How to Measure Camshaft Lift

[@redwolfmaddox3986]

Had to engrain this into my head for my final hands on assessment thanks!!!!! I passed with an A in the class!

[@writtenpieceopaper1]

Thank you so much for explaining it so simply. I'm having problems keeping up with my engine repair class. Your explanations are right to the point and easy to follow. I also love the high quality video shots.

[@martinbuilt]

You are welcome, glad you liked it 👍 😊

[@richardbartlett4075]

Well done and to the point. I have a motorcycle repair shop and I just came up with a cam that I can't find even the manufacture. This helped considerably. Now I can try to get the valve stem protrusion, I hope. Thanks

[@martinbuilt]

Thanks Richard, glad you found it helpful, good luck in your search.

[@guidosarducci3047]

Dude! Thank u. One of the best posts I've come a cross in quite some time.That was concise & easy to under stand. Was able to check my cam & help me decide what my next cam will be. I liked & subbed.

[@Ali-nb1tx]

Very well explained, but how will we measure valve lift if the cylinder head is valve bucket type?

[@trillrifaxegrindor4411]

thanks,i just found the roller cam i pulled out of a recently acquired tpi sbc is essentially the same as the roller cam i was going to install because of this wonderful "math".one is a billet core and the other is cast,two different manufacturers but virtually identical lift.now i need to figure out lsa,duration etc to pick the better cam.

[@martinbuilt]

Glad it helped

[@stevendurieu6938]

I just come across your vid i feel i can go check my ford 351 cam thanks 👌👍

[@martinbuilt]

I'm glad you found it helpful 👍

[@Rapsgarage]

Thank you

[@martinbuilt]

You're very welcome thank you for watching.

[@danhambrick6331]

Nice job Martin,now send me those camshafts...lol...

[@martinbuilt]

Lol..I just scored that set of ebay for $130.00 shipped to the door. I feel like I stoled them..

[@abdulrahmanshanouf8664]

This is great information, but how i can know the ratio?

[@martinbuilt]

That is something you're just gonna have to look up. The ratio of your rock arms should be a standard thing for your engine. Thank you for watching.

[@johnjaydizon4101]

Paps itatanong ko sana kung ano ba standard/stock lift ng Wave 100 at Wave 125 maraming salamat po.

[@frankieguevara9807]

I know it's out of subject.but what do you think about cutting the transmission management wire.

[@martinbuilt]

I have done that. There is a trimmer shift in the upper RPM range.

[@frankieguevara9807]

@@martinbuilt ok cool.thanks for your quick response.

[@hoffa2586]

Ok how does one determine the rocker arm ratio if I dont have rocker arms?! 1984 Volkswagen rabbit GTI with solid lifters.

[@dirtcheapmedia3390]

Wouldn’t it just be whatever your love lift is then?

[@thatboysims3k879]

LEGEND!!!

[@chickenfoundation9323]

What about finding out the max lift you can get before valves hit piston

[@martinbuilt]

You could use clay on top of the pistons with the cylinder head bolted into place and then rotate the engine. Remove cylinder head and measure the depth of the clay.

[@roobear5357]

Nice video

[@DANEMSPRINGER]

What was the difference between the 08 cams vs 99-04 HO Cams? Im assuming you upgraded from the HO Cams to the 08.

[@martinbuilt]

The 08 cams have .030 more lift intake and .043 more lift exhaust then the HO cams. I don't know the numbers for the duration. I believe the lobe separation is 112* HO and 114* on the 08. I have not yet got around to installing them.

[@DANEMSPRINGER]

@@martinbuilt ah, thanks for the reply martin. Look forward to watching a video of the installation of the 08 cams! Don't forget to take us on a ride along when you get done sir!

[@martinbuilt]

@@DANEMSPRINGER Yes I'll do a ride along. I'll also do a 0 to 60 mph test between the 2. I don't know if I'm going to do any Dino tests, we'll see.

[@gecko.5698]

Hai martin, how this thing relate with ignition timing? Im actually try to compare it with my motorcycle cam.

[@martinbuilt]

Yeah this video isn't going to help you much as far as figuring out ignition timing. It's mostly just how to figure out how much lift your cam has. But thanks for watching in commenting.

[@goodenoughgarage7749]

Where do I find the Rocker Arm Ratio for a 283 GM motor?

[@martinbuilt]

The OEM rocker arm ratio for a 283 Chevrolet should be 1.5:1

[@micthegreasemonkey2918]

hi martin i alraedy know my intake lift is 564 & exh lift 534 thats whats on my cam card my r/ratio is 1.6 i hav measured both int & exh lobes & got 334 intake & 354 exh so if i multiply by the rocker ratio of 1.6 i get 534 intake & 564 exh the exact oppisite to the cam card im no engine builder but does this mean the grind on my cam is wrong?

[@martinbuilt]

I would be surprised if the cam card is wrong. Are you sure when measuring a lobe that it is what you think it is, you're not getting the intake and exhaust mixed up? If you're positive then the cam would obviously be ground incorrectly.

[@micthegreasemonkey2918]

the card is correct comp cams hav a similiar cam with the same numbers now for the lobes my cam i think its intake ,exh exh intake & so on not sure about other cams ive got a v6 gm 3800 2000 model.

[@martinbuilt]

@@micthegreasemonkey2918 sounds like you understand which lobe is what sometimes it does get confusing

[@josedomingoalbornozlopez308]

Greetings friend, can you help me with the technical information of this cam since I do not get information (ss-310-nc crane)

[@martinbuilt]

I think I found some info 310 adv. duration, 236 @ .050", 114L/S, and a.485" lift.

[@smsm7ossam]

Thanks But I don't know how to know my rocker arm ratio!!! :))))

[@martinbuilt]

what make and size is the engine?

[@aleagledeer1568]

Go or tell the like bk in the 60s or 70s like 7/8 or 3/4 we say cams