14* timing + 87 octane = WOT ticking only?

jaymac

New Member

Feb 18, 2004

995

0

0

Northern Mass

Apr 22, 2005

#1

• Apr 22, 2005

• #1

I bumped my timing to roughly 14-15* yesterday and still ran 87 and never heard any ticking until today I gave it WOT and then I heard this loud metallic racket, so I came off it right away and watched all my guages and listened and sniffed. Something smelled a little burnt, but it went away quickly. Gauges were fine, ran smooth part and half throttle. Ran WOT again, heard it a little bit and came off, figured it must be detonation from the 87, so stopped at a gas station and put in 5 gal. 93. Tank was a little less than half full w/ 87 already, so now it's mixed... I stepped on it a few times and progessively heard less and less of the racket as I kept driving. On my last trip to home, I didn't put it to the floor, but about 80%, and heard nothing.

So, could this noise have been bad detonation? FYI, the timing "might" be @ 15* (I couldn't actually see to pinpoint the EXACT # )..
The other thing I think it POSSIBLY could've been is a loose socket or something I might've left in the bay getting rattled around at 5000 rpms?
Highly unlikely as I took a thorough inventory, but just a guess.
No notcieable fluid leaks anywhere, but I'll go back down and check and report back.

Thanks guys!
J

 

89MustangGX

I have nothing productive to add!

Jul 3, 2001

10,262

1

0

Mill Creek, WA

Apr 22, 2005

#2

• Apr 22, 2005

• #2

Sounds like detonation. You'd only hear it at WOT, and the description is accurate.

Sounds like higher octane gas will solve your problem, just decide which you'd rather have -- the timing or the expensive gas. Of course, you could try bringing it back down to something like 12* and see if it runs ok on 87 as well.

 

jaymac

New Member

Feb 18, 2004

995

0

0

Northern Mass

Apr 22, 2005

#3

• Apr 22, 2005

• #3

well, that's a relief to hear! I was hoping I didn't F something up big-time! 93 is certainly not cheap, but my car's the only thing I spend money on (oh yeah, and rent , bills , bills , and more bills , oh yeah, and my fiance. DOH!! )
When 93 hits $2.50, I'll bring her back down....
J

 

ill advised

Member

Apr 29, 2003

656

10

19

West L.A.

Apr 22, 2005

#4

• Apr 22, 2005

• #4

Yeah, I think 14 with 87 octane is pushing it. How are you liking the new (tranny) set up?

 

I

Idwitheld-1`

New Member

Nov 30, 2003

335

0

0

Portland Oregon

Apr 22, 2005

#5

• Apr 22, 2005

• #5

jaymac said:

well, that's a relief to hear! I was hoping I didn't F something up big-time! 93 is certainly not cheap, but my car's the only thing I spend money on (oh yeah, and rent , bills , bills , and more bills , oh yeah, and my fiance. DOH!! )
When 93 hits $2.50, I'll bring her back down....
J

Click to expand...

I really think that Fiance is hurting your performance. I would ditch it.

 

I

Idwitheld-1`

New Member

Nov 30, 2003

335

0

0

Portland Oregon

Apr 22, 2005

#6

• Apr 22, 2005

• #6

What is your serial number of the 88Mac?

 

jaymac

New Member

Feb 18, 2004

995

0

0

Northern Mass

Apr 23, 2005

#7

• Apr 23, 2005

• #7

ill advised - it took a few days of getting used to the high stall, but I'm defnitely likin' the whole setup. Shift's hard, launches (TOO hard for my traction!) hard. Pulls nicely!

idwitheld-1 : There are days, my friend, there are days....

Did you want the production # (#1035) or the vin #?

 

04sleeper

Founding Member

Jun 22, 2002

2,674

14

89

Dallas, TX

Apr 23, 2005

#8

• Apr 23, 2005

• #8

Even if you mix half of a tank of 93 with the 87 you don't bring up the octane by much. I have a lot of friends try this before with race gas and they insist on draining the tank and refueling with the higher octane.

I know that you are not going to do this just letting you know the difference in ratings.

I would instead try to run an octane booster until you refuel. Just to be safe.

 

accidentprone86

New Member

Apr 1, 2005

189

0

0

Westminster Colorado

Apr 23, 2005

#9

• Apr 23, 2005

• #9

yo i run 13* advance on 85 octane.
Their is no detonation "At least i dont think" i think i have a letle valve chater.
Also altitude might have an effect on it.?

 

I

Idwitheld-1`

New Member

Nov 30, 2003

335

0

0

Portland Oregon

Apr 23, 2005

#10

• Apr 23, 2005

• #10

jaymac said:

idwitheld-1 : There are days, my friend, there are days....

Did you want the production # (#1035) or the vin #?

Click to expand...

....too many days jay, too many days indeed....

My girlfriends McLaren is 88-566. Bone stock except for AFPR and Flowmasters...

 

89MustangGX

I have nothing productive to add!

Jul 3, 2001

10,262

1

0

Mill Creek, WA

Apr 23, 2005

#11

• Apr 23, 2005

• #11

accidentprone86 said:

yo i run 13* advance on 85 octane.
Their is no detonation "At least i dont think" i think i have a letle valve chater.
Also altitude might have an effect on it.?

Click to expand...

Altitude definitely has an effect.

 

jaymac

New Member

Feb 18, 2004

995

0

0

Northern Mass

Apr 25, 2005

#12

• Apr 25, 2005

• #12

ID WIthheld - #556, huh? Guess it's like my older sister, then!
i was going to keep mine bone stock, but after it was hit big-time and re-constructed, there goes the collector value!! Oh well, I guess I'll just have to settle for making it fast instead

I'm not really sure what my altitude is here , but I haven't put it to the floor since, and I'm prob. going to wait until I can refill w/ fresh 93 before I try it again!