660 compression rates - Yamaha Rhino Forums - Yamaha UTV Forum

Yamaha Rhino Forums - Yamaha UTV Forum


660 compression rates


This is a discussion on 660 compression rates within the Yamaha Rhino Performance Discussions forums, part of the The Garage category; what kind of difference will a 11:1 or 12:1 piston make over a 10:1? is it enough to justify having
Go Back   Yamaha Rhino Forums - Yamaha UTV Forum > The Garage > Yamaha Rhino Performance Discussions


Yamaha Rhino Performance Discussions Yamaha Rhino performance discussions.
Engine mods, CDI boxes, exhausts, etc.

Reply
 
LinkBack Thread Tools Display Modes
Old 08-08-2009, 09:07 PM   #1 (permalink)
Pr3m1um M3mb3r
 
predu's Avatar
 
Default 660 compression rates

what kind of difference will a 11:1 or 12:1 piston make over a 10:1?

is it enough to justify having to run race gas?

with my current cdi i will need race gas for anything over 10:1

a new programable cdi isn't in the budget right now


also who can or where can i get the best price on a cp piston ( you can pm me for this)
__________________
I'm stayin neutral here, but you DID report kyle's post to admins.
that might work at rf, but not here, not even if johnny asked me to remove
kyle's post would I do it.that is on principal alone.
predu is offline   Reply With Quote
Sponsored Links
Advertisement
 
Old 08-09-2009, 10:36 AM   #2 (permalink)
Wide F'n Open
 
007rhino's Avatar
 
Default

What CDI are you running? Also check the Wellers for your pistion can't remember what I paid for mine but it was a really fair price.
__________________
07 686 Built By Weller Racing\Dynatech ignition\Bronco clutch\HCR spindels\UTV Crap bed delete\PRP seats\
007rhino is offline   Reply With Quote
Old 08-09-2009, 12:23 PM   #3 (permalink)
Pr3m1um M3mb3r
 
predu's Avatar
 
Default

just a plug and play procom


weller is at the top of the prices i have found
__________________
I'm stayin neutral here, but you DID report kyle's post to admins.
that might work at rf, but not here, not even if johnny asked me to remove
kyle's post would I do it.that is on principal alone.
predu is offline   Reply With Quote
Old 08-09-2009, 02:01 PM   #4 (permalink)
Wide F'n Open
 
warlock's Avatar
 
Default

For starters I would recomend a new cdi first since those procoms are junk. to many issues with them.
__________________
2nd place is the first loser!!

Were a whole lot faster than you think you are.
warlock is offline   Reply With Quote
Old 08-09-2009, 02:24 PM   #5 (permalink)
Pr3m1um M3mb3r
 
predu's Avatar
 
Default

yeah i am not sure what my old rhino had for a cdi it was +4 i believe and at 11:1 it pinged

i just picked up a mpi cdi which i believe is a procom for my new rhino
__________________
I'm stayin neutral here, but you DID report kyle's post to admins.
that might work at rf, but not here, not even if johnny asked me to remove
kyle's post would I do it.that is on principal alone.
predu is offline   Reply With Quote
Old 08-09-2009, 02:33 PM   #6 (permalink)
Wide F'n Open
 
warlock's Avatar
 
Default

Procomms cdi suck so i would find something else.
__________________
2nd place is the first loser!!

Were a whole lot faster than you think you are.
warlock is offline   Reply With Quote
Old 08-09-2009, 03:37 PM   #7 (permalink)
Wide F'n Open
 
007rhino's Avatar
 
Default

Go with a Dyna no pinging with mine, as far as the piston goes good luck on the search
__________________
07 686 Built By Weller Racing\Dynatech ignition\Bronco clutch\HCR spindels\UTV Crap bed delete\PRP seats\
007rhino is offline   Reply With Quote
Old 08-10-2009, 10:39 AM   #8 (permalink)
Wide F'n Open
 
Default

You want a +2 Max CDI for the 11:1 Piston. There are a few out there. One for sure is the Hunterworks. I cant remember who the other one is. Maybe Moose? (custom tuned Dynatek model).

I would shy away from Procomm too. I would wait to do the piston until you can get a suitable CDI to go with it, and then I would go with the 11:1 unless you are racing. I use a 11:1 CP with +0 timing and 91. No detonation.
Wild Earp is offline   Reply With Quote
Sponsored Links
Advertisement
 
Reply

Bookmarks

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On



All times are GMT -6. The time now is 02:00 PM.



Powered by vBulletin ®
Copyright © 2000 - 2014, Jelsoft Enterprises Ltd.
Search Engine Friendly URLs by vBSEO 3.6.0
Garage Plus vBulletin Plugins by Drive Thru Online, Inc.