[DeTomaso] Cam wear

Dave Londry davel at emspace.com
Thu Jun 3 19:14:25 EDT 2010


New Crane springs just installed at 295# open Tony
The old ones were 270 something.
I'm thinking it had an unhappy break-in.
The local cleveland guy says one of the bad things people do is crank 
them over with the coil disconnected,
 thinking that they're doing a good thing by raising some oil pressure.
dave

-- 
Dave Londry
Embedded Spaces Inc. (ESI)
davel at emspace.com

604 589 9183 phone/fax
604 721 2278 cell
Skype:embeddedspaces



Tony DiGiovanna wrote:
> That's a lot of wear for a cam lobe.  4% of your lift.  Check your spring
> pressures.
>
> -----Original Message-----
> From: detomaso-bounces at realbig.com [mailto:detomaso-bounces at realbig.com] On
> Behalf Of Dave Londry
> Sent: Thursday, June 03, 2010 3:56 PM
> To: DeTomaso Forum
> Subject: [DeTomaso] Cam wear
>
> That 275DEH cam is a dual profile with 0.300 lift intake and 0.315 
> exhaust (at the cam)
> Measuring the lobes
> 1I    5I    2I    6I    3I    7I    4I    8I
> 1.707 1.702 1.707 1.703 1.713 1.706 1.715 1.714   average 1.708
> 5E    1E    6E    2E    7E    3E    8E    4E
> 1.699 1.694 1.563 1.700 1.701 1.701 1.704 1.702   average 1.700 (without 6E)
>
> - You'd maybe say that the intakes lost quite a bit more material than 
> the exhausts,
>  even though it was an exhaust lobe that went away.
> - It's not clear that there's any front to rear trend.
> - I would have said 1E was suspect but it's only 0.010 from the biggest (8E)
>   and the intakes vary by 0.013
>
> Damn - I have to go back to tax returns
> dave
>   
>
>   



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