Need opinion for octane

stang_racer20 · 09-30-2003, 08:33 PM

look in my sig and take a look at what i run. i also plan on running the cam for about 5 to 8 degrees of advance. what octane gas should i run with this. or should i run regular with some octane booster. and opinions would help. thanx

BilLster · 09-30-2003, 11:37 PM

run the lowest octane you can with out detination

running higher octane acctually can reduce hp.
unless timing is advanced to take advantage of it.

Hethj7 · 10-01-2003, 10:35 AM

Quote:

Originally posted by BilLster
run the lowest octane you can with out detination

running higher octane acctually can reduce hp.
unless timing is advanced to take advantage of it.

Ditto. Running more octane than your car needs does not help power.

stang_racer20 · 10-01-2003, 10:57 AM

thanx so far for the response but i already know that too much octane will cause problems and performance issues. i was asking for exact numbers from people who run the same or similar setup with an advanced cam on a stroker inparticular

BilLster · 10-01-2003, 01:19 PM

two identical engines will run with some degree of diffrence
thats why i said start with $5.00 of the lower or mid grade gas and see how it runs.

Elevation and other factors have alot to do with it.

at sea level i run 6 points higher octane with octane boost. for comparable performance up here in Calgary

b055 · 10-02-2003, 09:20 PM

why didnt you include compression ratio? quench? deck height? is the piston in or out of the hole? how much? gasket thickness? piston design? etc......

stang_racer20 · 10-02-2003, 10:46 PM

Quote:

Originally posted by b055
why didnt you include compression ratio? quench? deck height? is the piston in or out of the hole? how much? gasket thickness? piston design? etc......

347 stroker
twisted wedge heads
8.5: 1 dished pistons
quench?
8.2" deck height
piston in or outta the hole?
.039" thick head gasket, 4.145" bore
5 - 8 degrees timing advance

b055 · 10-05-2003, 01:21 PM

why advance the cam that much???????

with that compression any cheap *** gas should work.. unless u have a power adder.. why so low a compression????????

my 347 stroker has 13:1 compression 11lb of boost and a 225 shot of nitrous and it only takes 116 octane for me to stay out of detnotation.

09-30-2003, 08:33 PM	#1
stang_racer20 Registered Member Join Date: Jun 2003 Location: Wisconsin Posts: 348	Need opinion for octane look in my sig and take a look at what i run. i also plan on running the cam for about 5 to 8 degrees of advance. what octane gas should i run with this. or should i run regular with some octane booster. and opinions would help. thanx __________________ 92 Mustang GT, 347 Stroker(Forged Steel Crank/Rods-Balanced, Forged Aluminum Dished Pistons), Trick Flow Track Heat Intake, Trick Flow Twisted Wedge Heads w/ Stage 3 port/polish, 80mm C&L MAF, FMS 30# Inj., BBK AFPR, Trick Flow Stage 2 Cam, Trick Flow 1.6R Rockers, BBK E.L. Headers, Flowmaster Cat-Back, MAC CAI, FMS Pulleys, Griffin Alum. Radiator, MSD Pro-Billet Distributor; AOD, Dynamic 3300 Lockup Converter, B & M Super Cooler, B&M Ratchet Shifter; 3:73 gears.

09-30-2003, 11:37 PM	#2
BilLster Registered Member Join Date: Oct 2000 Location: Ontario canada Posts: 446	run the lowest octane you can with out detination running higher octane acctually can reduce hp. unless timing is advanced to take advantage of it. __________________ 89 with 331 t3'/t4 hybrids. upr Suspention worked out finnaly . 9.89 144 mph .

10-01-2003, 10:57 AM	#4
stang_racer20 Registered Member Join Date: Jun 2003 Location: Wisconsin Posts: 348	thanx so far for the response but i already know that too much octane will cause problems and performance issues. i was asking for exact numbers from people who run the same or similar setup with an advanced cam on a stroker inparticular __________________ 92 Mustang GT, 347 Stroker(Forged Steel Crank/Rods-Balanced, Forged Aluminum Dished Pistons), Trick Flow Track Heat Intake, Trick Flow Twisted Wedge Heads w/ Stage 3 port/polish, 80mm C&L MAF, FMS 30# Inj., BBK AFPR, Trick Flow Stage 2 Cam, Trick Flow 1.6R Rockers, BBK E.L. Headers, Flowmaster Cat-Back, MAC CAI, FMS Pulleys, Griffin Alum. Radiator, MSD Pro-Billet Distributor; AOD, Dynamic 3300 Lockup Converter, B & M Super Cooler, B&M Ratchet Shifter; 3:73 gears.

10-01-2003, 01:19 PM	#5
BilLster Registered Member Join Date: Oct 2000 Location: Ontario canada Posts: 446	two identical engines will run with some degree of diffrence thats why i said start with $5.00 of the lower or mid grade gas and see how it runs. Elevation and other factors have alot to do with it. at sea level i run 6 points higher octane with octane boost. for comparable performance up here in Calgary __________________ 89 with 331 t3'/t4 hybrids. upr Suspention worked out finnaly . 9.89 144 mph .

10-02-2003, 09:20 PM	#6
b055 Registered Member Join Date: Mar 2003 Location: philadelphia ms Posts: 180	why didnt you include compression ratio? quench? deck height? is the piston in or out of the hole? how much? gasket thickness? piston design? etc...... __________________ i got mustangs. do u?

10-05-2003, 01:21 PM	#8
b055 Registered Member Join Date: Mar 2003 Location: philadelphia ms Posts: 180	why advance the cam that much??????? with that compression any cheap *** gas should work.. unless u have a power adder.. why so low a compression???????? my 347 stroker has 13:1 compression 11lb of boost and a 225 shot of nitrous and it only takes 116 octane for me to stay out of detnotation. __________________ i got mustangs. do u?

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