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Author
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Topic: What octane gas to use 87 89 91?
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Svt Tony
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Member # 9959
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posted
 
 
My set up is
306 block, E cam, E7 heads ported, polished & decked, 1.94 & 1.6 valves, 30 lbs injectors, 70 mm TB, Eddie performer w/ 1" spacer, mac cai w/ fender well air filter, mac equal lenght headders, bassany x pipe 2 cats and my timing is @about 12* 5 spd.
What gas should I be running for max performance?
Thanx ca fords
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" u wanna play u gatta pay "
Posts: 1579 | From: 209 | Registered: Apr 2010
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RAP66
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Member # 3360
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posted
I would use 87 because it's cheaper and see how your motor runs. I'm running 10:1 + supercharged, so in my case I need to use 91 or better.
What's your compression?
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91GT Kurgan Tuned:12lbs of boost 492.4 rwhp / 483.1 rwtq
http://killcarb.org/
www.fordstrokers.com
Posts: 893 | From: SF Bay Area | Registered: Oct 2003
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89 306
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Member # 9042
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posted
I would go with 89
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02 mustang gt...mods soon to come!
89 lx: 306. edelbrock. heads..ported gt 40 manifolds..and all that other good stuff.
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The ant-ghetto sign is no joke. Degrade this forum with ghetto behavior and get the boot. Ghetto behavior such as street slang, no regard for education (spelling & grammar) and threatening others with violence has no place on CAFords.com. Please find another forum to demonstrate such behavior.
Posts: 1268 | From: richmond | Registered: Mar 2009
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Greasy
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Member # 5258
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posted
87
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'93 Cobra-Coyote Powered
'03 DSG Cobra
'13 Dodge Cummins
'14 Rubicon X
Posts: 3272 | From: North Dallas | Registered: Jan 2005
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Sydewayz_Stan
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Member # 10217
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posted
I use 91 whether stock or modded
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-90 Vert-SOLD
-91 Notch-SOLD
-2000 Explorer 5.0-SOLD
-72 Maverick-SOLD
-2004 GT, vortech V2 si, 10 psi-
-2002 F150 supercrew-
Posts: 3432 | From: 707 vallejo/richmond 510 | Registered: Aug 2010
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1fastmach1
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Member # 10137
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posted
quote:
Originally posted by sydewayzLX50:
I use 91 whether stock or modded
+1 no matter what i always use 91
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REDLINE MOTORSPORTS CC EST 2011
1993 CHP sold
2004 mach 1 408 Windsor n20 fed
R.I.P. JORGE GUTIERREZ JR
6/13/1982- 11/05/2013
Posts: 2592 | From: clawwwitter to 7th st | Registered: Jul 2010
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NEIGHT
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Member # 8741
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posted
quote:
Originally posted by 79 cobra:
quote:
Originally posted by sydewayzLX50:
I use 91 whether stock or modded
+1 no matter what i always use 91
+2 I run 91 in mine
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-Savage Habits-
1992 Summer Edition
1986 Hatch- catfish killer
1964 Impala hard top
Posts: 18548 | From: EA$T $IDE REDWOOD CITY | Registered: Nov 2008
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fredfifty
Since
9/2010
Member # 10320
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posted
i used to put 89 in my 89, but now i put 91 in my 91
[ January 11, 2012, 07:35 AM: Message edited by: fredfifty ]
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RIP EDSON VELORO
IM A NOOB, EXCUSE ME. THANKS.
92 LX Coupe 5.0 CARB'd BOLT-ONS SMOG LEGAL
62 Rag Impala
Posts: 4953 | Registered: Sep 2010
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94dropteezyGT
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Member # 2385
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posted
quote:
Originally posted by NEIGHT:
quote:
Originally posted by 79 cobra:
quote:
Originally posted by sydewayzLX50:
I use 91 whether stock or modded
+1 no matter what i always use 91
+2 I run 91 in mine
+3 only the best for mines
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" and im out... half a blunt hangin out my mouth speedin' like a demon on 101 south..."
R.I.P. Nicholas Bowley
R.I.P. Mike "Biggie" Aguilar
Posts: 159 | From: san francisco | Registered: Jan 2003
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MauriSSio
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Member # 9943
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posted
quote:
Originally posted by 209 FIVE.O:
My set up is
306 block, E cam, E7 heads ported, polished & decked, 1.94 & 1.6 valves, 30 lbs injectors, 70 mm TB, Eddie performer w/ 1" spacer, mac cai w/ fender well air filter, mac equal lenght headders, bassany x pipe 2 cats and my timing is @about 12* 5 spd.
What gas should I be running for max performance?
Thanx ca fords
it wouldnt hurt to use 91* i guess but it might not do anything for it.
Posts: 503 | Registered: Apr 2010
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FRC_Kid
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Member # 8940
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posted
Is the few extra cents really going to hurt you. even if you fill up, the price difference is very little...
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Pretend Racecar Driver- C5 FRC
Ford, GM, & Dodge is what I'm all about
Posts: 2578 | From: All over the Peninsula | Registered: Feb 2009
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Svt Tony
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Member # 9959
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posted
Thanx to all the responses I do have a tendency to use 91 in all my cars but just recently a friend told not to. This car I hardly drive so money wise is not gona break me. Just wondering what you guys tought and trying to get the best performance out my 306. Thanx again
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" u wanna play u gatta pay "
Posts: 1579 | From: 209 | Registered: Apr 2010
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Phil G 59
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Member # 10028
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posted
If you drive like my 82 year old mother use 87. If you drive like Kyle Bush use 91 :-)
Posts: 13 | From: San Rafael | Registered: May 2010
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Svt Tony
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Member # 9959
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posted
quote:
Originally posted by RAP66:
I would use 87 because it's cheaper and see how your motor runs. I'm running 10:1 + supercharged, so in my case I need to use 91 or better.
What's your compression?
10:1 as well
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" u wanna play u gatta pay "
Posts: 1579 | From: 209 | Registered: Apr 2010
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SLOWFOX
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Member # 11067
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posted
91 plus an lucas octane booster every 3 fill ups n u will feel the diffrence...
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" A Wolf under sheep's clothing"-svoRICK 2/10/12
Almost everything I asked for.
Posts: 2399 | From: ESSJ | Registered: Jul 2011
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Blind
2.3L
CAFords OG
Member # 3052
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posted
with that combo, if it doesn't ping at WOT with 87, run 87.
with the bumped timing you may need 89, but there's no reason to run 91 on a bolt-on 5.0
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89 LX Notchback ex 4cyl, 14psi
02 Harley F150, 15psi
Posts: 8521 | From: Fairfield | Registered: Jul 2003
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Svt Tony
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Member # 9959
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posted
quote:
Originally posted by Phil G 59:
If you drive like my 82 year old mother use 87. If you drive like Kyle Bush use 91 :-)
ha ha ha I dont know about Kyle Bush but more like Ricky Bobbit "if im not first im last" lol
shake & bake
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" u wanna play u gatta pay "
Posts: 1579 | From: 209 | Registered: Apr 2010
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MauriSSio
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Member # 9943
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posted
quote:
Originally posted by Blind:
with that combo, if it doesn't ping at WOT with 87, run 87.
with the bumped timing you may need 89, but there's no reason to run 91 on a bolt-on 5.0
this is the correct answer but who wants to listen for pinging and go through that whole "did you hear pinging? i coulda swore i heard pinging....it was pinging right?" debacle. but youre right in that if it doesnt need it, it wont help it. DCR plays a role in all this as well.
Posts: 503 | Registered: Apr 2010
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triple b
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Member # 8763
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posted
LOL my timing is 14 degrees if you run 18 you will need 91 octane even bolt-ons pings suks you will know if your car is pinging
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1988 4cyl conv 306 HCI "sasha"
2004 tahoe
Sold- 87 GT, 72 chevelle, 63 biscane, 82 monte carlo, 73 nova, 88 silverado,
Posts: 1730 | From: sacramento ca | Registered: Nov 2008
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MauriSSio
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Member # 9943
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posted
quote:
Originally posted by triple b:
LOL my timing is 14 degrees if you run 18 you will need 91 octane even bolt-ons pings suks you will know if your car is pinging
From what I've read, not all knock is easily perceptible or audible. And damage can happen even then
Posts: 503 | Registered: Apr 2010
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just_another_ 91
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Member # 9317
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posted
belive it or not i ran my fastest time with 87 octane with 18 degrees of timing with ported e7 head tfs1 cam and trickflow intake with mac headers and mac off road x pipe with flows
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R.I.P 91 Black LX: 13.45@102.62
Posts: 206 | From: CA | Registered: Jul 2009
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Svt Tony
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Member # 9959
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posted
quote:
Originally posted by just_another_ 91:
belive it or not i ran my fastest time with 87 octane with 18 degrees of timing with ported e7 head tfs1 cam and trickflow intake with mac headers and mac off road x pipe with flows
Nice!!!!
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" u wanna play u gatta pay "
Posts: 1579 | From: 209 | Registered: Apr 2010
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triple b
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Member # 8763
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posted
quote:
Originally posted by MauriSSio:
quote:
Originally posted by triple b:
LOL my timing is 14 degrees if you run 18 you will need 91 octane even bolt-ons pings suks you will know if your car is pinging
From what I've read, not all knock is easily perceptible or audible. And damage can happen even then
Yeah but the guy is worried about spending a 1 or 2 dollars more to fill up if your that worried about "unperceptible" knock go have it tuned but then there is cost involved...just run 91 if the engine is stock its not going to blow and who cares not like there is $ in that engine.. but to go back to "max performance" in the original post you need to have it tuned per dyno and adjust the timing and fuel pressure, if you don't have a adjustable fuel pressure regulator your not going to get max performance out of your combo....you can also take it to the track run 91 and slowly adjust the fuel pressure and timing till you get your best 1/4 time...BAM you got max performance "test and tune" day every sat @ sac raceway
[ January 12, 2012, 08:29 AM: Message edited by: triple b ]
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1988 4cyl conv 306 HCI "sasha"
2004 tahoe
Sold- 87 GT, 72 chevelle, 63 biscane, 82 monte carlo, 73 nova, 88 silverado,
Posts: 1730 | From: sacramento ca | Registered: Nov 2008
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MauriSSio
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Member # 9943
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posted
quote:
Originally posted by triple b:
quote:
Originally posted by MauriSSio:
quote:
Originally posted by triple b:
LOL my timing is 14 degrees if you run 18 you will need 91 octane even bolt-ons pings suks you will know if your car is pinging
From what I've read, not all knock is easily perceptible or audible. And damage can happen even then
Yeah but the guy is worried about spending a 1 or 2 dollars more to fill up if your that worried about "unperceptible" knock go have it tuned but then there is cost involved...just run 91 if the engine is stock its not going to blow and who cares not like there is $ in that engine.. but to go back to "max performance" in the original post you need to have it tuned per dyno and adjust the timing and fuel pressure, if you don't have a adjustable fuel pressure regulator your not going to get max performance out of your combo....you can also take it to the track run 91 and slowly adjust the fuel pressure and timing till you get your best 1/4 time...BAM you got max performance "test and tune" day every sat @ sac raceway
ive been saying it probably doesnt REALLY need 91 but might be wise to just run it. Its only a couple bucks more per fillup, no sense in being THAT stingy with money.
Posts: 503 | Registered: Apr 2010
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Svt Tony
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Member # 9959
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posted
quote:
Originally posted by triple b:
quote:
Originally posted by MauriSSio:
quote:
Originally posted by triple b:
LOL my timing is 14 degrees if you run 18 you will need 91 octane even bolt-ons pings suks you will know if your car is pinging
From what I've read, not all knock is easily perceptible or audible. And damage can happen even then
Yeah but the guy is worried about spending a 1 or 2 dollars more to fill up if your that worried about "unperceptible" knock go have it tuned but then there is cost involved...just run 91 if the engine is stock its not going to blow and who cares not like there is $ in that engine.. but to go back to "max performance" in the original post you need to have it tuned per dyno and adjust the timing and fuel pressure, if you don't have a adjustable fuel pressure regulator your not going to get max performance out of your combo....you can also take it to the track run 91 and slowly adjust the fuel pressure and timing till you get your best 1/4 time...BAM you got max performance "test and tune" day every sat @ sac raceway
Im not worried at all bout money since I hardly drive it. But when I drive it I drive it like I stoled it lol. Whats the point den let her have every now n den. I do have a fuel press reg set @ 39-40 psi. Yes I no wit a good tune it will be better. I dont really no anyone here in modesto that does that. So I think im gona run 91 chevron ( just for the hell of it) I do have the msd set up so it should all get burn reall good even 91 octane rite?
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" u wanna play u gatta pay "
Posts: 1579 | From: 209 | Registered: Apr 2010
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