robert0762 Posted May 19, 2009 Report Posted May 19, 2009 421 Cub set up 1. Are the cub cylinders nikasil? 2. What are they set up for as far as the port timing ? 3. Can you put an MX port job on them? 4. If so how will they perform? Quote
blowit Posted May 19, 2009 Report Posted May 19, 2009 421 Cub set up 1. Are the cub cylinders nikasil? 2. What are they set up for as far as the port timing ? 3. Can you put an MX port job on them? 4. If so how will they perform? 1. Y 2. HOT. near drag timing 3. No, unless you do a BUNCH of work like chopping them off and tricking up the head to work with them. Quote
robert0762 Posted May 19, 2009 Author Report Posted May 19, 2009 (edited) 1. Y 2. HOT. near drag timing 3. No, unless you do a BUNCH of work like chopping them off and tricking up the head to work with them. I dont want to go with a nikasil cyl because of the price of a rebuild. I think its much more economical to to able to bore over 3 or 4 times for 200 per build instaed of replate for 450 and up Edited May 19, 2009 by robert0762 Quote
robert0762 Posted May 19, 2009 Author Report Posted May 19, 2009 1. Y 2. HOT. near drag timing 3. No, unless you do a BUNCH of work like chopping them off and tricking up the head to work with them. What if you bought them for a stock stroke and ran a 4 mil that would bring the timing down right? Quote
blowit Posted May 19, 2009 Report Posted May 19, 2009 What if you bought them for a stock stroke and ran a 4 mil that would bring the timing down right? No. Actually the ports that count will advance. Quote
robert0762 Posted May 19, 2009 Author Report Posted May 19, 2009 No. Actually the ports that count will advance ????????? Please explain Quote
FireHead Posted May 19, 2009 Report Posted May 19, 2009 I dont want to go with a nikasil cyl because of the price of a rebuild. I think its much more economical to to able to bore over 3 or 4 times for 200 per build instaed of replate for 450 and up Technically speaking, you should not ever have to bore a nikasil cylinder. All you have to do at rebuild time is replace the pistons. Quote
blowit Posted May 19, 2009 Report Posted May 19, 2009 No. Actually the ports that count will advance ????????? Please explain Rod angle changes with stroke changes. Quote
blowit Posted May 19, 2009 Report Posted May 19, 2009 Technically speaking, you should not ever have to bore a nikasil cylinder. All you have to do at rebuild time is replace the pistons. :thumbsup: What he said. Nikasil uses Carbide as the hard plate and Nickel as the bonding agent. Um, Carbide is HARD. Much harder than ductile iron. B Quote
robert0762 Posted May 19, 2009 Author Report Posted May 19, 2009 (edited) Technically speaking, you should not ever have to bore a nikasil cylinder. All you have to do at rebuild time is replace the pistons. I know you cant bore it. But ewhen its worn you have to replate. Or does it last that long were its actualy worth the trade off. I do know its supposed to transfer heat better and is slicker Edited May 19, 2009 by robert0762 Quote
blowit Posted May 19, 2009 Report Posted May 19, 2009 I know you cant bore it. But ewhen its worn you have to replate. Or does it last that long were its actualy worth the trade off. I do know its supposed to transfer heat better and is slicker The coating is naturally "wetting" or "olifolic" (spelling here firehead), I can never remember the word. Anyway, it naturally absorbs and retains oils so it requires less aggressive honing thus less wear on the rings and pistons. Yes, it transfers heat better, can be built up to repair small problems or honed and bores out to another size and replated. As long as you treat it right, plating can last many (10-20) yrs of service. Brandon Quote
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