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SVTPerformance's Chain of Restaurants
The Blower Bistro
SHM 4V Turbo cams
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<blockquote data-quote="GPowrie" data-source="post: 10000901" data-attributes="member: 110532"><p>Regrinding cams to increase duration and lift is actualy normal to do. The way they are doing it is by reducing the base circle of the camshaft(I belive thwy do it .050") which is why you have to run spacers under the lash adjuster. As far as the orignal posters question though, I had problems with a set SHM regrind cams. The modular ford camshafts are very sensitive to run out on the base circle. What basicly happens is the lash adjuster will adjust to the lowest spot on the base circle and hold the valve slighly open on the rest of the base circle. The engine will make basicly no cranking compression and be down on power and hard to start. It may have been an isolated experice I had but I doubt it.</p></blockquote><p></p>
[QUOTE="GPowrie, post: 10000901, member: 110532"] Regrinding cams to increase duration and lift is actualy normal to do. The way they are doing it is by reducing the base circle of the camshaft(I belive thwy do it .050") which is why you have to run spacers under the lash adjuster. As far as the orignal posters question though, I had problems with a set SHM regrind cams. The modular ford camshafts are very sensitive to run out on the base circle. What basicly happens is the lash adjuster will adjust to the lowest spot on the base circle and hold the valve slighly open on the rest of the base circle. The engine will make basicly no cranking compression and be down on power and hard to start. It may have been an isolated experice I had but I doubt it. [/QUOTE]
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SVTPerformance's Chain of Restaurants
The Blower Bistro
SHM 4V Turbo cams
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