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dunemashingismyspieclty
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753 Posts
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2005 4.8 sierra with manual tranny 2wd


















(AIRAID)



shortys (Edelbrock)




(Gibson)




LS2 CAM & COMPCAM SPRINGS





(Magnacharger)








BOOSTED UP FROM 5 TO 8





532WHP




another impressive FI 4.8

tuned on 95 octane

 

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GMFS Member
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4,390 Posts
nice numbers.

i remember like 10 years ago you could get 98 octane at a Sunoco by me.
 

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Sonoco carries 100 octane at some select stations around the bay area. Luckily one of those happens to be 2.3 miles from my house :)
stupid question but,what is the difference on a stock engine?
 

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Of course it's easy to get good gas for cheap in the middle-east...

Thanks OPEC! :biggun: Best I can do is get 94 octane at Sunoco.

Impressive truck though, either way.
 

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Sonoco carries 100 octane at some select stations around the bay area. Luckily one of those happens to be 2.3 miles from my house :)
Yea but its probable expensive as hell. Leaded 110 is $6/gal here.

stupid question but,what is the difference on a stock engine?
Nothing.

wonder what this setup would run horsepower wise on 87 octane
Theyd probably have to pulley back up to lower the boost and then youd have to take osme timing out of it. I bet you would lose quite a bit of poer going to 87. For the price difference from 87 to 91 its retarded to run 87.
 

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It's about $3.83/gal here for 94 and thats the highest I've seen. 87 is $3.28/gal
 
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