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Thread: My 260Z build (Exhaust mods and such)

  1. #1
    240Z Elec. Upgrade guy Zs-ondabrain's Avatar
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    Default My 260Z build (Exhaust mods and such)

    So in building the 260Z, I plan on a true dual exhaust system. I'm going with the 3-into-2 Ceramic coated header, A dual 2" inlet/dual 2" outlet SS welded muffler w/ internal X-over pipe, etc.
    I'll let the pictures do the talking....

    I'll use the ceramic coated header and put 2" collectors on each pipe. So they can be unbolted easily.


    This should mount up high near the driveline.


    It'll look better when it's coated and in the car.


    This is why I cleaned up the back end. I might renotch the panel depending on where the pipes will sit on each side.

    The stock exhaust cut-out is now gone.


    With the R/T mount in and the crossmember cut and modified, There's a little more room for the dual 2" pipes to keep high in the underbody. But I think I need to move or modify the fuel pump and filter assembly so the right side exhaust will slide on by. There's no way I'm attempting this myself and will employ an exhaust shop down the road to do all the bending, welding and hanging. I'll try and update this with each move on the exhaust that gets done.

    The muffler is 4" tall X 9" wide X 22 long (add another 6" for the dual 2" pipes that stick out 3" from the muffler on both sides for a 28" length.

    I'll add pics of the fuel tank when it gets installed, after I seal the Drivers side vent line and run new hoses and figure out the vent line above the inlet and outlet cause I removed the vent line that normally goes to the charcoal tank up front. I'm thinking may bun a line to the fuel door/ filler area with a filter or something. I removed the expansion tank and did the whole tank mod.

    More to come later

    Dave
    Last edited by Zs-ondabrain; 11-02-2009 at 11:23 PM.
    Rate my Z at Car Domain.com
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  2. #2
    Registered User 70 Cam Guy's Avatar
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    I like the idea, that stainless muffler will sound nice. Can't wait to see how it turns out
    -Andy
    1973 HLS30-166105
    RB20DET swap, HKS GT2530 turbo, HKS Actuator, Hallman MBC, ebay intake manifold, ebay dump pipe, straight pipe, 14 psi boost

  3. #3
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    Why don't you go parallel straight through under the tank, like the works rallye cars or the BRE 240 Z showed it ?

  4. #4
    NW Native JonnyRock's Avatar
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    Cool stuff Dave, can't wait to see it finished. Window worked out great btw.
    ***PREVIOUSLY OWNED***
    1970 Datsun 240Z
    HLS30-01704
    71,000 Original Miles

    - Jon

  5. #5
    Registered User madkaw's Avatar
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    Dave,
    I've done the same thing on my car, but I cannot attest to the results since my car is now just going back together. I like the idea of the muffler with the built is X pipe, I didn't think of that option. I just fabbbed my own. You probaly be done before me , so I can't wait to HEAR it. I share a few pics of my set -up, which is also 2" all the way.
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    Steve
    71 240z,bw-5sp 2.4-40 over,balanced,e-88,big valves,ported&polished, stage2,header, triple Mikuni's 40's
    3.90 Subaru STI LSD

  6. #6
    240Z Elec. Upgrade guy Zs-ondabrain's Avatar
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    Steve,
    I like it. I think I saw yours here or on HybridZ, that's kinda where I got the idea. Mostly from the fact that it's such a rare thing on the S30's. I didn't want a fuel cell and figured that cutting the tank was my only real option to keep the exhaust from being too low or below the fuel tank, which I didn't want. Can we get a picture of the tank area on yours?

    Andy,
    Thanks, I hope it sounds as good as it'll look. But then again, when it's done, it's done. I don't think I'll want to change it or pay for something different after it's all done. I'm already in way over budget and the car is barely half way done. Still gotta do more body work, paint, interior and other mods before it'll hit the road. I'm hoping for some more sales of HLH and PLH or anything else I offer (LED taillights, sidemarkers, SCP, ZXP, etc, etc.)

    Doehring,
    I actually wanted to go with the center exhaust tip, in the shape of a "Z" or a, oval or rectangle but didn't see it in the budget and the side exhaust (to the far right and left of the rear) seamed to be the most practical or easliy accomplished project.

    Johnny,
    Me too!! but waiting seems to be the name of the game at the moment. Glad to hear the window worked for ya. Been there, done that.

    I'll update when I can. Also look for my other write-ups that I'll post when I get time away from the car, kids, upgrades. etc.

    Davge
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  7. #7
    Registered User madkaw's Avatar
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    Dave,
    I like your tank option-I didn't think of that. I would hate to venture how much time I put into changing out tanks. I am using a CJ-5 plastic tank. It was square and fit in there nicely. It is a lot of work to make the 2 pipes out the back-I hope we are both happy with the results
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    Steve
    71 240z,bw-5sp 2.4-40 over,balanced,e-88,big valves,ported&polished, stage2,header, triple Mikuni's 40's
    3.90 Subaru STI LSD

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    240Z Elec. Upgrade guy Zs-ondabrain's Avatar
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    I love the plumbing idea for mock up. I'll have to keep that in mind. I could make the pipes and take them down to the muffler shop and say "Play BORG and Assimilate This"

    Then bring them home and weld them up. cool idea.

    Dave
    Rate my Z at Car Domain.com
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    Registered User madkaw's Avatar
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    It did help a lot to give me an idea of space constrictions. I just left all the tags on them and took them back(the ones I didn't cut) for my money back. You are also limited on your selection of turns.
    Great place for tubing http://www.mandrel-bends.com/catalog/
    Good prices for kits. I bought from them when I did my daughters 280zxt 3" exhaust. The pipe I bought for my 240 came from Stahl headers-mild steel.
    Steve
    71 240z,bw-5sp 2.4-40 over,balanced,e-88,big valves,ported&polished, stage2,header, triple Mikuni's 40's
    3.90 Subaru STI LSD

  10. #10
    240Z Elec. Upgrade guy Zs-ondabrain's Avatar
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    I want my system to have as few cuts and welds as possible. A kit just won't do on this project. I want 2 solid pipes from the header to the muffler, the muffler, then 2 pipes bend properly to go from the muffler-under the diff-past the rear bar and to the left and right-then out the back of the car. So basically... Header, 2 pipes, muffler, 2 pipes and that's it. Except for the hangers and tips.
    Rate my Z at Car Domain.com
    My 70' 240Z, Daily Driver

    My Parking Light and Headlight Upgrade Harness's at MotorSport Auto
    HLH - PLH - SCP - ZXP's at MSA *They accept PayPal!!*
    Headlight Upgrade Harness info here at ClassicZCar Club
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