key4

iTrader: (10)

I changed valve springs about two months ago and since we seeing some cooler wheather decided to run it. Well last time I ran my car it ran from a 7.15 to a 7.20 at around 94mph. Since Ive changed springs best I can get is a 7.38 to 7.40 at 92mph. Car hooked both times and same track

I went from a pac 1218 to a pac 1518. Car is not missing and has fresh plugs. Im no expert at valve train so Im just wondering if I did something wrong? Theres no unusal valve train noise. Will also be doing a compression test this weekend but just wondering if anybody has ran into this problem?

Also did a fuel pressure test too but I just did it at idle never took it down the road and did any wot runs. Fuel pressure was fine at idle.

garygnu

are they new springs ?make sure all you rockers are tight.

key4

iTrader: (10)

yes they brand new springs and I will triple check to make sure the rockers are tight this weekend.