Will 93 octane be ok for Stage 2 5.3's (11:1 CR).
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Will 93 octane be ok for Stage 2 5.3's (11:1 CR).
I am going to be getting a set of stage 2 heads from Absolute Speed. They are 5.3's and I was wondering if 93 octane would be ok?
If not let me know please.
If it is ok... what kind of gas do you guys like Mobil, Chevron, Sonoco...
If not let me know please.
If it is ok... what kind of gas do you guys like Mobil, Chevron, Sonoco...
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Re: Will 93 octane be ok for Stage 2 5.3's (11:1 CR).
I've always run Amoco, Mobil or Shell 93 and will continue to do so with my 5.3's. My H/C package should be running in less than a week.
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Re: Will 93 octane be ok for Stage 2 5.3's (11:1 CR).
You should be ok, i run 11.2 to 1 with my own reworked #241 castings(5.7) with no problems. I have Slowhawk's Edit tuning, and i run 94 Sunoco Ultra, but i have also ran Mobil 93 with no knock issues.
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Re: Will 93 octane be ok for Stage 2 5.3's (11:1 CR).
93 here and doing fine. Its all in the tune and just the gas in your area. I have one edit file with a little more timing to help driveabilty around down and I got slight ping in the 1500-2500 range but that was only after I put city gas in my car. not sure if the gas there was bad or not. Im running 29-30degrees of timing at WOT with no issues though
some gas just sucks though cause its water and crap in it
some gas just sucks though cause its water and crap in it
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Re: Will 93 octane be ok for Stage 2 5.3's (11:1 CR).
I am out here in central Florida, and it was 97 degrees yesterday, and I think 130,000 % humidity!!
so 93 should be ok... or it will definitely be ok.
We have Chevron, Mobil, Amoco, all the major playas in the gas industry.
Hope everything works out.
Also... about 8 months ago a Sunoco was put in... does every station have the 94 stuff... and how is there 93 octane (do they have that?)
so 93 should be ok... or it will definitely be ok.
We have Chevron, Mobil, Amoco, all the major playas in the gas industry.
Hope everything works out.
Also... about 8 months ago a Sunoco was put in... does every station have the 94 stuff... and how is there 93 octane (do they have that?)
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Re: Will 93 octane be ok for Stage 2 5.3's (11:1 CR).
ok..i'm running the 5.3's and F1 cam...no tuning. I'm closer to the 11.5 mark and on really hot days with the ac running it will ping a bit on the interstate. 93 octane here and no major problems here. I think with tuning you would be fine...its all in the timing.
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Re: Will 93 octane be ok for Stage 2 5.3's (11:1 CR).
A lot of it depends on what cam you are running. Bigger cams typically allow more compression.
Or is it that since it is a bigger cam (will be 230/236 .592/.605 112 lsa) It will allow me to run 93 will less worries?
#13
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Re: Will 93 octane be ok for Stage 2 5.3's (11:1 CR).
A lot of it depends on what cam you are running. Bigger cams typically allow more compression.
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Re: Will 93 octane be ok for Stage 2 5.3's (11:1 CR).
it really depends on a lot of things...timing, duration, lobe separation, and overlap of the valves. Its really hard to predict predetenation in an engine. I said it once and will say it again...its all in the timing...and a little a/f ratio's. If you can use LS1 edit you have the ability to keep it from pinging, but you have to remember that by removing timing you will sacrafice a little hp. Usually not more than a few. you can also adjust the a/f ratio's..just richen it up a bit....So in retrospect everyone here is right in some way. The best thing to do it pick the cam you like and tune it. It will run without pinging on pump gas!
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Re: Will 93 octane be ok for Stage 2 5.3's (11:1 CR).
Have 11 to 1 with 5.3 heads, run 93 all the time. Car's never shown more than .1 degree of KR. Should work fine with a decent cam. 11 to 1 with a stock cam might not work too well. My car would ping with the stock cam & stock heads at high rpm.