fhptom Posted November 30, 2007 Share Posted November 30, 2007 After talking with Paul(Braap) and some others I am thinking I might have gone a little light on my cam choice for a dedicated track car. Thru friends I have several more aggressive cams I could could get my hands on. My question is that suppliers always suggest/demand you use new rockers lashpads etc any time you change cams. If you are just going to change the cam to test engine response, both seat of the pants and dyno pull, can you get away with not changing all the other parts? A hundred bucks for each cam would get costly if you are just short running them. Any HORROR stories from not changing them. Tom Quote Link to comment Share on other sites More sharing options...
nismopick Posted November 30, 2007 Share Posted November 30, 2007 The reason they want you to change the rockers is because the stock rockers & cam have a certain wear pattern after all those miles. If you put a new cam in, the stock rockers can wear the new cam lobes as well... doesn't always happen, but it's a possibility. Quote Link to comment Share on other sites More sharing options...
Administrators BRAAP Posted November 30, 2007 Administrators Share Posted November 30, 2007 It is completely and totally acceptable to reuse L-series rocker arms. Domestic V-8 engines with the flat tappet rotating style lifters, this would be a BIG no-no. With the non rotating flat wiping over head cam L-series, reusing rocker arms is fine, but only if the rockers are in good condition. If the rockers to be used have any sort of excessive wear or the typical high mileage/poor oil/tuneup maintenance L-series “divot†in the rocker, discard that rocker, do NOT use it! If you have the budget, new rockers are always sound advice, but not necessary if you have a set of rockers in good overall condition. If a rocker is at all questionable throw it away or use it as a fishing weight. If what I’m saying isn’t enough to convince you it is ok, keep in mind that Rebello uses “seasoned†rockers on some of their GT racing L-series engines without failure. If that isn’t enough testimony for you, then by all means, purchase new rockers. You will be well served. You can even order them through Rusch Motorsports… Quote Link to comment Share on other sites More sharing options...
z-ya Posted November 30, 2007 Share Posted November 30, 2007 You can reuse the used rockers. Find used rockers that don't have a ridge worn in them. Or you can send them out to be reground at Delta Camshaft. I think they charge $3 each to regrind them. They look like new after the regrind. You must swap in the correct lash pads to obtain the correct wipe pattern for a given cam. If you assume they are correct, you can severely damage the cam and rockers almost instantly. Quote Link to comment Share on other sites More sharing options...
steveosupremeo Posted November 30, 2007 Share Posted November 30, 2007 i resurfaced mine starting with 320 grit sandpaper, then 600, then 1000, just to make sure, didn't really take much material off, just made sure there wasn't a lip at the edges. they are looking good after about 7K on the cam. Quote Link to comment Share on other sites More sharing options...
WizardBlack Posted December 1, 2007 Share Posted December 1, 2007 i resurfaced mine starting with 320 grit sandpaper, then 600, then 1000, just to make sure, didn't really take much material off, just made sure there wasn't a lip at the edges. they are looking good after about 7K on the cam. IMHO that really would not have done anything for you unless you used a pretty stiff block to to block sand. Otherwise you simply have smooth u-shaped rockers (or they could have been). Quote Link to comment Share on other sites More sharing options...
cjames Posted December 2, 2007 Share Posted December 2, 2007 Or you can send them out to be reground at Delta Camshaft. I think they charge $3 each to regrind them. They look like new after the regrind. $3 ea from Delta huh? sounds good, The best I've found is reman rockers from a local Z shop for $12.95/exchange. assuming your cores qualify. I wonder if they use Delta to re grind their cores? hmm Quote Link to comment Share on other sites More sharing options...
steveosupremeo Posted December 3, 2007 Share Posted December 3, 2007 wizard black- lay the sandpaper on a nice flat table and drag with an even pressure the length of the pad surface. its not hard and nowhere close to a u shaped rocker. helps if you keep count of the strokes on each one. Quote Link to comment Share on other sites More sharing options...
Xnke Posted December 3, 2007 Share Posted December 3, 2007 Works even better if you get one of those 25$ granite surface plates....hell, then you can even test the flatness... Quote Link to comment Share on other sites More sharing options...
cjames Posted December 3, 2007 Share Posted December 3, 2007 Just got an email back from Delta cam. They quoted $100 to regrind a set of rockers. One day turn around. And I think that includes return shipping. Quote Link to comment Share on other sites More sharing options...
WizardBlack Posted December 4, 2007 Share Posted December 4, 2007 wizard black- lay the sandpaper on a nice flat table and drag with an even pressure the length of the pad surface. its not hard and nowhere close to a u shaped rocker. helps if you keep count of the strokes on each one. Ah OK. That'd count as block sanding then. Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.