Have any one used their springs, if so how were they?

I need a set for my rebuild that can handled at least .600 lift. Their price seem to be good. Was just wondering how were there products.

 

Whatever cam you select should have a recommended spring package on the cam card. Valve springs are something you want to get right the first time.

 

There are very few valvespring manufacturers. TPIS does not make springs and I would strongly doubt they even have any made to their spec. They are going to be a rebranded spring.

There is a lot more to springs than peak lift capacity. Ask the grinder what seat and nose pressure you need then compare those numbers to spring specs.