datzenmike Posted April 28, 2010 Report Share Posted April 28, 2010 Planning on using a $50 240sx tranny in an L series bell housing. Maybe one day an S15 6 speed if I can figure out how to get it mounted in that bell housing. I have a basically new SPEC clutch left over from my Z car stuff that should hold 300hp, considering the weight of this car. If you are serious about running the NAPS head then put NAPS motor mounts on the L20B block. This will orient the motor into the same position as the Z and KA motors. This way you don't have to graft the L tranny case onto the 240sx 5 speed. The KA 5 speed will fit right on!!! Quote Link to comment
Master-O-Turbonics Posted April 29, 2010 Author Report Share Posted April 29, 2010 If you are serious about running the NAPS head then put NAPS motor mounts on the L20B block. This will orient the motor into the same position as the Z and KA motors. This way you don't have to graft the L tranny case onto the 240sx 5 speed. The KA 5 speed will fit right on!!! That is fascinating. I did not know the KA/NAPS bolt pattern was just a rotated L series pattern. Quote Link to comment
74datsun620 Posted April 30, 2010 Report Share Posted April 30, 2010 Awsume!!!!!!!!!!! I just got to ask way not 6" I beam rods aftermarked? This is common with costum pistons anything you want can be made. That would lighter and stronger. Quote Link to comment
Master-O-Turbonics Posted April 30, 2010 Author Report Share Posted April 30, 2010 Awsume!!!!!!!!!!! I just got to ask way not 6" I beam rods aftermarked? This is common with costum pistons anything you want can be made. That would lighter and stronger. Why? Prepped stock rods should be more than adequate for my purposes and relatively low RPMs for an L bottom end. 1 Quote Link to comment
Jester Posted May 2, 2010 Report Share Posted May 2, 2010 Look forward to seeing it done. Could you share the bottom end details? crank,rods,pistons. What CR are you aiming for. Quote Link to comment
Master-O-Turbonics Posted June 22, 2010 Author Report Share Posted June 22, 2010 Have free SBC headers: build turbo header. partially finished: Tacked up front half: and rear half tacked up: Now just have to modify the collector and weld on a T3 plate. Quote Link to comment
Master-O-Turbonics Posted July 12, 2010 Author Report Share Posted July 12, 2010 Just mocked up, gotta weld it to the stock intake manifold flange. Quote Link to comment
hang_510 Posted July 12, 2010 Report Share Posted July 12, 2010 Why? Prepped stock rods should be more than adequate :thumbup: rod failure has not been a problem in (high RPM) L motors. shot peening was recommened for where there was concern. Quote Link to comment
Skib Posted July 12, 2010 Report Share Posted July 12, 2010 :thumbup: rod failure has not been a problem in (high RPM) L motors. shot peening was recommened for where there was concern. the rod bolts are the weak links tho, I personally always replace with ARP bolts. over kill on a street motor but its worth buying them to know there not going to break even on a high HP/RPM motor Quote Link to comment
datzenmike Posted July 12, 2010 Report Share Posted July 12, 2010 True that Brian. Awsume!!!!!!!!!!! I just got to ask way not 6" I beam rods aftermarked? This is common with costum pistons anything you want can be made. That would lighter and stronger. Why after market. The Z20E comes with 152.5mm or 6.0085" rods from the factory. They come fitted with flat top pistons too and are 85mm so they fit the L20B.. Quote Link to comment
Master-O-Turbonics Posted July 13, 2010 Author Report Share Posted July 13, 2010 :thumbup: rod failure has not been a problem in (high RPM) L motors. shot peening was recommened for where there was concern. Agreed. Only rod failures I have seen in the L series were from oil starvation, or some other catastrophic failure. the rod bolts are the weak links tho, I personally always replace with ARP bolts. over kill on a street motor but its worth buying them to know there not going to break even on a high HP/RPM motor I'd not put anything but ARP hardware in the location of rod bolts, even on a stock restoration type rebuild. Nice thing about this little ITB intake setup is that you can see most of the back of the intake valve through the WOT position of the throttle body. I'll post more pictures once I get the intake welded up. Quote Link to comment
Master-O-Turbonics Posted July 14, 2010 Author Report Share Posted July 14, 2010 Dang that turbo looks big. lol Quote Link to comment
Master-O-Turbonics Posted August 25, 2010 Author Report Share Posted August 25, 2010 ok well looks like not many people really care about this engine. lol. Either in forums or real life. lol oh well I enjoy working on it. its relaxing to me if anything. Well I made some progress today. I guess thats a good thing lol. welded the half the intake runners to the Z24 manifold to mount the rearward dual throttle body, and my turbo for this beast: Quote Link to comment
Master-O-Turbonics Posted August 27, 2010 Author Report Share Posted August 27, 2010 Mocked up ready for final welding, then has to be machined flat on both mounting surfaces: Looking down through the throttle body... when its on the head you can see most of the back of the valve through the throttle body. Nice straight shot. Welding cast aluminum sucks. Quote Link to comment
N0RCALDIME Posted August 27, 2010 Report Share Posted August 27, 2010 Very nice! Love the work being put in here. I personally am fascinated at what you can make out of an L. Keep us updated! :thumbup: Quote Link to comment
Master-O-Turbonics Posted August 27, 2010 Author Report Share Posted August 27, 2010 Very nice! Love the work being put in here. I personally am fascinated at what you can make out of an L. Keep us updated! :thumbup: Thanks! I think the header I built will be used for break in without the turbo, but a heavy duty turbo manifold will be fabricated for the real deal. For the intake manifold I shortened it an inch from what I had planned so that it will be able to fit in a tighter engine bay. It took some extra TIG welding but I gained some space for the plenum. Quote Link to comment
sinner720st Posted September 24, 2010 Report Share Posted September 24, 2010 just a motivational post... i think what your doing is awesome, i personally like head z head a lot, even n/a... i think you will probably get close to 300hp with a good dyno tune... i see those sweet throttle bodies, but what are you going to use for fuel delivery, im guessing injection but see no bosses... Anyway, great build keep it up. i want to learn more about what you do to your head when you do it... Quote Link to comment
tHe 'Z' Posted October 2, 2010 Report Share Posted October 2, 2010 theres a problem with your car, theres no color, pls upload color photo lmao. nice work man, id love to see this work. im gettin ready to build a new z18et and doin research of late. will definately keep an eye on this thread Quote Link to comment
67 411 Posted October 8, 2010 Report Share Posted October 8, 2010 This is awsome man great project. Quote Link to comment
Master-O-Turbonics Posted October 21, 2010 Author Report Share Posted October 21, 2010 Should be picking up my base engine for the rebuild tonight if all goes as planned! Got all my rotating assembly ready, and just need machine work on the block! Quote Link to comment
hessianben Posted October 21, 2010 Report Share Posted October 21, 2010 ok well looks like not many people really care about this engine. lol. Either in forums or real life. lol oh well I enjoy working on it. its relaxing to me if anything. Well I made some progress today. I guess thats a good thing lol. Don't worry about the naysayers. you obviously have the skills you need to pull this off, and the creativity to do something unique. I for one, will enjoy watching this build. Kudos! :) Quote Link to comment
67 411 Posted October 21, 2010 Report Share Posted October 21, 2010 That intake looks sweet, don't listen to anyone this will be worth the time and money. Quote Link to comment
Master-O-Turbonics Posted October 26, 2010 Author Report Share Posted October 26, 2010 and another project ... Quote Link to comment
Master-O-Turbonics Posted October 27, 2010 Author Report Share Posted October 27, 2010 Finished stripping the block down this morning and took it to the machine shop for cleaning. When it gets back I will begin doing the standard race prep stuff to the block. Quote Link to comment
Master-O-Turbonics Posted November 2, 2010 Author Report Share Posted November 2, 2010 Before grinding work, after block cleaning.(note all the flashing, lots came off by me bending it off with my finger): After some interior deburring: Comparison of deburred to stock: Quote Link to comment
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