terrible quarter mile time

J

jahen65

New Member

Sep 29, 2004

16

0

0

ontario

May 20, 2005

#1

• May 20, 2005

• #1

the first time i took my 65 mustang out to the track it did 16.3 due to no traction on cheap nitto 225/60/15 so i invested in bf goodrich street legal slicks, now i have ran four times and my car hooks off the line but it lost performance greatly. my car doesnt downshift hard like it used to could this be due to the bigger heavier tires? also i upgraded from 195/60 r15 to 225 60 15 in front.

 

J

jahen65

New Member

Sep 29, 2004

16

0

0

ontario

May 20, 2005

#2

• May 20, 2005

• #2

also

by the way now the best run with these better tires are a terrible 16.8 not that my first runs were any better.

 

F

ForceFed70

That's why they call it "dope"

Founding Member

Dec 6, 1999

4,818

1

69

BC Canada

May 20, 2005

#3

• May 20, 2005

• #3

Hmmm..

So is your car slower or what's your complaint? How much slower? Why would your car be downshifting in a drag race?

16 second times in a 65 with a 289 doesn't surprise me at all...

 

F

ForceFed70

That's why they call it "dope"

Founding Member

Dec 6, 1999

4,818

1

69

BC Canada

May 20, 2005

#4

• May 20, 2005

• #4

jahen65 said:

by the way now the best run with these better tires are a terrible 16.8 not that my first runs were any better.

Click to expand...

ahh..OK, it is slower.

Can't tell you why. Maybe the car is bogging off the line because of the better traction? What are your 60ft times? How fast is the car moving at the end of the 1/4?

Have you done any engine work? Like I said.. I would expect 16second runs from a near stock 65.

 

J

jahen65

New Member

Sep 29, 2004

16

0

0

ontario

May 20, 2005

#5

• May 20, 2005

• #5

yes my car is slower it doesnt pick up speed as it used to, i meant downshifting on the street when i step on it. actually the engine is built descent with 270 horses at crank. (estimate)

 

mach1one

Boulevard Bruiser

Founding Member

Oct 30, 2001

4,775

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0

Living in the past

May 20, 2005

#6

• May 20, 2005

• #6

If you're running slicks + auto w/o a high stall, you'll bog like crazy off the line. That's why there's higher stall converters.

Plus you added weight in the front with the bigger tires.

And 16 sec sounds reasonable out of a 30 y.o basically stock classic.

 

B

Billgear

Founding Member

Jun 27, 2000

500

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0

Concord, CA

May 20, 2005

#7

• May 20, 2005

• #7

What is your trap speed?