parish8

iTrader: (6)

i need to tune the truck without meth using pump gas and a vp fuel of some kind. localy i can get c16 and have always thought that was the best fuel out there.

the set up on race fuel is 408, afr heads, twin gts 70's, decent air to water intercooler. going to push it to 20psi or so and over 1000rwhp on a dynojet.

here are some quotes i am geting. is this the consensus? should i go with c12 even though it is just 108 octane?

""""don't run C16 in a turbo car with an intercooler, period.


you'll lose a shitload of power. Trust me, I've tried it a lot out here. You should be running something like C12 or 114 for your combo. The C16 requires super hot IAT's like blown454 says - it's meant specifically for roots-blown engines that run 200 degree F and higher intake air temps. And it slows them down too.

A lot of import "racers" and other people will try to tell you otherwise, but hours of dyno testing has shown me it's not meant for the kind of combo you are running. """"

SSinisterSS

There have been times where i have seen cars make less power on too high of octane. but with 20psi you may or may not need it. it really just depends on how good your w/a intercooler really is. If it does keep you IAT's low then i would stay with the 112 or 114 tops.

Street Tuna

Any tuner that has any ability at all is going to make loads more power on C16 than pump gas in any turbocharged application....disagreeing with this one is out there with the urban myths that 'Speed Density tuning doesnt work if you live in a high altitude'.

If a tuning shop tells you either of those, the solution is simple....take your money and run far, far away

parish8

iTrader: (6)

something to remember c12 is only 108 octane.

parish8

iTrader: (6)

not comparing c16 to pump gas. comparing it to other vp race fuels. will c16 be down on power compared to c12(only 108 octane). other important question is do i need a better fuel than c12 to run what i want to run(~1000-1100rwhp). i want to be on the "very safe side"

mahhddgtp

He's basically asking C16 vs C12 (not pump)

Street Tuna

This was the bit that caught my eye

TS6

iTrader: (41)

Turbo guys have been running C16 for years. Whoever says you shouldn't run it on a turbo car period needs removed from the gene pool.

onfire

iTrader: (17)

Sunoco tech told me to try the 110 leaded first. It's heavier than C16 and has less lead to kill the wideband.

onfire

iTrader: (17)

Property
Standard
Leaded
Supreme
Leaded
MO2X
HCR Plus
Maximal Leaded


More Information
More Information
More Information
More Information
More Information

Specific Gravity
0.728
0.715
0.717
0.739
0.708

Antiknock Index (R+M)/2
110
112
112
114
116

RON, Research Octane
115
114
115
118
118

MON, Motor Octane
105
110
109
110
114

Reid Vapor Pressure
5.6
6.3
9.8
6.0
5.9

Distillation, ºF






Initial Boiling Point
100
98
92
102
103

10% Evaporation
179
170
122
181
170

50% Evaporation
222
219
208
217
217

90% Evaporation
248
232
229
226
232

Final Boiling Point
369
257
251
245
257

Leaded
Yes
Yes
Yes
Yes
Yes

Color
Purple
Blue
Green
Orange
Red

Oxygen, Wt.%
0.0%
0.0%
2.7%
0.0%
0.0%

Dielectric Constant
-0.1
-0.7
6.9
0.6
-0.9

Ed @ Late Model Speed

iTrader: (4)

@ Onfire!!! more info than you ever wanted to know about fuel!

Ed

black98ws6ta

iTrader: (77)

That right there answers your own question....you MAY NOT need c16 for the octane alone.....and it may make less power compared a lower octane......... BUT WITH LESS OF A SAFETY MARGIN.

NA$TY-TA

iTrader: (21)

I agree.....

Ive been running Torco latley and i run the 118 octain stuff..... might not need it over the 116 but id rather be safe then sorry....

KP would have some good insight on this since i know he runs less then c16..... if im not mistaken i believe he runs 110..... no meth either...

Kyle

Slowhawk

iTrader: (12)

C-16 is not better than the lower grades for boost?
****,I better switch out the gas in our race cars that run 11-1 comp. and 26lbs of boost

just messing with ya. C-16 works very well and we use int in alot of cars with very good results.

BLWN1

iTrader: (6)

I can get a VP reps number if you want to drill him.. Hes a good guy, with a fast car....

chuntington101

C-16 is a good fuel, but form what i have heard, this new VP import race fuel is the nuts! think the octane is over 120! also they recon it will make 5% more power than any other nonoxygenatted fuel.

thanks Chris.

Pro Stock John

iTrader: (34)

VI Import costs more too right, $11 vs. $9?

Quik

iTrader: (7)

i thought you already made 1011rwhp/1080rwtq?

parish8

iTrader: (6)

it made 1055rwhp and something like 1100tq on some cheap philips 114.

it is a long story but i need to tune it with a vp fuel and make is as absolutly safe as i can.

most people i am talking to say it will be down on power with the c16 but i have a ton of turbo. wont i be able to toss an extra psi or so at it and be right where i was but probably still be safer because the c16 is kick *** stuff?

Ponyhntr

iTrader: (9)

All of our Drag Radial, SSO, and Pro racers run C16. They all see less than 80* of IAT, have approximately 9:1 compression, and all run 25+ (some up to 50) psi of boost. These cars run 8-teens all the way to mid 6's.

You'll be fine with C16.