Because the most advisable not to work for me?

Luis911 · Jan 6, 2008

My mustang has only porting heads and compression of 130 lbs. I read a lot of information and come to the conclusion that for a stock engine the best values are:
Timing = 13 to 16 degrees
Spark plug = ASF42C or similar copper
Gap = .045

Because my best performance is with the following values?
Timing : 22 to 25 degrees
Spark plug = Champion BL15Y
Gap = .030 to .033

87foxstang · Jan 6, 2008

hey whatever works...is that on 93 octane i presume

NKau · Jan 6, 2008

Luis911 said:
My mustang has only porting heads and compression of 130 lbs. I read a lot of information and come to the conclusion that for a stock engine the best values are:
Timing = 13 to 16 degrees
Spark plug = ASF42C or similar copper
Gap = .045

Because my best performance is with the following values?
Timing : 22 to 25 degrees
Spark plug = Champion BL15Y
Gap = .030 to 0.33

My guess is that your balancer has 'slipped' and you are not really running 25 degrees. Very common problem with the factory balancers.

Luis911 · Jan 6, 2008

87foxstang said:
hey whatever works...is that on 93 octane i presume

I tested with 87 and 91 octane, 91 octane improvement but a combination of the spark plugs asfc42c with 91 octane is poor compared to 87 or 91 octane and spark plugs bly15

Luis911 · Jan 6, 2008

NKau said:
My guess is that your balancer has 'slipped' and you are not really running 25 degrees. Very common problem with the factory balancers.

Started to try to 10 degrees, the indictment was felt with little power to raise grades was more powerful, 2 weeks ago I went to the extreme and put him as 26 degrees. He moved Timebase IAC and use the value of 0,985 V, the scanner I was unable to remove the error 12 because RPM are as 950, below is not maintained and has low compression cylinder 5 of 122 lbs.

Foxfan88 · Jan 6, 2008

did you unplug the SPOUT when adjusting timing.

i dont see how anyone could run 15 degrees advance over stock. thats just too much even with good gas. if the engine is old i wouldnt hesitate to say the balancer has indeed slipped.

bloopbloob · Jan 6, 2008

yeah 25* doesnt seem right. like said above i'd check the balancer,make sure the spout is out, and check the timing pointer also. it could also just be your timing light. maybe try with a different one?

i'm running 17* on 87 octane, and i'm sure that is too much, but can't for the life of me figure out why it's high. i have a newer balancer, engine was recently rebuilt. timing pointer seems fine. i just stopped worrying about it a while ago. i can still take accurate timing measurements, its just that they all seem to be a couple degrees high.

when keeping the same timing (if set properly), increasing octane will actually cause a loss of power. higher octane fuel is only used so you can increase your timing (without pinging), which is where the gains will come from.

Luis911 · Jan 6, 2008

Foxfan88 said:
did you unplug the SPOUT when adjusting timing.

i dont see how anyone could run 15 degrees advance over stock. thats just too much even with good gas. if the engine is old i wouldnt hesitate to say the balancer has indeed slipped.

Disconnect the spout to make the test of timing and the engine was hot. Before already adjusted the time and left him marked up to 10 degrees, 1 month ago to buy a lamp craftsman and I checked the time with different combinations.
The car I bought 2 years ago and the previous owner told me that I had the porting heads, larger injectors and engine 351 (not told the truth) I check and the injectors are stock at 19 lbs and the engine is 302 (HO), I do not know how to verify whether heads are porting
I do not know if the car has something different and therefore the standards do not apply in my case, and according to the original 1981 engine, and make sure your head is E7TE.

stykthyn · Jan 6, 2008

if your car is a 1981 it should have E5 heads and a carburator.

Luis911 · Jan 6, 2008

stykthyn said:
if your car is a 1981 it should have E5 heads and a carburator.

Mustang 1981, conver. ext. 1990 and int. 1987 EFI 5.0 H.O. 5vel. + rev. MAP, ported head, rear 245/45 17", front 235/45 17"

PUNISHER RACING · Jan 7, 2008

I would run 89 octane and Autolite 25's gapped to .045 with 20 degrees of timing

85_SS_302_Coupe · Jan 7, 2008

Autolite 25s, .45 gap, 14* here.

PUNISHER RACING · Jan 7, 2008

85 that "Super Mullet" pic is killing me!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

85_SS_302_Coupe · Jan 7, 2008

PUNISHER RACING said:
85 that "Super Mullet" pic is killing me!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

ROCK OF AAGEEESS!! STIIIIILL ROOOOOLLIIINN!! ROCK ROOOOOLLLIIIIIINNN!!!!!

stykthyn · Jan 8, 2008

DEF LEPPARD!!!

Because the most advisable not to work for me?

Luis911

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87foxstang

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NKau

Luis911

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Luis911

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Foxfan88

My Grandpa has great wood.

bloopbloob

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Luis911

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stykthyn

I want to measure mine. It doesn't look that tall.

Luis911

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85_SS_302_Coupe

it sucks (I know) to be on the receiving end

PUNISHER RACING

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85_SS_302_Coupe

it sucks (I know) to be on the receiving end

stykthyn

I want to measure mine. It doesn't look that tall.

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Because the most advisable not to work for me?

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My Grandpa has great wood.

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