the stock gov springs only fuel to arround 2200 rpms before it starts to defuel, thats what your feeling. You can upgrade your gov springs to a 3k kit that fuels to 2700 - 2800 rpms or a 4k kit that fuels to 3500 - 3600 rpm.

 

My old 97 in bone stock form would pull hard to 3000rpm's. I would check the fuel press before spending $ on a GSK.

 

IMO the 4k will fuel to 4k too..... just gotta make sure your pressure is up and all.... i would check it out......

 

your sure you had stock springs? sounds like someone swaped springs

 

x2 My bone stock 97 215 p7100 fuels till about 2200.

 

you can get a 4k kit to fuel way past 4000rpm, I have not found out when mine starts to defuel yet and ive had it above 4300rpm

 

well i need the new tach thats being sent to me to see higher than that but its sounds like it goes way beyond i just need to see the actual number before i say how much farther....

but yes the springs sound like they were changed or that someone made washers for it even....

 

are you talking about a free rev?

I'm talking about under a load ( hooked to a sled in my case) 3500 rpm is all the further the power went with my 4ks.

 

under a load i can go past 4k....

 

how heavy of a load? how many clicks did you do?

On the street I can hit 4k easly but on a dyno or a sled pull after 3500 you can feel the truck start to defuel