I was wondering what a stock LT1 will top out at. I have a 97 SS M6 with 3.42's a few mods here and there and last night i took it for a spin and was doing 140 in 5th with a lot of power left. I didnt want to go much higher cause i dont think my one tire will make it, and i was comming up on some cars and didnt want to do 150+ past a cop. i should easily be able to past my speedo right? most of my mods are in my sig.

 

I believe most magazines hit somewhere around 163 in tests...

 

MY 97 BONE STOCK !! paper filter and all !!! on the peg no problem in 5th.

 

I have buried mine a few times. It can be done.

I read a book last night with highlights from magazines since 1993 all on F-body's. The LT1's usually maxed out in the 160's.

-Dustin-

 

I was clocked at 177 before the cam and heads.

 

around 125-130 it started to viberate a little bit. once i get some new tires i'll probably git it another shot. without a cage i didnt want to risk my tire blowing and killing myself, a cage would help a little i think. I've had it to just over 125 on a dyno and like 115 on the road before, starting at 70 in 6th.
last night i dropped it to 3rd at around 50 and took off, i flew past a car that was doin about 60 or 70. when i started he was way in front of me, i probably scared the **** out of him my car was screaming, i must admit it was fun. i don't know how the nascar guys can drive 170+ for hours straight. my tires arent even Z rated.

 

Holy crap you guys are crazy, I've had mine to 105 and my heart was racing, I was in a few curves though.

 

I wouldnt go over 120 w/ out z rated tires.

 

145 in my Z28 with 2.73's took allot of road or at least I though so.
That's what spun my rod bearing.
O well at least now I can take my time and build the original one.


Chris G.

 

FYI, the pcm isn't capable of handling speeds higher than 255

If you have a scanner, even after you pin the speedo you can still read your speed accurately right from the PCM.

 

What
So we can't make a car that does over 255 MPH.
And there are no car's that go over 255MPH?
I must be misunderstanding what your talking about.


Chris G.

 

In 1993, the camaro was tested by Car and Driver....Their top speed was 152mph.. Not sure of other models.... My '93 was clocked at 154mph by police radar with a -1/+1 mph of error....

 

my car is an automatic and i was doing about 147 at 5500 rpm's, in dont know if the torque converter will lock up or not under that much load, but with a manual and that double overdrive i can definetly believe 160+, i have heard upwards of 165 is possible but i have never seen it personally. i have gone 170 on a bike and i am not sure i would want to do it in a car. crotch rocket+170mph=adrenaline rush,, car+170mph= death wish, in my opinion. cars dont stop so fast from that speed (even on their roof!!!)

 

Could also be your drive shaft. Pretty common on an LT1. Mine vibrates at 115 MPH.

 

Not to sound uncool or anything, but I really hope you guys don't kill anybody driving that fast. That's pretty reckless in my opinion and I doubt most of you have the skill you think you do at those speeds.