cam help

cam help

Joined: December 2nd, 2007, 9:47 pm

June 7th, 2012, 1:16 am #1

Hey guys, I have a 408c that has 11 to one compresson and a cam with the following specs, duration I 281 E 287 duration at .050 I 250 E 256. lobe seperation 109. intake center line 105. rockers are both 1.75. valve lift I .728 E .740. The heads are B351s with matching roush intake both ported, heads flow 360. The motor dynoed at 637 hp and 575 tq. This engine was never used as listed and I am looking to see if a hydro roller cam can be used to replace the solid roller listed above. would the new cam be a straight switch ? Any new cam spec ideas ? thanks The current cam is to much for the street.
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Joined: May 20th, 2005, 4:48 pm

June 7th, 2012, 1:23 am #2

It wouldn't be a straight swap though....would need a valve spring change, pushrods, lifters, cam, etc, etc.

Where was the peak with the solid roller and where do you want it to be? What's the engine going in?

Brent Lykins
B2 Motorsports, LLC






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Joined: November 18th, 2002, 1:16 pm

June 7th, 2012, 3:52 am #3

Hey guys, I have a 408c that has 11 to one compresson and a cam with the following specs, duration I 281 E 287 duration at .050 I 250 E 256. lobe seperation 109. intake center line 105. rockers are both 1.75. valve lift I .728 E .740. The heads are B351s with matching roush intake both ported, heads flow 360. The motor dynoed at 637 hp and 575 tq. This engine was never used as listed and I am looking to see if a hydro roller cam can be used to replace the solid roller listed above. would the new cam be a straight switch ? Any new cam spec ideas ? thanks The current cam is to much for the street.
Paul, I think heather had given you a few options when you called last week, as Brent verified her info, the hydraulic is not a direct swap, The right hydraulic cam core, and base circle are critical to performance and longevity.

Mark McKeown
McKeown Motorsport Engineering, Inc.
http://mmeracing.com
http://racecrateengines.com
Mark McKeown
McKeown Motorsport Engineering Inc
http://www.mmeracing.com
301-246-9225
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Joined: December 2nd, 2007, 9:47 pm

June 8th, 2012, 1:48 am #4

It wouldn't be a straight swap though....would need a valve spring change, pushrods, lifters, cam, etc, etc.

Where was the peak with the solid roller and where do you want it to be? What's the engine going in?

Brent Lykins
B2 Motorsports, LLC





The peak of the solid roller was 6800 rpm and Im looking for 6500. The car is a 68 mustang with a G force six speed and a 4.30 rear. Im just not sure what to look for in a hydro roller cam, and what to expect thanks.
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