both are specifically made for N/A motors as opposed to C16, anyone have experience with either?

Specs:
C19
• Motor Octane: about 116
• Specific Gravity: .695 at 60° F

C14+
• Motor Octane: about 115
• Specific gravity: .696 at 60° F

C16
• Motor Octane: 117
• Specific gravity: .735 at 60° F

Leaded

 

I have experienced VP C19. It is a poor replica of the old 76 Prostock 118: same colour, similar reid, somewhat close burn characteristics.

I worked for me for a small portion of last season. I then switched to Rockett Brand 118: a formulation by the engineers from Unocal 76.

These individuals started up their own company when Conoco Phillips aquired 76, and dissolved the racing fuel division.

I experienced a modest power gain with the Rockett fuel, in comparison to the C19. The c19, however proved superior to the c16.

 

Bisi, you mentioned the Rockett Brand fuel in another post...where can we find it?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by CompressionFed &raquo;</TD></TR><TR><TD CLASS="quote">Bisi, you mentioned the Rockett Brand fuel in another post...where can we find it?</TD></TR></TABLE>

 

We've already signed on with VP to stock the C16, C19, Methanol and the MS109 for the local racers.

I'm willing to try the Rocket fuel if the cost to get some here wont be too much. We'll see after the first couple races if there is a gain in popularity with the Rockett Brand Racing Fuel.

Bisi got us into using the C19 stuff last year. Its perfect for the all motor cars that run over 13:1 compression.
The only thing is, not all places are carrying them and are special order only. We stocked about 12-5gal cans the last few races and it went pretty quick. Didnt know alot of people used them.

 

We've already signed on with VP to stock the C16, C19, Methanol and the MS109 for the local racers.&gt;&gt;&gt;

Question, (sorry, a little OT) - are most people running VP or other name brand Methanol? If so, is there any difference or just that they think it is better. I am sure the fuel companies mark the price up a lot compared to regular chemical companies.

 

you know we didnt research extensively on other methanol choices. the reason being is that everyone asks for VP.
and you know how we want to stick with the ssame fuel we've used to dyno and tune the cars. Hard to change between runs at the track or in between tuning.

 

I would highly recomend the C14+ as an economical race fuel for high RPM small displacement N/A engines. If you are willing to spend a little more, use C25. C14+ has pretty good power #'s compared to most any other fuel. C25 is the NHRA Pro-Stock class spec fuel. It should be good for ~2% more HP than C14+. If you must use a "gas", but are looking for the most power available, ask for C44. It's extremely pricey, and short lived (storage), but it's good for an additional 2-3% hp. over C25.

Think of it this way. NHRA Pro-Stock engines run between ~7000 and 10,000RPM and make roughly 2.75 hp per cu.in. (170hp/L). Many of the teams were doing their own blends of fuel in the late '90s, but for the most part they all seemed to be very similar to C44. NHRA changed to a spec fuel to keep the suposed cheating in check. That's when things went toward C25. Now the bikes also run C25, and they are making over 3.7 hp/cu.in. (227hp./L) while running between ~9000 and 13,500RPM.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by CompressionFed &raquo;</TD></TR><TR><TD CLASS="quote">Bisi, you mentioned the Rockett Brand fuel in another post...where can we find it?</TD></TR></TABLE>

http://www.rockettbrand.com