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91oct + 100% meth = what octane rating

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Old Oct 1, 2010, 10:59 AM
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91oct + 100% meth = what octane rating

Hey guys I just have a question that I can't seem to find the answer to. I'm wondering what the octane rating will be ( approximately ) while running 91 and meth. I have read that meth is around 115 Oct and mixed with the 91 it will be around 100 or 105 Oct. Let me know what you think if my math is right or not. Thanks in advance!

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Old Oct 1, 2010, 11:07 AM
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How many nozzles, what size are they?
Old Oct 1, 2010, 11:16 AM
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I don't have the kit installed just yet so I'm still trying to research my set up. I was leaning towards a 1.0 about 8 inches from the TB and a .8 a little closer. but like I said the setup is still up in the air right now
Old Oct 1, 2010, 02:02 PM
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Originally Posted by kreionic
How many nozzles, what size are they?
You got the right idea. You need the flow rate and number of nozzle to calculate the flow volume against the amount of 93 octane.
Old Oct 1, 2010, 04:33 PM
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Alright that makes some sense to me. I will be running 91 with 950cc injectors and then the meth on top of it all. I'll do some more checking to see if I should run the dual injection or just a single. Right now I'm running the stock turbo but I plan on getting a ported BBK or perhaps the new HKS but I haven't decided. Is anyone out there running a similar setup that's willing to learn me some stuff LOL? Any info would be appreciated, thanks and be safe over the weekend!

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Old Oct 4, 2010, 02:09 AM
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Don't run a single nozzle, run dual nozzle setup.
Old Oct 4, 2010, 11:37 AM
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I got a question for you guys, how are your nozzels hooked up? did you yeld a bung to your ICP or did you drill and tap it in?
Old Oct 5, 2010, 01:58 PM
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Better yet where are you locations? I've seen before IC and after IC, 4 inches from TB , 12inches from TB, all sorts of setups. Does it matter or is it all personal taste as to where you put them? Let me know what you guys think!
Old Oct 10, 2010, 07:09 PM
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Anyone? No input on this?
Old Oct 10, 2010, 07:41 PM
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Put one about 6 inchces from the TB and another down below your clutch slave cylinder. I ran a 1.0 and a .9 and it worked great (Aquamist HFS-1 ) like this with great results. Resulting octane? IDK, 103-ish?
Old Oct 10, 2010, 07:43 PM
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What turbo are you running and what injectors? might want to consider dual .6's for a lot of setups, dual .8's for stock frame turbos. My setup was overkill on a BBK @30psi.

Last edited by scheides; Oct 10, 2010 at 07:46 PM.
Old Oct 10, 2010, 07:54 PM
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Right now I'm running the stock turbo, I have been looking at the ported BBK and the new HKS. I will be running 950cc injectors with gsc S1 cams but on the stock block
Old Oct 10, 2010, 08:57 PM
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Just do dual .6's for now then (if you are talking aquamist?) and then upgrade to .8's when you upgrade your turbo. *** that HKS turbo.

Why you should think twice before buying HKS products
Old Oct 11, 2010, 09:01 AM
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I will be running the HSF-6 system and will be putting everything in together including the new turbo when I figure out which one to get.
Old Oct 29, 2010, 12:55 PM
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Ok here's the plan, FP Green, 950cc injectors running a dual nozzle set up ( from what im estimating a 1.0 and a 0.9 ) running around 27 or 28 PSI. The way I calculated it out was as follows, 950cc x 4 = 3800cc, I want to run 100% meth so 20-25% of fuel flow = (20% = 760cc ) ( 25%= 950cc ) plus the 10% system loss, so 1045cc , So after doing all the math and looking at the charts ( Thank you to Howerton Engineering !!) I come up with a 1.0mm and a 0.9mm injecting 1041cc. Does all this sound right or am I just way off? Let me know what you guys think


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