Compression test results

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Sep 9, 2017 | 08:47 AM

#11

Wide Open Cycles

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Joined: Mar 2016

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From: Fredericksburg, Virginia

Quote:

Originally Posted by prodrag1320

I'll look in my records & see where they where set right after the hurricane

Stay safe down there Kirby, glad you got the "duck" out of the pool and safely inside. Would be a shame to loose that.

Sep 11, 2017 | 12:48 PM

#12

robbyville

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From: Palm Desert,CA

Quote:

Originally Posted by 98hotrodfatboy

215 is a lot for the street and you should look at may be knocking your timing back a little bit cuz it's going to tend to get hot with that type of CCP...

Thanks again for this. So assuming I won't be opening up the engine again and it's cranking at 215 what does it mean that this is a lot for street, does it damage anything or just a rough ride of some type? Should I do the timing myself via my PV or is that something I should just mention to my tuner once I get there?

Sep 11, 2017 | 01:44 PM

#13

98hotrodfatboy

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From: Poolville

Your tuner should know... Last thing you want is detonation and high engine temps. Sure way to shorten the life expectancy of your motor... Might have to run it a little rich to help keep it on the cool side with timing held back a tad...

Sep 11, 2017 | 01:58 PM

#14

robbyville

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From: Palm Desert,CA

Quote:

Originally Posted by 98hotrodfatboy

Gotcha, I'll make sure to let him know

Sep 11, 2017 | 08:24 PM

#15

Max Headflow

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From: poway

I ran 220 psi in a 95 ci RK for 30K and had no problems.. I changed from H290s to TW55s not to lower the CCP but I got tired of replacing lifters every 10000 miles. Tuned right 215 is fine.. I also have a carbed 116 running 220 ccp at 11.3 on socal gas. Runs great but will likely need a crank in another 5000 to 10000 miles.

Sep 12, 2017 | 01:50 PM

#16

robbyville

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From: Palm Desert,CA

Awesome thanks as always guys! Spoke to my tuner yesterday, he starts to slow down in early October and wanted to wait until I had about 500 miles on the build, but he was cool with the compression as well. Since I went from a 103 to a 107 with new pistons and AC, but heads, cams, exhaust, are the same as when tuned last time, I'm hoping it won't have too many changes, albeit I love to watch the process.

Sep 16, 2017 | 04:22 AM

#17

Frédéric CM

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Joined: May 2014

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From: France

If CCP is really an issue, you can just buy a cam with a later closing * to bleed the comp down a little. Or maybe a thicker headgasket could do it if you want to tear the top end appart...

Sep 16, 2017 | 11:28 AM

#18

robbyville

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From: Palm Desert,CA

Quote:

Originally Posted by Frédéric CM

If CCP is really an issue, you can just buy a cam with a later closing * to bleed the comp down a little. Or maybe a thicker headgasket could do it if you want to tear the top end appart...

Yeah, I don't think it's an issue. Bike starts right up and rides absolutely beautifully. Even with the prior tune, no weird sounds, pops, pings. And to be fair, I have no idea what the difference is with low or high compression, it just struck me as odd that it was higher than what I see most people post.

At this point I've been in the engine so many times (since I do each project separately vs. an entire build all at once), that I'm done for a while... Unless of course I decide to not ship your new Throttle body and keep it for myself