mario_82_ZXT Posted December 13, 2006 Share Posted December 13, 2006 New winter project: supercharge and MegaSquirt my 280z. I just bought a M90 off ebay as I've heard talks of underdriving it allowing it to last longer, and also for upgrade potential (looking around some 3.0l BMW guys were unhappy with an M62). So far the plan is to move the alternator to where the A/C was, and use the A/C belt to drive it (thus underdriving the alternator). This leave the larger diameter puller to move the supercharger. The s/c would be mounting on the passenger side. So here's a few questions, can the supercharger be driven off the v-belt? I can't tell but it seems like the JCR kit was. Also, what are some mods that can be done to the supercharger? I saw on eBay a guy who made the slots on the output side of the supercharger smaller, claiming it produced more of the supercharger whine and boosted faster. Is that true? I'm going to run about 10psi with either an intercooler or water injection to start off. Ideas? Comments? Thanks, Mario Quote Link to comment Share on other sites More sharing options...
OlderThanMe Posted December 13, 2006 Share Posted December 13, 2006 I likey...have you seen the supercharged zx with the SC on the passenger side? It is along side of the the cylinder head. Be sure that you leave easy access to the spark plugs. Good luck Mario!! Quote Link to comment Share on other sites More sharing options...
thehelix112 Posted December 15, 2006 Share Posted December 15, 2006 It looks like (from net pics) the M90 pulley is 6-groove v-belt, with 6 grooves. The alternator pulley on the stock dampener is single groove, so one of the two will have to change. Not to mention do you really want to have your boost tied to your coolant flow? I would suggest leaving the alternator driving alone, and simply adapting a new pulley onto the front of the dampener. That is how mine worked when I was running a small SC14 supercharger. I am not sure on the specifics of the output slots, but I'll assume they are the openings in the housing where the air gets expelled? If so, adding any restriction between the supercharger and valves simply means there is more resistance to the supercharger as it tries to push the volume of air that it is geared to. If this restriction is too great it will just snap the belt, or in your case, the belt will slip. It will however make the air come out faster, but I think there will be less of it. You want as much air as is possible as pressure in the inlet tract is developed by more flowing into it than the engine can suck out. Dave Quote Link to comment Share on other sites More sharing options...
mario_82_ZXT Posted December 15, 2006 Author Share Posted December 15, 2006 Yea, thanks for pointing that out. I guess what I will try to do is find a ZX damper and use the power steering groove. This is what I was talking about: On the outlet port there are those two triangular peices (one on the top, one on the bottom), the actual s/c has a slit in each one of those peices. The "mod" that I saw was that they were partially filled in, thus creating a smaller slit. Hmm... I'll just post a picture of when I recieve it, it was sent yesterday Mario Quote Link to comment Share on other sites More sharing options...
zguy36 Posted December 15, 2006 Share Posted December 15, 2006 You can't transfer enough power through a single V belt to run your supercharger. Quote Link to comment Share on other sites More sharing options...
HoustonZ Posted December 15, 2006 Share Posted December 15, 2006 I just bought an M90 off ebay as well. It should be arriving this week. There is some decent info on hybridz about superchargers, but not a great deal of pictures. Let's try to change that. Quote Link to comment Share on other sites More sharing options...
thehelix112 Posted December 15, 2006 Share Posted December 15, 2006 Hmmm.. whatever the specifics, creating a restriction to the flow at the supercharger is probably not something you want to be doing. I wouldn't mind betting that triangular shape was the source of much research and development at Eaton. If not, it probably should have been. Dave Quote Link to comment Share on other sites More sharing options...
mario_82_ZXT Posted December 15, 2006 Author Share Posted December 15, 2006 You can't transfer enough power through a single V belt to run your supercharger. Well, to tell you the truth I'm waiting on an M90 install for some BMW I found online. He bought the v-belt pulley from a hydraulics place and is putting the s/c in place of his a/c. Let's see what results he gets... Another option is two v-belts, run an electric fan and use the smaller a/c pulley to turn the waterpump and alternator... If I can't use the v-belt, where do you get serpentine belt pulleys? I can't find the Arizona Zcar one's listed online anymore... If I can't do that then I'm waiting for 280zedx to come back from vacation and ask him what pulley off what minivan he used. Mario Quote Link to comment Share on other sites More sharing options...
SHO-Z Posted December 15, 2006 Share Posted December 15, 2006 What Bad things did you hear on the M62? I have one for my 260z webers forced induction that I want to put on. I am looking at using an Ford Lightning aftermarket lower pulley that will meet the ratio that I need. You might want to look for a machine shop and have them machine a lower pulley for you. Quote Link to comment Share on other sites More sharing options...
frank280zx Posted December 20, 2006 Share Posted December 20, 2006 im actually planning on twin charging.. turbo and supercharger ! but where to mount it is the question Quote Link to comment Share on other sites More sharing options...
OlderThanMe Posted December 20, 2006 Share Posted December 20, 2006 frank...interesting idea but how well will it work? You will have two sources of power drain...off the crank and in backpressure. I'd rather go with more of one than having both. A good SC or a really good turbo setup... I've seen the setup with a SC and 4 turbos on a V8 bonneville truck...but you won't be running flat out for a long time will you? just some thoughts...You can get over 500hp with a single turbo on a L6 but be a bit laggy...I have also seen Kjones's SC Z making around 250hp? Quote Link to comment Share on other sites More sharing options...
frank280zx Posted December 20, 2006 Share Posted December 20, 2006 well have you ever heard of the lancia delta s4 ? or the Nissan March super turbo ? they used the same principle .. in stock form.. given the group B lancia was a homologation model .. some after market tuners do the same http://www.alpine-developments.us/projects.html The turbo i have will support 600 HP not laggy at all .. however the idea is just way cool.. First it will be a turbo! and then when i worked out all the bugs and crap.. ill see if i can fabricate it like that .. again not looking at max power i want a flat curve .. and well because it can be done..and i have all the parts I would either mount it on the plenum or on the passenger side of the of the bay ( it would mean removing it to access the spark plugs YIKESSSS) Quote Link to comment Share on other sites More sharing options...
mario_82_ZXT Posted December 20, 2006 Author Share Posted December 20, 2006 Twincharging has been done by Japanese manufactures in the past, and VW is bringing it back IIRC... The BMW guy has had his car up to 5500 rpms, which for his setup is 8psi at this point on a v-belt with no slipping... I think I might try the v-belt route first... Mario FYI Frank I had typed this up before you posted yours but for some reason it wouldn't post... Quote Link to comment Share on other sites More sharing options...
mario_82_ZXT Posted December 20, 2006 Author Share Posted December 20, 2006 I've also seen a TT Supercharged WRX (it's in the Phoenix area, or was) that used the Mercede's electric clutch s/c and a pressure switch that would bypass the s/c and cut it off from the engine when the turbos finally spooled. Mario Quote Link to comment Share on other sites More sharing options...
frank280zx Posted December 20, 2006 Share Posted December 20, 2006 no problem mario.. you should talk to zya .. here is what he has done sorry for using it it was great info for me here is the post http://forums.hybridz.org/showthread.php?t=115673&highlight=supercharger+bleus Quote Link to comment Share on other sites More sharing options...
mario_82_ZXT Posted December 20, 2006 Author Share Posted December 20, 2006 Yea, I saw that. It's the JCR kit though. As much as I'd love to make my own manifold, I don't have the money or resources to do it at this time. On the other hand, putting it on the passenger side allows you to run an intercooler (eBay special or my large NPR). I just need to come up with a mounting plate and pipe adapter like 280zedx's setup, just lower, or find the elbow off a thunderbird or something. I'm ordering the v-belt pulley soon, apparently it has to be machined to fit the tapered bore of the eaton pulleys, and the nose will need machining or a delrin spacer made to prevent the pulley from rubbing. Or I can just try finding a pulley that's a better match... The s/c should be here this week... Mario Quote Link to comment Share on other sites More sharing options...
mario_82_ZXT Posted December 20, 2006 Author Share Posted December 20, 2006 Speak of the devil it just got here... The M90 came with the GTP manifold, TB, and MAF. The bad thing is the TB and MAF seem to be one unit... I was hoping to use the TB with a throttle cable... It's going to need a lot of cleaning, but at least everything feels tight. Mario Quote Link to comment Share on other sites More sharing options...
z-ya Posted December 21, 2006 Share Posted December 21, 2006 You absolutely want to use the serpentine belt for the SC. The V-belt will slip at high RPM. Even my 6 groove serpentine pulley slips if it is even slightly loose. Use the ZX damper and have a 6 groove pulley made that bolts on using the 6 threaded holes. Ken Jones had one made for his setup. I'm using a modified JCR pulley that I mounted the EDIS trigger wheel to. Quote Link to comment Share on other sites More sharing options...
kj280z Posted December 21, 2006 Share Posted December 21, 2006 Hey all, The serpentine pulley is a must... If you can use a 8 groove do it.. As for as the damper/pulley itself... I am running an MP62 with a custom CNC pulley that bolts to the ZX damper (you remove the power steering pulley and it bolts in place of it...) Mine makes 13 psi of boost with my current pulley ratios... Here's the problem... I have broken 4 of the stock dampers now... The solution? When I get some time I'm going to upgrade to an ATI damper and maybe even to an 8 Groove serpentine belt... Obviously I'm pushing mine to some limits, but the moral of the story is, the stock damper will not hold up in high boost applications... Quote Link to comment Share on other sites More sharing options...
kj280z Posted December 21, 2006 Share Posted December 21, 2006 Here's some pics that may be helpful: Quote Link to comment Share on other sites More sharing options...
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