How much timing can you run on 87 octane??

Chevyguy · 09-10-2001, 07:58 AM

After putting almost 15K miles on my Mustang, and always having a nice Sunpro dial in timing light, I finally checked the timing on the stang. I first checked it as is, got about 17°. Thought that was high, checked my engine sticker, which was on the broken off coil cover courtesy of the PS pump fiasco 2 weeks ago. They list 10°, but first have to remove the spout conn. I had found this during the valve cover change, right in the TFS harness. So pop it off, start it up I get 8°. I was tempted to bring it up then, but looks like I need a special wrench to reach the bolt, like a ford version of my Chevy wrench which is a 9/16 hex. I assume 12 or 13 mm.

Next Q, what is the average max timing I can run on 87 octane?? If I am going to bump to 10° would like to go higher if I can. I know it's mostly trial and error, just want to get some ranges to play with.

Oh, yeah, after I get a good 87 baseline, I will find a good setting for 92-93 octane for track blasts before the track closes for winter

Then I'll put some #'s up for ya guys

------------------
Frank W
90 5.0 LX coupe Daily driver. Silencer removed, K&N filter. Flexalite fan, 3 core radiator. FMS flywheel and Clutch, FMS blue wires Energy Suspension end links
88 Notch 2.3L 5 speed Parts/beater car My two Notchbacks

74 Chevy Laguna Type S-3 305 Finally fixed getting a 454 to put in garage
<A HREF="http://www.chevellepages.com/folingo" TARGET=_blank>www.chevellepages.

jonnyk · 09-10-2001, 09:27 AM

I say 10-12 degrees on 87. Just a guess, every car is different.

------------------
'91 LX Hatch, 17 ROH ZR6's, lowered, 3.73's, offroad H pipe, SN Cobra cat-back, ASP pullies, 14° timing, C&L 76mm MAF, 170A 3G, B&M Ripper on a T5
Best ET: 14.593 @ 94.62 2.292 60'
1991 LX Hatch 5.0L

Chevyguy · 09-10-2001, 10:35 AM

Oh Jeez, I wonder if I am the only 87 octane warrior out there

I can't see myself burning 92 for the daily work blast.

LX XLR8R · 09-10-2001, 10:43 AM

i run 16deg on 87 but i have alum heads and they dissapate CC heat betta and i run 2 range colder plugs

------------------
1987 black notch(ex 4 banger)
DSS 306 w/ main support...Elderbrock 6028 heads..gt-40 intake..24# injectors...70 mm tb..77 pro-m...accel 300+..mac full legnth..tremec w/ pro5oh...full MAC exhaust,off road h-pipe,long tubes, catback...ron davis radiator..subframes, control arms...CFDF II..o yea holley FPR sucks..dont buy one..
AIM=onesillynotch

PKRWUD · 09-10-2001, 02:49 PM

If your base timing is at 8 degrees, then it is retarded two degrees. 10 should be your base of reference. set it there and go for some hard runs up and down a kid-free street. You know the routine. 2 degree increments until you and the engine are both happy. BTW, it's a 1/2" hold down bolt. A 13mm will fit, but will be just loose enough to slip and strip the bolt head.

Take care
~Chris

------------------
Retired Moderator
MustangNet

My site: JimPorterRacing

RACECAR spelled backwards is RACECAR

HEY !!! Are you ASE Certified ??? If you are, ask me about iATN. The best tool you'll ever have, and it's free !!!

Chevyguy · 09-10-2001, 03:47 PM

Oh jeez, it figures it's still a SAE fastener when all the others are Metric. The Z shaped 1/2" wrenches are easy to find at least.

------------------
Frank W
90 5.0 LX coupe Daily driver. Silencer removed, K&N filter. Flexalite fan, 3 core radiator. FMS flywheel and Clutch, FMS blue wires Energy Suspension end links
88 Notch 2.3L 5 speed Parts/beater car My two Notchbacks

74 Chevy Laguna Type S-3 305 Finally fixed getting a 454 to put in garage
<A HREF="http://www.chevellepages.com/folingo" TARGET=_blank>www.chevellepages.

09-10-2001, 07:58 AM	#1
Chevyguy Backyard Mechanic/Chemist Join Date: Feb 2001 Location: Acton MA USA Posts: 435	How much timing can you run on 87 octane?? After putting almost 15K miles on my Mustang, and always having a nice Sunpro dial in timing light, I finally checked the timing on the stang. I first checked it as is, got about 17°. Thought that was high, checked my engine sticker, which was on the broken off coil cover courtesy of the PS pump fiasco 2 weeks ago. They list 10°, but first have to remove the spout conn. I had found this during the valve cover change, right in the TFS harness. So pop it off, start it up I get 8°. I was tempted to bring it up then, but looks like I need a special wrench to reach the bolt, like a ford version of my Chevy wrench which is a 9/16 hex. I assume 12 or 13 mm. Next Q, what is the average max timing I can run on 87 octane?? If I am going to bump to 10° would like to go higher if I can. I know it's mostly trial and error, just want to get some ranges to play with. Oh, yeah, after I get a good 87 baseline, I will find a good setting for 92-93 octane for track blasts before the track closes for winter Then I'll put some #'s up for ya guys ------------------ Frank W 90 5.0 LX coupe Daily driver. Silencer removed, K&N filter. Flexalite fan, 3 core radiator. FMS flywheel and Clutch, FMS blue wires Energy Suspension end links 88 Notch 2.3L 5 speed Parts/beater car My two Notchbacks 74 Chevy Laguna Type S-3 305 Finally fixed getting a 454 to put in garage <A HREF="http://www.chevellepages.com/folingo" TARGET=_blank>www.chevellepages.

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09-10-2001, 09:27 AM	#2
jonnyk Being stroked is great Join Date: Oct 1998 Location: Alberta, Canada Posts: 772	I say 10-12 degrees on 87. Just a guess, every car is different. ------------------ '91 LX Hatch, 17 ROH ZR6's, lowered, 3.73's, offroad H pipe, SN Cobra cat-back, ASP pullies, 14° timing, C&L 76mm MAF, 170A 3G, B&M Ripper on a T5 Best ET: 14.593 @ 94.62 2.292 60' 1991 LX Hatch 5.0L

09-10-2001, 10:35 AM	#3
Chevyguy Backyard Mechanic/Chemist Join Date: Feb 2001 Location: Acton MA USA Posts: 435	Oh Jeez, I wonder if I am the only 87 octane warrior out there I can't see myself burning 92 for the daily work blast.

09-10-2001, 10:43 AM	#4
LX XLR8R Dirk Diggler Join Date: Feb 1999 Location: SLOATSBURG, NY Posts: 1,931	i run 16deg on 87 but i have alum heads and they dissapate CC heat betta and i run 2 range colder plugs ------------------ 1987 black notch(ex 4 banger) DSS 306 w/ main support...Elderbrock 6028 heads..gt-40 intake..24# injectors...70 mm tb..77 pro-m...accel 300+..mac full legnth..tremec w/ pro5oh...full MAC exhaust,off road h-pipe,long tubes, catback...ron davis radiator..subframes, control arms...CFDF II..o yea holley FPR sucks..dont buy one.. AIM=onesillynotch

09-10-2001, 02:49 PM	#5
PKRWUD Junior Member Join Date: Mar 1999 Location: Ventura, California Posts: 8,981	If your base timing is at 8 degrees, then it is retarded two degrees. 10 should be your base of reference. set it there and go for some hard runs up and down a kid-free street. You know the routine. 2 degree increments until you and the engine are both happy. BTW, it's a 1/2" hold down bolt. A 13mm will fit, but will be just loose enough to slip and strip the bolt head. Take care ~Chris ------------------ Retired Moderator MustangNet My site: JimPorterRacing RACECAR spelled backwards is RACECAR HEY !!! Are you ASE Certified ??? If you are, ask me about iATN. The best tool you'll ever have, and it's free !!!

09-10-2001, 03:47 PM	#6
Chevyguy Backyard Mechanic/Chemist Join Date: Feb 2001 Location: Acton MA USA Posts: 435	Oh jeez, it figures it's still a SAE fastener when all the others are Metric. The Z shaped 1/2" wrenches are easy to find at least. ------------------ Frank W 90 5.0 LX coupe Daily driver. Silencer removed, K&N filter. Flexalite fan, 3 core radiator. FMS flywheel and Clutch, FMS blue wires Energy Suspension end links 88 Notch 2.3L 5 speed Parts/beater car My two Notchbacks 74 Chevy Laguna Type S-3 305 Finally fixed getting a 454 to put in garage <A HREF="http://www.chevellepages.com/folingo" TARGET=_blank>www.chevellepages.