Hello, pretty new to the honda world and this forum, sorry if I make a noob mistake. Anyways, I spent a decent amount of time on google looking for what cams are in my 89 PR3-4 b16 head, I searched and searched and really couldnt find any pictures or info that matched mine . The only reason I'm curious about them is because I want to make sure they are at least B16 manual cams and not automatics. I've heard the b16 auto cams are toned down on durations to compensate for the auto tranny. I've gotten mixed answer so if anyone could help me that would be great. The intake came had F 1 stamped on it and the exhaust cam had J Y stamped on it, not sure if that helps. Heres some pics of the rings and the thread I try to match them too.

heres the thread I was trying to match them to:
https://honda-tech.com/forums/tech-misc-15/how-identfy-gsr-b16-cams-555399/

 

those look to be auto cams

 

Those dont look like my obd1 b16a cams, Mine have a ring on the outermost part of intake cam where the keyhole for dizzy is

 

Does anyone even know if these markings mean anything as to what grind the cam is? I've seen a lot of threads talk about cams having a groove or not having a groove and different letters and numbers cast in them but nobody seems to have measured these cams to try to correlate the numbering to a certain grind. A lot of times numbers like those cast into a casting are date stamps. Does anybody have info on this?

 

check here http://www.ff-squad.com/tech/temp/VtecCams.htm

 

Thank you. However, that site doesn't seem to give any information about the specs of the cam, just it's external markings. Cams can look identical yet have completely different profiles. I would suspect they changed the profile for different years because as emissions laws get more strict they have to change something and a lot can be done for emissions with cams.

 

is the crossover kinda tame not real loud?

 

ttt

 

yea the crossover is weak, barely can hear it, and the car has no top end power and I mean none. Had lots of mid-range power though, I just pickup a set of GSR cams and the middle lobs are noticeably bigger just by looking at them lol but another funny thing I went to go match the GSR cams to that link Anton Lavey gave above and they aren't on their either lol

 

did a little more research, apparently the 96+ GSR cam has the same ring patterns as a B17a, and I know for sure these are GSR cams because I pulled them out myself from the stock GSR lol but as far as those b16 cams I have go, I still cant find what they are, but $50 for a set of GSR cams should be worth it esp. if they are the automatic cams

 

yeah those cam end markings look to be B17A cams according to this photo of mine below:

B17 cams do have a weak cam profile, comparable to JDM 1st gen B16 cams which are pretty weak profiles. The JDM 1st gen B16 auto cam profiles are even worse/weaker profiles joke as some of you know - the VTEC lobe lift is no higher than the secondary lobes! just terrible Honda!

Any 94-01 GSR cams have a better profile than those B17 cams and $50 isn't bad for a set.



Btw, the best end-user way to compare a set of cam profiles is to compare the lobes from side to side like this:
http://ff-squad.com/tech/cams/dc5rvs06tsx/06.jpg
if you look quickly back n forth from each cam lobe's profile to the next, you'll see how the profiles differ. One set has more height (more lift) on the smaller lobes one set has wider lobes (more duration). It also helps if you have access to a mic to measure the height, but usually you can visually see the differences side by side. In the photo, those are a pair of K-series cams, but you can use the same compare method on B-series cams.

Also, the best OEM Non TYPE-R B-series cams are 94-01 GSR cams.

 

I also need some help. I have 2 b16 motors with different cams. Vtec side has a marking of M and it looks about 1mm higher the the second set. Exhaust side has an L

The second set vtec side has a G Z. Exhaust side has F P. The key hole is deeper then the first set.

Both set has only got 1 ring on each cam at the end.

Does anybody know abything about thease cam? Are they stock or