BR3NNAN Posted May 14, 2014 Share Posted May 14, 2014 Ive been searching all over the internet on 5 lug conversations with out much luck. Ive read about the z31 front hub swap and redrilling the rear hubs, but I dont want the positive offset change from the z31 hubs and redrilling factory hubs seems sketchy. Ive read about a set up modern motorsports used to offer, but them seem to be out of business. Ive read about the TTT front hubs that retains factory offset, but they are $450. The $450 plus even the stage 1 wilwood discs all around from silvermine come comparable to Arizonazcars 4 wheel 5 lug wilwood disc swap. Im planning on building a high hp car, and I want it to be well rounded, which is why im considering the 5 lug swap. So my question is, is there a 5 lug hub swap that will allow me to use the silvermine wilwood discs and have them just swap the 4 lug rotors to 5 lug? For under $2200? And is 5 lug even 100% necessary for a street car/weekend racer that will see some track time(drag/road course), but not an actual "race car"? Quote Link to comment Share on other sites More sharing options...
logr Posted May 15, 2014 Share Posted May 15, 2014 You want to change to 5 lug but the majority of the 5 lug wheels offered are made for fwd offset so why worry about the z31 change? I went Z31 and JSK hats and love it. Checkered flag Joe offers the rear axles with 5 lug if you don't want to redrill. I am mainly thinking of larger diameter wheels but you will need that with most brake upgrades. Don't know about the Silvermine stuff. Personally I like the reliability of oem hubs and the functionality of large diameter rotors with 4 piston Superlights all the way around. Not sure if anyone makes the JSK stuff anymore but they come up for sale occasionally. It seems that someone should start making them again as they are a great option. The AZ stuff is an adapter that bolts to the stock axle in the rear which adds lots of offset. The front is an aluminum hub which has the hat bolted to it. I wonder if the offset is made to match the rears, don't know. Looking at the AZ rear, the rear adapter looks to be out an inch or so. My JSK hat is flush with the stock axle center. It would be possible to use hub centric spacers with the JSK stuff. I have 8.5 x 17 +30 RPF1's all the way around with no spacer in the front and a 5mm in the rear to clear the strut. I know I didn't really answer your question but thought some options and opinions of someone that has been right where you are might help. Quote Link to comment Share on other sites More sharing options...
BR3NNAN Posted May 15, 2014 Author Share Posted May 15, 2014 So you're saying the AZ stuff doesn't even keep the factory spec offset? Thats a bummer. Im still trying to decide on a rear end set up, but this is looking very promising http://lm.facebook.com/l.php?u=http%3A%2F%2Fforums.hybridz.org%2Ftopic%2F117668-the-ultimate-irs-swap-for-s30s%2F&h=hAQF1daco&s=1 I think that 8.8 rear end (which includes a 5 lug swap), some front z31 5 lug hubs(or the TTT hubs to keep factory spec), and a silvermine front wilwood kit, wilwood 1" master cylinder and proportioning valve, and 280z break booster (just started looking into boosters, someone chime in if you have a better suggestion) would be a very solid set up. Quote Link to comment Share on other sites More sharing options...
BR3NNAN Posted May 15, 2014 Author Share Posted May 15, 2014 http://forums.hybridz.org/topic/117668-the-ultimate-irs-swap-for-s30s/ Think I screwed up the link in my previous post and don't see a way to edit it (im on my phone), so heres the link to the 8.8 setup Quote Link to comment Share on other sites More sharing options...
G-E Posted May 16, 2014 Share Posted May 16, 2014 Depending how serious you are about the road racing, I produced a bbk for the z31 specifically with the z31 non-turbo hubs in mind (the cheap, easy ones to get) which could in theory work on the earlier Z if the hubs do... the only custom part would be the bracket, but the calipers are radial mount which makes that easy Now I have bored out a couple of the hats to 73.1mm to try on the earlier hubs, but I haven't yet had a chance to mock them up on an actual car to know if there's enough clearance, the hat offset is more than average... see more: http://www.ontariozcar.com/forum/showthread.php?2444-Response-Type-13-quot-front-BBK-for-300ZX-Z31 You'd push the wheel out 7mm relative to your bolt-on hubs using a setup like mine on your hubs (more if using z31 hubs), because the rotor now slips on, however the high hat offset will keep the caliper more inboard, you should have very good spoke clearance compared to other bbk's... Quote Link to comment Share on other sites More sharing options...
texis30O Posted May 16, 2014 Share Posted May 16, 2014 Will is working out the front 5 lug conversion for my set up. Quote Link to comment Share on other sites More sharing options...
BR3NNAN Posted May 16, 2014 Author Share Posted May 16, 2014 Yeah I PMed him talking about the rear end and he told me about the front set up that he's developing. My concern is, I have a set of the McKinney s13 coilovers (they're actually on order, I dont physically have them yet) and Im trying to figure out a way to use them instead of the koni set up. I dont see why I couldn't just weld the McKinney strut tubes to Wills strut tubes and call it good. Quote Link to comment Share on other sites More sharing options...
BR3NNAN Posted May 16, 2014 Author Share Posted May 16, 2014 Depending how serious you are about the road racing, I produced a bbk for the z31 specifically with the z31 non-turbo hubs in mind (the cheap, easy ones to get) which could in theory work on the earlier Z if the hubs do... the only custom part would be the bracket, but the calipers are radial mount which makes that easy Now I have bored out a couple of the hats to 73.1mm to try on the earlier hubs, but I haven't yet had a chance to mock them up on an actual car to know if there's enough clearance, the hat offset is more than average... see more: http://www.ontariozcar.com/forum/showthread.php?2444-Response-Type-13-quot-front-BBK-for-300ZX-Z31 You'd push the wheel out 7mm relative to your bolt-on hubs using a setup like mine on your hubs (more if using z31 hubs), because the rotor now slips on, however the high hat offset will keep the caliper more inboard, you should have very good spoke clearance compared to other bbk's... Cool man, I'll keep that in mind. Im still trying to figure out the best set up for my build before i start blindly dropping money on parts and realize something better is out there. Quote Link to comment Share on other sites More sharing options...
Silver Mine Motors Posted May 16, 2014 Share Posted May 16, 2014 We have put together five lug Z 31 hubs with Toyota forerunner front brake upgrades. If you want Wilwood I say get Z 31 hubs clean them up, change the bearings and races. Then get Our front super light wilwood kit. We would have to make you a custom spacer $110. The spacers are needed to move the Wilwood rotor in line with the caliper. I could also get Z31 hubs cleaned in acid bath, new bearings and races for $310 the hub will move your wheel out 3/4 inch, but that's good because many 5 lug wheels call for such an offset. as for the rear, It depends on your HP, you can get re drilled stub axles for lower HP safely, but if you have more than 300 WHP then I would recommend billet stub axles. earlier you asked if 5 lug was necessary. I say NO, I say don't fix it if it's not broken! 4 lug works fine, it can take power. Only reason I would convert is if your stuck on a particular wheel. Quote Link to comment Share on other sites More sharing options...
BR3NNAN Posted May 16, 2014 Author Share Posted May 16, 2014 Thanks for the info! Im not necessarily stuck on a 5 lug conversation. Im planning on having some serious HP and read that a 5 lug conversation was the way to go. To be honest, im just beginning to read about the different rear end options out there. So if theres a set up proven to withstand high HP and still retain 4 lug, that might be the way for me. I was planning on ordering one of the wilwood set ups from you guys(silvermine) next month, but all this rear end information is a lot to take in at once lol. Quote Link to comment Share on other sites More sharing options...
G-E Posted May 16, 2014 Share Posted May 16, 2014 I'd think the bigger benefit to the 5-lug is your wheel choices, but it will be torque that determines whether you overload the 4-lug, not just horsepower I made the rotors for my bbk dual drilled 4 & 5-lug for that reason, I didn't feel forcing people to upgrade to 5 just because of some notional improvement made sense; I have heard more people snapping axle stubs than wheel studs. The downside I see with the toyota caliper upgrade is that it's a heavy option, and still not the "heavy duty" 32mm rotor thickness like you'd want for racing, but again, it all depends on how serious you are... Quote Link to comment Share on other sites More sharing options...
Phantom Posted May 16, 2014 Share Posted May 16, 2014 So the question remains - what do you define as "high" HP? There are lot's of us with 325-400 RWHP cars running on 4 lugs with no issues. If you are building something well North of that then you need to go with a 5-lug conversion and get it over with. Quote Link to comment Share on other sites More sharing options...
Wedge Posted May 17, 2014 Share Posted May 17, 2014 Depending how serious you are about the road racing, I produced a bbk for the z31 specifically with the z31 non-turbo hubs in mind (the cheap, easy ones to get) which could in theory work on the earlier Z if the hubs do... the only custom part would be the bracket, but the calipers are radial mount which makes that easy Now I have bored out a couple of the hats to 73.1mm to try on the earlier hubs, but I haven't yet had a chance to mock them up on an actual car to know if there's enough clearance, the hat offset is more than average... see more: http://www.ontariozcar.com/forum/showthread.php?2444-Response-Type-13-quot-front-BBK-for-300ZX-Z31 You'd push the wheel out 7mm relative to your bolt-on hubs using a setup like mine on your hubs (more if using z31 hubs), because the rotor now slips on, however the high hat offset will keep the caliper more inboard, you should have very good spoke clearance compared to other bbk's... Where can we buy this kit ? Quote Link to comment Share on other sites More sharing options...
G-E Posted May 17, 2014 Share Posted May 17, 2014 Right now thru me... I'll PM Quote Link to comment Share on other sites More sharing options...
BR3NNAN Posted May 17, 2014 Author Share Posted May 17, 2014 I'll prob want to think about 5 lug in that case. Im currently researching extensively on building a stroker turbo L series. Im not sure how far I'll be able to take it, but lets say 600hp+ and ??? torque. Like I said before, i want to build it right the first time around. This car will most certainly be driven, so Im trying to build a well rounded car. Quote Link to comment Share on other sites More sharing options...
Phantom Posted May 17, 2014 Share Posted May 17, 2014 I knew a couple guys in Ft Worth that we're running L28's with 22-25 lbs of boost. They were getting a bit over 300 RWHP. Stroke it and you'll probably get in the 350-400 range. I'm not an expert on the L28 but 600 RWHP may be a bit optomistic? Quote Link to comment Share on other sites More sharing options...
BR3NNAN Posted May 17, 2014 Author Share Posted May 17, 2014 http://www.angelfire.com/extreme/280zxt/ Cruise around that site and I think you'll be pretty impressed. Believe me, the L28 has WAY more potential then we give it credit for here in America. I used to think the L28et was just a mild performance swap too. So I decided to educate myself on other peoples builds to get an idea of how far this set up could go. So of course I stumbled upon the electromotive 280zxT from the 80s and others of the like. Its amazing how much power you can achieve when you actually spend some time and money on actually building the engine and not just throwing more psi at it and taking the factory internals to the limit. Thats one of the main reasons why im STRONGLY considering this route (nothing is set in stone because I haven't actually started the build), i want to see just how far I can take it. Quote Link to comment Share on other sites More sharing options...
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