Slight Variation Rockcrawler Option 2

[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!

[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.

[pielet97]

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

[SilverXJ]

I cc'd mine and got 57.3 after a polish job.

[gradon]

If you don't measure the cc's, be safe and assume they are 57cc instead of 58cc.

[SilverXJ]

x2 I would go with 57 as mine were 57.3 AFTER polishing.

[pielet97]

x2 I would go with 57 as mine were 57.3 AFTER polishing.

Thanks, so.... should this run on 87 octane?

[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

[gradon]

Are you positive you can get 65cc out of the CC?

[Cherokee Chief]

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?

[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.