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hey all... I have a 93 T04S turbo that I've tuned myself to just over 400 rwhp at 14 PSI....
I've run the car up as high as 15 or maybe even 15.5 PSI many times on 93 pump gas with no problems at all. Here's my question... assuming my fuel system can do it, do you guys think I'm pretty safe going to 18 PSI on a mix of 20% Xylene and 80% 94 octane? That should be right around 98-99 octane. Obviously I've got the wideband and stuff and I'd also be putting in a 3 bar MAP sensor before starting this little project.... So.... 18 PSI on Xylene/Gas mix possible? 20 PSI??? Thanks! Brian P.S. Anyone reading this with "only" 300 rwhp... DON'T upgrade! It becomes more and more addictive and you're never happy https://www.nopistons.com/forums/pub...IR#>/smile.png |
Dude I ran 18psi on pump 93 for a few years and 25k miles, another 10k were put on by the second owner before it blew.
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https://www.nopistons.com/forums/pub...#>/biggrin.png yes you could run that. I've got a friend running 18 psi (low boost) on 91 pump gas.
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Originally Posted by 94touring' date='Mar 30 2004, 11:16 AM
Dude I ran 18psi on pump 93 for a few years and 25k miles, another 10k were put on by the second owner before it blew.
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I wouldn't do it. Theres not enough of a safety margin. The most I run on 93 octane without water injection is 16 psi. Its just not worth the cost and hassel or replacing the motor for a few more horsepower.
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My friend runs 20 on pump. I'm not sure what his timing is like.
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on a rotary?
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19 psi and 95 octane with W/I(aquamist 1S) and still going strong. Still needs more loving...er...tuning.
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I agree, check out the water injection for the safety margin, although the pump says it is 93 octane, it does not mean you got a quality product. Also gasoline as it sits will drop in octane. My uncle hauled gasoline for years, the Sunoco Ultra 94 comes out of the plant @ 108-111 Octane, but with it being mixed with the gas in the tanks that has been sitting, you are getting an average minimum of 94. If you have a few extra bucks, have a private company check the pumps you frequent, some of you might be surprised how high the acctual rating is on the gasoline you are pumping in your cars, the octane rating on the pump is the minimum the gasoline has to be be to meet state testing. My uncle said he had delivered a few loads to the stations and their high octane tanks were not low enough for the full load, and the managers just had them dump the excess into the lower octane tanks. This is something to think about the next time you go to the pumps...
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Originally Posted by TheCamel' date='Apr 1 2004, 10:43 AM
I agree, check out the water injection for the safety margin, although the pump says it is 93 octane, it does not mean you got a quality product. Also gasoline as it sits will drop in octane. My uncle hauled gasoline for years, the Sunoco Ultra 94 comes out of the plant @ 108-111 Octane, but with it being mixed with the gas in the tanks that has been sitting, you are getting an average minimum of 94. If you have a few extra bucks, have a private company check the pumps you frequent, some of you might be surprised how high the acctual rating is on the gasoline you are pumping in your cars, the octane rating on the pump is the minimum the gasoline has to be be to meet state testing. My uncle said he had delivered a few loads to the stations and their high octane tanks were not low enough for the full load, and the managers just had them dump the excess into the lower octane tanks. This is something to think about the next time you go to the pumps...
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Woah!
Crazy stuff, Camel! |
Originally Posted by TheCamel' date='Apr 1 2004, 03:43 PM
I agree, check out the water injection for the safety margin, although the pump says it is 93 octane, it does not mean you got a quality product. Also gasoline as it sits will drop in octane. My uncle hauled gasoline for years, the Sunoco Ultra 94 comes out of the plant @ 108-111 Octane, but with it being mixed with the gas in the tanks that has been sitting, you are getting an average minimum of 94. If you have a few extra bucks, have a private company check the pumps you frequent, some of you might be surprised how high the acctual rating is on the gasoline you are pumping in your cars, the octane rating on the pump is the minimum the gasoline has to be be to meet state testing. My uncle said he had delivered a few loads to the stations and their high octane tanks were not low enough for the full load, and the managers just had them dump the excess into the lower octane tanks. This is something to think about the next time you go to the pumps...
STEPHEN |
Originally Posted by TheCamel' date='Apr 1 2004, 07:43 AM
I agree, check out the water injection for the safety margin, although the pump says it is 93 octane, it does not mean you got a quality product. Also gasoline as it sits will drop in octane. My uncle hauled gasoline for years, the Sunoco Ultra 94 comes out of the plant @ 108-111 Octane, but with it being mixed with the gas in the tanks that has been sitting, you are getting an average minimum of 94. If you have a few extra bucks, have a private company check the pumps you frequent, some of you might be surprised how high the acctual rating is on the gasoline you are pumping in your cars, the octane rating on the pump is the minimum the gasoline has to be be to meet state testing. My uncle said he had delivered a few loads to the stations and their high octane tanks were not low enough for the full load, and the managers just had them dump the excess into the lower octane tanks. This is something to think about the next time you go to the pumps...
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An easier thing to do would be to talk to the station manger, or if you get the chance, the driver, they will tell you the same thing, the stickers on the pumps are the state minimum to carry that label.
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18 psi on pump (93-94 ocatne) all day long......
timing and A/Fs in the 10.8- 11.0 is the key https://www.nopistons.com/forums/pub...#>/biggrin.png No race gas......the reason why my FJO wideband is still running awesome after one year..... |
Originally Posted by Boostn7' date='Apr 2 2004, 10:05 PM
18 psi on pump (93-94 ocatne) all day long......
timing and A/Fs in the 10.8- 11.0 is the key https://www.nopistons.com/forums/pub...#>/biggrin.png No race gas......the reason why my FJO wideband is still running awesome after one year..... |
In the words of Corky Bell "water injection makes up for poor tuning".
If you don't know who Corky Bell is maybe you shouldn't have a turbo in your car. |
Originally Posted by Boostn7' date='Apr 2 2004, 10:05 PM
18 psi on pump (93-94 ocatne) all day long......
timing and A/Fs in the 10.8- 11.0 is the key https://www.nopistons.com/forums/pub...#>/biggrin.png No race gas......the reason why my FJO wideband is still running awesome after one year..... An Aquamist setup might not be a bad idea though. |
This is from an email I received from a friend of mine:
"I am running 20psi, but that is because I lowered the compression ratio of the motor. Boost pressure is really meaningless unless you are holding constant intake charge temps, spark plug heat ranges, ignition timing (and how precise the ECU controls it) and the compression ratio of the engine the boost is going into. In my case I have a huge intercooler, a turbo that is efficient in that range, colder-than-stock plugs and the most advanced ignition controller available on the market. Further, 20psi in my engine is the equivalent of 18psi in a 9.0:1 engine. 18psi in a stock motor isn't really that big of a deal as long as the other concerns are dealt with. Best, John" |
Re: 18 Psi On Pump?
you can go up to 20 psi on 93 but after that your going to start getting into c116.
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