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10.37 compression on pump gas

  • Thread starter Thread starter 93stang burden
  • Start date Start date Feb 21, 2011

93stang burden

Member
Dec 2, 2008
82
0
6
Fort Bragg, NC
Feb 21, 2011
#1
  • Feb 21, 2011
  • #1
can you run 93 octane on 10.30's compression ratio without pinging??
 

tannerc91gt

This last 25% is foreign territory at this point
Founding Member
Nov 29, 1999
4,392
2,967
234
Indiana
Feb 21, 2011
#2
  • Feb 21, 2011
  • #2
what heads?
 

gt40_2003wes

I did sound a wee bit gay there.
Aug 14, 2005
461
2
48
ky
Feb 21, 2011
#3
  • Feb 21, 2011
  • #3
yes as long as u don't try to go crazy with the timing.
 

LarsD

Founding Member
Jul 2, 2002
2,680
119
123
Texas
Feb 22, 2011
#4
  • Feb 22, 2011
  • #4
I was able to run 89 octane with gt40P heads pushing almost 10:1 compression. With the right chamber and aluminum heads I don't see why not.
 

Wildstringer

New Member
Feb 20, 2011
65
0
0
Feb 22, 2011
#5
  • Feb 22, 2011
  • #5
there's always E85. I haven't done alot of research on what needs to be done to run it.
 

85_SS_302_Coupe

it sucks (I know) to be on the receiving end
15 Year Member
Nov 11, 2003
6,945
1,598
223
Northern KY
Feb 22, 2011
#6
  • Feb 22, 2011
  • #6
With reasonable timing, yes. There are lots of 11:1-11.5:1 cars running pump gas. It's all in the tune.
 
9

90stang5speed

Member
Jan 19, 2009
582
2
19
Columbus Ga
Feb 22, 2011
#7
  • Feb 22, 2011
  • #7
You need to tune for E85. Its stoic ratio is around 9.something instead of 14.7 like gas so you will also need bigger injectors
 

tmoss

Gettin Wired
Founding Member
Jun 28, 2001
7,153
32
128
Saint Louis, MO
Feb 23, 2011
#8
  • Feb 23, 2011
  • #8
dynamic compression ratio (determined by the cam intake valve closing event) should be looked at - could be a non-issue.
 
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