F1 says there Pro/Sportsman valve springs were designed for the Helix 2 and 3 cams. Can they be used with the stock cam? I would like stiffer springs for higher rpm fueling. If not, what spring options are there. Is it even worth it or are the stockers o.k. for the occasional high rpm run?

 

I think I read somewhere that the stock springs are good to around 3500 rpm.

 

i think theres a couple guys running that setup on here

 

The F1 springs are fine with a stock cam. Tim

 

Thanks. I think I'm gonna stick with the stock springs for now. And try not to get carried away with the high rpms......

 

Umm. A little birdie told me that they are too stiff and that it will wear the cam.

 

I heard a similar chirp on comp d a while back

 

would 6.7l springs work in the 5.9

 

Befor you think that its ok to run high rpms with stock springs look at what happend to my motor. this was where between 3500-3700 rpms.

http://www.competitiondiesel.com/for...ad.php?t=22839


Oh yea my motor only has 9000mi on it.

Benn Duvall

 

We have had no issues with F1 Springs on a stock cam. Several trucks running that way over a year. Tim

 

THe rpm's is not the only thing hindering the stock springs so to say. Also look at what boost numbers/airflow you have. It is also possible that the stock springs could be getting forced open a little and letting air go by. Thats one more thing to think about.

 

I to am running heavier springs with stock cam. Not been in there long enough to tell.

 

Good luck to you slow. Im sure if the professionals are sayin it will hold up im sure you'll be ok. DonM is on today maybe he will respond as to how good that cam will last.

 

I don't push my motor anywhere near 3,500 rpms. It would just be a precautionary measure. I'll be in there doing studs anyways so I am just trying to kill 2 birds with 1 stone.

 

we know you want the springs...