Hey Guys,,So who has made or seen some big HP dyno numbers just on pump gas,93/91 octane only, no meth > even with the big dog mods?
I think it would really take alot more tuning/building skills to get the most from pump fuel because of the limits of it..

 

Define "Big"

650+ wheel torque?

Personally, I don't think it's worth pushing the limits of 91 or 93. I run 100 octane, that's it. Then again, my car isn't a daily driver.

The 7.50/gallon price is worth the added insurance. I won't risk an additional 20-30-40-50hp on an inconsistent and crappy fuel.

 

[quoteOTE OTE=dhahlen;3746004]Define "Big"
650+ wheel torque?
Personally, I don't think it's worth pushing the limits of 91 or 93. I run 100 octane, that's it. Then again, my car isn't a daily driver.

The 7.5on price is worth the added insurance. I won't risk an additional 20-30-40-50hp on an inconsistent and crappy fuel.[/quote]

Good question, I really don't know but I would ask if the big turbos are making a lot more on pump then the common
16 billets or 18gs..

 

running high octane is only good if you can get it. its simply not available around me even though i live near a large city. e85 isnt close either and keeping 55 gal drum of race fuel just isnt practical. so 93 is my limit. i would love to know you can get 650 rwhp on 93 safely

 

Any reasonable tuner is going to err on the side of caution on a 91/93 tune. They may be able to squeak an extra 5% of power out of their tune, but at what cost?

Let's not talk about practicality, lol. A 1500hp car isn't practical, but hey, they doesn't stop everyone. Practical is relative. When I need gas I usually carry two 5 gallon drums and make the 60 mile round trip commute on the weekend or wait until the week day and make about a 30 mile commute to a closer location (not open on weekends).

Methanol seems to be what a lot of people do, but I've never been a fan. I would use it for the cooling properties, but never as a substitute for fuel.

I made 500ftlbs on 91 octane, with an off the shelf tune, pulling timing. When I moved to 100 octane, I went to 563ftlbs, no timing is being pulled.

While you may not see a 55gal drum being practical, I see it as insurance. You could also mix 50/50 with MS109 which would give you 101 octane or do VP100 with 93 and come out at 96.5 octane.

I am not a fan of mixing either, but I'm no expert. I just have my own experience from the dozen or so tuner cars I've owned and dealt with. I don't take a chance on fuel anymore.

Unfortunately high octane is not readily available, but you may consider picking up a couple of drums if you have the space for it. That way while you're waiting for a refill on one drum, you can use another.

My plan is to have EvoMS do a reflash for both a 91 and 100 octane tune. This way I can travel with the car and carry my fuel with me. Drain the tank and enjoy the spirited driving, and then swap back to 91 for the trip home. While its added insurance, it's still expensive at $7.50/g.

 

We all know higher octane is more power and safer.....That is not the issue here..Its getting the most from only running pump gas.
Has anyone seen or dynoed there big turbo car on just pump gas file?
Is it worth going to bigger turbos over Billets/18s just to run on a pump gas file?
I guess IF anyone has made 650+HP/TQ on a rear wheel,600+ on AWD, that is excellent..No matter what size turbo on 93 oct. but is there anyone here that knows or has?

 

al of this assumes race gas is reasonable and close. as i said nobody within 100 miles of me carries any kind of unleaded race gas. so that means i have to have it shipped in. last quote for 103 race fuel was 12$ per gal and 12$ per gal to ship in minimun 5 gal container. thats 120$ per container 24$ per gal!!!! simply unreasonable. closest race track is 2 hrs away so i have to carry fuel and have the ability to drain fuel and retune for any kind if race file.
its just to much work to have a high octane car in the nashville area. so 93 is were i am at. would like to see a 24/18 or alpha 28 with all the supporting mods running 93 oct and what type of SAFE rwhp/ torque it will run

btw as you store race fuel it degrades as time goes by . approx 1o oct points per week i believe. so 55 gals on a weekender car would not be running the best fuel octane all the time

 

Sorry to say but it does not degrade that fast IF it is in a Sealed, Metal container out of the Sun/Heat...
I use to buy 55 gal. drums for my race bikesIi know I have taken 6 months to use it because I mixed it,,,actually made more power with a mix..lol. ...

 

do a nice meth setup with failsafes

i have been using E85 for the past year and 93/meth the year before that and meth is a bit more practical but still not just like a straight pump car

 

Chris at USP Motorsports did my build. On his dyno it made about 615 HP/TQ on 93. Dyno on a hot august day in south florida. Car is driven most days....tires don't seem to last quite as long as before the build.

 

Nice,,,I bet has a nice power curve with those turbos..
I am suprised others didnt talk you in to going catless...lol..

 

615 wheel power??

 

615 rwhp.

 

I thought about it but decided to go with 100cell cats.
Chris has very nice exhaust that he developed and
Sound great.

 

Great numbers on 93!!!

What your max boost??

I m planing to go from K24 to FP HTA3071or 76 & 1,25-1,35bar,we use 100oct pump gas (94-95oct us spec) in Athens.