Looking to stay just bolt-ons for a lil while longer, but have a feeling that my stock springs are getting a lil weak. The car has 81K miles on it, and is showing a dip in the dyno graph around 52-5300 rpms, then comes back up around 5700 or so. When the car is cold, it's shown as much as a 75 rwhp drop during thos periods, but as the car gets warmer, the dip gets smaller and smaller.

I also have an audible detonation, but according to the Wideband O2 readings on the dyno, my air-fuel is dead on.

I'm thinking I might be getting a lil valve float, so I thought I would replace the stock springs and see if it helps.

What are your guys' opinions?

Thanks!

 

I don't know if you have a cam or not but I'll assume "no" since you are using stock springs. Personally, without a need to upgrade, I'd use a replacement set of stock ones. Just a little refreshing is all you'll need, I think.

 

Nope, no cam. Everything is stock.

 

I would throw a set of LS6 springs on. It can't hurt, and you could always install hotcam or ASA hotcam later...


Tommy

 

Very good point Toomy, I completely forgot about the LS6 springs!! :doh: Thanks alot man!

 

hot cam springs r good to .525" and r only like $30... '02 ls6's r good to .570" or so and r around $90...