Which octane

What octane race gas should you run on a 12.6:1 engine?

Knowing that you have to run _________ race gas for the 12.6:1 engine what would be the max CR for that fuel?

I couldn't tell ya which gas..................alky would work though..............

I was just thinking of alky. Only down fall is if I wanted to make a run to the local Sonic. Besides that I would be all for it.

jones wrote:I was just thinking of alky. Only down fall is if I wanted to make a run to the local Sonic. Besides that I would be all for it.

Get a large enough cell for the trip... you will be using it for fuel, not sippin it.

I have driven both of my cars around town on meth, makes um cry when you pull through the Sonic. Have a big cell if you gotta go very far................leanmout valve of sorts help.


The kid with the 383 Chevy street truck is coming over this weekend, gonna throw my brothers old 800 alky carb on it and take it fore a spin.......................


Come to the darkside..................

What is this leanout valve you have mentioned in a post or 2?

jones wrote:What octane race gas should you run on a 12.6:1 engine?

Knowing that you have to run _________ race gas for the 12.6:1 engine what would be the max CR for that fuel?

VP-110 or C12 is what I would use. If you decide to run the spray, I would probably use C16. As you can tell I am a VP Fuels user.
The VP-110 would be the cheapest but C12 is the most common fuel used in NHRA sportsman from what I have seen. I think the VP-110 is good to the 13:1 range and the C12 is good all the way to about 15:1. We were told by a couple of familiar nitrous gurus to run C16 with our nitrous program, which we did. Our motor was 14.5:1 and it sounded meaner with C16 over C12 but I never dynoed it after the switch.

richter69 wrote:I have driven both of my cars around town on meth, makes um cry when you pull through the Sonic. Have a big cell if you gotta go very far................leanmout valve of sorts help.


The kid with the 383 Chevy street truck is coming over this weekend, gonna throw my brothers old 800 alky carb on it and take it fore a spin.......................


Come to the darkside..................

I have 15gaL fuel cell that I could use to supply a secondary 5gal tank mounted up front. What is my options if i want look int alky? We have used a fly toilet before, but nothint this big!

whatbumper wrote:

jones wrote:What octane race gas should you run on a 12.6:1 engine?

Knowing that you have to run _________ race gas for the 12.6:1 engine what would be the max CR for that fuel?

VP-110 or C12 is what I would use. If you decide to run the spray, I would probably use C16. As you can tell I am a VP Fuels user.
The VP-110 would be the cheapest but C12 is the most common fuel used in NHRA sportsman from what I have seen. I think the VP-110 is good to the 13:1 range and the C12 is good all the way to about 15:1. We were told by a couple of familiar nitrous gurus to run C16 with our nitrous program, which we did. Our motor was 14.5:1 and it sounded meaner with C16 over C12 but I never dynoed it after the switch.

Could you give me an estimate about how much eash 50gal drum would cost?

i like vp fuels myself but dang they are proud of that stuff. a drum of c-12 is around 550 and c-16 is 700ish. i can get renegade 110 and 112 it think it is around 400 and 450 a drum.

Can get sunoco 110 in louisville for 300.00 a drum.

yea you can get that sunoco cheap but it's not really a good fuel in my opinion. most of the time when something is cheap their is a reason

Last year I paid 315.00 for renegade 112, I',m joining my hero Richter on the dark side this year.

What do ya'll pay for alky?

130.00 a drum, your cell is big enough, use an electric pump and a good carb..............don't even try the injection stuff on the street.

If I go alky would I need to get a larger fuel pump and run larger lines than -8? How are you suppose to size your fuel system for alky? Much different than gas?

I had a magnafuel prostar 500 and the big regulator, kid aint paid for it yet so it could still be for sale lol.

-12 from cell to pump (just used a swivel coupler) -10 from pump to reg, -8 from reg to carb. You can a carb converted if you already have one, the 1050 dommy makes an excellent size.

richter69 wrote:I had a magnafuel prostar 500 and the big regulator, kid aint paid for it yet so it could still be for sale lol.

-12 from cell to pump (just used a swivel coupler) -10 from pump to reg, -8 from reg to carb. You can a carb converted if you already have one, the 1050 dommy makes an excellent size.

Largest carb I have right now is a 850dp, Looking into a Phillips suggestion for race gas 1150 or 1250 dominator or one of those SV1 carbs setup for alky from Patrick. What are you going mechanical? I wish that new TF intake would hurry up and come out. I have to buy a carb and have that money set aside.

went injection

richter69 wrote:went injection

what type of setup? How many runs you get out of a drum of alky?

Jones, get you set-up running on gas first. The 110 vp or sunoco supreme is fine. Stop screwing around or you'll never get it running.........

dfree383 wrote:Jones, get you set-up running on gas first. The 110 vp or sunoco supreme is fine. Stop screwing around or you'll never get it running.........

But I enjoy Screwing!!

Hey, Jones why not Split The Difference and use E-85

Just being the Devil's Advocate.

I am thinking of running e85 on a bracket car. the only problem is that it is not easy to find around a lot of tracks I go to which means that I would have to carry it with me which is not a big deal.

whatbumper wrote:I am thinking of running e85 on a bracket car. the only problem is that it is not easy to find around a lot of tracks I go to which means that I would have to carry it with me which is not a big deal.

I agree, there is only one place local that sales the stuff. I would just assume pay for race gas or alky than that big headache. Its a hard choice,,,,, race gas or alky