340lc and 440 lc restore and rebuild

[red19lite]

here a picture of the 77-78 wiseco i just had made, note the nice milled pin bosses with pin oiling

[red19lite]

here another shot at the new pistons they use a keystone .059 thick ring with a nice heavy duty pin for the rings +.020 PISTON BARE WEIGHES 214 GRAMS they have a dome like the 76 and 77-78 stock piston the port windows are similar to the jay sperry piston that bill stull has, its a little stronger piston not quite as lite weight i have them available in +.020,.040,060and .080, will have 76 pistons soon they will be similar but will be out of a defferent forging and will have the correct ring position for 76 xenoah engines{ is any body confused now} ;D

[red19lite]

here a side shot of the new wiseco

[red19lite]

ill get some pics up on the 76 pistons when they come in

[red19lite]

here a picture of trueing up the water manifold

[red19lite]

the head boss on the clyinder head can be off as much as .050 , here they are al counterbored the same after milling head, this alows same strech on all studs

[red19lite]

these are new 340 clyinders the counter bore for jug bolts were only faced half way on two of the four took .030 to equal every thing now jug bolts are square and all torque the same

[red19lite]

these are new 340 clyinders torque to squared crankcase half , the clyinders are new and are off .005 from each other, no wonder head gasket issues apply , clylinder will be marked as a matched set

[red19lite]

working on the 340 finally got a good used crank no rust on bearing and its true to .0015 alll the way thru, whos hording all those 30x68x16 bearings ???were did they go??

[red19lite]

the 340 head was in perrty good shape too just a lte cut to true up

[red19lite]

got the 340 bottom end together if any body needs a mag side seal i have some available

[red19lite]

got the 340 together bought new oem clyinders and pistons from snosnake, could not find any oversizes for this motor, what happened to them? where their not that many of them? OR DID SOME BODY HORED THEM ALL UP ?? any way new replacements are being drawed up now and will be around again soon.

[red19lite]

this 340 motor took longer than the 440, the stuff for the 440 theres more of it out there used, be nice to just order the parts even if they were expensive time is money too, looking for parts takes time and money, if you fiqure your time and cleaning and painting the used stuff adds up to

[red19lite]

here some more help 76 vs 77-78 cylinder head 76 is thicker and uses longer studs in the cylinder 77 -78 head has three bolt thermostat cover 76 has 6 bolt

[red19lite]

heres a easy way to tell the difference between clyinders 76 have gb44wr cast on them 77-78 have gb44w on them i have seen some chapparral lc cylinders have gb44w on them also they have smaller ports and no boost port above intake they will also fit 76 77-78 engines also with right piston 76 stlye or 74 chap two ring with correct thrust washer some maY have to have pin boss wilden for 77-78 connecting rod

[red19lite]

76 gb44wr cylinders have open boost port to intake ring end gap rides in the midlle of boost port note black line

[red19lite]

77-78 gb44w cylinders have boost port with closed end in intake port and the ringend gap rides off center the boost port the transfer ports are laid out a liittle different than 76 to allow the end gag not to ride in the post port for more durability and a stronger cylinder but the 76 cylinder has the largest transfer port area

[red19lite]

the intake port opening from the bottom of the clyinder measure the same on 76-77-78 clys with a ruler, if you were blue printing these ports you would have to set up a degree wheel off the crank and assy pistons and cylinders deck height base gasket thickness all play a part in you want to be highly tech on the port timings well do that later when i get into my mod motor, for now this is close enough

[red19lite]

transfer ports i get 46.5mm on 76 and 47mm on 77-78 clyinders from top of transfer to top of clyinder on a set of stock cylinders

[red19lite]

exhaust port 26.5mm to top of cylinder 77-78, 27 mm 76 cyilinder