So what should a stock 1995 Z28 run? For those that don't know I'm very new to the LT1, so I'm not sure on their stock 1/4 times. Any help would be great. Thanks.

 

Bone stock cars usually run high 13's to low 14's.

 

if its an auto Id say 13.9 -14.1
If its a stick 13.9 with a professional driver
14-14.4 with a average driver
14.5 with a relitivly novice driver
Tires are also a factor.

 

My car bone stock(95 Formula,auto,2.73) ran a best of 14.02 @ 99mph on street tires. At the time, it had 122K on it.

 

Ok, so my best of 14.9 is a little slow then! She is a convertible though, so I would imagine it is heavier. And I am a experienced driver, not pro but it certainly wasn't my first time. I guess she needs a really good tune up.

 

you usually don't see times higher than very low 14's.... you should try the basic stuff, oil change, air filter, plugs/wires/coil.... more than likely something is wrong.

 

13.81@102 M-6 1994 Z-28

Verts will be a few tenths slower, and what rear gears do you have assuming you have an auto? This could play a part also.

 

The "slowest" stock LT1 convertible I've seen run was a 14.3 @ 98.xx with a 2.2 60'...what was your mph and 60' time, that may tell some of the story. Auto or manual, mods?

 

My mods are none so far. My mph was 95.54 and I beleive my 60' was in the 2.2 range. I did notice under hard throttle she hesitates shifting gears, she seems to jump in the rpm just a little before she shifts. It that normal, has it happened to anyone else?? My gears are 2:73 and she is an auto.

 

Also, whats your elevation and how was the weather? All of that can affect your et.

 

The elevation is sea level, and the air temp was 25-30 degress C*, that would be in the 80's F* for my american neighbours.

 

Any other suggestions? I would just like to try and get has many opinions as possible so I can attack the problem right.

 

i have seen lt1's go from 13.8's to 15.1 in the hot texas heat. my car went 14.4-14.5 stock. now with just a cut out and cai it goes 13.8 w/ no tires. what im saying is work on your 60' and get good tires. part of the problem is your 60' and the weight of your car, work on the 60' get a catback, and a cai with just those your 1/4 will drop .2-.5!!!!!!!!also try some free mods, you wont see big gains but every little helps.

 

10's

 

Well, just for a reference, mine's a t-top so I have a little less weight, but stock with A4/2.73's/street tires it ran 14.0@99 with a 2.2 in about mid 80's temps at sea level.

Your mph definitely sounds low to me, but that could just be minor tune plugs/wires/airfilter/tire pressure/extra crap in the car, type stuff. <shrug>