Picture of my wreck in 1993

Post by **negusm** » Thu Jun 05, 2008 4:30 pm

86capriasc wrote:How would I measure it if I can get one?

Good question.

tfs2121 · Post by **tfs2121** » Thu Jun 05, 2008 10:55 pm

i could exsplane but i have a very very hard time putting what i am trying to say into words. after you strugle reading through what i am trying to say you will still be clueless. maybe i can find a link online...

tfs2121 · Post by **tfs2121** » Thu Jun 05, 2008 11:01 pm

ahhhh sweet copy and paste... i love google.

"Mike the cam lobe from top of point to heel (up and down), then mike it 90 degrees from that (sideways). Subtract the small dimension from the large"

the numbers might be off a bit but should be close to the .277" or .300"

B-C=A easy!

hope this helps!!! looks like the hard part will be learing how to read a mike

86capriasc · Post by **86capriasc** » Fri Jun 06, 2008 12:01 am

I will try it with my dial caliper.

Okay, I get .310 difference.

86capriasc · Post by **86capriasc** » Fri Jun 06, 2008 12:11 am

Looks like I may be doing a cam swap soon. I just don't know if the valves will clear the pistons on the stock 89 block with 1.7 RR.

tfs2121 · Post by **tfs2121** » Fri Jun 06, 2008 12:26 am

.310" humm... i would think that you would have gotten a reading alot closer to .300" like .302" or .299" what did you use a mike or a caliper?

86capriasc · Post by **86capriasc** » Fri Jun 06, 2008 12:29 am

I used a caliper.

tfs2121 · Post by **tfs2121** » Fri Jun 06, 2008 12:30 am

an E303 cam has a lift of .311"

i dont know what you got... its for sure not a stock cam

tfs2121 · Post by **tfs2121** » Fri Jun 06, 2008 12:32 am

86capriasc wrote:I used a caliper.

was it a dile caliper?

86capriasc · Post by **86capriasc** » Fri Jun 06, 2008 12:34 am

The caliper I have is old so it may not right on either. I will try took take it down to my buddies house later tomorrow or over the weekend. He is a machinist so he has better tools than I. I will have him mic it. He can check both intake and exhaust for me. I'm not sure which one I checked.

tfs2121 · Post by **tfs2121** » Fri Jun 06, 2008 12:37 am

I and E should be the same if its a B or E cam... sounds like you have a B cam and a crapy caliper. i would for sure have your buddy mic it out for you if you plan on installing it. he might even degree it for you!

86capriasc · Post by **86capriasc** » Fri Jun 06, 2008 12:40 am

Just checked the adv.
Ford Racing hydraulic roller camshaft M-6250-B303 that provides significant horsepower increases above 4000 RPM and good low-end torque. Valve lift is .480" on both intake and exhaust. Duration at .050" is 224 degrees on both intake and exhaust

Sorry i did my math wrong

1.42
-1.71 as written on my paper
.31 I had figured.

actual .290

tfs2121 · Post by **tfs2121** » Fri Jun 06, 2008 12:55 am

yeah ford figuerd in the rocker ratio to get the valve lift of .480"
.300 x 1.6 (rocker arm) = .480" of lift at the valve.

you will have to use a degree wheel to find the duration if you dont know for sure what the cam is.