integrawillie

Before I ask just a few questions, I want to say that I have searched to the best of my ability, and all I can seem to find is hearsay about a friends cousin and his VTEC kickin' in hard. Between this, and even being able to find any info due to about 10 different designations for these cams (skunk2stg3, s2s3, tuner3, etc), along with the pro series being labeled 1,2, and 3, it's just been a pain. I am looking for just a couple simple answers/suggestions.

Seup is :

84.5 B20 vtec
RS Machines ITR reps w/ floating pins
Eagle rods
Stock stroke
Stock thickness head gasket
GSR head
Stock valves

I've found an exceptional deal on these cams, and would love to get some answers/suggestions. (I'd be a liar if I said this engine/trans setup wasn't somewhat budget oriented) So from what I can see on the specs, and what I've found so far, it looks like the primaries are very mild/near stock for most of the B series VTEC cams. The VTEC lobes look to be comparable to the PRO2 and 3 cam, though? (I could completely be reading this wrong). Will this cam actually HURT my power? I think I can live with the mild midrange for the deal I get on the cams. Really, the only thing this car will do is drive to work and back occasionally, or get thrashed to it's limits on weekend and at the strip. I estimate my compression around 11.8ish:1. Do I need to worry about any compression bleeding off with these? As far as an intake manifold, with the mild midrange, I'm assuming a Victor X is a horrible option? Maybe something along the lines of a Performer or possibly even a Skunk2 Pro Series? I currently have an Omni 70mm throttlebody laying around. Will something like this be too much? Any comments/suggestions are greatly appreciated. Try not to flame too bad, please. If I have missed a thread or answers somewhere, feel free to post them up, and I apologize in advance.

Thanks a lot guys!

Blink330

in for this also, considering these cams for my car

98vtec

you cant eyeball a cam shaft and say they look comparable.

the tuner series will make power nothing like the pro series. the tuner series run a stock primary lobe where as the Pro series run a modified primary. the peak height of the lobe is just that, the peak height. You have a whole slope of open and closing ramps that have to be considered and will effect the power output greatly.

integrawillie

I'm not sure if you are meaning visually looking at cams, or looking at the cam specs. I understand visually you can't tell how a cam performs just because it looks a certain way. As far as the cam specs on Skunk2's site, the big difference between pro and tuner series looks to be duration on all the lobes. I understand duration at different degrees = valves opening and closing sooner/later, etc. I understand how ramping works as well. I suppose I may have titled this thread wrong. What I'm looking for is this:

Will the Tuner3 cam be a hindrance to my setup?
I'm assuming that this cam should provide marginally larger gains at least in the top end when compared to an OEM GSR/ITR cam?
If they do help, what intake manifold and throttlebody size would be best suited for this?

98vtec

You are better off with Pro series. If you can deal with less power and generally a slower car and want a simple "drop in" cam. go tuner. The pro series are by far a better design in general though.

Untengijutsu

People are funny.

Pro are not better than tuner series.
It all depend of different factor.

The tuner series is based if not copied from the JUN cams.
S2S2 are really similar to JUN3 and so stage 3 to JUN4.

Pro series is based on the TODA lineup.

Make a search about JUN3, you will find a lot of dynosheet, making lot of power.
Pro series is not a bad cams, they are great but keep In mind bigger cams dont mean more power.

I know IPG made good power on tuner 3, they had a thread about this engine back in the day or contact them. Was like 250+ whp.

I make 223whp on smaller cams than tuner 3 on a 1.8.
My powerband is more powerfull than any 1.8 with pro2 that got tuned on the same dyno, even 2.0l.

Dont tell me my primaries are smaller and these are drop in cams.
When doing V2V they were more tight than the pro2 I had In backup.

These cams are in my sight if I change one day, but as for now the jun3 or similar are good for me.

viperjng

Hi,

I've had the S2 Tuner 2 in my setup for a while and was not impressed by them at all. I took a informed decision by doing my own research and chose DD Tech Cams. Was not at all disappointed and extremely happy with the results. Gained a lot of horses torquey bottom end and pulls strong in the higher revs. They are the ones who will get my business for any future builds from me.

Jignesh

slowcivic2k

VTEC engaging "hard" is a symptom of inferior torque at the crossover point, which indicates poor tuning/compatibility. The whole point of VTEC is to maximize torque for as long as possible over the RPM range.

Simply putting the biggest cam possible in an engine will not yield the full potential of any engine. The camshafts should be degree'd to the pistons, to ensure the valve is opening at the correct time. Adjustments on a dyno can be made from that point, so long as mechanical interference does not prevent you from doing so.

Camshafts are built around a specific purpose, as the size, ramp, and duration of the lobe determines the optimal operating range. If you buy a cam that works around 7k RPM and above, expect less than "ideal" torque below this point.

Dyno time will help you determine weak points and how to deal with them.

integrawillie

Thanks for the suggestions everyone. Jignesh, unfortunately I believe the DD tech cams are out of my price range based on the costs on the site. As good of a deal as I will get on these cams, it may still be beneficial for me to look for a good used set of Pro series cams perhaps.

98vtec

If you make more, better power (not just peak) on a tuner cam than a pro cam (properly sized, installed, and supported), you are doing something wrong. There is nothing wrong with tuner series. But they are old cam technology considering movements in the last few years.

NUISANCE

iTrader: (1)

The link to my build is below. I have about 2k miles on this build and I am more than happy with the cams. Making that much with a stock short block and a built head is pretty damn good I think. Getting around 27mpg too.

https://honda-tech.com/forums/showth...light=nuisance

89si-rex

With that displacement and compression I'd recommend the pro 1. Give Brian a call at skunk2. He will be more than happy to help you. He helped me out when I was choosing cams for my build.

93egSLEEPER

I would rather run the Pro 2's over the tuner 3's on this motor, especially if it is a DD. The additional torque and low end provided by the primaries is awesome for around town. A buddy of mine did a comparison on an LSV with tuner 2's vs. pro 2's. The pro 2's DID peak sooner and did not carry power to 9k like the tuner 2's, but it made 2whp less 700rpm sooner and carried it up to 8700 on a flatline before falling off. The tuners had no flat line and just peaked and the 2whp more they made was 8600-9k His car ran .3 and 1.5mph faster on the pro series while making 2whp less. It had a much more linear torque curve and in the mids showed up to 12whp difference. Its was an 81.5x89 w/ P30's. Don't let people say the idle and drivability suck, if it does, find a better tuner. Just food for thought.

integrawillie

Well I ended up purchasing a set of used Pro2 cams this weekend. After reading several graphs all over this site it just seemed like a great choice for the setup I have. Trying to determine which intake manifold to run at this point. I see a lot of VictorX and 70mm throttlebody setups, but they all seem to either be higher compression, and/or have port work done to the head. Not sure if the Victor will shift my power up so much that it starts to hurt the midrange. Also, anyone have any recommendations for lma? Stock GSR work ok with these?

89si-rex

I run victor x and 70mm throttle body with excellent throttle response. if you go with the skunk2 style (unless it's the ultra race) you'd want a larger throttle body because of it's smaller plenum IIRC.

93egSLEEPER

Look up the professional products IM. $180 shipped and its designed for the GSR head. I'm going to run it on my B20 build also.
I'll give you the link and everything
http://www.ebay.com/itm/360789904402...84.m1438.l2649

legoina

What is the marking on your k20 s2 sage 3 camshaft?

negusjuda

i have tuner 2 in my setup now and in my b20vtec when i had it in my old teg and the low end and midrange wasnt really impressive at all all the power was in the 6k rpm and up range with peak power ending around 8100 rpm my new setup will be with pro series

93egSLEEPER

Get a set of the skunk2 LMA upgrades and never worry about them again. Its less than $120.
Like I said in my post earlier look into the Professional products ITM w/ a 68mm TB. It will give you the best of both worlds by keeping mid range but allowing it to breathe up top. The victor x is complete overkill for any street NA build.

integrawillie

Thanks for the recommendations sleeper. I purchased the Skunk2 lma's. Parts coming in slowly but surely. Hopefully it's in and running by Feb or so. Have a lot of things to buy still to get the setup into the car.