• Mustang Forums
  • 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk-

Racing Fuel

  • Thread starter Thread starter tonykey1958
  • Start date Start date Jun 30, 2016
T

tonykey1958

New Member
Jun 30, 2016
1
0
1
Jun 30, 2016
#1
  • Jun 30, 2016
  • #1
I have a 408 stroker motor don't know what the internals are it ran good and I did a Trans swap while the car was down drain drain the gas and replaced it with 114 octane racing fuel and. Car. Runs bad is it to much octane thanks
 

CarMichael Angelo

my rearend will smell so minty fresh,
15 Year Member
Nov 29, 1999
10,641
8,909
234
Birmingham, al
Jul 1, 2016
#2
  • Jul 1, 2016
  • #2
Potentially. Depends on what you mean by "runs bad" If it's just not running as good performance wise as it did before on lower octane, then yeah,...you could look at that. Higher octane fuels burn slower and cooler than lesser octane does.
If the car is running poorly as in won't idle, coughs, hacks,...then that is a totally different story, and more than likely not necessarily fuel related.
Ask @84Ttop or @srtthis...these guys are racers, they use that $10.00 a gal stuff......they'd know.

Does this car still have it's cats?
 

jrichker

StangNet's favorite TOOL
In Remembrance. Thank you for your contributions
Mar 10, 2000
27,512
2,813
234
Dublin GA
Jul 1, 2016
#3
  • Jul 1, 2016
  • #3
Is the car a carb conversion or EFI?
 

A5literMan

At least it is lumpy...
5 Year Member
Jul 30, 2011
4,674
2,343
194
Illinois
Jul 1, 2016
#4
  • Jul 1, 2016
  • #4
What fuel were you running before? What timing? More octane means you can usually add more timing. More than likely this is the problem
 

84Ttop

They make new pistons every day, so why worry?
5 Year Member
Jul 2, 2009
5,222
3,254
204
South Jersey
Jul 1, 2016
#5
  • Jul 1, 2016
  • #5
Unless the car is more than 13:1 compression or seeing 20+ lbs of boost 114 octane fuel is way off base. Without knowing the specifics and I mean all of them about the combination of parts I wouldn't recommend anything...

FWIW @madmike1157 C16 is $14.50 a gallon now
 
Reactions: stykthyn

CarMichael Angelo

my rearend will smell so minty fresh,
15 Year Member
Nov 29, 1999
10,641
8,909
234
Birmingham, al
Jul 1, 2016
#6
  • Jul 1, 2016
  • #6
84Ttop said:
Unless the car is more than 13:1 compression or seeing 20+ lbs of boost 114 octane fuel is way off base. Without knowing the specifics and I mean all of them about the combination of parts I wouldn't recommend anything...

FWIW @madmike1157 C16 is $14.50 a gallon now
Click to expand...
You crazy.

Thanks for reminding me why I don't race anymore.
 
Reactions: 84Ttop

FoxMustangLvr

I love my Pimp
SN Certified Technician
Oct 14, 2012
4,968
3,514
204
Spokane, Wa
Jul 1, 2016
#7
  • Jul 1, 2016
  • #7
tonykey1958 said:
I have a 408 stroker motor don't know what the internals are it ran good and I did a Trans swap while the car was down drain drain the gas and replaced it with 114 octane racing fuel and. Car. Runs bad is it to much octane thanks
Click to expand...
what led you to believe that it needed race gas? Just because it's a 408 stroker doesn't mean it won't run on pump gas.
 

srtthis

the guy doing it does every local racers rear end
15 Year Member
Jul 3, 2009
5,129
1,666
204
Maryland
Jul 5, 2016
#8
  • Jul 5, 2016
  • #8
madmike1157 said:
You crazy.

Thanks for reminding me why I don't race anymore.
Click to expand...


nick cheats... hes on M1

Q16 is 17
C23 is 25 or so

need to know a lot more details before i can start to make suggestions
 
Reactions: 84Ttop
You must log in or register to reply here.

Similar threads

Hard to start when engine is cold
  • 86_Capri
  • Mar 11, 2026
  • 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk-
  • 2
Replies
32
Views
1K
1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk- Jun 21, 2026
CAMTWO1070
C
C4 trans help needed
  • CPH89LX
  • Apr 26, 2026
  • 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk-
Replies
6
Views
273
1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk- Apr 28, 2026
CPH89LX
C
Zero fuel pressure @ Shrader, but over 100 PSI at filter
  • Stang337
  • Jul 5, 2025
  • 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk-
Replies
5
Views
411
1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk- Aug 10, 2025
JD1964
H
Fuel starvation issues, 91 EFI to carb swap. Car dying after 1-3 gallons used. EFI tank, electric fuel pump, bypass regulator. Dual fed carb
  • hassler
  • Oct 11, 2025
  • 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk-
Replies
8
Views
842
1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk- Oct 12, 2025
nickyb
J
Help Figuring Motor Choice(Possible future turbo)?
  • jaygee15
  • Dec 14, 2025
  • 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk-
Replies
13
Views
748
1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk- Jan 3, 2026
Jarhead67
J
Share:
Bluesky Email Share Link
  • Mustang Forums
  • 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk-
Menu
Log in

Register

  • Forums
  • What's new
  • Media
  • Resources
  • Contact
  • Sponsor
X

Privacy & Transparency

We use cookies and similar technologies for the following purposes:

  • Personalized ads and content
  • Content measurement and audience insights

Do you accept cookies and these technologies?

X

Privacy & Transparency

We use cookies and similar technologies for the following purposes:

  • Personalized ads and content
  • Content measurement and audience insights

Do you accept cookies and these technologies?