majordanby

I am researching a 2.5inch exhaust for my S130 and I found the BORLA 40348 ProXS Muffler 2.5". I want to try and use that because it has a single 2.5" into it and dual 2.5" out of it. My theory is that having dual outlets will allow the muffler to release exhaust gas at lower velocity than having single in/single out. I am hoping that lower velocity will be quieter with similar performance to the single in/single out.

I am MostinMofia's older brother but I can't account for how he spells "Mafia." I appreciate all the input. I am in the middle of an S130 project myself, just trying to help a brotha out. Will post on my project later. We have the dual SU Carbs for the L24. The L28 we are going to use has an N47 head. Do the SU carbs bolt right up to that head without a problem? Or do we need to use the L24's head (I think it's a E88)?

Thanks for the input, BRAAP. Like I said in the OP, I am comfortable with some moderate fabrication. I have a full compliment of tools, a nice welder, space and time. I won't be sourcing out the fab work, I'll do it myself. I have several years of welding experience and a family member that is a mechanic/fabricator. I'm not going to cut the whole car in half with a torch and start putting in a tube frame or anything silly like that. I am also very aware that the s30 and s130 are 2 different cars. My first priority is the rear brakes. I don't want to source out a rear drum to disk conversion if I can use what is on hand. As to the front, fabbing up some new t/c mounts on the front is reasonable. I was planning on making some adjustable t/c rods while I was at it anyway as per the stickied thread. Slight modification of the ZX cross member to fit is fine. Also, I have the ZX rack and pinion steering rack, not the recirc/ball type. Since the linkage will be different length I can try and use the ZX linkage, or section out some of the original steering linkage. I want to fit in the ZX cross member with the ZX control arms to the bottom of the whole ZX strut assembly. But if the dimensions are off then it won't be worth it. If they are close enough, I can set up the proper mounting points for the other bits. This is all in the brainstorming stage as it is anyway. I won't be able to plan much more until I have both cars side by side and start taking measurements. If it the numbers don't match up to my liking within my comfort level given my skill set, I'm not going to waste my time with the old parts and I'll buy the well researched bolt-ons. It's true, I'm considering a lot of work to use some low end aftermarket parts. I am looking at it more for the disc brakes and the opportunity to make the suspension fully adjustable than some tokico bits I already paid for.

I don't have the 260z chassis yet. The front crossmember should be the same, so I could use the same control arms/ball joints etc. The tension rods might need some different mounts. Checking spring dimensions is a great idea though.

I realize that I'm new here, but I have been reading Hybridz for over 2 years and I need some input. I read all the stickies I could find close to this, but alas I need the input of seasoned professionals. I have a '79 280zx, it is actually my 3rd 280zx. I had one '79 that the brakes failed and I wrecked and an '81 2x2 parts donor. I have a rebuilt L28E with the N47 head on it with various upgrades, nothing past stock HP numbers. I am looking into a 260z chassis to put my L28E and 5speed into. I realize there are some real differences between s30 and s130 chassis. However, on the ZX I have new Tokico springs and Tokico HP struts, as well as the MSA slotted/crossdrilled rotors and stainless steel brake lines. These parts have less than 2000 miles on them. What is the dimensional difference between the '74 260z struts and the '79 280zx struts? Am I wasting my time trying to fit the parts I already have on an earlier model Z? Will attempting to put the late model parts in an earlier model completely ♥♥♥♥ up the suspension geometry, or will the s130 struts and hubs (built to stronger tolerences) help strengthen the 260z. If I can fit the whole strut assembly in, I plan to use the 280zx brake master cylinder to set up the brakes. Will the control arms tie in? When I swap the engine I plan on swapping the whole front crossmember, (and if it fits, the front control arms due to the adjustable camber bushings I already have in the crossmember). Am I pissing up a rope or do I have a servicable idea? I am wholly comfortable with some moderate fabrication work and have the resources to do it. If this is too ambitious I can always sell the parts I bought, even at a significant loss and do things the right way. If my idea works out though, then it will forgo the rear disc conversion that I would eventually do anyway and save me buying a new suspension. Hey some lucky 280zx owner on these forums might get a deal on some lightly used suspension and brakes.