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Fri Apr 20, 2012 2:28 pm

I'm in the process of putting together a 914 2L motor, for which I have a C35 Camshaft from Scat. My factory cam measured 24.86mm on all 3 bearing journals. The C35 however measured 25.90mm on all 3 journals!

I'm just about to return this cam, because I'm certain its machined incorrectly! Anyone else run into this issue before?

Fri Apr 20, 2012 5:26 pm

If it is larger than specified in the service manual then it is too big.

Whoever made it must have been using metric instruments, since they are about 1mm off

Sat Apr 21, 2012 2:12 pm

And when you do return it, they'll tell you they've never heard of this problem before.

Sat Apr 21, 2012 2:33 pm

Bruce wrote: And when you do return it, they'll tell you they've never heard of this problem before. ditto !!(is it the right cam for that engine ??)

Sun Apr 22, 2012 7:56 pm

Indeed it is the right cam for that engine. At least, I ordered the correct one! Item description said it was for a 1700-2000cc bus/914 engine.

http://www2.cip1.com/ProductDetails.asp?ProductCode=C15-20087

As mentioned, the journals are larger than the stock cam by about 1mm.

Mon Apr 23, 2012 5:29 am

If you can, have them swop the cam to a Web 494 or a 163 instead. The C35 was never that good a grind for the type 4.

I have never seen what you refer to. But there is a first for everything.

T

Mon Apr 30, 2012 9:24 am

I forgot to update this thread. I took the following photos. The first is of the factory cam that was pulled from the 2L 914 engine. It measures 0.986". The 2nd pic, is of the C35 Scat cam which measures 0.996". Clearly 0.010" too large! I've sent the pics over to the supplier, and I'm hoping to at the very least get a store credit.

Mon Apr 30, 2012 10:58 pm

oldskoolbug wrote: ... 2L 914 engine. It measures 0.986". The 2nd pic, is of the C35 Scat cam which measures 0.996". Clearly 0.010" too large!
That's not what you reported first time around. Was it over 1mm too big, or is it less? (stick with mm, your car is metric)
oldskoolbug wrote: My factory cam measured 24.86mm on all 3 bearing journals. The C35 however measured 25.90mm on all 3 journals!
oldskoolbug wrote:

This is not a good way to use those calipers. At the tips, they are least accurate. Try clamping further up the jaws as much as possible.

Mon Apr 30, 2012 11:41 pm

Bruce wrote: oldskoolbug wrote: ... 2L 914 engine. It measures 0.986". The 2nd pic, is of the C35 Scat cam which measures 0.996". Clearly 0.010" too large!
That's not what you reported first time around. Was it over 1mm too big, or is it less? (stick with mm, your car is metric)
oldskoolbug wrote: My factory cam measured 24.86mm on all 3 bearing journals. The C35 however measured 25.90mm on all 3 journals!

This is not a good way to use those calipers. At the tips, they are least accurate. Try clamping further up the jaws as much as possible.

You are correct. The first time I used the calipers, I don't think I had them "zeroed" out correctly. Clearly an error on my part in not using the tool properly. But the second time around, I took my time, and aside from measuring at the tips of the calipers, I did take an accurate reading. As accurate as I could, and the device can produce.

And yes the C35 cam is indeed larger than what its supposed to be by 0.010". In other words, sticking with mm, the correct size should be 25mm. The scat cam is 25.3mm. I have since purchased another C35 cam from a different supplier, and this one has the correct 25mm dimensions and fit the way it should. Clearly the first C35 I purchased was machined incorrectly.

I'm still waiting for a response from the original supplier, but I don't see an issue with them issuing a credit.