440 RB cam diameter

[tan top]

     
bit of a long story 

, would appreciate any help ,     whats this  measurement / diameter  ( see picture below ) on a RB 440 cam ,  really needs to be an original chrysler cam  ,  but any accruate mesurment of  a 440 cam  would be appreciated too as in theroy  would be the same   

[Cooter]

Not sure if this is relevant here, but remember, all journals are different size as you move towards the rear of camshaft.

Also, I have ran up on about three 440 engines that the cam would NOT go in with new bearings installed. For whatever reason, be it core shift, etc; the bearings had to be sized to fit cam properly.

[John_Kunkel]

BB front cam bearing journals will measure 1.998"-1.999".

If you're having trouble installing a cam in new bearings the bearings are the problem, not the cam. New bearings have to be scraped to fit the cam.

[tan top]

Not sure if this is relevant here, but remember, all journals are different size as you move towards the rear of camshaft.

Also, I have ran up on about three 440 engines that the cam would NOT go in with new bearings installed. For whatever reason, be it core shift, etc; the bearings had to be sized to fit cam properly.

BB front cam bearing journals will measure 1.998"-1.999".

If you're having trouble installing a cam in new bearings the bearings are the problem, not the cam. New bearings have to be scraped to fit the cam.

thanks for the quick replies , Guys greatly  Appreciated    
long story cut short what i'm up to ,  had/ have this compcams  cam!  on the shelf for a few years , for one reason or another , did not put it in my current motor combo , went with another grind  , now i recently put on ported / worked  pair of 452s  ,  thinking doing a quick cam swap  , now here's why i needed to know diameter of front journal , just after i bought this cam kit , read over on moparts , or somewhere  , at that particular time  few people were having trouble with their  compcams out of speck , too tight  !on the front bearing , or something similar ,  cause i was not going to be using that cam at that time , decided to sort it out when i wanted to use it ,  
 well went to try this cam in a spare block (im buliding in to a stroker motor one day ) with new cam bearings,  the weekend  , too tight ,  on front bearing  ,  yeah i remember / know cam bearings need sizing /scraping , was going to make a bearing scraper out of a old cam , as per the info from this site !! , but had a brain fart , while back when clearing out junk & threw an old cam away i was saving to do this !
 i'm rambling on a bit now  
  end of story wanted to measure this cam  ,  don't want to take the motor appart only to find out , this is one of the out of spec cams that will be too tight  ,  wanted to get the swap done in half a day type thing ,



thanks again for the advice & info  appreciated 

[John_Kunkel]

When a cam won't fit the bearings, the front journal appears to be the binding point because it's the last one to be seen entering the block but, in reality, all five journals enter their bearing at the same time so any one or all of them can be the one that's too tight.

[tan top]

When a cam won't fit the bearings, the front journal appears to be the binding point because it's the last one to be seen entering the block but, in reality, all five journals enter their bearing at the same time so any one or all of them can be the one that's too tight.

   oh yeah  , good point , never thought of that !!
  !  think i'm just over thinking   , & just get on taking it appart ,&  see whats what !!
thanks again John  for your imput & advice  , its been greatly appreciated 

[metalstorm440]

You can use some Dykem ink on the cam to help tell what journal is tight also I think.

[tan top]

You can use some Dykem ink on the cam to help tell what journal is tight also I think.

   thanks for the  advice    ,  yeah i heard of that , never used the stuff though
!
  but was no need in the end , cam slid in smooth & turned freely    all done & back together now , fired up  & broken in !   
apart from grill front panel /bumper , prolly put that all back sometime over the weekend

thanks again guys for the imput & advice  , been appreciated