I put my 1/4 mile times right around 12.95 to 13.05 with the 3.73 gears. Is this acceptable for my car considering the motor is 100% stock (all bolt ons)with 109K miles on? I see others with low 12 sec 1/4 miles with similar setups. The car seems to drive just fine and if there is no noticable issues so what could be keeping me out of the low 12's?

 

What do you mean when you say you "put" your 1/4 mile times right around 12.95 to 13.05? Have you run your car at the track? If so what where your incremental times and MPH in the 1/8 and 1/4?

 

The last track visit I had was in the 13.3x and will have the 3.73 gears installed so I figure it should drop about .2 to .3 tenth. I also only started from an idle but figure I might cut my 2.00 60' times a little with a 2000 rpm dump. My mph are right around 105.

 

Get better tires.

 

Don't be suprised that going to 3.73:1 will not help at all (if you came from a numerically lower ratio).

I really like the 3.42


-Scott.

 

The tires are the best thing I have ever bought for the car. It is almost impossible to break them loose and on dry pavement with them cold they grip incredibly. When I try to heat them up after 3 seconds they start to grip so well that I can't keep the brake holding the car still.

 

You do not have a low 12 second mph, unless you cut a 1.7 60'.

Have you ever had the car dynoed?
Do you have a wide band?

 

whats the trap?

You need a line lock.

 

Have never dynoed and no wideband. Im thinking or getting one so I can tune it better. The trap is 105. Got the gears installed today but the track is closed for the year. Have a place out in the country to do some 1/4 mile runs.