How would my truck perform with these I'm converting over to P-pump and putting governor springs in it and looking to get bout 350-400 hp after swap I found these 150# springs on Industrial Injection's site for sale for 155.00 and tought that ain't bad. So would these be too stiff or would I be fine?

 

Probably going to wipe the lobes off your cam.

I assume you are doing a 4k kit on the P-pump? The "60 psi" springs will be fine for that, the 150 # springs are for a wild cam and I'd consider them a race only part. For a 3k kit no spring upgrades are needed.

 

Ok thanks that was what i was wondering anybody else got in put

 

Daves advice right on for springs. dont go with 150 lbs. a 350 hp properly built ve pumped truck runs better than a 350 hp p-pumper from my experience. variable timing in the ve is one reason.obviosly for 500+ hp go p-pump! plan on lots of supporting mods required to use the power however.

 

Not from my experience... When my brothers truck was around 350rwhp, (a long time ago..) it ran great. However, if you build the P-Pump truck to 350rwhp the "right" way, than it would run just as good if not better than a VE truck. The reason VE trucks probably run better at 350rwhp, is because you have to upgrade a lot of things to get to that rwhp level. With a P-Pump, a couple of mods will get you there, without having to upgrade a lot of other things.

Having said that, a 350rwhp VE will still be faster than a 350rwhp P-Pump.

 

I remember a post by Old Smoky saying that "VE" stood for "Very Efficient". At close to 400 RWHP I still see 18.5 MPG city and 22+ MPG highway.

Bob