hey guys am building my turbo set up with a b18c using a 6262 turbo ..am stepping up with head works and i already bought some skunk2 tuner series stage 2 cams and i wanted to know if these are drop in cams or do i need to buy skunk2 cam gears ...thanks

 

Wow. that's pretty large. the bigger question is whether or not it is best to use them for turbo setup. it's one thing to use a slightly aggressive NA cam like a Pro 1 for larger turbo applications like you have, but Tuner 2s? Look at your HP goal and need before asking about cam gears.

But the short answer to this question is yes, cam gears are needed for these with a turbo setup. I recommend matching the gears to the cams.

 

whats large the turbo or the cams? jeff evans uses tuner 1 cams with out a cam gears so i was checking to find out if the tuner 2 cams work the same. power goals are not that high prob 500whp...bought the turbo because i have another sleeved block to transfer the turbo too when that block is ready as my current block is unsleeved..

 

The cams are large, is my point. the turbo is fine. Tuner 1 cams are slightly above Type R cams and are relatively easy to use software to tune out. It's not known exactly with Tuner 2s, but they are a MUCH more aggressive cam.. Software can only do so much without physical change in overlap.

 

well............. they are already in the car ..got a blox cam gear in there also.we are gonna be tuning tomoro so i would let you know.

 

In for results

 

i ran these cams with excellent results, they arent THAT big. you are going to need cam gears for these cams. you need cam gears even for ITR cams to see the best results.

 

im confused i thought B18C's are sleeved blocks stock with 81mm sleeves

 

No sir. The only CLOSED-DECK block from the factory were the old Preludes from 92 (limited) other than that, no Honda block came as a closed-deck or sleeved.

 

Cams make awesome power man, dont think they are too big

 

The Tuner 2's have more overlap than stage 1 camshafts which can introduce more turbo lag, as well as force the turbo to spin harder to make the same amount of boost as you are bleeding boost pressure out the exhaust valves on the intake stroke.

We actually have seen customers make great power with Tuner 2's so long as you are running a big twin scroll setup. If a little bit of lag is no issue, and the turbine is big enough that the pressure bled off due to overlap is very small in proportion to the amount of air the unit can move then it actually works quite well.

Central Florida Turbo LOVES running Tuner Stage 3's on big boost B's.... (dont ask me how or why haha).

Just thought i would throw in my .02

 

i've never seen or even heard of stage 3's
i didn't know they existed

 

there big .... real big

 

i mad 802hp on 37psi at 8,700 rpm with tuner2 and the motor was asking for more boost

 

I have wondered if my tuner 3s would work good with the s372r or not. That's nice to know someone reputable like cft uses them!

 

I have the tuner stg2's in my setup and they seem to work fine. 10:1 compression 81.5mm gsr with a portflow head and a t3 60-1 .63 turbine housing turbo made 520whp@ 21.5psi on 93 octane. Even on wastegate (10psi) the car made 400whp. Here is a dyno with some worn out rings on stock sleeves. I dont have the dyno of the car after the rebuild and degreed in cams. But you get the idea. With the rebuild and going a little more aggressive with the boost the power obviously started coming in a little faster as well.
This should give you an idea of the powerband, going to 10,000 in 3rd gear.

 

I chose to go with the Skunk2 tuner2 cams, havent gotten tuned yet, should be in a couple weeks or so but deff a good cam go to with.

 

Has anyone compared tuner1 to tuner2 cams on a turbo setup?

 

In for results

 

how much overlap do the tuner 2 cams have in comparison? I've tested big overlap cams on the dyno and the larger overlap seems to have better spool and mid-range. I know that the turbo sizing will impact the cams to a very large extent, and my results were with a GT3076r. The lower overlap cams lost mid-range and picked up top end after 7500rpm.

I think big overlap cams can work very well on certain setups. Getting the boost/backpressure ratio close to 1:1 and monitoring this is key imo. Testing, testing, testing.

 

Whats Theshodan is saying is with cam gears you can tune out the overlap of the cams and they will work just fine and make good power.

My question is and sorry to thred jack but can a standard set of aftermarket valve springs like omni or supertech handle these tuner stage 1's or stage 2's ? i know with the pro1's you need higher seat pressure than an off the shelf supertech correct? Im currently running itr's but i think this winter im stepping up the game and going for more power so thinking about upgrading cams

 

Depends upon the turbo. The Tuner1s are suited more for turbos like yours; 49lbs/min-56lbs/min. The Tuner 2s are a bit like the Pro1s, where they are for over 61lbs/min +.

Not an apples to apples comparison.

 

Tuner2 cams have identical lift to Pro1's but different overlap. I thought the issue with backpressure was the overlap not the lift.

 

I've tuned quite a few Tuner 2's on medium turbo setups (GT30R, GT35R, T3/T67).. In general, they have too much overlap if the turbo setup doesn't breathe well enough.
If the turbo and engine setup is efficient, they make power and often surpassing any Stage 1 cam or even Pro 1's.

Suggestions would be to run at least a ramhorn or a topmount manifold, adjustable cam gears, and static compression ratio should be 9.5:1 CR or higher. Just like an N/A motor, a boosted motor also requires compression to suck and push to properly run bigger cams with more overlap. It is the higher compression that continues to suck and push airflow through the turbo, rather than having it choke back into the motor especially when peak overlap occurs just when the turbo is about to hit full boost.

 

I am wondering what cam I should go with. I was thinking of using tuner 2's but after reading all this it has me thinking differently. Setup consists of t3t67ho .82, inlinepro T4 mani, victor X, 68mm tb, 2.5" charge piping, and full 3" exhaust.