Turbo, Port/polish and bore? - Honda RC51 Forum : RC51 Motorcycle Forums
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post #1 of 31 (permalink) Old 08-31-2009, 11:12 PM Thread Starter
 
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Turbo, Port/polish and bore?

Has anyone turboed, port and polish or bored out their RC?

Power gains for turbo?
Port/polish?
Bored?

Thanks!
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post #2 of 31 (permalink) Old 08-31-2009, 11:21 PM
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The cylinders are a composite ceramic, so if you bore them, you'll need to have them replated by companies that specialize in that, such as Millenium Technologies.

You can have the heads ported. Hord Power can do this.

Don't have any info on turbo'ing RC51's.
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post #3 of 31 (permalink) Old 09-01-2009, 12:17 PM
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Turbo power gains I don't know but you can you tube it and there are a couple out there.

Port/Polish will get you 5-10 hp from the dyno sheets I've seen. Hord is excellent when it comes to this.

Bore I couldn't tell you. Haven't heard of anyone doing that.
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post #4 of 31 (permalink) Old 03-10-2010, 02:13 PM
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Quote:
Originally Posted by SubSailor View Post
The cylinders are a composite ceramic, so if you bore them, you'll need to have them replated by companies that specialize in that, such as Millenium Technologies.

You can have the heads ported. Hord Power can do this.

Don't have any info on turbo'ing RC51's.
Sorry,but factory manual say`s the RC has two oversizes 0,010 and0,020 inch.How you can rebore ceramic coat.
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post #5 of 31 (permalink) Old 03-11-2010, 09:06 AM
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I wouldn't worry about port and polish if you're going to turbo. Is there power to be made if you do? Of course it'll have a LITTLE more power, but the cost isn't worth the benefit as the RC51 heads flow fantastic in the first place (Plus I doubt the difference in spool will be notable if you properly size the turbo). Same thing goes with increasing your cylinder size, it will yield you a little more power and a little better spool but not enough to where I'd go out of the way to do it. I've already turboed plenty of applications and the good setups are always the simple ones.
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post #6 of 31 (permalink) Old 03-11-2010, 12:17 PM
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exactly what aircooled said.. p/p or using oversized pistons arent cost effective and overkill if your planning a turbo application..
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post #7 of 31 (permalink) Old 03-11-2010, 12:49 PM
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Search youtube... there are a few vids from a guy who turboed his RC51. Maybe you can hit him up for some advice, and his results.
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post #8 of 31 (permalink) Old 03-11-2010, 12:54 PM
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overbore

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Originally Posted by franz125 View Post
Sorry,but factory manual say`s the RC has two oversizes 0,010 and0,020 inch.How you can rebore ceramic coat.
i own a 1200cc rc51 engine, with 180HP, i havenīt made it myself, got it from japan
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post #9 of 31 (permalink) Old 03-11-2010, 04:21 PM
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i own a 1200cc rc51 engine, with 180HP, i havenīt made it myself, got it from japan
I'm going to have to ask if you can provide a little more info on this.
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post #10 of 31 (permalink) Old 03-12-2010, 02:54 AM
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info

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Originally Posted by Aircooled View Post
I'm going to have to ask if you can provide a little more info on this.

what more info do you need?? i think thats all you need to know, especially when thinking of your previusly posts, i think thatīs all the info i want to share with you, i just wanted to point out that a big bore is possible

cheers

IV
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