a few questions after going to tack...

88hatchblack

New Member

Jul 25, 2004

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Willard, Ohio

Apr 11, 2005

#1

• Apr 11, 2005

• #1

a few questions after going to track...

I went to the track this sunday. with the stuff in my sig, 75*F weather with low humidity, about 1200ft above sea level; and with removed front sway bar I ran 14.18 @ 98.32 mph with a 2.17 60'. very dissappointed. i ran a 14.28 with the crappy stock motor with like 100k+ miles!! does that seem slow for the mods to anyone else? any input would be appreciated. also; how much differnce would a TFI make? my friend switched TFI's from an ACCEL back to the stock E6 unit and went from 14.2 to 13.9 with a stock 86' motor with an EDELBROCK intake.

 

5spd GT

"the 5.0 owns all"

Founding Member

Aug 7, 2002

9,516

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99

Arkansas

Apr 11, 2005

#2

• Apr 11, 2005

• #2

Yeah that time is slow (the mph is what is most important)...what is your timing at? Spark plug gap? Fuel pressure at? How is your clutch? What about your driving skills

 

notchback

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May 30, 2000

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St Clair Shores MI

Apr 12, 2005

#3

• Apr 12, 2005

• #3

sounds like you need a dyno tune

i too ran 14.20's in a bone stock 5-speed w/ 2.73 gears and street tires

i'd say your off by 3/4 second and 8 mph

 

B

BaXTeR3221

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Jan 12, 2004

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Orange County, NY

Apr 12, 2005

#4

• Apr 12, 2005

• #4

Agreed, try playing with the timing/fuel pressure at the track or have it professionally tuned on a dyno.

 

darthcual

Member

Mar 31, 2005

985

19

18

Arlington, TX

Apr 12, 2005

#5

• Apr 12, 2005

• #5

Well the sea level is not gonna help you out any, thats for sure. You'd run a much quicker time hear in Texas.

DC

 

88hatchblack

New Member

Jul 25, 2004

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Willard, Ohio

Apr 12, 2005

#6

• Apr 12, 2005

• #6

I have a centerforde DF clutch, FP at 42PSI vac off, timing advanced to 14*, plugs are brand new AUTOLITE 25's gapped to .60 (I have a MSD 6AL), driving skills are good I guess...I'm certainly no pro.... ...I'd love to get it dyno tuned, but there's nowhere around here to do that.

 

88hatchblack

New Member

Jul 25, 2004

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Willard, Ohio

Apr 12, 2005

#7

• Apr 12, 2005

• #7

any ideas on how i could diagnose the problem?

 

88hatchblack

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Jul 25, 2004

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Willard, Ohio

Apr 12, 2005

#8

• Apr 12, 2005

• #8

anyone?

 

88stangmangt

Active Member

Nov 25, 2003

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Stafford,VA

Apr 12, 2005

#9

• Apr 12, 2005

• #9

you can tune it with my car wanna line up with me??......you should be in the 12's easy...though.....you got that maf calibrated right......like stated above you need a dyno something has you by the balls....

 

T

thinker

Founding Member

Jun 26, 2002

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Corona, Ca

Apr 12, 2005

#10

• Apr 12, 2005

• #10

yeah those times do not seem right at all, my motor is stock and I ran 14.20 @ 98.7 and I ran about the same 60ft time as you lol, bad I know but it was my first time out.

 

Ranchero5.0

The Voice of Reason

Jan 1, 1999

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Hagerstown MD

Apr 12, 2005

#11

• Apr 12, 2005

• #11

Stupid stuff first, have someone mash the accelerator pedal while you look at the throttle plate to make sure it's opening all the way although with the 70 it's almost too big even at 80% throttle compared to the rest of the motor.
did you port #1 and 5 ports on the GT40 lower? They are almost as tight as a stocker.

I'd also redo the calculations on the comression ratio, you may not be making the power you should just from that.

Jamie

 

88hatchblack

New Member

Jul 25, 2004

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Willard, Ohio

Apr 13, 2005

#12

• Apr 13, 2005

• #12

Ranchero5.0 said:

Stupid stuff first, have someone mash the accelerator pedal while you look at the throttle plate to make sure it's opening all the way although with the 70 it's almost too big even at 80% throttle compared to the rest of the motor.
did you port #1 and 5 ports on the GT40 lower? They are almost as tight as a stocker.

I'd also redo the calculations on the comression ratio, you may not be making the power you should just from that.

Jamie

Click to expand...

all the ports were were made larger, but they're all the same size. they were gasket matched as well. it wasn't done by me. the heads were decked so machinist said the CR should be 9.6-9.7. i think I'll do a compression check on all the cylinders first, then some other stuff to rule out any problems with the engine. then just go from there. i pullde the codes, but nothing major. i wish i had an a/f ratio meter but i don't have the $$....if i can't find the problem i'll try switching parts one at a time from my friend's car to see if i can figure out the problem (MAF, Computer, sensors, ect...)

 

88hatchblack

New Member

Jul 25, 2004

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Willard, Ohio

Apr 13, 2005

#13

• Apr 13, 2005

• #13

but wouldn't it be easy to tell if one of those was the problem? or could something like a bad MAF, sensors,TFI, or Computer even make that big of a difference?

 

Funanin

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Nov 26, 2001

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Horsham, Pennsylvania

Apr 13, 2005

#14

• Apr 13, 2005

• #14

u could try backing off that fuel pressure to 40... I know alot of guys that run 11's with stock fuel pressure. (38psi)

 

88hatchblack

New Member

Jul 25, 2004

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Willard, Ohio

Apr 13, 2005

#15

• Apr 13, 2005

• #15

tried that at the track---slower by .02