How much HP will I get from BC camshafts?

[shawnm565]

Well Iv just started moding my TC and I plan to get a turbo set up in april, but I was thinking before I do that I should update my cams, springs & retainers. So Iv been trying to look online how much HP the cams would give me and I was also wondering if you guys think its worth it to update them? or maby I should get something else before I get my turbo?

[navylife59]

Actual HP increase is unknown and depends on your setup. Expect no more than 20WHP increase on an engine with I/H/E from it's current WHP level. Benefit? Yes, any increase in lift and duration will increase performance. How much will strictly depend on your mods.

If you are going force F/I then you will need to get the Stage II F/I cams.
Installing these cams before your turbo setup could have some issues as they are profiled with minimal valve overlap which is beneficial to N/A operation. You motor will have lower vacuum and possible rough idle. Depending on your turbo kit, you may have a pre-tuned piggyback controller. If these cams are installed when you install your turbo, it will throw the tuning maps off and could result in irradict behavior or engine damage. This is not a problem if the install is done at a tuner shop as they can adjust the piggyback controller to compensate.

I have my cams installed in my machined head awaiting for install in the new year. I went with a full 1mm oversized valves which I highly recommend for your turbo setup. Can't wait to try mine out.

[shawnm565]

Now im still a pretty new at all of this so if I wanted 2 do what you suggest would I need to get machine work done on my car or would I just have to get new piston's and rods? for the oversized valves. Im kinda working on a OT budget ha so its based on how much of a hermit I want to be ha but I guess in minnesota going out in -20 weather doesnt seem 2 eventfull ha.

[navylife59]

No machine work or piston replacements need for the camshafts. You don't have to upsize your valves, but if you do then the valve seats will have to be machined. Jotech can have your head fully CNC ported, polished, oversized valves, portmatching, and finally assembly done for around $1,500 which is an awesome price for the work. That is minus parts of course.

Nothing has to be done to your lower end unless you want to go beyond 300WHP. The stock lower-end can run up to 400WHP but only under good engine management.

Replacing the cams is not easy on the 2AZ-FE with the motor in the car. You pretty much have to have it on a lift, drop the oil pan, remove a motor mount, and remove the accessories just to get to the timing chain cover. All of this in a very tight space. You will need a completed set of lifter buckets to obtain the proper zero valve-lash. It is better in the long run to remove the motor and have a professional head machine shop setup the head.

[shawnm565]

[QUOTE=navylife59;24582]You will need a completed set of lifter buckets to obtain the proper zero valve-lash. QUOTE]

Can you explain what that means sorry confused about that if you dont mind.

[navylife59]

The 2AZ-FE is a dual-overhead cam head that utilizes a push-rod less and rocker-arm less, direct lobe to valve design thru solid lifter buckets. This provides for zero need for adjustment once the original zero-lash has been established via different size lifter tips. With fewer valve train components, there is less friction, less play, consistent performance, and cheaper costs. These lifter buckets serve a second purpose as a wear surface between the valve tip and the camshaft lobe.

[shawnm565]

Okay so who sells the Valve Lifter Buckets? I googled for the TC and no results.. and on there site they say it only require springs & retainers?

also ty for awnsering my questions so well

[navylife59]

These will have to be purchased at a Toyota Dealership. Not sure on price, but you have to know the exact sizes that you need for each valve. Chances are that you will be able to reuse some that you have. This is why a professional head machine shop is worth the money as they can mill the valve tips a slight bit to make up the difference. And they most likely have a set of these.

[shawnm565]

So I contacted the dealership, they are $16.50 each so thats not 2 bad, But what is the reason why you cant used the existing ones?

Any other parts that would be needed 2 do this? I guess I kinda want 2 do it my self just to learn about my car but if I really cant I wont.

[navylife59]

Adding a new camshaft or other valvetrain components will require different size lifters to bring the valve lash to zero. If you were to disassemble your head then reassemble with the same components, then you would not need to adjust for valve lash. Adjusting for zero valve lash is critical for piston to valve clearance in some engines and for proper combustion timing.