Guest Stoker3.0Z Posted June 5, 2005 Share Posted June 5, 2005 I bought a L26 for $50 and have since torn it apart and sold what I didn't want and cleaned up and painted the block. It is about to go to the machine shop for magnafluxing and if it "passes" then I'm going to get it bored .40 over. The owner of the shop recommended getting the deck resurfaced before seeing the block. What do you guys think? It costs $125 and I'm not sure if it is worth it. This is going to be a built NA motor later on in its life. I'm just building it to build it. I am also building a L28 Stroker, so it probably won't see much time, i just want to have it around just in case. Would you guys recommend doing anything else to the block while its there? Thanks alot, Stroker3.0Z Quote Link to comment Share on other sites More sharing options...
Guest Want aZ Posted June 5, 2005 Share Posted June 5, 2005 A built NA Motor, I would do the following: Hot tank & Clean Magnaflux, Deck, Align Hone Crank Journals Bore if necessary Hone Just remember to thoroughly clean the block after its return from the shop, Wash down with Soap & Water, and remember to Get all of the oil passages this is important, nothing like putting clean internals in and getting sand in your bearings on start up.... after the wash lightly oil Quote Link to comment Share on other sites More sharing options...
zcarnut Posted June 5, 2005 Share Posted June 5, 2005 Decking, magnafluxing, and line boring the crank journals on an L-series block that will only see street duty is unnecessary, IMO. I have re-built about a dozen L-series engines (including two strokers) and I have never had to resort to any of these procedures. The only blueprinting “frill†I do is to have the reciprocating parts dynamically balanced. Block deck unevenness can be measured with a machinist straight edge. If the crankshaft bearings show an uneven wear pattern then you can measure the crank journals (and crank) for straightness (see “How to Modify Your Nissan/Datsun OHC Engineâ€). In the text “The Design and Tuning of Competition Engines†the author states in the excellent chapter on the L-series engine: “The Datsun cylinder block is outstanding for its strength. The quality control is well above average at the [Datsun] factory and align boring and deck milling can be bypassed by a person building an engine on a budget.†If you want to Magnaflux something, then concentrate on the more stressed items like rods and the crankshaft. Nissan blocks do not have a reputation for cracking (heads, however, do). I have seen a few problems caused by unnecessary machine shop work. Remember the old saying, why “fix†something that aint’ broke. Parts for these engines are very expensive. Save your money for items like a new harmonic damper and new connecting rod bolts. Quote Link to comment Share on other sites More sharing options...
4everDATSUN Posted June 5, 2005 Share Posted June 5, 2005 depends on what you what you plan on doin to the block. but i have done a little research on a product called glyptol. you can coat the inside of the engine and it seals in the casting sand. i think there are a few guys here that use it. Quote Link to comment Share on other sites More sharing options...
Here comes trouble Posted June 5, 2005 Share Posted June 5, 2005 Why limit yourself to a 1974 L 26 #P30 block of 2600 CC... Start with the best block:'81-83 280 ZX # F54 block.with stock flat top pistons and a P79, p90 or p 90 a head will give you 8.8:1 compression. The p 90 head flows with larger valves. Without buying a lot of expensive new parts you can swap a lot of good used Datsun parts. Decking an engine sight unseen is crap without any prior measurements first. You can do so much more with the 81-83 blocks not to mention many parts that can be utilzed for performance. Do not underestimate the quality of Datsun engines and parts. Quote Link to comment Share on other sites More sharing options...
Guest Stoker3.0Z Posted June 5, 2005 Share Posted June 5, 2005 The only reason I'm even building this engine is because I got it for $50 and sold alot of stuff off of it and made about $80 (I still the dist., clutch, tranny, block, head, valve cover, ect.) The only things I sold were the crank, rods and pistons, the carbs and intake manifold, and the camshaft. I still have the rest of the engine. I knew it was a good buy so I bought it and now I'm just going to build it for fun. I also have a 1978 FI L28 and I'm going to buy a 1981 L28 Turbo in a few weeks from a guy. Like I said this engine is just being built for fun and possibly to sit on an engine stand in a shop (to be opened soon) so I can tell people that ask what is done to it. Or possibly for a swap into the Z if anything ever goes wrong with the soon to be stroker engine. Thanks alot, Stroker3.0Z Quote Link to comment Share on other sites More sharing options...
Here comes trouble Posted June 5, 2005 Share Posted June 5, 2005 MHO.. sell the block also and make more money and wait for another good deal on a better engine or one you can make pocket money with...... don't fall in love with a 2600 when you can have more. You have the right idea buy some more and sell off the parts which could be fun and profitable. Quote Link to comment Share on other sites More sharing options...
Guest Stoker3.0Z Posted June 5, 2005 Share Posted June 5, 2005 Thats a really good point. Hanve't thought of it that way. Do you think I should go ahead and get the block bored and honed, that way it will bring in more $$$ or should I just sell it cleaned and painted? The total of machine work won't cost but $125 or so. Thats magnafluxed and bored .40 over. Do you think I would recoup that money or is it not worth the effort?....Thanks alot for all these great suggestions. Stroker3.0Z Quote Link to comment Share on other sites More sharing options...
Here comes trouble Posted June 6, 2005 Share Posted June 6, 2005 If the block was magnafluxed,bored and honed...it would be worth more....but hopefully more members will join in on value..... I would assume your market would be with a restorer with a 260 Z....my estimate would be in the neighborhood of $200.00 plus ????? Quote Link to comment Share on other sites More sharing options...
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