dont think this is going to buff out

[storminnorman07]

almost ready to start cutting ;-) just need to find some damn time. one class got canceled so i turned the guides and milled the intake

 

[sean01]

getting a good secure jig is the only pain in the d@ck. if can be done either in the lathe via face plate or if you have a big enough 4 jaw or mill. i typically deck mine via mill cause jig time is less.

on a side note maybe you may be able to give me some knowledge. with these case heads it seems like i always have a problem with pitting and its driving me flipping nuts. i have tried acetone, using a carbide and digging a lil bit i have tried different stick all with the same results when im done welding it looks fine but once i get the head decked to were its back to factory alumiunum lil pock marks.

yeah thats pretty standard with welding old alloy these days, as an engine reconditioner i can vouch for heeeaps of porosity holes during welding them up..

one thing we found was to bead blast the hell out of them.. and heat them with an oxy.. maybe even in an oven..

just remember tho if the holes arent on the compression section of the head gasket then they will do no harm.. if your still sus on them, devcon the holes up unless there in the combustion chamber..

as for your pic above, it seems someone has stolen your 2 top manifold bolt holes lol

 

[The_GDFP]

Nice orifice

 

[storminnorman07]

didnt have a whole heck of alot of time today but did manage to lay some more stick in the exhast massage the ports a lil better to get an idea if i need more weld before i get to cutting out for the seats. what you think terry, almost can sling that dead cat in her still catching some whiskers though once i get the seat in i can determine how much more i can cut. whats the id of the exhaust you plan on running?

 

[fiffty _boytim]

i was chatting to my mate who specializes in alloy welding he said oven the head to about 180 and he said try a certaion gas mixture wich welds smoother cant remeber what it was though lol . it will be fun i will up load pics as i go asweall

 

[The_GDFP]

Looks great! But,,, did you get your chores done before playing? lol
Mathing-out the S35D overlap puts them that deep? I'll get a cam and rockers out to yo today. If it goes 64x53, It can run a Lifan rod with 14mm pin Wiseco, and you can cut 3mm from the deck if needed. 66x51, same deal, 100mmx13 rod and a 3mm slice, or 97 and no cut. Or, since you know the number to JE... What about cutting the bore size up in to the chamber and moving the ring pack down a bit? I'd hate to add crevice volume, but putting piston above deck is no fuzz. 67x49.5 plays ok, if that Tak can have it's pin hole opened, or use a Lifan 107 crank. Kurlon has broke a couple, but with crank-mount clutch.

 

[storminnorman07]

i was chatting to my mate who specializes in alloy welding he said oven the head to about 180 and he said try a certaion gas mixture wich welds smoother cant remeber what it was though lol . it will be fun i will up load pics as i go asweall

ill have to try that out. please do post some pics im curious to see how that works

 

[storminnorman07]

Looks great! But,,, did you get your chores done before playing? lol
Mathing-out the S35D overlap puts them that deep? I'll get a cam and rockers out to yo today. If it goes 64x53, It can run a Lifan rod with 14mm pin Wiseco, and you can cut 3mm from the deck if needed. 66x51, same deal, 100mmx13 rod and a 3mm slice, or 97 and no cut. Or, since you know the number to JE... What about cutting the bore size up in to the chamber and moving the ring pack down a bit? I'd hate to add crevice volume, but putting piston above deck is no fuzz. 67x49.5 plays ok, if that Tak can have it's pin hole opened, or use a Lifan 107 crank. Kurlon has broke a couple, but with crank-mount clutch.

lol that horrible chores got done first i bet your ears were on fire by the end of the night. well about that.....i kinda boned ya. i forgot we decided on useing a 35 cam and i never mathed it out so i went off the specs i came up with for a huge lift cam. i was rushing to get as much done as i could cause it seems sundays is my only day for playing and i had to lash and do maintence on a drz400 and a kawsaki 450f, had to wrestle with a garbage china inner rotor, cut these horrible rockers someone sent me before i could play. so it wasnt til i was pressing the intake seat in and flipping getting it ****eyed a lil having to cut the seat out ruining my counter bore that i stopped and went chit! those are deep we are using a 35 cam terrys not going to be happy about this. its going to need a big ole piston so i can open up the valves to keep from shrouding so a 66 is going to be a better route.

 

[storminnorman07]

did a little more tinkering tonight figured id post some pics

exhaust seat in progress

intake seat almost done

finished intake seat

counter bores done

valves sitting in counter bores

exhaust seat pressed in

 

[storminnorman07]

hows this make you feel terry? skinned her 3mm for the 66x51 set up. i guess on a upside if you ever wanted to put REALLY big valve you could do 37 x 30 and still run a S35 cam lol. next question do you want a hemisperhical chamber or bath tub for more cr?

cut for bigger valve spring base washer

 

[The_GDFP]

It makes my jumblies tingly? lol. Looks great! I like the tub, being a big quench fan. We'll have to see how deep the notches get, before thinking of bigger valves. Maybe even re-grind a 25D for more lift, to keep the curve wide, if it ends up on the oval. Rough idea on chamber volume, yet?

 

[storminnorman07]

It makes my jumblies tingly? lol. Looks great! I like the tub, being a big quench fan. We'll have to see how deep the notches get, before thinking of bigger valves. Maybe even re-grind a 25D for more lift, to keep the curve wide, if it ends up on the oval. Rough idea on chamber volume, yet?

Not yet if o had to ballpark it id say between 10-12cc stock I believe is right around 12.5cc

 

[storminnorman07]

terry decided to change the valve sizes on ya....lol

 

[Minibiker05]

Jesus what is that out of a 11litre Cummins or something

 

[The_GDFP]

Perfect, as I've decided on a little bigger bore.

 

[storminnorman07]

Jesus what is that out of a 11litre Cummins or something

came out of a high strung small block. came acrossed them on ebay 16 lightly used ti valves for 60 ot 65 shipped i seen it as prime time valves to sacrifice to the pitbike gods. i have been hesitant to cut my own valves cause everytime i have i wasnt happy with the results and im pretty sure alot of it was just tooling. a lil while back i picked up a tool post grinder and have been dying to try it out and i finally found my test subjects *evil scientist laugh*. i figure if it works out like chit o well only 65 bucks lost if it works out ill have 16 ti valves i can start cramming in some pitbike heads. at roughly 4 bucks a valve vs the 120 or so for a ti kibble white blank i think its worth a shot ;-)

 

[storminnorman07]

Perfect, as I've decided on a little bigger bore.

lol dirty harry style

 

[Minibiker05]

Nice buy and its deff brings a new meaning to "MONSTER" head lol hope it all works would be good to see running and will sound sick man do U have a bed in ya shed coz i would if i had all that machiney id be making stuff all the time lol