how can i tell my car (1994 z m6 48,xxx miles) seems very fast!!!!!!!
like 12's
i got it tested by g tech with my friend and my 0-60 were 5.2 5.2 and one 4.9 and 1/4 mile 13.9, 13.7, 13.6 is that stock?
how can i tell if its stock??????????????
i bought it a month ago and the owner didnt say that there were mods

 

well, most noticably would be exhaust and headers. does it look like or sound like stock exhaust? does it have the stock manifolds or headers? is the stock airbox in tact or is there a home made or aftermarket cold air intake? those are the obvious ones

 

How do you get "12s" from G-tech readings of mid and high 13s?

 

13.9 sounds stock....13.6 I'm not sure about. However if it has gears and tires it could do that...

 

the exhaust sounds weird but the mufler its stock it says gm and some #
stock intake too

 

i think i have 3.73 and g force tires

(i said 12's cuz it seems really fast its not near 12's though)

how accurate is g tech?

 

Stock or very lightly modified...

 

Properly done, a G-tech is within a couple tenths either way to actual strip times.

 

G Tech is supposedly accurate within 1-2 tenths for the 1/4 mile.

 

i went from a ford escort wagon to a my z28 and it felt fast as hell when i first drove it