided, still need to do the return style pump as a better solution.
Nope, no heat sheilding. With bedliner interior the floors do get pretty hot on both sides from the headers though, even with the 1" body lift and new cab bushings.
I have long tubes and dual 3" , one running through that same spot, I slid heat shield material (the reflective stuff) on the fuel and brake lines and bent a little sheetmetal heat shield to cover the fuel filter. Nothing fancy just an almost flat shield between the fuel filter and exhaust that screwed to the frame, that was 10 years ago already. Don't put it too close to the floor.
Long tubes are worth the power and torque increase unless you have a stock TBI or something like that. Even on a 400 hp small block long tubes can be worth 30-40 hp over shorties and a restrictive Y pipe.
Long tubes are worth the power and torque increase unless you have a stock TBI or something like that. Even on a 400 hp small block long tubes can be worth 30-40 hp over shorties and a restrictive Y pipe.
This is how you find out when the magnum is in low
What am I looking at? I’m on my phone so it might be obvious on a bigger screen.
I think it was an idle bunrout.
