Guest zline Posted September 24, 2003 Share Posted September 24, 2003 Hey guys...I havent been on this board for a while...I decided I'd contribute again with a crazy RB20 stroker setup designed to give 2.4L final displacement. RB20 block RB20 head is retained with GT-R valve springs RB26 crankshaft RB26 connecting rods Tomei 82mm forged piston set Nismo Oil & Water pumps Series V RX7 550cc injectors as with any stroker buildup, clearancing is required as well as numerous mock ups to check clearances. This setup with a small turbo yeilds 380hp @ 6500rpm and has a 8250rpm redline, with a large turbo 600hp has been attained with almost no change in redline. Quote Link to comment Share on other sites More sharing options...
Guest Zachb55 Posted September 25, 2003 Share Posted September 25, 2003 sounds like a very doable and powerful setup. a different route but one that sounds very interesting... do you have a site with information on this setup? you sound like you know of a few people running this.. -Zach Quote Link to comment Share on other sites More sharing options...
Guest zline Posted September 25, 2003 Share Posted September 25, 2003 Power Garage Tessta Rossa in Japan pretty much pioneered this, I've seen their diagrams for assembly and what not. it's quite simple, its just boring and clearancing and then rebuilding as if stock. I'd use nismo main bearings and all new main caps etc., however. it's also quite popular in Australia. Basically if you want a big power low budget RB this is for you! I'd run a R33 GTS gearbox behind it..the RB20 box is fine, but the added insurance is nice. The crank can be had for less than $900 AU, rods $600 AU the pistons from tomei are $1200 for the whole kit, circlips rings etc., etc., This is off the subject but Tomei has a L6 carb manifold now =) Quote Link to comment Share on other sites More sharing options...
Guest Zachb55 Posted September 26, 2003 Share Posted September 26, 2003 low budget eh? deffinately sounds like the route for me! maybe in a couple years, im still just dreaming about engine swaps at this point. -Zach Quote Link to comment Share on other sites More sharing options...
Guest zline Posted September 26, 2003 Share Posted September 26, 2003 alright, the main thing with this is...you need to assemble it with care if you like i can translate and supply you with a diagram for assembly. it's not difficult at all, you need a good contact in australia though...I can prob get you the crank rods and pistons for a little over $3200 which is GREAT considering it'll coem out cheaper int eh end than an RB25/26 with better power output and it already comes with a T3 flange manifold! Quote Link to comment Share on other sites More sharing options...
Guest Walkingpig Posted October 1, 2003 Share Posted October 1, 2003 Zline I am currently trying to source a cheap rb20 front cut and now i'm goin to keep my eyes open for the parts you talk of. I would love to see some diagrams that you speak of! as with any stroker buildup, clearancing is required as well as numerous mock ups to check clearances. I'm not sure about this process.. what time is involved with it... as its mechanics time which is my money:) also you say 380HP... is that on a standard rb20 turbo with stock boost or at what settings? sorry for the nievety, i'm quite new to this stuff Quote Link to comment Share on other sites More sharing options...
Guest zline Posted October 2, 2003 Share Posted October 2, 2003 no way...the RB20 comes in at about 210 hp stock the 2.4L stroker comes in, with some work at about 380ps. The diagrams will be pretty useless to you if you cant read kanji. You're lucky you live in AU...talk to your local nissan dealer parts department! Quote Link to comment Share on other sites More sharing options...
Guest Walkingpig Posted October 2, 2003 Share Posted October 2, 2003 what i meant was, the 380hp.. what else ie - turbo, boost settings, were changed to make this figure... Quote Link to comment Share on other sites More sharing options...
Guest zline Posted October 2, 2003 Share Posted October 2, 2003 oh, 1.2 bar boost hybrid turbo GT-R valve springs everything else factory. Quote Link to comment Share on other sites More sharing options...
Guest Phailure Posted October 24, 2003 Share Posted October 24, 2003 do you think you could send me the diagrams (email: neo_tridagger@yahoo.com)? I am japanese so I'll hope that i can read them. Thanks! Quote Link to comment Share on other sites More sharing options...
Guest RPMZ Posted October 24, 2003 Share Posted October 24, 2003 I have seen a setup like this in Australia, but the car arrived from Japan like that. The only problem with the setup is it still uses little RB20 valves, which are much smaller than RB25 and RB26 so if you chasing BIG horsepower you might want to change those. Also the exhaust manifold is for a small T25, and the oil pump isn't big enough if you want to do some circuit sprints. Air flow meter can only flow so much so you'd want to put on a Z32 unit, or change the ECU to MAP after market unit and you can loose the air flow meter. The intake manifold also isn't that big. By the time you do most of these mods it is cheaper to buy an RB25 or RB26 motor. I was lucky enough to find an RB26 without turbos from a friend whom does a lot of GTRs for only AU$2000 (bargain). I also run the idea of RB24 by him, and even he said it will end costing too much to get big numbers out of it. Quote Link to comment Share on other sites More sharing options...
Guest zline Posted October 25, 2003 Share Posted October 25, 2003 I have seen a setup like this in Australia' date=' but the car arrived from Japan like that.The only problem with the setup is it still uses little RB20 valves, which are much smaller than RB25 and RB26 so if you chasing BIG horsepower you might want to change those. Also the exhaust manifold is for a small T25, and the oil pump isn't big enough if you want to do some circuit sprints. Air flow meter can only flow so much so you'd want to put on a Z32 unit, or change the ECU to MAP after market unit and you can loose the air flow meter. The intake manifold also isn't that big. By the time you do most of these mods it is cheaper to buy an RB25 or RB26 motor. I was lucky enough to find an RB26 without turbos from a friend whom does a lot of GTRs for only AU$2000 (bargain). I also run the idea of RB24 by him, and even he said it will end costing too much to get big numbers out of it.[/quote'] I've had good luck with it. basically I just use other oilpump front covers from other RB engines for better oiling as well as GT-R springs and enlarged valves Quote Link to comment Share on other sites More sharing options...
Guest zline Posted October 27, 2003 Share Posted October 27, 2003 Here's the diagram for whoever wants it Quote Link to comment Share on other sites More sharing options...
Guest FinalRights Posted November 9, 2003 Share Posted November 9, 2003 Kinda off subject,kinda not. Which engine would have a higher hp/tq roof? The rb20det stroked to 2.4l or an l28et stroked to 3.1l? I've seen costum twin turbo set-ups for the L28et,the only thing I wish was there was a dohc swap. Quote Link to comment Share on other sites More sharing options...
akeizm Posted November 9, 2003 Share Posted November 9, 2003 your sayinf 3200 for the pistons etc. how much for the motor? cause i can' get a rb26det for 5,500 (about 3 grand your cash) with the gearbox. Quote Link to comment Share on other sites More sharing options...
Mack Posted November 9, 2003 Share Posted November 9, 2003 A DOHC SET-UP FOR A L28?? yeah, I wish someone would come up with a decently priced alternative using some other nissan 4 cylinder heads so that you could get the thing with factory parts. .... muahahahaha!! now, this may be feasible if only there was a DOHC head readily available that will fit on a L20B motor..... oh wait, there is! http://www.nissaninfiniticlub.net/forums/showthread.php?s=&threadid=40742 now, that thread is useless without this thread....... http://www.malvernracing.com/php-bin/phorum/read.php?f=6&i=102&t=1&PHPSESSID=6d60c3a5aa7332138bde87fd7043986d have fun with this one. I knwo I will as soon as I find someone that can heliarc aluminum fiarly well. McAdam Quote Link to comment Share on other sites More sharing options...
Guest FinalRights Posted January 21, 2004 Share Posted January 21, 2004 Ok,I have no idea what the hell you are talking about in this post. For some reason you mentioned the L20b,I was talking about the l28et. Quote Link to comment Share on other sites More sharing options...
Mack Posted January 21, 2004 Share Posted January 21, 2004 well, it all depends on how much you know about L series motors. the L series 6 cylinder motors are basically L 4 cylinders that have been cut in half and had 2 more cylinders added to the middle. This is quite evident when you look at the intake manifolds on an L28 vs an L20b. when L20B people want injection manifolds, they take an L28 manifold, cut out the middle 2 cylinders and the re-weld the halves togethor. and it pretty much bolts on. The L series 4 and 6 cylinder engines share very similar coolant and oil flow paths. hell, an L20B head gasket will pretty much match up hole for hole to an L28 gasket. I've had the 2 side by side. other than the fact its 2 cylinders short, its spot on. so, now that we know this, whats to stop someone from taking a KA24DE head (or 2 I guess) cutting it in half, then sticking 2 more middle cylinders inbetween the half and re-welding the whole thing back togethor? other than some very excellent heliarc skills being needed, some machining work on the heads and custom camshafts, nothing really.. I bet you could do this and come in for under 1/4 the price of the O.S. Giken head and everything on the head would be stock nissan, except for the valve covers, camshafts and manifolds. McAdam Quote Link to comment Share on other sites More sharing options...
davidh Posted January 22, 2004 Share Posted January 22, 2004 hey zline! you said tomei makes L6 CARB INTAKES!?!? how much they run??? and do you know a web sight or do you have pics?? Quote Link to comment Share on other sites More sharing options...
Guest zline Posted January 22, 2004 Share Posted January 22, 2004 yes they do make carb intakes. Depending on the carb, the price changes. 44PHH mikuni / 45DCOE Weber = Y45,000 50PHH mikuni / 48DCOE Weber = Y55,000 comes with: manifold linkage carb insulator carb insulator gasket misc bolst and nuts to make it work Quote Link to comment Share on other sites More sharing options...
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