when i drive the the SS(99) hard it feels like its being held back, its loud but feels like its not moving as fast as it should . car is stock and has 111,000. iv changed the spark plugs,oil,tranny fluid,fuel filter,pcv valve,and sea foamed it (sea foam in gas tank ,engine , intake) has anyone had this problem ? would changing the diff fluid help ?

 

you are not going to notice any difference by changing the fluid in the rear thats for sure

what exhaust? how long have you had it? do you mean less fast than normal or not as fast as you hoped (you just bought it)

cause I've never been in a stock ls1 fbody that felt fast, they're faster cars than they feel

 

You have to release the e-brake for maximum power

 

Do you have cats on the car? If so it could be clogged cats

 

could be your 02s slowly failing.

 

If you still have the stock air lid change to an aftermarket one that flows better. And a good quality air filter.

 

Get it on the track, then you will know if its actually being held back or if the car is as fast as it should be.

 

take those cats off ; throw an offroad pipe on there

 

car should be fine... start modding it

 

thanks for alll your input , it does have slp air lid with k&n filter , and everything else is stock cats exhoust , my check engine light was on and it gave the code of a bad cat but then i hauled *** on the free way and it turned off. ive had it for 3 monthes

 

solution: remove the cats

 

 

Your not too far away, let me take it for a spin. I will determine if it is fast enough. . . . . . . . . . .

 

there you go

ill be in AZ in a week ill take it out for ya too

 

Did you sea foam it before you did all the maintenance?

 

samson 420 you can drive it when ever you want , i sea foamed it then did all the maintenance