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Slight Variation Rockcrawler Option 2

Posted: February 11th, 2010, 8:07 am
by pielet97
This is what I'm thinking. I'm trying to run on 87 octane and have ~260hp and ~325tq.

Any opinions or recommendations are welcome!

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Re: Slight Variation Rockcrawler Option 2

Posted: February 11th, 2010, 4:01 pm
by SilverXJ
With That DCR you might b able to. I have 8.29:1 and I have to run premium unless I run it rich at WOT.

Re: Slight Variation Rockcrawler Option 2

Posted: February 12th, 2010, 4:46 am
by pielet97
SilverXJ wrote:With That DCR you might b able to. I have 8.29:1 and I have to run premium unless I run it rich at WOT.

Thanks, this will be my first stroker and the learning curve is pretty steep.

Do all of my numbers look correct? I'm not sure about the 58cc?
Thanks

Re: Slight Variation Rockcrawler Option 2

Posted: February 12th, 2010, 5:47 am
by SilverXJ
I cc'd mine and got 57.3 after a polish job.

Re: Slight Variation Rockcrawler Option 2

Posted: February 12th, 2010, 6:52 am
by gradon
If you don't measure the cc's, be safe and assume they are 57cc instead of 58cc.

Re: Slight Variation Rockcrawler Option 2

Posted: February 12th, 2010, 10:09 am
by SilverXJ
x2 I would go with 57 as mine were 57.3 AFTER polishing.

Re: Slight Variation Rockcrawler Option 2

Posted: February 13th, 2010, 5:56 pm
by pielet97
SilverXJ wrote:x2 I would go with 57 as mine were 57.3 AFTER polishing.
Thanks, so.... should this run on 87 octane?

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Re: Slight Variation Rockcrawler Option 2

Posted: February 13th, 2010, 6:15 pm
by Cherokee Chief
I'm in the process of lowering my scr to 9.0. Its a 4.7l and I am using a deck clearance of .005 and changing my combustion chambers to 65cc, dishing my pistons to 18cc and using .051 head gasket. The cam is a comp 68-232-4 straight up. My quench will be .055 and it should be around 9.2 scr/ 7.93dcr

Re: Slight Variation Rockcrawler Option 2

Posted: February 13th, 2010, 6:19 pm
by gradon
Are you positive you can get 65cc out of the CC?

Re: Slight Variation Rockcrawler Option 2

Posted: February 13th, 2010, 6:24 pm
by Cherokee Chief
gradon wrote:Are you positive you can get 65cc out of the CC?
I slowly removed material from the back of the bowl and also around the front and a light polishing at the valves.
Why is this a wrong thing to do to the combustion chambers? This is my first stroker build, so if this won't work then why?

Re: Slight Variation Rockcrawler Option 2

Posted: February 15th, 2010, 3:25 pm
by gradon
I'm not saying you can't get 65cc out of it(idk), just when you do it, be consistent and take your time. Measure it afterwards with the valves in, some grease around the seams and on the head face, and then use a thicker square of plexi w/ a hole in it and a syringe to measure out the ccs.