So my buddy bought some of these cams and I need to know the spec do I adjust the valves. He has aftermarket dual valve springs and titanium retainers. with a port and polished head. The head is on a b20 block are these cams going to work with this setup?

 

seems like you should have done your research before you bought them

 

As stated in his post, he did not buy them his friend did.

 

Yeah I just installed them. I went to sk2 site and the specs were .oo7in and .008eh. I adjusted the valves and it fired right up. Now it runs fine until vtec is supposed to engage then it breaks up and wont rev out.

I told him it needed to be tuned asap because hes running a base map from jon vega for a stock b20vtec with gsr head and cams

 

Yeah pro2 cams are MUCH bigger than GSR cams. Also did you degree in the cams? He is breaking up obviously because he is running so lean. If your friend isnt careful he will pop that motor lol.

 

Pro2 cams won't run on a base map for GSR cams. You sure they are not Stage 2?

 

I heard about degree them in he got adjustable gears with them what should I degree them too? The end of the cams say p2t on both

 

Search the all motor thread or start a thread there. IMO, if you don’t know how to degree cams, just pay a shop or someone knowledgably to do it right. Should have been done before you started driving it. Also, if all you have is a generic base map, you should not be engaging vtec or doing any hard driving. A base map is just to get your car running good enough to get it to your tuner.

 

I really hope you're not using any skunk2 cam on a stock b20 bottom end

 

Well that is what cam he chose to get I tried to tell him diffrent but he didnt listen.
I called sk2 and they told me how to degree in the cams. Columbia is going to yune it this weekend and hes not doing any hard driving wit the car

 

This constitutes as hard driving in my book especially with port and polish head, cams, etc. If he does not baby it, he will probably cause some damage if he is not careful. more air + less fuel than needed = boom.

Just saying in general. If he wants to continue to drive it over the week until he gets it tuned, would def recommend asking the place if they can give him a basemap that will satisfy those cams for a short time. I would recommend he stops driving it though IMO.

 

what pistons are in the block???

 

Its a stock block Columbia is going to street tune it tonight until he can afford dyno time. Thanks for all the help h-t.

 

Get ready to bend valves. Good luck on the rebuild. Should have done your homework before installing these cams on his motor. He'll probably be mad at you when he either breaks valves and destroys an entire motor or just bends valves.

 

No he wanted it done all i did is the work and install so its all on him

 

Why would it even bend valves there should be more than enough piston to valve clearence

 

Stock valve reliefs on a non-VTEC block are 31mm IIRC. VTEC valves are 33mm. Skunk2 Pro2 cams are huge and will probably make those valves kiss pistons when they cross over into VTEC. Correct me if I am wrong, but I'd recommend that you stop your friend before he hits the dyno. I bent valves with ITR cams, I'm almost positive your friend is ****ed with the Skunk2 cams.

 

This will end poorly.

.Manny is probably right about a valve train make out.

People really need to read before they buy things.

 

Will not end poorly if pics of carnage are posted. I will Laff

 

Update?? Did your friend's motor grenade?

 

Nope sure didn't just very slow. Not enough supporting mods for the cams. We had no issues with piston to valve clearance at all. We are going to put the gsr cams back in it and columbia is going to retune for now. dudes going to start buying things to build the block.

Columbia even said that we can get 12:5:1 cr pistons and still not have to worry about p2v clearence

 

wow! Very lucky. You won't have any issues with after market pistons because they are designed to accommodate bigger valves.

I'm looking to get a set of Pro2 cams as well for my setup. Can't wait, I want to see how much more power I can squeeze out of mine on pump gas. If your friend is on a budget, tell him to give the RS machine ITR pistons a try. They are a great budget build piston. There are a ton of guys, including me, that have used that slug and had great results. Check out the All Motor section too for more tips. GL

 

Thanks yeah he wants to do a low budget bottom end build for his b20. I told him use the internet and do a little more research before you going buyings parts. Or just leave it up to me to order them. lol

 

The car is very slow? Stick a compression tester on it and see what it says. I hope you had the cam gears set with a 4 degree seperation and not 0-0 or V2V contact will happen as well.

 

Yeah it literally would slow down went you went into vtec. I had the cams set +4*ex and 0* in from skunk2. Columbia tried to tune it like that and said it wouldnt work so he changed it to +2*ex and 0*in. Took it home and put the stock gsr cams in it. Homeboy traded the pro2s for tuner series stage 2