slownrusty Posted November 11, 2006 Share Posted November 11, 2006 Guys - I have pulled my block out ready for a full all out build. I have the opportunity to purchase a diesel crank, to bump my displ. to the 3.0L or 3.1L region, is it worth the cost and effort or should I just stay with my 2.8L (L28ET), looking for first hand experience please! Thanks - Yasin Quote Link to comment Share on other sites More sharing options...
JMortensen Posted November 11, 2006 Share Posted November 11, 2006 No first hand experience, but I would suggest you compare the cost of doing the stroker to the amount of boost increase that you might get if you put that same money into a bigger intercooler, turbo, of aftermarket FI. Unless you're already pushing 25-30 lbs of boost, I'd reckon that you'll get more hp to the wheels by upgrading outside the motor... EDIT--I guess at some point you'll need forged pistons, well before you need the crank. The pistons are going to be necessary for sure for higher boost levels. At that point you need to weigh the cost of the crank and rods and KA pistons to the just plain old forged pistons and see what the difference is. If you're already resizing rods and all that and you have to do ALL of the machine work, it might not be too much more $$$ to add in the stroker crank. If you found a crank and rods for $300 it would probably be worth it. If you were talking about buying a stroker kit for $2000, then I still think that $2000 would make more power outside the engine. Quote Link to comment Share on other sites More sharing options...
Cal Poly Zmanaustin Posted November 11, 2006 Share Posted November 11, 2006 I agree with Jon. For NA I would recommend, but probably not the best bang for the buck on a turbo application. It's a nice upgrade, but you can easily and more cost effectively get more hp by other upgrades. Quote Link to comment Share on other sites More sharing options...
rztmartini Posted November 11, 2006 Share Posted November 11, 2006 how much do those cranks go for? I think it would be better spent on a good Alky injection system, and just up the boost. my $0.000000002 Quote Link to comment Share on other sites More sharing options...
Cal Poly Zmanaustin Posted November 11, 2006 Share Posted November 11, 2006 The money for the crank is secondary IMHO. You will have machine costs to bore the block, balance, etc. You are going to have much thinner cylinder walls on the block when done producing much more heat and losing much of the strength and durabiltiy of the block. Not a big deal for the street, but a much bigger deal if you want to go to the track and beat on it. When I had my L28ET I opted to not go with the LD crank because I was doing track events and the structural integrity limitation of the block was so easy to reach through cheaper mods. So it really depends on what you plan to do with it. If you do opt to increase displacement with the LD crank I highly recommend you match your pistons within 1/4 gram or better. Good luck. Quote Link to comment Share on other sites More sharing options...
greenmonster80 Posted November 11, 2006 Share Posted November 11, 2006 For a turbo motor I would use the money else where. For a N/A motor I love it. Quote Link to comment Share on other sites More sharing options...
TimZ Posted November 11, 2006 Share Posted November 11, 2006 The money for the crank is secondary IMHO. You will have machine costs to bore the block, balance, etc. You are going to have much thinner cylinder walls on the block when done producing much more heat and losing much of the strength and durabiltiy of the block. You don't have to bore the block to add a stroker crank, FWIW. The crank by itself will still get you close to 3.0 litres (2.95, as I recall). For the most part I agree with the others as far as spending your money elsewhere. However, it does heavily depend on what other things you are planning to do anyway. If, for instance, you were going to get forged pistons and L24 rods anyway, then it's a whole different story. Now you are just talking about the cost of the crank and a bit of extra work clearancing the block for the longer stroke. Not nearly as big a deal. EDIT - Oops I saw that Jon already added in pretty much the same info - sorry for the redundancy. Quote Link to comment Share on other sites More sharing options...
Cal Poly Zmanaustin Posted November 12, 2006 Share Posted November 12, 2006 You don't have to bore the block to add a stroker crank, FWIW. The crank by itself will still get you close to 3.0 litres (2.95, as I recall). He said he was looking for 3.0L or 3.1L region. Quote Link to comment Share on other sites More sharing options...
slownrusty Posted November 12, 2006 Author Share Posted November 12, 2006 Guys - Thanks for your feedback...Here is the thing, I am going to have JE make me a forged piston (8.3:1 compression) anyway and I can get the 240Z rods and LD crank. Really I can go either way, I hear what you guys are saying though. I know Jeff Priddy and Garrett are both running Diesel cranks without some impressive results and was using this as my basis, as I am going to have the entire block rebuilt anyway. Yasin Quote Link to comment Share on other sites More sharing options...
Guest 280ZForce Posted November 12, 2006 Share Posted November 12, 2006 GO STROKER BABY! I haven't gotten any dyno results yet, but the stroker should yield better power band of torque for sure compared to stock crank. Also, just sayin you got a stroker is a cool enough factor, not too many turbo strokers out there... should rack in some women for the "post your wife/gf thread" Quote Link to comment Share on other sites More sharing options...
510six Posted November 12, 2006 Share Posted November 12, 2006 It depends on what you want, for the money an L28 with a set of forged pistons would be a more cost effective way to go.I just like the way my current 3 liter comes up on the revs, the big turbo doesn`t hurt either.It sounds so cool.The current bore on my 3 liter is 87.5mm as I have run significant amounts of boost/N20 in the past with no problems. Quote Link to comment Share on other sites More sharing options...
slownrusty Posted November 12, 2006 Author Share Posted November 12, 2006 GO STROKER BABY! I haven't gotten any dyno results yet, but the stroker should yield better power band of torque for sure compared to stock crank. Also, just sayin you got a stroker is a cool enough factor, not too many turbo strokers out there... should rack in some women for the "post your wife/gf thread" Thanks J...LOL...!...cool factor...power and reeling in the laydees? How can I say no! Yasin Quote Link to comment Share on other sites More sharing options...
slownrusty Posted November 12, 2006 Author Share Posted November 12, 2006 It depends on what you want, for the money an L28 with a set of forged pistons would be a more cost effective way to go.I just like the way my current 3 liter comes up on the revs, the big turbo doesn`t hurt either.It sounds so cool.The current bore on my 3 liter is 87.5mm as I have run significant amounts of boost/N20 in the past with no problems. Great info Brian - thanks. Yasin Quote Link to comment Share on other sites More sharing options...
schwiplarkin Posted November 12, 2006 Share Posted November 12, 2006 yasin,,,do you have a hookup on the crank??? i would say go for it , but if you decide not to ill take it if its local and not crazy expensive!!! Quote Link to comment Share on other sites More sharing options...
Guest 280ZForce Posted November 12, 2006 Share Posted November 12, 2006 there is a couple for sale in the hybrid classifieds... $325 and $350. you should be able to get one for around $300 if you ask them. They are a lil pricey. Quote Link to comment Share on other sites More sharing options...
EvilC Posted November 12, 2006 Share Posted November 12, 2006 As time goes on do they get more expensive>? I have been around for the Z scene for only a year, so I do not have that first hand knowledge of prices of certain parts. Clive Quote Link to comment Share on other sites More sharing options...
schwiplarkin Posted November 13, 2006 Share Posted November 13, 2006 i have seen them around alot but will only go for one if its a great deal since i wont use it for awhile becouse it would be for my skyline . i want to start putting more effort into my v8240z this winter. Quote Link to comment Share on other sites More sharing options...
greenmonster80 Posted November 13, 2006 Share Posted November 13, 2006 If going for the torque factor wouldn't it be better to use something longer than the L24 rod? I know it is common place but there are better options out there.... Quote Link to comment Share on other sites More sharing options...
VG33TT Posted November 13, 2006 Share Posted November 13, 2006 How long of stroke will you get with this crank? Quote Link to comment Share on other sites More sharing options...
Sven Posted November 13, 2006 Share Posted November 13, 2006 83mm Quote Link to comment Share on other sites More sharing options...
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