9.25 compression to high? - Ford Mustang Forums : Corral.net Mustang Forum
 
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post #1 of 13 Old 06-13-2011, 02:08 PM Thread Starter
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9.25 compression to high?

Just wondering if this compression is to high in my 302? Car is boosted. What's the highest boost level can I go?

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post #2 of 13 Old 06-13-2011, 02:29 PM
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that is fine.

are u running intercooler though?

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post #3 of 13 Old 06-13-2011, 02:38 PM
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it will depend on the tune up.. should be plenty fine.. i plan on making mine 9.5 to 1 and run pump gas with a meth kit..

89 Hatch 6.65 @ 106...
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post #4 of 13 Old 06-13-2011, 03:51 PM Thread Starter
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Yes I have an intercooler. How much boost can I run with it

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post #5 of 13 Old 06-13-2011, 08:43 PM
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boost number doesnt really matter, every setup is diff.. what kind of power do u wana make??

89 Hatch 6.65 @ 106...
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post #6 of 13 Old 06-13-2011, 09:06 PM
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Too many variables. More comp, more boost, good gas.

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9.986 @ 136.84
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post #7 of 13 Old 06-13-2011, 09:48 PM
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I've ran 9:4 1 on 18lbs on my last motor and it was fine, 93 pump gas 306.

351w I have now has about the same compression
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post #8 of 13 Old 06-14-2011, 04:42 PM
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c/r is fine for most boosted street app's

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post #9 of 13 Old 06-15-2011, 11:19 PM
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c/r is fine for most boosted street app's
X2, mine is 9.3:1 pump gas and meth 15 psi and 22* timing

88' Coupe
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post #10 of 13 Old 06-30-2011, 11:16 PM
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More compression makes more power. Like the guys said, watch it with pump gas...

My motor gave us a big smiley face when we gave it more compression...

If running race gas you can go higher then 9.25 safely. The things some of the 275 owners do with motors scares me....


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post #11 of 13 Old 07-05-2011, 09:20 AM
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Go e85 u won't be mad.


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post #12 of 13 Old 07-05-2011, 04:54 PM
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i run 9.5:1 with iron heads, 12#'s and pump gas. no problems so far.

93 lx, stock block, windsor jr. heads, custom cam, track heat , 75mm tb, hellion turbo kit (62-1), abaco 85mm, PMS IV, 3:27's, t5

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post #13 of 13 Old 07-06-2011, 05:31 AM
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old motor was 9.8-1 with #15 lbs of boost on 93 made 567rwhp

new motor is 8.5-1 with #30 lbs of boost on E85. no idea find out friday for hp

if you have a good tuner youll be fine. make sure you have good fuel pump/pumps
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