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compression ratio
http://mudmotortalk.com/mmt_v2/viewtopic.php?f=3&t=29332		 Page 1 of 1
Author:  vertical_edge_800 [ Sat May 19, 2012 11:06 pm ]
Post subject:  compression ratio
Has anybody here figured what the compression ratio with iron mountain heads is? And what it is with bps rods and pistons?
Author:  Dirtracer4 [ Sat Jun 23, 2012 9:17 am ]
Post subject:  Re: compression ratio
I just put one together with IM heads, PVT rods, & milled stock pistons. 205 - 215
Author:  cb5331 [ Sat Jun 23, 2012 9:28 am ]
Post subject:  Re: compression ratio
^ that isn't a ratio
Author:  schmitt [ Sat Jun 23, 2012 9:54 am ]
Post subject:  Re: compression ratio
I have 160 psi with iron mountain heads, bps cam with stock pistons and rod's. If that helps at all
Author:  vertical_edge_800 [ Sat Jun 23, 2012 10:01 am ]
Post subject:  Re: compression ratio
i was looking for a ratio, like 10:1 for example..
Author:  Marsh Runner [ Sat Jun 23, 2012 5:37 pm ]
Post subject:  Re: compression ratio
Tulip cut valve?
Author:  vertical_edge_800 [ Sat Jun 23, 2012 10:37 pm ]
Post subject:  Re: compression ratio
I suppose for a guess 10:1 wasn't too far off lol... thanks thats exactly what I was looking for, needed it to troubleshoot fuel problems.
Author:  50fps [ Sun Jun 24, 2012 8:09 am ]
Post subject:  Re: compression ratio
Author:  50fps [ Mon Jun 25, 2012 6:32 am ]
Post subject:  Re: compression ratio
Thanks. A handful of us were running heads decked that much and some with a little more with stock internals and a cam with decent results a few years back.
Author:  craig [ Mon Jun 25, 2012 10:16 am ]
Post subject:  compression ratio
Author:  50fps [ Tue Jun 26, 2012 7:48 am ]
Post subject:  Re: compression ratio
Author:  vertical_edge_800 [ Tue Jun 26, 2012 8:08 am ]
Post subject:  Re: compression ratio
Well that's a good reason it wouldn't cooperate! I'm a little iffy about the reliability of a 10.9, some of my runs put me out in the middle of nowhere 50+ miles from nearest boat launch
Author:  craig [ Tue Jun 26, 2012 8:13 am ]
Post subject:  compression ratio
50hp, what would the compression ratio be of an engine using the billet pistons and rods that Al sells (0 deck height), with heads decked .020?

That's what my last build consisted of.

Although it went fast fast, it didn't last last.
Author:  bubba777 [ Tue Jun 26, 2012 11:19 am ]
Post subject:  Re: compression ratio
Make sure your pistons weight the same :-)
Author:  odass [ Sun Jul 22, 2012 10:39 pm ]
Post subject:  Re: compression ratio
Hey Cody you should post this on mb website.lol :lol: bet that would last about 2 seconds.
Author:  MALLARDSX2 [ Mon Jul 23, 2012 6:08 am ]
Post subject:  Re: compression ratio
Oh boy
Author:  take'emgator [ Mon Jul 23, 2012 6:18 am ]
Post subject:  Re: compression ratio
THey still wouldn't understand even if posted over there, can't help someone that doesn't want to listen to reason.
Author:  craig [ Mon Jul 23, 2012 7:14 am ]
Post subject:  Re: compression ratio
My last engine had compression numbers like that.

It ran great with the EVT intake but when using the BPS, AV gas was needed to prevent detonation....which is what ultimately led to it's demise.
Author:  odass [ Mon Jul 23, 2012 7:32 am ]
Post subject:  Re: compression ratio
To much is too much
Author:  craig [ Mon Jul 23, 2012 7:49 am ]
Post subject:  Re: compression ratio
Author:  Team Camo [ Mon Jul 23, 2012 8:17 am ]
Post subject:  Re: compression ratio
Author:  Will [ Wed Jul 25, 2012 11:22 am ]
Post subject:  Re: compression ratio
I've seen where many say 200 psi and above is really too much but these production motors are running 240 psi?

I looked up MB and they are at 4,300 feet, does that have anything to do with the higher psi? Are they not counting for the increased pressure difference from there to practically sea level?
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