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Good thread i had used Quicksilver about 1 year no problem good price castrol i think is one of the best but high price a friend use TARCO racing oil since 2000 in the same engine big bore 6 monts ago he rebuilt it everything was new cylinders ,crank everything since then i use the same oil...

u r the man .... thanks

just wondering There are different hull ??? where is the different :wizard::wizard::wizard::wizard::wizard::wizard::wizard::wizard::wizard:

Thank you all for your informative replies. I kind of got the answer i needed. Even though i was not asking when do i need to change the head, but i was asking what is the reason that the cylinders crack. I believe that because you have more cases of cracked cylinder, it must be the different...

Originally Posted by iptamenos i think that noone understand i don't want to buy any head the matter is not me and if i will buy a gridle head the matter is when you really need a gridle head i have seen many 61x with nongridle heads no one never crack (different...

for your info i don't have a stock head i am using 8mm

i think that noone understand i don't want to buy any head the matter is not me and if i will buy a gridle head the matter is when you really need a gridle head i have seen many 61x with nongridle heads no one never crack (different setup's) the only head that you can find in the market...

??? how does it happend ??? post more info about this motors ? ignition ,head comp.

i have 6 girdled head install both my motors have gr head but also i have seen motors running for years since 1995 with head ,dry riva pipe and no cracks since today i have seen motor with 62t crankcase's , head 185 pci no gr ,61x riva cylinders dry pipe with msd working since 2001 since...

i see but i had never see 61x at 81mm cracks at any case i mean with pipe or a head or with porting ???

So 61x they want more attention than 62t . 61x 84mm with porting they will need girdled head but the 62t 84mm with same porting they will not

Wondering when cylinders crack in which cases is the porting? The bore size? The ignition ? The compression ? Is necessary the girdled head and if yes what bore size and after..... :Banane36::Banane36::Banane36::Banane36:

thanks for the parts was like u said ...:laugh2:

i send two messages one to his mail and one to this pwc account but never anwser ???

??? ,i delete some messages .

i will make a billet tatoo

what about the pricies ? of the hul's

sexy billet parts

i will thanks

bump