I've been running 40% avgas w/ super for 16 psi boost, but wouldn't some VP C12 or C16 mix more ideal?



If it were available to me, I'd run some Sunoco 100 or other high-end, "street-legal" fuel. I'm trying to mix my own using only super unleaded w/ either racegas or avgas w/ oil.



I know about SG differences and I may be trying to mix something that won't stay mixed. I want the best octane range for best street performance w/o overdoing it and killing power potential.



Advice greatly appreciated https://www.nopistons.com/forums/pub...1047683894.gif

You can purchase 55 gallon drums of Sunoco and VP fuels.

i wonder what the demand is for fuel over 100 octane in a typical large city.

well theres a sunco around here that has it but its like 3.30 or something a gallon, im not exactly sure, but you cant directly pump it into your tank you have to put it in a contaior first.

Methanol.

Is anyone in this forum running a high-performance fuel or a mix? Are you running 20 psi on pump super? Me, Keith, Mick, Charlie, Ron, and Britney want to know.

i thought sunoco 100 was smog legal? or is it a real race gas?



just go find a local airport if you have no cat and don't mind changing oxygen sensors.



what is the difference compared to av gas then? not leaded?

Sunoco 100 in unleaded and is street-legal.

I have been using avgas. Gasolines have differing specific gravities causing them to possibly not stay mixed like when you mix gal. of low-lead avgas with 12 gal. of super unleaded for weekend playtime to safely run at high boosts of 16 psi and up.

Since I am not getting any replies to my question, I will do my own unscientific testing by mixing super-avgas, super-C12, and avgas-C12 in 1:1 ratios in glass jars. I'll post my observations.

Tyresmokins running Methanol, that's pretty high performance.

I'm running a street car. Methanol isn't practical for a street car. My street car is not set up for methanol. I would consider running Foster's ethanol. It smells and tastes like it could possibly yield some sort of power gain ......... that is if I can keep it well hidden from Keith.

Methanol. Q: Why the hell would methanol be brought up in this discussion when it isn't being considered? A: Girlie and TiredSmoke are effin' morons who post just to post and blabber b/c they have nothing else better to do. Sober up.

Now, let me see. What was the questian again. Oh, you ask if anyone was running any high performance fuel. Know let me see. Can any one tell me if Methanol is high performance Fuel. I thought it was, but hey I could be wrong. https://www.nopistons.com/forums/pub...1047683785.gif https://www.nopistons.com/forums/pub...1047683785.gif

Alright, TittySmoke, I guess I wasn't clear enough regarding my car and my fuel situation. https://www.nopistons.com/forums/pub...1047683561.gif Perhaps the moderator could put this thread out of its misery before Ho-bitch7 sees this and farts up something more stupid than what you just did. https://www.nopistons.com/forums/pub...IR#>/boink.gif

Why run anything but pump gas at 16psi? I ran 19psi on my 1/2 bridge on 89 octane with no water injection for 6 months. I have a friend that runs 30 psi on 96 octane pump gas with water injection(crazy fucker). Damn! I never thought I'd meet anyone more paranoid then me. ****! Dragon was running 23 psi on pump gas and water injection with the T70. Another car running 21 psi on 96 with no water injection. There is a lot to be said for good tuning.

Thanks, that's what I need to know. We're having Steve Kan coming here to New Orleans to do some street tuning to our PFCs and Haltechs and whatever else the guys are using. It apparently will involve 10 runs to 8000 RPM in 4th gear. I'd love to be able to get away w/ not having to sweeten the pot to utilize maximum turbo output unless I want to do that. https://www.nopistons.com/forums/pub...O_DIR#>/37.gif

You don't need anything over 100 oct. which is the highest oct raiting there is..Yes I know they have 110 and 115 ect but anything over 100 is a % over 100 examp 110 is 1% over or is it 10% can't really remember but it don't matter much when it applies to street cars we don't run enough static compression to need anymore than 100 even at 10-20 psi. and once you get much over 100 the fuels wont stay mixed very well or very long. and easy way to make higher oct. is to add toluliene (is that spelled right?) you can get that at a paint supply store. now the ratio is something you need to figure out. Reguardless the point once you go over a certain performance rating (which anything over 100 is rated at) you begin to lose ability to detonate it. Oh yes my point 100 oct. is fine.

I reccomend you ask Steve Kan what fuel you should use, since he is the one doing the tuning. I personally believe that you should only run the same gas you tuned the car to. I also believe in water injection.

Agreed. Run 1 kind of fuel and stick with it.



Running 100 all the time could get real expensive. I'm gonna agree with Igy. Run pump 93 octane with water injection. Thats my plan https://www.nopistons.com/forums/pub...DIR#>/wink.png

Yeah, the more octane the harder it is to burn. The highest pump octane here is Shell VPower at 94.



Back in May when my car was dyno'd to 16 psi and 402WHP, I was advised to run 40% avgas for a safety margin. This is on a 2mm stockport engine (3mm streetport will be going in sometime soon). I'll not worry too much more about it and let S.K. work his magic.



The attached fuel flow modification diagram is supposed to supply fuel to the secondaries more directly and readily than stock.



To the Australians - I regret being miffed at y'all and I apologize.

They wanted you to run 40% avgas at only 16 psi? DAMN

The only things I can think of is it was a very hot and humid day and they don't want to break customer cars on their dyno. They don't want customers breaking the engines weeks or months down the road. I can't say I blame them when they're faced with an array of cars in various condition. Although I can smugly say my engine bay was quite clean and tidy. I tried to make my car as hospitable as possible for the tuner.



I think the dynometer gets the car where it needs to be and then street-tuning hones the ECU even more.



I'm running 700 - 1200 injectors. Maybe I ain't got enough injector.



How much boost you running 93R1?

I'm still on twins brother. My 1/2 bridge T66-T70 project will be starting when I get back from Cancun in 2 weeks though https://www.nopistons.com/forums/pub...DIR#>/wink.png



I'll probably run 18-22 psi with water on the street.

I just did a crash course on water across both forums and that Mitsu dude's site (the guy that got the white EVO). I've known of water injection (used by AAF fighters in WWII and Hot Rod magazine). I'm not going to wig out on the fuel.