Measuring the damn S2 camshafts....... :p - Honda Prelude Forum

Ritteri · 03-12-2003, 12:38 PM

OK guys I ordered some micrometers, should be home before me. I am also going to make a wooden jig that will hold the camshafts and allow them to rotate in their cradle. Maybe this will allow accurate measurements? Either that or I can install em back into the car and get accurate measurements. Just tell me what to do. Ill do it Thursday. If I need specific measureing tools tell me now so I can overnight em to my house.

71dsp · 03-12-2003, 12:40 PM

That will tell you the specs at the cam, but I would think that most people would be more interested in the actual lift and duration at the valve.

You don't need a micrometer to measure the cam. You need a dial indicator.

Ritteri · 03-12-2003, 12:42 PM

OK, just a basic dial indicator? Thats it? Will this one suffice? http://www.sears.com/sr/product/summ...id=00940165000

marcucci · 03-12-2003, 01:18 PM

Billy, you're making him make this more difficult than it has to be.

Ritteri, using a jig like you are talking would require a dial indicator and is how you would ideally measure lift AT THE LOBE. You can just as easily measure the cam from the tip of the lump to the back of the base circle with a regular micrometer (like you used the c-clamp), then we could compare this to a stock cam to get the difference in lift. Not as ideal, but it would be enough to verify their numbers.

If you're going to buy something, buy the dial indicator and make a pair of v-blocks to set the cam in. Attach the dial to the block, zero it on the base circle, then spin the cam around and measure peak lift. I was trying to save you money since your local parts store probably has calipers, or you can probably buy a set of cheap plastic ones for $10 or so.

71dsp · 03-12-2003, 01:26 PM

Quote:

Originally posted by Ritteri
OK, just a basic dial indicator? Thats it? Will this one suffice? http://www.sears.com/sr/product/summ...id=00940165000

NO, that's a caliper, you need a dial indicator.

Ritteri · 03-12-2003, 01:35 PM

Quote:

Ritteri, using a jig like you are talking would require a dial indicator and is how you would ideally measure lift AT THE LOBE. You can just as easily measure the cam from the tip of the lump to the back of the base circle with a regular micrometer (like you used the c-clamp), then we could compare this to a stock cam to get the difference in lift. Not as ideal, but it would be enough to verify their numbers.

Yeah thats what I thought to begin with. Anyway I have a full set of these coming in tommarow morning. I just wanted to put this to rest once and for all. If these dont measure out you know who will be getting a "friendly neighborhood phonecall" from me!

Anyway. I am still going to purchase a Dial caliper and a dial indicator. Sears has a dial caliper Ill be getting, but where do I get a decent dial indicator for a good price?

Ritteri · 03-12-2003, 01:45 PM

Here is a link I found: http://shop.auctionwatch.com/satco/p...d=1&categ=7517

Just give me the list of tools that would be most useful to purchase: They seem to have micrometers in both inches and metric. I assume the metric would be the best bet. If someone could spend 5-10 minutes and go over these few pages of products, tell me what would be most useful for my arsenal of tools for this engine rebuild, and for testing cam specs etc. I would appreciate it.

71dsp · 03-12-2003, 01:47 PM

Look up Mitutoyo Dial Indicator on EBay or on Yahoo. You will turn up tons of hits.

As for using a caliper to measure the gain in lift, you won't know what the gain is unless you know the stock lift. Does the Helm's contain these numbers? IIRC, the Helm's just contained the overall measurement on the lobe from front to back, not the lift measurement.

marcucci · 03-12-2003, 08:56 PM

Crower's web site has lift. Doesn't matter. I'll get a set in my hands and measure them myself, this is just goddamned ridiculous.