Originally Posted by gansei
Is the crackshaft black coated?
-> yes.. But now.. only coating in crankshaft head by GR Racing
and.. the crankcase is os 5port crankcase (OS coated)[/QUOTE
awsome wrk. did you drove other engines from Gr. can you advise me another work from him. acctually ill try one of them. but dont now which is better? and cant understand from korean website! Im owner from
os speed specII. and nova 353. I was planning to buy another.
yes i used other egines from GR.
Rex 3/5port, novarrossi NSR 5, LS3 etc on..
But i did not try novarossi Plus, 353..
and i quess OS engine had more modified effect than novarrosi.
( this is my quess
OS normal 100% power -> GR modified 150% power
novarrosi normal 100% power -> GR modified 130% power.)
i showed RRR with os speed specII in last weekend.
But RRR did not catch me in top speed... (i used GR OS 12TZ 3port)