I am wanting to know if anyone has used one of Summit's K-3500 camshafts in their 460 powered truck?

Duration @ .050"
intake 204 / exhaust 214

Lift
int. 479 / exh. 504

lobe seperation
112

Or would it be a decent choice for a low dollar cam?

Thanks,

 

Anybody?

Is this grind any good for a truck cam?

 

No personal experience with that particular cam, but the specs look like it would be fine.

 

Thanks.

Deen gave me some info too.

Thanks to him also.

 

I put that mild cam in my 460. It's very good. It's a good starter on cold mornings, and when you get down on it good and hard, it will answer up. My 77 F-150 will break loose at almost any speed. It's a little tough to drive on a rainey day though. I dont notice a bit of difference in the fuel milage at all. still about 10 Mpg.
You may have read that I'm having trouble starting it when it's hot. But another poster is saying a New Distributor cleared that up on his 460. I'll know more abou that this winter when I get home.

 

Thudpucker

Thanks for the reply.

So it was an improvement in performance over stock?

 

Yes, I'd have to say, ' Yes' it was an improvment. My engine is bone stock, otherwise. It idles smooth. I love that power.

 

Thudpucker

Were you able to still use your stock valve springs with it?

Summit told me I could. I was just wandering.

 

Yup, the stock springs worked fine. I measured each one. All good, so in they went.
I'm up in West Seattle now. Is that close to you?

 

Thudpucker

Thanks for your responses, I ordered the K3500 cam from Summit a couple of hours ago.

If that "West Seattle" is in the state of Washington. That would be a "no" on being close to me. I'm in Indiana.

 

You might want to check your valve spring seat pressure before putting that new cam in. If your motor has high mileage, your springs may be worn out, and may not have enough pressure to keep the valves from floating at higher RPMs. You can pick up a spring pressure tester at autozone for like 20 bucks. Not too acurate, but it will give you your general pressure area, talk to summit about what pressure is recommended for your cam

 

73Highboy

I just got my heads back from being rebuilt. The machinist said the spring pressures were all in the high 80lb range. But I have been rolling it around in my mind to just go ahead and change them out while everything is still easliy accessed.

Summit told me my stock springs would work with this cam. I gave them the high 80lb figure my machinist had given me.

 

80lb will work, but if the heads are off you might as well put a new set of 90-100lb springs on. Nothing will lots of pressure, that will flatten your cam fast, but enough to keep valves from floating and will last many miles. A good set of Crane, Comp Cams, or my preference Crower or Lunati springs cost like 40-60 bucks new, and are worth it

 

73Highboy

Thanks for the reply, I have a lead on some new ones with a 95 pound spring pressure. They are a double spring, I think. For around $45.00.

 

On the subject of valve springs and new cams. Always use new valve springs with a new cam. Old springs are very hard on new cams!

Tim