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vertical_edge_800
MMT Pro Member
Joined: Thu Dec 30, 2010 5:48 am
Posts: 274
Location: Palmer, Alaska
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 compression ratio Has anybody here figured what the compression ratio with iron mountain heads is? And what it is with bps rods and pistons?
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| Sat May 19, 2012 11:06 pm |
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Dirtracer4
MMT Member
Joined: Mon Nov 07, 2011 10:35 pm
Posts: 23
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Re: compression ratio I just put one together with IM heads, PVT rods, & milled stock pistons. 205 - 215
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| Sat Jun 23, 2012 9:17 am |
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cb5331
MMT Super Elite Member
Joined: Fri Dec 18, 2009 8:10 pm
Posts: 16915
Location: Rowlett, TX
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Re: compression ratio ^ that isn't a ratio
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| Sat Jun 23, 2012 9:28 am |
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schmitt
MMT 1000 Club
Joined: Fri Jun 25, 2010 3:33 pm
Posts: 1177
Location: WI
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Re: compression ratio I have 160 psi with iron mountain heads, bps cam with stock pistons and rod's. If that helps at all
_________________
1848 DeadFowl pushed by a Stage 4 Delta powered MB HDR (JBP dusting)
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| Sat Jun 23, 2012 9:54 am |
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vertical_edge_800
MMT Pro Member
Joined: Thu Dec 30, 2010 5:48 am
Posts: 274
Location: Palmer, Alaska
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Re: compression ratio i was looking for a ratio, like 10:1 for example..
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| Sat Jun 23, 2012 10:01 am |
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Marsh Runner
MMT Pro Member
Joined: Thu Oct 15, 2009 10:38 am
Posts: 87
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Re: compression ratio Tulip cut valve?
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| Sat Jun 23, 2012 5:37 pm |
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vertical_edge_800
MMT Pro Member
Joined: Thu Dec 30, 2010 5:48 am
Posts: 274
Location: Palmer, Alaska
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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.
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| Sat Jun 23, 2012 10:37 pm |
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50fps
MMT 1000 Club
Joined: Tue Jan 13, 2009 6:42 pm
Posts: 2377
Location: West Coast Wisconsin
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Re: compression ratio
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| Sun Jun 24, 2012 8:09 am |
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50fps
MMT 1000 Club
Joined: Tue Jan 13, 2009 6:42 pm
Posts: 2377
Location: West Coast Wisconsin
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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.
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| Mon Jun 25, 2012 6:32 am |
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craig
MMT Elite Member
Joined: Tue Jan 13, 2009 7:53 pm
Posts: 7515
Location: Chauvin
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compression ratio
_________________
1750 GatorTail Extreme/Stage 3 37 GTR HD
Procrastination is a lot like masturbation. Sure it sounds great at the time but, in the end your only f--k--g yourself.
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| Mon Jun 25, 2012 10:16 am |
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50fps
MMT 1000 Club
Joined: Tue Jan 13, 2009 6:42 pm
Posts: 2377
Location: West Coast Wisconsin
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Re: compression ratio
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| Tue Jun 26, 2012 7:48 am |
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vertical_edge_800
MMT Pro Member
Joined: Thu Dec 30, 2010 5:48 am
Posts: 274
Location: Palmer, Alaska
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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
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| Tue Jun 26, 2012 8:08 am |
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craig
MMT Elite Member
Joined: Tue Jan 13, 2009 7:53 pm
Posts: 7515
Location: Chauvin
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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.
_________________
1750 GatorTail Extreme/Stage 3 37 GTR HD
Procrastination is a lot like masturbation. Sure it sounds great at the time but, in the end your only f--k--g yourself.
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| Tue Jun 26, 2012 8:13 am |
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bubba777
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Re: compression ratio Make sure your pistons weight the same 
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| Tue Jun 26, 2012 11:19 am |
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odass
MMT 1000 Club
Joined: Tue Aug 02, 2011 5:30 pm
Posts: 1928
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Re: compression ratio Hey Cody you should post this on mb website.lol  bet that would last about 2 seconds.
_________________
Dead Fowl Custom 1954hd with a GTR
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| Sun Jul 22, 2012 10:39 pm |
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MALLARDSX2
MMT F.E.
Joined: Wed Jan 28, 2009 6:34 pm
Posts: 978
Location: GA
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Re: compression ratio Oh boy
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| Mon Jul 23, 2012 6:08 am |
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take'emgator
MMT Super Elite Member
Joined: Mon Oct 19, 2009 6:38 pm
Posts: 10201
Location: SETX
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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.
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| Mon Jul 23, 2012 6:18 am |
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craig
MMT Elite Member
Joined: Tue Jan 13, 2009 7:53 pm
Posts: 7515
Location: Chauvin
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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.
_________________
1750 GatorTail Extreme/Stage 3 37 GTR HD
Procrastination is a lot like masturbation. Sure it sounds great at the time but, in the end your only f--k--g yourself.
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| Mon Jul 23, 2012 7:14 am |
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odass
MMT 1000 Club
Joined: Tue Aug 02, 2011 5:30 pm
Posts: 1928
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Re: compression ratio To much is too much
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Dead Fowl Custom 1954hd with a GTR
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| Mon Jul 23, 2012 7:32 am |
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craig
MMT Elite Member
Joined: Tue Jan 13, 2009 7:53 pm
Posts: 7515
Location: Chauvin
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Re: compression ratio
_________________
1750 GatorTail Extreme/Stage 3 37 GTR HD
Procrastination is a lot like masturbation. Sure it sounds great at the time but, in the end your only f--k--g yourself.
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| Mon Jul 23, 2012 7:49 am |
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Team Camo
MMT Sponsor
Joined: Thu Oct 01, 2009 4:49 pm
Posts: 8536
Location: Bridge City, TX
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Re: compression ratio
_________________
1846 GTB & 35 GTR
Team Gator-Tail
Killer Kallz & ANGLE PORT dealer
(409) 720-8949
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| Mon Jul 23, 2012 8:17 am |
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Will
MMT Elite Member
Joined: Fri Jul 08, 2011 1:54 pm
Posts: 8133
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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?
_________________
Before the internet, the majority of the village idiots stayed in their villages.
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| Wed Jul 25, 2012 11:22 am |
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