Lower Octane Fuel

njk53 · 01-23-2014, 09:33 AM

Is the C9 VP Leaded or Unleaded?

Greg Reimer 7376 · 01-23-2014, 09:58 AM

We have a couple of '68 Chevelles with the 327/250-245 horse engine. that engine,even after decking the block and the heads and arriving at a comfortable chamber size, is an actual 8.5 c/r. It runs fine on 91 octane 76 union right from the pump. No real difference in Et or MPH is obvious from C-12. It probably shouldn't do this according to conventional wisdom, but Tony Janes did this when bracket racing the car. I always hunted down C-12 when I went out, but there's apparantly no need for 108 octane fuel in an 8:1 engine. Problem is, the 76 wouldn't pass fuel check, so when Pomona comes, out it goes and the good stuff has to go in. I don't think we would try this with the 275 horse engine.

7423 · 01-23-2014, 10:42 AM

My car @ 9.1 CR is .05 faster on Arco 91 pump gas then on the legal fuels VP C10 or Rockett 111. I believe that well over half of the stockers would run just fine on pump gas at $4.00 a gallon instead of the rip off prices we are forced to swallow for the $13.00 and up per gallon fuel on the "accepted" list. But I guess thats politics...............

Signman · 01-23-2014, 11:18 AM

VP C-9 is 97 octane Unleaded with NO Oxygenates.
As close as you can get to pump gas with NHRA approved fuel from VP.
It is cheaper (around $65 with the can) is all gasoline not as caustic as other VP Fuels.

Keep in mind it is unleaded, if using older heads without hardened valve seats you will have issues.

B Parker · 01-23-2014, 12:39 PM

I use C-9 all the time. My car likes it better than the rest of VP's fuel. I have had my fastest pass with it. Just have to tune it a little. BP

Pistol Pete · 01-23-2014, 01:14 PM

Quote:

Originally Posted by B Parker

I use C-9 all the time. My car likes it better than the rest of VP's fuel. I have had my fastest pass with it. Just have to tune it a little. BP

Yeah but Barry, what are you going to put in there for the Attempted Record Run Come April, C-25 ???? lol

FINESPLINE · 01-23-2014, 01:54 PM

Interesting article on running the the right octane fuel by Dan Dvorak.
Go to.........Dvorak Machine / Tech / tech articles/ what about fuel. This article is far from new but only reinforces what is being spoken about today.

gbur · 01-23-2014, 08:18 PM

Tried VP 100 unleaded while bracket racing . Car does not like it at all . Best bet is find the pump gas that your combo likes. Can't run anything but from the pump in pure stock anyhow

pro stock chuck · 01-30-2014, 02:25 PM

who's Parker and what kind of frying pan is he using and what is he cooking in it.
now on fuel I was on the dyno this week and here is the test results. I made 8 pulls on union 76 pre. and got a good base line and then I went over to c-11 much to my surprise their was no gain over the pump gas or loss. so put that in your parker pan and smoke it!!!!!!!!!!!! dyno test 69 chev 255/280 9.0cr engine. Chuck

01-23-2014, 09:33 AM	#1
njk53 Senior Member Join Date: Jul 2007 Location: East China, MI Posts: 504 Likes: 0 Liked 0 Times in 0 Posts	Re: Lower Octane Fuel Is the C9 VP Leaded or Unleaded? __________________ Nelson Kowal Stock 345

01-23-2014, 09:58 AM	#2
Greg Reimer 7376 VIP Member Join Date: Nov 2008 Location: Glendora,Calif. Posts: 1,137 Likes: 172 Liked 717 Times in 220 Posts	Re: Lower Octane Fuel We have a couple of '68 Chevelles with the 327/250-245 horse engine. that engine,even after decking the block and the heads and arriving at a comfortable chamber size, is an actual 8.5 c/r. It runs fine on 91 octane 76 union right from the pump. No real difference in Et or MPH is obvious from C-12. It probably shouldn't do this according to conventional wisdom, but Tony Janes did this when bracket racing the car. I always hunted down C-12 when I went out, but there's apparantly no need for 108 octane fuel in an 8:1 engine. Problem is, the 76 wouldn't pass fuel check, so when Pomona comes, out it goes and the good stuff has to go in. I don't think we would try this with the 275 horse engine.

01-23-2014, 10:42 AM	#3
7423 Senior Member Join Date: Dec 2006 Posts: 639 Likes: 0 Liked 1 Time in 1 Post	Re: Lower Octane Fuel My car @ 9.1 CR is .05 faster on Arco 91 pump gas then on the legal fuels VP C10 or Rockett 111. I believe that well over half of the stockers would run just fine on pump gas at $4.00 a gallon instead of the rip off prices we are forced to swallow for the $13.00 and up per gallon fuel on the "accepted" list. But I guess thats politics...............

01-23-2014, 11:18 AM	#4
Signman Senior Member Join Date: Oct 2003 Location: Lower Slower Delaware Posts: 535 Likes: 22 Liked 269 Times in 99 Posts	Re: Lower Octane Fuel VP C-9 is 97 octane Unleaded with NO Oxygenates. As close as you can get to pump gas with NHRA approved fuel from VP. It is cheaper (around $65 with the can) is all gasoline not as caustic as other VP Fuels. Keep in mind it is unleaded, if using older heads without hardened valve seats you will have issues. __________________ Frank Ferrucci I/SA 1271 "Be Thankful for the Gifts You are Given"

01-23-2014, 12:39 PM	#5
B Parker Senior Member Join Date: Sep 2009 Posts: 849 Likes: 980 Liked 2,336 Times in 464 Posts	Re: Lower Octane Fuel I use C-9 all the time. My car likes it better than the rest of VP's fuel. I have had my fastest pass with it. Just have to tune it a little. BP

01-23-2014, 01:54 PM	#7
FINESPLINE Senior Member Join Date: Apr 2010 Location: Island of high taxes, N.Y. Posts: 541 Likes: 0 Liked 1 Time in 1 Post	Re: Lower Octane Fuel Interesting article on running the the right octane fuel by Dan Dvorak. Go to.........Dvorak Machine / Tech / tech articles/ what about fuel. This article is far from new but only reinforces what is being spoken about today. Last edited by FINESPLINE; 01-23-2014 at 02:02 PM.

01-23-2014, 08:18 PM	#8
gbur Member Join Date: May 2013 Location: Spotsylvania,Va Posts: 354 Likes: 0 Liked 1 Time in 1 Post	Re: Lower Octane Fuel Tried VP 100 unleaded while bracket racing . Car does not like it at all . Best bet is find the pump gas that your combo likes. Can't run anything but from the pump in pure stock anyhow

01-30-2014, 02:25 PM	#9
pro stock chuck Member Join Date: Dec 2007 Location: Huntington Beach Ca. Posts: 164 Likes: 21 Liked 53 Times in 17 Posts	Re: Lower Octane Fuel who's Parker and what kind of frying pan is he using and what is he cooking in it. now on fuel I was on the dyno this week and here is the test results. I made 8 pulls on union 76 pre. and got a good base line and then I went over to c-11 much to my surprise their was no gain over the pump gas or loss. so put that in your parker pan and smoke it!!!!!!!!!!!! dyno test 69 chev 255/280 9.0cr engine. Chuck