soullessjdog Posted November 26, 2009 Share Posted November 26, 2009 I have an 83 L28et engine but want a spare block to do work on i was wondering would an L28 from a 76-78 280z be suitable for a turbo engine build with a p90a head put on it I am just curious because a spare engine block to do work on would be nice and theres a 77 in a junkyard around me with no head i can get cheap. Quote Link to comment Share on other sites More sharing options...
skib Posted November 26, 2009 Share Posted November 26, 2009 They will be fine. The only difference with the F54 is it has siamesed cylinders, the biggest difference between the turbo and N/A L28 is pistons and head. Quote Link to comment Share on other sites More sharing options...
soullessjdog Posted November 26, 2009 Author Share Posted November 26, 2009 but the 77 block is an f54 block though right? Quote Link to comment Share on other sites More sharing options...
BluDestiny Posted November 26, 2009 Share Posted November 26, 2009 but the 77 block is an f54 block though right? nope. its a N42 block. It should be ok with a p90 head since it has dished pistons. It had a no quench head on it (N42 or N47 depending on produciton month) so the dished pistons were to make up for the lack of quench the head had. My .02 is that you should hold out for an F54 turbo block and if you can't find one with dished pistons, jsut get a flat-top block and buy a new set of dished pistons and do a ground up rebuild. Quote Link to comment Share on other sites More sharing options...
soullessjdog Posted November 26, 2009 Author Share Posted November 26, 2009 ok thats good just wanted to no if that block would hold for a turbo build it has dished pistons im going to forge the bottom end thats y i asked if it would be suitable to hold around 350-400 horsepower thats all. thanks guys for the imput it is greatly appreciated. Quote Link to comment Share on other sites More sharing options...
Xnke Posted November 26, 2009 Share Posted November 26, 2009 Ok. Time to correct this whole Siamesed-cylinder thing. As far as i can determine, this is correct. THE F54 BLOCK IS NOT SIAMESED. THERE IS A WEB WITH A HOLE IN IT BETWEEN THE CYLINDERS. A siamesed block means that the cylinders are cast in pairs, joined together, with no hole or gap between them. This describes the N42 block, NOT the F54. Sorry to shout, but I see this thrown around so often, it's not funny anymore. Quote Link to comment Share on other sites More sharing options...
BluDestiny Posted November 27, 2009 Share Posted November 27, 2009 ok thats good just wanted to no if that block would hold for a turbo build it has dished pistons im going to forge the bottom end thats y i asked if it would be suitable to hold around 350-400 horsepower thats all. thanks guys for the imput it is greatly appreciated. If you plan on forging the bottom end (pistons and rods) you will already have to pay for all the machine work and assembly (unless you plan to do that all yourself). If you do get the new pistons and rods, you should try to do a stroker build since all your missing is a V0 crank (about $300 to $400) or at least bore out to 88mm. Another thing, the rods and crank on these engines are already forged from the factory. Unless the engine went through some major abuse you can probably reuse the rods. Quote Link to comment Share on other sites More sharing options...
jc052685 Posted November 27, 2009 Share Posted November 27, 2009 If you plan on forging the bottom end (pistons and rods) you will already have to pay for all the machine work and assembly (unless you plan to do that all yourself). If you do get the new pistons and rods, you should try to do a stroker build since all your missing is a V0 crank (about $300 to $400) or at least bore out to 88mm. Another thing, the rods and crank on these engines are already forged from the factory. Unless the engine went through some major abuse you can probably reuse the rods. BTW the 500whp mark is obtainable on Junkyard L28's turbo or not. Quote Link to comment Share on other sites More sharing options...
Tony D Posted November 27, 2009 Share Posted November 27, 2009 rods are forged from the get-go on the nissan L Quote Link to comment Share on other sites More sharing options...
soullessjdog Posted November 28, 2009 Author Share Posted November 28, 2009 ok thanks guys i was going to get je pistions with an 88mm bore i thought about a stroker but cant find a vd crank. Quote Link to comment Share on other sites More sharing options...
PurePontiacKid Posted November 28, 2009 Share Posted November 28, 2009 that's probably because there's no such thing as a VD crank, it's a V07 Quote Link to comment Share on other sites More sharing options...
Tony D Posted November 28, 2009 Share Posted November 28, 2009 Not according to the guys at the Nipa Hut in Angeles City, 1987. There were PLENTY and MANY VD Cranks available there. I hear there are an abundance in Bangkok and Kuala Lumpur to this day. Zeero may be able to tell us, from anecdotes, of course. Though, if you're a stroker, a VD Crank is not something you will necessarily acquire. Quote Link to comment Share on other sites More sharing options...
ozconnection Posted November 28, 2009 Share Posted November 28, 2009 Not according to the guys at the Nipa Hut in Angeles City, 1987. There were PLENTY and MANY VD Cranks available there. I hear there are an abundance in Bangkok and Kuala Lumpur to this day. Zeero may be able to tell us, from anecdotes, of course. Though, if you're a stroker, a VD Crank is not something you will necessarily acquire. Oh dear, the other day it was inflatables, today its VD's and crank stroking......Tony, you need to get home ASAP and 'tend your flock' me thinks....badly Cheers mate. Quote Link to comment Share on other sites More sharing options...
Tony D Posted November 28, 2009 Share Posted November 28, 2009 How do you tell an F54 block from an N42 from only looking at the spark plug side of the engine? (Hint: Two or three distinctive features are different...) Quote Link to comment Share on other sites More sharing options...
FlatBlack Posted November 28, 2009 Share Posted November 28, 2009 One is the bung for the knock sensor to the left of the oil filter. The second is looking at the head number?? P79 or P90s came on F54s in the states... Quote Link to comment Share on other sites More sharing options...
Tony D Posted November 28, 2009 Share Posted November 28, 2009 yep, nope. block differences. What head is on it doesn't tell you anything reliably. I have seen E31's on N42's. Does that mean I have a P30 block? Not bloddy well likely when I can see the casting number is N42! There are at least THREE visible differences between an N42 and the F54 (both simply say 'L28' on the serial number stamping pad)...that are visible on the spark plug side of the engine block. What are they? Knock Sensor hole is one identifier of the F54, there are two others... husker du? Quote Link to comment Share on other sites More sharing options...
curt76280 Posted November 28, 2009 Share Posted November 28, 2009 My n42 and my f54 block have it embossed on the left side bottom of the block to the right of the engine mount . Quote Link to comment Share on other sites More sharing options...
Tony D Posted November 28, 2009 Share Posted November 28, 2009 My n42 and my f54 block have it embossed on the drivers side bottom of the block to the right of the engine mount . ARGH! Visible on the OIL FILTER/SPARK PLUG SIDE (the place on the intake/exhaust manifold side -passengers side in some markets- is usually obstructed.) The whole point of the exercise is to see if anybody besides me can spot the differences WITHOUT crawling under the car to see that number which is behind the headers/under the manifold. You don't need to, there are three distinct differences on the Spark Plug/Oil Filter side of the L28. What are they? We have ONE so far: the F54 has a Detonation sensor in the #4 Cylinder webbing. What are the OTHER TWO? Quote Link to comment Share on other sites More sharing options...
curt76280 Posted November 28, 2009 Share Posted November 28, 2009 On the right side at the top pf the n42 block there is a raised section with one line in it from top to bottom that lines up between #5 and #6 cylinder and on the f54 there is a second one that lines up in the center of #5 cylinder. Quote Link to comment Share on other sites More sharing options...
curt76280 Posted November 28, 2009 Share Posted November 28, 2009 And for the record on my 76 n42 block I can see the number fairly easy with the stock efi and ex. manifold while viewing from the top,the f54 is on an engine stand so it is really accessible. Quote Link to comment Share on other sites More sharing options...
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