okay i have a Ultradyne Cam i put in my car... 276/286 duration.. IT Came with hydrolic lifters.... but when i took my stock cam out we noticed Roller lifters... so we left the rollers in with the Hydrolic cam.. would that cause a problem or should it be a little more power since it will leave less friction?..

 

GET THAT CAM OUT OF THERE, you WILL kill that cam and most likely the lifters to if it's not a roller cam

 

why will it kill it??... because the lobes on this cam are kinda sharper and more pointy.. then my rollor cam?

 

You simply cannot mix & match cam & lifter types.

A flat-tappet cam has a slight camber on it to spin the lifter around a little on each revolution so it doesn't wear in one spot.

Roller tappet cannot handle that slope. In addition, the roller puts a line load on the lobe, which requires a harder lobe than flat tappets.

Finally, the shape of the lobe is affected by the type of lifter (why the flat tappet lobes are sharper & pointier). A roller on a cam designed for flat tappet will be all wrong.

Hopefully you haven't started this engine yet. If you have, you've most likely wiped out both the cam and those expensive roller lifters.

 

uh-oh

 

It would be interesting to see the pile of shreds in the bottom of your pan if you ran it, especially if it were for any length of time.

 

The only mixing and matching I have ever seen without damage is the solid vs hydraulic.

 

i ran it for prolly 50-60 miles like that never ran real good so i never got on it
i had a friend install the stuff.. he's done it to his and other peopls engines i guess he thought rollor would be better.. but today i swapped the Hydrolic lifters in.. nothing was messed up on the rolloes... i checked that to see if maybe if messed up the cam... but there was no sign of wear yet so i got lucky .. i told my friend about the situation and how he messed up and he agreed to gve me %50 of my money back... so i will complete putting the front of the engine on tommarrow morning and let u guys know what happened.... and thank you for the quick answers and help!!!!

 

I would yank that cam anyway and throw it away. Its not worth the risk. That cam my come apart in 100 miles because of the abuse now, even though it looks good. Then you will be in a bunch of trouble. Dont chance it.

 

i never ran it for more then bout 10-15 minutes @ a time... it didnt look as if it had any scratches or marks or an ything on it...

anyways this is just my temporary motor till i get my 406 done .....

 

It may be more temporary than you think. A flat tappet cam is very very very testy as far as initial break in, and running. I wouldnt chance it, because I have dealt with the aftermath of a wasted cam. Its your choice.

 

Everyone who tells you to take that cam out is right.
You can get a new cam without lifters for about $60. As long as you have the engine down anyhow get a Crane Hi Energy, they're inexpensive and it's probably a better cam than the ultradyne anyhow.

http://cgi.ebay.com/ebaymotors/ws/eB...category=33614