turbobluestreak

not nessarly, if all bore spacing was constant like I plan on keeping it. You could just change the flanges on the Skyline manifolds and it should work with the head. I know the cams will fit in if I can keep on the towers alinged when welding my heads together. Well right now I'm reading like crazy and will most likely have a new design done by next week. tbs

Well I've been board in my 3D modeling class and took some measurements and made up an intake for injected L6's Check it out. JSK you want the prints? tbs

My problem with cnc is finding some one with a multi axis machine to make the ports. I was concidering it but I never finished any drawlings for it. It would be nice but I'm happy with just cutting up some heads for my DOHC head. There's just not enough people to care to go thought all the trobble of making a production head. Oh yah I'm in the works of desinging a new intake for the Injected L6! tbs

Bastaad525 go to http://www.rebelloracing.com and call them up and I belive talk to dave. and he'll tell you anything you want to know about the old days. When I talked to him the turbo z that was raced back in the day was a L6 the most powerfull US L6 if I remember and the head was ported by a guy in a very small shop with no flow testing equipment. After the head was ported the racing team turned it over to dave at rebello and to his suprise the head was almost perfect when it came to them some clean up and bam the head was ready for race. If I had the money these guys are the only people I would personally fully trust to work on my L6, they have the experience,ties with Nissmo,and proven set ups to make screaming z's tbs

If I remember correctly the L6 was copied or at least modeled after a Mercedes L6 engine that was dreamed up way back in mid to late 60's. Someone correct me if I'm wrong. Also after about 10 years of track testing Nissan knew that the L6 block wouldn't hold up to extreme horsepower that they wanted for future cars. So the L6 was put to rest. From its ashes the FJ20 was possible, from there Nissan designed the RB30, CA18, RB20, RB26, SR20, ect... I do believe that the F54 L6 block is a strong block if sonic testing check out. Also the L6 blocks are very wear resistant thanks to the high nickel content of the Iron used in production. tbs

hey Mack, the heads are on hold right now, I've been back in school for about a month and have a lot of homework to do and no time to get back in the shop. I still have them and want to finsih up on them this year but I need to make time for them. Although I have taken a step away from my 24 valve build up I'm porting out a N42 that I came across in a junkyard that will be placed on my z this winter, hopefully I can make some extra power to the z by a light porting/clean up, but only time will tell. http://hybridz.org/nuke/index.php?name=PNphpBB2&file=viewtopic&t=30558&highlight= tbs

Hey Chris240turbo , Since we live in America and everybody and their brother owns a small block or a big block the production of a set of heads is very easy to turn a profit off of. Another thing that has come to my attention is that ford and gm have released prints of engines to performance shops and machine shops. Nissan doesn't give out anything to anyone unless you can assure them that they will never be made public to anyone. Also if we even are "the birthplace of the machine tool" I don't know if we are or not but I do know that after 6 lectures from tooling dealers Europe leads in tooling and can machine to tolerances and surface finishes that we can only get by grinding after machining. My best guess as why the head never really became to profitable to keep in production was that they realized what a lot us have that the L6 N42 and P90 can be ported to flow enough to make power. I myself have just acquired a N42 that I want to port out. But I still like the idea of a 24 valve crossflow head on a L6 that’s why I haven’t' given up work on my custom head. Oh Mack if you ever decide that you don't have time to fix the EB head and graph it onto the L6 or something, let me know and I'll be more than happy purchase it to graph that onto the L6 block. tbs

Yes get a price I would like to see how much it is since the first production runs in the 70's was around 12k. tbs

F & W Crank in archbold OHIO 30minuets from me. I have yet to see them do a L6 head but I did see my friends 4G63 head and oh my god it was perfect. Not to expensive and they do great work all family owned an run. They have a N42 of mine and it's just getting cleaned but I do know that when you get your head back the chamber surface will be decked to a mirror finish and any and all pits will be repaired. Other than that in Defiance OHIO there is progressive and I've heard they do great work but nevery been there my self. tbs

Hey topless I'm still working on it. Just with summer break from college it's making it hard to work on my head. But I did find out that skyline RB cams would fit the head if I can keep the cam towers aligned. I might if I have to cut them off and mimic what Nissan did with the L6 cam towers. At the moment I picked up a N42 head out the junkyard and a N42 intake (intake for sale) and will be researching doing some extreme port and polish work to the head and extreme doesn’t' mean ports the size of my fist. I'll be taking this head every step of the way with a flow bench and rework the port similar to what has been discussed on the boards in the past to increase port flow and velocity. tbs

well turbo alternators use a different plugs, but best thing to do is the Maxima swap. Also you'll need the rack and pinion front crossmember for mounting the rack. If you still want to enjoy cruse and heat under boost you'll have to change over vacume canisters and install a vacume pump. tbs

ok I tried set my timming to 27 since the 83 FSM wants timming to be @ 24 + or - 3. OH MY GOD what a difference! a lot of my heistation is gone, full boost is made at 3500, and pulls veryhard tbs

well bastaad525 There is no cold start injector on a turbo intake, but on that intake there is a provision for it on that 280z intake. I have one intake reads Japan N42 and I'm getting ready to install it with my 60mm t/b. but I've allready removed the EGR, AAC, FICD, Air regulator, and CAT. I think theres a small stumble at idle but my boost gauge is reading 17 inches at idle Best solution convert to 300zx ecu and remove all that junk. tbs

thanks guys I'm going to reset timming now and get back with you guys on it and yes 4k is first gear. Also I have a hunch that the 3.90 isn't helping me out. tbs

I've done it, most everything is plug and play. but you need a zx rack and pinion because steering box is in the way of the turbo. If you are smart and want to use the turbo alternator then you might want to switch all the harnesses. between years sometimes pins outs change. I was luck I'm running turbo harness my drivers compartment, and a 81 GL in the engine and a 81 turbo harness converted for 84 ecu for the engine. Just remember that your clutch you have most likey won't hold the power of the turbo. if I think of anything else I'll let you know tbs

its a 57 trim, .63 a/r housing and I have no idea what trim or stage turbine. the turbine housing was orginally a .48 so I switched it out with my factory .63. would this effect boost? I'll try retarding timming a little an see if that helps. right now my timing set at 24 tbs

I don't know if it's my conquest IC, my set up or what but I've don't get full 14psi until 4k. Man this suxs what kind of remedies are for the boost lag blues? tbs

my t3/t4e is making a terriable sound when I make boost. It sounds like a small growlling puppy that totally drowns out every other sound my z makes. I'm stumped and need help big time. tbs

If you go and get that head I would love to take it off your hands. tbs

well it's my fualt for my slipping problem, I got so excited and just started ripping on my car with out really thinking about taking it easy and breaking in the clutch. I was running the HD PP 2100, and performance disc. My question is that if I take the six puck ACT disc, can I use it with my pressure plate that I have now? I didn't know if it slipping off and on for about 50 ish miles would damage it beond reuse with a 6 puck. tbs

guys my ACT performance disc, and Heavy duty PP is starting to slip at 13psi and I'm getting mad . Is there anything better then ACT to run on a turbo 280zx? tbs

I was told by the guys at rebello that the factory a spec cam found in the 240z's and in some early 280zx's with n47's on a stockish set up will be "b!t(h!n" Now go figure if any of you have seen the specs between the factory 81 b spec vs the a spec vs the 82-83 turbo I belive J spec some one corret me if I'm wrong. But the A and B are almost identical which makes the A spec work, thank god I had a n47 zx to donate me a A spec. tbs

great memories huh Scottie tbs

what color of cover did you get? red, blue, or polished? tbs

Hey I would like to see exhaust numbers, the intake sounds great but the exhaust is where my attention is. I hope you get this done, as for me I still think a 24 valve head would be better. tbs