Jester Posted June 8, 2014 Report Share Posted June 8, 2014 Another thing is that I read in a Z forum that the L series engine can handle up to 350 hp with the stock pistons?? Maybe.........with a six cylinder. Stock Nissan non turbo pistons will do about 4-5 psi all day. You want more, plan on pistons and a rebuild. I checked on the OZDAT.COM engine utility. Looks like the early turbo Z L28 pistons would be your best bet. It WILL require a 1mm over bore. And with a U67 head you compression would be 7.8. With a V912 head (for comparison) your compression would be 8.2. How much boost do you plan to put through this thing? If your plans are above 8-10, I would go with the lower static compression. Quote Link to comment
DATN510 Posted June 8, 2014 Author Report Share Posted June 8, 2014 Hi Jes. I plan on running between 8-12 lbs of boost. I've been doing a lot of research on the L series head, and found that 210 head in the right hands is a great starting point. Although the U67 head is a better match for my setup, I can't afford it and they are hard to find. My other plan is to open up my A87 head and create some space like the 210 head. Not much just a bit off the peanut part in between the valves and next to the spark plugs. What's your opinion on that? Thanks. Mike Quote Link to comment
DATN510 Posted June 8, 2014 Author Report Share Posted June 8, 2014 Hey Jes. What's your opinion on copper o-ring gasket instead of o-ringing the head? Mike Quote Link to comment
Jester Posted June 12, 2014 Report Share Posted June 12, 2014 Some great info here on Datsun L series cylinder heads. I had started building a turboed LZ2.3. I was going to use a U67 head. Honestly, I think it would be a waste of a A87 head to start grinding OUT the peanut shape. Just sell that head and buy a U67. You coming to Camby? I'll bring one with me. As for keeping it sealed with 12# of boost, I would O-ring the block and be done. You can rent the gizzy that does the work when you buy the rings. Quote Link to comment
wayno Posted June 12, 2014 Report Share Posted June 12, 2014 I would agree with Jester, just find a U67 head, it has all the things you need, it's an open chamber, it has big valves already, and it has the large intake runners, it's a win/win/win, you will spend more money modifying what you have than what you would spend buying a U67 head. You do not want to do anything with a 210 head, they have tiny valves, tiny intakes, it's like shoving air threw an hour glass, how much time you have? :lol: Quote Link to comment
DATN510 Posted June 12, 2014 Author Report Share Posted June 12, 2014 Hi Jes ,What do you want for the U67 head $. So whats your opinion on copper gasket? And using 280 zx Turbo pistons or what do you suggest for a gasket? Mike Quote Link to comment
Jester Posted June 19, 2014 Report Share Posted June 19, 2014 I'm not sure how the o-ring effects the head gasket. I have a buddy that runs rings on his race engine. I'll ask him and report back. I'll post up a pick of the head I have too. I'm n I think going to use it so it well be Ratsun priced. Quote Link to comment
DATN510 Posted June 20, 2014 Author Report Share Posted June 20, 2014 Hey Jes, im not O-ringing the block, instead I'm O-ringing the head gasket. Due to to many problems with leaking coolant and oil. Here is where im at, I order the z pistons but in a good way they fell through they didn't have enough in stock to complete my order. so I decided to get some forged pistons and with the u67 having 45.3cc compared to the A87 that has 841cc that's a big step up. Although I still need to create 10 more cc. with a 87mm bore piston with a flat top and a 32 mm from the center of the pin to the top of the piston with the stock rods I should get 55cc and can run boost as Hi as 20 psi. so how much are you gonna sell me that head for? And when can I get it? Again thank you for all your help! Mike. Quote Link to comment
DATN510 Posted June 26, 2014 Author Report Share Posted June 26, 2014 Hi all. Well here is where I'm at, I did a craps load of research and also spoke with Robello. I have ready to order some custom forged pistons: 87mm bore, 38.1 compression, -21dish gonna leave the head as it is. Maybe change the cam. Gonna O-ring the head gasket not the block and use a composite or felpro gasket, still working on which would work best? This is what Dave from Robello suggested, he also said using copper gasket is crap! I also purchased a rebuilt 280ZX 5 speed tranny with a center force clutch, does anyone know offhand if drive shaft off the z will fit? I will post pics later. Quote Link to comment
DATN510 Posted June 27, 2014 Author Report Share Posted June 27, 2014 <a href="http://s1212.photobucket.com/user/hocyplyer1/media/20140502_223439_zpsrwzqfxpz.jpg.html" target="_blank"><img src="http://i1212.photobucket.com/albums/cc444/hocyplyer1/20140502_223439_zpsrwzqfxpz.jpg" border="0" alt="datsun photo 20140502_223439_zpsrwzqfxpz.jpg"/></a> Quote Link to comment
hosestop@msn.com Posted June 27, 2014 Report Share Posted June 27, 2014 Hey I have a mid 80s truck ecu and dist,and intake if you need some stuff ,I had L18 turbo 521 with water inj. running side draft 48mm with o ringed block , some girl has my truck in LA now , two tone white and blue 521 still running 15+yrs. Quote Link to comment
DATN510 Posted June 27, 2014 Author Report Share Posted June 27, 2014 Cool, how was the power on it? I already have a distributor and a megasquirt for the Ecu. Did you use a copper gasket and did you have any problems with it leaking? Also what where you at for boost? Quote Link to comment
Son_of_a_Datsun_Guy Posted June 28, 2014 Report Share Posted June 28, 2014 You may have already answered this, but what ecu system are you using, and why did you decide to stay distributor driven? Quote Link to comment
DATN510 Posted June 28, 2014 Author Report Share Posted June 28, 2014 Im using megasquirt for an ecu. I like to keep it stock as possible and the megasquirt can control the dizzy for boost control its the 24 slot disc dizzy that megasquirt recommends. Quote Link to comment
DATN510 Posted September 25, 2014 Author Report Share Posted September 25, 2014 Hello Ladies and Gentleman, I just got my engine block, pistons and crank back from the shop and yes ill send pics. I was thinking about recording putting her back together, or at least pics. they will include: engine build, head install, painting of engine bay, turbo install and intercooler. I will be starting this weekend so stay tuned. Oh yeah does anyone know where to get a oil restrictor 40mm I can't seem to find one, if not ill just make one. I also need a thermostat housing upper and lower? Thank you a a all for being my friends! Mike 1 Quote Link to comment
DATN510 Posted June 26, 2015 Author Report Share Posted June 26, 2015 Hello all, I have a question, does anyone know how to wire the dizzy from a 84-85 nissan 280z - 240sx. Using the nissan trigger from megasquirt? My dizzy has a red,white green and black wires coming out, and need to know the correct way to wire it? I am going through the megasquirt to control the advancement due to the turbo. Once I get this figured I can start the car. Thank you everyone! Mike Quote Link to comment
datsun 160J SSS Posted July 20, 2015 Report Share Posted July 20, 2015 Mike did anyone come back to you on this ? Quote Link to comment
DATN510 Posted July 21, 2015 Author Report Share Posted July 21, 2015 No I haven't gotten a reply back yet. Quote Link to comment
DATN510 Posted May 6, 2016 Author Report Share Posted May 6, 2016 Hello all, I'm in a bit of a bind. The custom pistons i had made had some problems with the design. Unfortunately they damaged the block and crank, I can get them repaired but will cost more than i'd like. Does anyone out their have an L18 short block for sale or at the least a stock L18 crank? Thank you all for your help. Mike Quote Link to comment
Draker Posted May 6, 2016 Report Share Posted May 6, 2016 Post an ad in the classifieds. Cool build though! Sorry to hear about the engine troubles. Quote Link to comment
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