Guest Soup80 Posted November 13, 2003 Share Posted November 13, 2003 I know it is cheeper to get a turbo L28, but has anyone or is there a centerfugal super charger kit made for the L28? Is there a Vortech or Paxton kit available? If not can one be made? Quote Link to comment Share on other sites More sharing options...
Guest BigWhyteDude Posted November 13, 2003 Share Posted November 13, 2003 i dont think there is a kit specificly disgned for the L28 but you could pick one up and make your own brackets and piping if you wanted to. It wouldn't be that hard i dont think. let us know if you try it. Quote Link to comment Share on other sites More sharing options...
Guest Killer Zx Posted November 13, 2003 Share Posted November 13, 2003 http://www.jimcookracing.com he sells a manifold and supercharger setup for all l series engines kit also includes holley projection. Gain of 45% with stock internals. Quote Link to comment Share on other sites More sharing options...
Guest Soup80 Posted November 15, 2003 Share Posted November 15, 2003 I know Jim Cook has one, but that is a roots type blower. I am looking at something like a vortech supercharger(centerfugal). Quote Link to comment Share on other sites More sharing options...
Guest Nic-Rebel450CA Posted November 15, 2003 Share Posted November 15, 2003 A centrifugal supercharger would be a good idea, and would be pretty easy to setup. All you would really need to do is find a location to be able to mount it and run a belt to it and then make mounts to hold it. I toyed with the idea of such a setup before, but then I switched back to wanting to put in a V8. Quote Link to comment Share on other sites More sharing options...
Guest Soup80 Posted November 15, 2003 Share Posted November 15, 2003 I'll look into it...I will email vortech. Quote Link to comment Share on other sites More sharing options...
Guest Nic-Rebel450CA Posted November 15, 2003 Share Posted November 15, 2003 If you wanna save some big bucks, try to find a JY supercharger from a thunderbird or something. Quote Link to comment Share on other sites More sharing options...
Guest LedFoot Posted November 18, 2003 Share Posted November 18, 2003 I'm just about to put an Eaton M90 supercharger on my zed, if going for the supercharger, you may as well go a positive displacement. Nice constant boost around the whole dial! Just have to figure out how to fit the damn thing! Quote Link to comment Share on other sites More sharing options...
280Zen Posted November 18, 2003 Share Posted November 18, 2003 Whats the difference between a roots and a centrifugal type supercharger? Quote Link to comment Share on other sites More sharing options...
Guest Nic-Rebel450CA Posted November 18, 2003 Share Posted November 18, 2003 Whats the difference between a roots and a centrifugal type supercharger? A roots type is like the "blowers" that you normally see on engines. It sits on top of the engine or otherwise between the manifold and the carb/throttle body and has two splines to force the air in. A centrifugal supercharger looks like the front half of a turbo with a pulley on it (basically) and is mounted on mounts on the engine and is belt driven. Quote Link to comment Share on other sites More sharing options...
280Zen Posted November 18, 2003 Share Posted November 18, 2003 Would this work? http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&category=33741&item=2442582428 Quote Link to comment Share on other sites More sharing options...
Dayz Posted November 18, 2003 Share Posted November 18, 2003 I would go more with a supercharger like: paxton, ati... Bolt it on the side of the engine with a bracket, find a way to run a belt and there you go. They are not too expensive on ebay !! http://cgi.ebay.com/ebaymotors/ws/eBayISAPI.dll?ViewItem&item=2443769838&category=33741 Dayz Quote Link to comment Share on other sites More sharing options...
datsunlover Posted November 18, 2003 Share Posted November 18, 2003 Just my $.02 here, just bolting on a S/C and pluming it in is fine.. but wouldnt it be a bit much for the L28 FI/engine intarnals to handle? Wouldn't you have to lower the compresion some how? Quote Link to comment Share on other sites More sharing options...
Guest eric-z Posted November 19, 2003 Share Posted November 19, 2003 Just my $.02 here, just bolting on a S/C and pluming it in is fine.. but wouldnt it be a bit much for the L28 FI/engine intarnals to handle? Wouldn't you have to lower the compresion some how? I don't think so, just make sure they are the block, head, and internals from a l28 turbo engine. Quote Link to comment Share on other sites More sharing options...
Guest Soup80 Posted November 19, 2003 Share Posted November 19, 2003 Just a thought... Do you think a centrifugal SC would mount on to the mounts where the AC compressor sits? Quote Link to comment Share on other sites More sharing options...
Guest Smooth Operator Posted November 19, 2003 Share Posted November 19, 2003 Just my $.02 here, just bolting on a S/C and pluming it in is fine.. but wouldnt it be a bit much for the L28 FI/engine intarnals to handle? Wouldn't you have to lower the compresion some how? I'm goign to be slappin' a turbo on my 300ZX N/A with 9.0:1 pistons as soon as I get the money and the donor car. This should be interesting. I'll document it as detailed as I can. Quote Link to comment Share on other sites More sharing options...
Zsane Posted December 25, 2003 Share Posted December 25, 2003 The old syle roots blowers create lots of heat, most of them ran the carburation through the blower which cooled the unit and the charge a bit, they are not very efficient, the Eatons are a roots type, but the rotors are twisted and are much more efficient, should be used with the throttle body upstream of the unit with FI injectors downstream, an M90 displaces 90ci per rev and the M60 60ci and the M45 45ci, the cool part is setting up a bypass so the blower can be turned on or off, the M45 on the Mercedes SLK has a clutch like an AC unit. The Eatons will give good bottom end where the ATI Prochargers or Vortec units will give better top end boost, the Eaton runs cooler than the old style roots type but with a smaller pulley and higher boost would work fine with an intercooler, as will the centrifugal units. The screw type are compessors so should be sized for application like a turbo, the Autorotor screw type are very efficient and actually create most of thier heat at idle instead of in boost, Kenne Bell and Whipple use this configuration, cost is high but coming down, the Mazda Mellinia unit is a screw type and could work as well. Supercharging is the way of the future as can be seen by their increasing application in the industry, higher efficientcy than in the past, bypassing for economy or power, and streetability from good low end boost. We need to jump on this trend and see what we can do. Quote Link to comment Share on other sites More sharing options...
Zsane Posted December 25, 2003 Share Posted December 25, 2003 Ok, I made the calculations for blower size, boost, and supercharger rpm's and pulley sizes for an L28 using the math in the book "SUPERCHARGED! Design, Testing and Installation of Supercharger Systems" by Corky Bell and this is what I came up with. An 168ci L28 with 170 HP @ 5600 rpm has an airflow value of 217.78 cfm to support 350 HP you'll need airflow of 433.67 cfm, and a pressure ratio of 2.06 which comes to 15.56 psi boost. An Eaton M60 displaces 60ci per rev. and would have to turn 12,490 rpm to achieve this, this is close to the max of it's operating range but not above. With a 2.5" diameter blower pulley, the drive pulley would need to be 5.58" in diameter. Using an Eaton M90, the blower speed would need to be 8326 rpm, well below the max operating speed, with the same 2.5" blower pulley, the drive pulley would have to be 3.72". The M90 blower at it's max could flow 625 cfm at a pressure ratio of 2.94, and a blower speed of 12,016rpm, still less than the M60, boost would be 28.54 psi and a theoretical HP rating of 500hp. drive pulley would need to be 5.36" in diameter. and of course more fuel would be needed for all applications just as with a Turbo setup, and intercooling as well. So the Eaton blowers could put out some power on a Z car if set up correctly, I have a stock 77/ 280z sitting here that we never drive and I think this would be a great test mule for just a project, blower can sit on the passenger side and run through the intercooler in front of the radiator and back into the intake manifold, throttle body will be with the blower unit on the passenger side. Now to start gathering parts, low boost to start and more if that goes well. Quote Link to comment Share on other sites More sharing options...
zero Posted December 25, 2003 Share Posted December 25, 2003 not to knock your math or anything, but wouldn't there be a sizeable amount of drag involved with the charger, lowering hp. so to get that same 350hp, you would need to make somethink like a calculated 400 and use 50 to drive the blower. Just a thought. Quote Link to comment Share on other sites More sharing options...
SleeperZ Posted December 26, 2003 Share Posted December 26, 2003 I'm running about 350hp with my turbo setup, at 16 psi boost. The parasitic drag of the charger will have to be subtracted from that. Also keep in mind you will need an intercooler to run that level of boost. I'm sure that charger will not pump air above 15 psi without massive amounts of heat, and no real increase in air mass. But I've not seen a flow map, so that's where I'd start looking if you are serious. Quote Link to comment Share on other sites More sharing options...
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