Gripenfelter Posted March 12, 2007 Share Posted March 12, 2007 (edited) Will headers off a 3.5L Maxima fit our Pathfinders? Any intereferences from accessories? Edited March 12, 2007 by Gripenfelter Link to comment Share on other sites More sharing options...
Simon Posted March 12, 2007 Share Posted March 12, 2007 They will probably bolt up to the block, however, the output pipes will be off, as the 3.5 is mounted horizontally in the Max. The headers, instead of being on the left and right sides on the Pathfinder, are on the front and rear in the Max. Link to comment Share on other sites More sharing options...
Gripenfelter Posted March 12, 2007 Author Share Posted March 12, 2007 (edited) They will probably bolt up to the block, however, the output pipes will be off, as the 3.5 is mounted horizontally in the Max. The headers, instead of being on the left and right sides on the Pathfinder, are on the front and rear in the Max. Shouldn't be an issue then. I can get the local shop to weld up an h-pipe. http://www.ssautochrome.com/level.itml/icOid/1433 or http://www.racepages.com/parts/headers/nissan/350z.html (350Z) or http://www.2kracing.com/product_info.php/c...e56e73c80ed113c Edited March 12, 2007 by Gripenfelter Link to comment Share on other sites More sharing options...
Simon Posted March 12, 2007 Share Posted March 12, 2007 Yes, however, the rear header on the Max (not sure which side that would be on a Pathy) would face rearward.....so the header itself would have to be modified. THat, of course, is assuming I'm right that the headers would bolt up. I assume they would as the engine is the same, but I could be wrong. Link to comment Share on other sites More sharing options...
Gripenfelter Posted March 12, 2007 Author Share Posted March 12, 2007 (edited) What about headers from a 350Z? http://www.racepages.com/parts/headers/nissan/350z.html They mount the motor lengthwise like the Pathfinders. Maxima headers: 350Z headers: Edited March 12, 2007 by Gripenfelter Link to comment Share on other sites More sharing options...
nissandoms47 Posted March 12, 2007 Share Posted March 12, 2007 the 350z ones might work, but they're tuned different, they're for high end power and you want low end in the pathfinder.. Link to comment Share on other sites More sharing options...
Gripenfelter Posted March 12, 2007 Author Share Posted March 12, 2007 Stock manifolds: Link to comment Share on other sites More sharing options...
Gripenfelter Posted March 12, 2007 Author Share Posted March 12, 2007 the 350z ones might work, but they're tuned different, they're for high end power and you want low end in the pathfinder.. Well in my Camaro (yes I know bad comparison) I noticed a lot more bottom end torque with the long tube headers in comparison to the shorties. But good point about the horsepower tuning and you're right. But I wouldn't mind if the torque band moved up a few hundred rpm if it meant more overall horsepower and better fuel economy. Link to comment Share on other sites More sharing options...
Pavelow Leaks Posted March 12, 2007 Share Posted March 12, 2007 you will always gain low end torque at the expense of high end HP with long tubes...which is why most drag racers use them. Link to comment Share on other sites More sharing options...
Gripenfelter Posted March 12, 2007 Author Share Posted March 12, 2007 So I'm guessing no one here has tried headers on their Pathfinder. Looks like I'll be the guinea pig. Link to comment Share on other sites More sharing options...
Simon Posted March 12, 2007 Share Posted March 12, 2007 You'd be one of, if not THE first with a 3.5 powered R50 with headers... There are a few WD21 owners that have them. Link to comment Share on other sites More sharing options...
Gripenfelter Posted March 12, 2007 Author Share Posted March 12, 2007 (edited) I just got off the phone with my exhaust shop. They said it shouldn't be a problem fabbing up a Y-pipe as long as the 350 Z headers don't interfere with anything under the hood. They are one of the best shops in town and did true duals on my Camaro when everyone else said 3" duals would be impossible. http://web.camaross.com/forums/showthread.php?t=452678 I'll investigate it further over the next couple of days and report back. Anyone have pics of our stock manifolds on the motor in the truck? Edited March 12, 2007 by Gripenfelter Link to comment Share on other sites More sharing options...
nissandoms47 Posted March 12, 2007 Share Posted March 12, 2007 yeah try it out and tell us how it goes. id be interested to see the results. what are you going to do about the cats? just put some ones further down the pipe? just make sure your rear 02 sensors are after the cats. Link to comment Share on other sites More sharing options...
Gripenfelter Posted March 12, 2007 Author Share Posted March 12, 2007 yeah try it out and tell us how it goes. id be interested to see the results. what are you going to do about the cats? just put some ones further down the pipe? just make sure your rear 02 sensors are after the cats. Well the exhaust shop wants me to do a complete header back catback system so yeah we'll reinstall the cats further down. I'll talk to them about pipe sizing etc. The front O2 sensors are for fuel tables and the rear O2s are just simply to make sure the cats function. Link to comment Share on other sites More sharing options...
Pavelow Leaks Posted March 12, 2007 Share Posted March 12, 2007 I fairly certain they dont make them for pathys, but have you guys heard of MIL eliminators? I have them on my mustang, they basically send a false signal to the computer when you remove the forward cats, tricking it into thinking it still has them and not sending a error code producing a check engine light. I'm not sure if it would work, but couldn't you get a set and splice the right clips in to hook to a R50 O2 sensor harness?? Just an idea, thought I'd throw it out there. Link to comment Share on other sites More sharing options...
nissandoms47 Posted March 12, 2007 Share Posted March 12, 2007 i think that these headers really wouldnt be hard to do. the stock cats are massive. if you relocate the cats down under the vehicle you would have pleanty of room to work with in the engine bay. Link to comment Share on other sites More sharing options...
Gripenfelter Posted March 12, 2007 Author Share Posted March 12, 2007 I fairly certain they dont make them for pathys, but have you guys heard of MIL eliminators? I have them on my mustang, they basically send a false signal to the computer when you remove the forward cats, tricking it into thinking it still has them and not sending a error code producing a check engine light. I'm not sure if it would work, but couldn't you get a set and splice the right clips in to hook to a R50 O2 sensor harness?? Just an idea, thought I'd throw it out there. Yup. The GM guys cal them O2 sims for O2 simulators. My wife drives this truck so I don't want it to be loud. Might look into some high flow cats. I'm sure they wouldn't make O2 sims for Pathfinders but I wonder if ones from other OBD II cars would work? Link to comment Share on other sites More sharing options...
Pavelow Leaks Posted March 12, 2007 Share Posted March 12, 2007 That's what I was asking, could you just buy them and splice the correct clips in? Link to comment Share on other sites More sharing options...
NismoSkyZ Posted March 12, 2007 Share Posted March 12, 2007 I remember from a while back that they made universal 02 sims. What exactly do you mean by headers back catback. A headers back is an exhaust system from the headers back. A catback is is a system from the cat converters back. I agree with nissandoms, you should either get some high flows (though they are illegal in a lot of states), or stay with the stockers and mound them further down. This would mean you have to get longer wires for the 02 sensors, but thats no big deal. I think once you get over the headers hurdle, you should be fine as long as the sensors are mounted after he cats. Unless you have a nice mechanic you know, you need cats. Link to comment Share on other sites More sharing options...
nissandoms47 Posted March 12, 2007 Share Posted March 12, 2007 oh lol, i meant get new cats, not relocate the stockers. i meant to say put the new cats down under the vehicle, so you have room to work with in the engine bay for the down pipe. Link to comment Share on other sites More sharing options...
Gripenfelter Posted March 12, 2007 Author Share Posted March 12, 2007 I hate extending O2 wires. I did it on the Camaro and the PCM saw less voltage because of the added resistance in the wires so the car ran richer than it should. I had extended them by 2 feet. I'll look into the high flow cats. Link to comment Share on other sites More sharing options...
Gripenfelter Posted March 12, 2007 Author Share Posted March 12, 2007 (edited) Update: Located O2 simms for VQ35DE motors. $5 a piece...SWEET! Next question: Do I want 1.5" primaries or 1.625" primaries? Also, how much louder would the truck be with 2 less cats? Edited March 12, 2007 by Gripenfelter Link to comment Share on other sites More sharing options...
FUELER Posted March 12, 2007 Share Posted March 12, 2007 oh my, i noticed somebody put a link to SSautochrome, let me tell you from personal experience, NEVER buy ANYTHING SSautochrome!!! They are the crappiest parts i've ever used, and the sad thing is they are all over ebay. I had an ssautochrome turbo manifold on my honda civic, and it cracked completely through after about one month. Dropped my brand new $400 wastegate on the ground at 50 mph, not brand new anymore, had it re-welded and braced professionally, and it did not hold up. Re-welding their parts every month won't help - the metal they use in their parts is way too soft to support any kind of weight or pressure. Here are some random links I found about SS auto chrome: http://www.rx7club.com/printthread.php?t=381473&pp=40 http://search.reviews.ebay.com/SSAutochrome http://www.hondacivicforum.com/m_81729/tm.htm DO NOT BUY ANYTHING FROM SSAUTOCHROME - YOU WILL GET BURNED Link to comment Share on other sites More sharing options...
Pavelow Leaks Posted March 12, 2007 Share Posted March 12, 2007 that's why you never look for budget performance parts. Link to comment Share on other sites More sharing options...
FUELER Posted March 12, 2007 Share Posted March 12, 2007 Exactly. A great rule of thumb when it comes to parts is: -Cheap -Reliable -Fast Pick two. Someone on the RX7 board said that SSautochrome only falls under the "cheap" category, a very accurate depiction. Link to comment Share on other sites More sharing options...
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