My LS3 doesnt feel all that fast!!

[ahart04]

Originally Posted by camaro67

it sure needs help its not much for a car thats suppose 2 have 426hp.

yea you're right they lied.

[Rockytophummer]

My car seemed slow at 1st. But at 500 miles she got peppier and at 1,000 same & so on. Biggest jump I noticed was at 2,000 miles on her. She just got mean! Like someone else had posted some people I think believe there car isn't going fast when you are actually moving at good pace! I took 2 friends for a ride around 2,000 miles and got on her. Let off when I hit 105mph and asked my buddy who riding shotgun so what you think? He said pretty nice get up to round 70mph. And 3rd guy riding in back slapped him and said how bought 105mph. Dude said your kidding & looked over and we still cruising at bout 90mph and dude was in disbelief that car was riding so smooth.

[Dr Jkel]

What were you guys driving before this car, mine seems very fast. Fast enough to kill you if you are not very careful

[ffrcobra_65]

Another thing to keep in mind is if you are driving/breaking-in the car at an easy pace and after a few hundreds or 1k + miles, you expect the engine to be preppier and wonder why it doesn't feel different, that would be because the comp never learned your performance-driving habit. I have 250 miles on mine and I always try to drive it so the 1-4 shift doesn't come on but I haven't romped on it yet, at least not past 4k rpm in any gear. When it has about 500 miles then I will start to let the needle climb more at each shift in a more consistent basis to start the learning process. At 1k miles, it should be pretty set and time to play now and then.

[Dakota Kid]

Mine is a freaking rocket. L99.

[Gentry78]

you have to run at least 3 tanks of 93 to get it back to where it should be for that one tank of 87

[SS 376]

I seem to remember reading somewhere that the fly-by-wire ECU is very sluggish/conservative when it comes to throttle response for the sake of maintaining fuel economy; i.e. it doesn't have the snappiness of a cable-actuated throttle. This could account for the car feeling relatively "slow". Can anyone confirm/deny this?

[patriotpa]

Originally Posted by Dakota Kid

Mine is a freaking rocket. L99.

Mine too! L99. Over 90 degrees with hot tires and I can break traction WITH traction control on from a standstill with just the throttle.

[camaro67]

my 68 camaro has got a 396 375 hp it will smoke the tires completly off it it will completly scream 2 and 3rd gear no comparsion to my 2ss rs the 68 will blow its doors off .go to a dragstrip and find you a good big block camaro chevelle vette ask them to race.ive been doing this stuff for 30 years i do know what im talking about. im just being honest.

[Bmble_B]

Originally Posted by Gentry78

you have to run at least 3 tanks of 93 to get it back to where it should be for that one tank of 87

+1 The pcm has 2 octane tables, high and low. When the pcm hears spark knock from the knock sensors it reverts to the low octane table. I've read the tables on my stock LS3 (before the maggie) and the low octane table was 14 degrees total timing less than the high octane table. The LS engines are very timing dependent. It will take 2 or 3 tanks of 93 octane before the pcm will revert back. When it does you WILL know it. The NBS truck octane table are the same way. Put 93 in your NBS trucks and wait for them to come alive. It works. then all you do is tune that new 6l80e and those trucks will spin the stock 20's!

[Rocky918]

Originally Posted by Rockytophummer

My car seemed slow at 1st. But at 500 miles she got peppier and at 1,000 same & so on. Biggest jump I noticed was at 2,000 miles on her. She just got mean! Like someone else had posted some people I think believe there car isn't going fast when you are actually moving at good pace! I took 2 friends for a ride around 2,000 miles and got on her. Let off when I hit 105mph and asked my buddy who riding shotgun so what you think? He said pretty nice get up to round 70mph. And 3rd guy riding in back slapped him and said how bought 105mph. Dude said your kidding & looked over and we still cruising at bout 90mph and dude was in disbelief that car was riding so smooth.

dude totally

[LSP2010]

Originally Posted by Rogue Leader

My car didn't really start to "wake up" till over 1000 mi.... 1500 mi even more.

At almost 3k now she flies.

thats the same wit my car every week i feel a differents once i was on the road next thing u know she kick scared me for a min but i was like damn this baby has power hidin inside

[JohnInSoCal]

in california we only have 91 octane, unless you put 100 octane racing fuel but that is very expensive. Maybe there are some places to buy 93 octane in socal but I haven't seen any, certainly not a widespread thing.

[AngryAmish]

Originally Posted by MontyCarlo

Is it sluggish according to a stopwatch, or according to your general "feel"? These cars are deceptively fast. 90 feels like 70, 70 feels like 55, 55 feels like 40, 40 feels like 20...

I learned that the hard way.