Measuring the Camshafts

Friday, October 16, 2009

 

Trust, but verify.


I took a set of stock ’99 cams and a set of aftermarket cams to Shine Racing Service to have them measured on their Cam Pro Plus.  The Cam Pro Plus system measures a cam’s profile and generates various graphs and reports.   Perhaps the most important report, the cam card, provides the information needed to degree the cams.  Degreeing camshafts is the process of dialing them in to the correct rotation/relationship to the crankshaft, but that’s a whole different story.


I measured the ’99 and aftermarket cams a few weeks ago.  The aftermarket cams I had were OK, but Dana suggested a cam with more lift and duration would be a good idea.  We reviewed a bunch of different options, including Web, Integral, and Maruha.  We decided to go with Maruha’s Racing Camshafts, in the 272° intake and 264° exhaust flavors, both rated at 10mm of lift.


I traded a few emails with Saiji of Maruha Motors about the cams.  I asked if the cams came with a cam card and how they are usually setup.  Saiji was helpful, but told me that the cams do not come with a cam card.  He did provide some suggestions as to how the cams should be degreed, but recommended that the cams be dialed in by a professional and tuned on a dyno.  I’m OK with all of that, since that was my plan to begin with.  Keep in mind that these are the Maruha Race cams, which are much more radical than some of Maruha’s other camshaft offerings.


I took the camshafts to be measured.  I’m happy with the results!  The cams are well made and show some very nice features.


PICTURES: Cam Pro Plus & Camshaft Testing & Results


 
 
 

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