I want to hear your feedback and see your dynosheets if t is possible. Especially of 5 and 6 cams. They state 250HP and 235TQ for Spec 4 cams, and 268HP and 233TQ for Spec 5 cams on their website. And i wonder if these numbers have something to do with reality? I also want to see dynosheets to know if my B20Vtec will handle such revs at which these power and torque gains are achieved.
Actually I want to Know the same things about Skunk2 Pro2 and Pro3 cams.

 

same ?'s

 

I have run BC 5's and Pro3's on the same engine a few hours apart. Both must be seriousy checked for clearance and degreed properly, they are not "drop-in" The Pro3's made 6 more BHP at the top and 8 more lbs. ft of TQ mid-range.

 

We've used BC5's in a number of builds. They are very easy to tune and make gobs of topend power. Just make sure you have enough compression to support a big cam such as the BC5's, as in 12:1 or more, otherwise stick with a smaller cam, because a smaller cam such as BC4 or JUN 3 will make more power everywhere with less comperssion.

The Pro2's and Pro3's shouldn't be used unless your tuner has experience with tuning these cams. The process to get them to idle good is tedious, however it is possible. But same story applies here, you will need at least 12:1 compression to use the Pro2's to their full potential, and over 13:1 for the Pro3's.

Cliffnotes, unless you are running over 12:1cr, don't bother with these cams. Pro1's, BC4's, M22X, JUN 3's, are all plenty big for a 2.0L with less than 12:1cr.

 

with the pistons i already ordered and my cylinder head there would be more than 12:1 comp. so which cams would you guys recommend? BC's 5 or Pro3? Notice that i don't have person with experiece of tuning skunk pro2 cams, although idle is not too important for me cause this won't be my daily driver.

 

If you want nutt-busting topend, the BC5's should be your first choice.

I will be playing with a set of Pro3's within the next two weeks, so I don't have any firsthand experience with them yet, but I love my Pro2's, the midrange is ridiculous.

It is up to you. I don't think you will be dissapointed with either.

 

just took a look at these cams specs once again. BCs 5 are 312, 12.8 (intake) and 306, 11.8 (exhaust) and Skunk2 Pro2 are 270, 12.8 (intake) and 276, 12.0. these cams have almost the same lift but BC have longer duraton. how come that Skunk2 achieve the same results with shorter duration? I'm still wondering which cams would work better on B20Vtec? And I'm still curious if it is really possible to acheive 268Hp with BC5 and that's why I was asking for dynosheets

 

Are they measuring the duration from the same point of lift? I doubt it.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 87sivtec &raquo;</TD></TR><TR><TD CLASS="quote">Are they measuring the duration from the same point of lift? I doubt it.</TD></TR></TABLE>

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by DonF &raquo;</TD></TR><TR><TD CLASS="quote">I have run BC 5's and Pro3's on the same engine a few hours apart. Both must be seriousy checked for clearance and degreed properly, they are not "drop-in" The Pro3's made 6 more BHP at the top and 8 more lbs. ft of TQ mid-range.</TD></TR></TABLE>

they are both good choices but you seriously have to know how to degree them in and check clearances very carefully

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by xQB21x &raquo;</TD></TR><TR><TD CLASS="quote">just took a look at these cams specs once again. BCs 5 are 312, 12.8 (intake) and 306, 11.8 (exhaust) and Skunk2 Pro2 are 270, 12.8 (intake) and 276, 12.0. these cams have almost the same lift but BC have longer duraton. how come that Skunk2 achieve the same results with shorter duration? I'm still wondering which cams would work better on B20Vtec?</TD></TR></TABLE>

Advertised duration can be misleading. It depends on what valve lift the duration is calculated. Even when comparing 2 different camshafts with same amount of duration measured at 1mm lift, one can be more aggressive than the other. It depends on the ramp and how much lobe area. To have a good comparison, camdoctor graph will be more useful. Too fast opening and closing ramps open and shuts the valves quicker, ie more 'aggressive', but the valves are ramped shut too quickly and this may even cause valve bounce and wear and tear will become severe.

The Pro3 is probably the best cam in the market now, but the bottom end and cylinderhead must support the camshaft by moving enough air to enable the camshaft to reach its true potential.

 

that what i'm going to be busy with as soon as i get the cams.
thanks a lot Suzukii - very useful info

 

what about toda killer vtec?

 

Gets ride of vtec from what I understand. Instead of having a seperate "powerband" that comes on when vtec engages its just one nasty *** powerband throughout the whole rev range.

I personally will be using Crower 404s w/ 11.5:1 comp. But I'm non-vtec so excuse my cams.

 

so wat everybody is basically sayin that low and mid range wise buddy clubs dont make as much power as the skunks or am i readin this wrong...

and people have had tremendous luck wit the pro3s they make power everywhere ive seen dyno sheets and many cars run on them but they put alot of stress on daily driven motors i guess thats probably why everybody who daily drives goes pro3s or buddy club 4s

me personally if im goin to build it i wanna drive whenever i want and not have to worry about gettin race gas so continue because i to am lookin for a cam that will feed all my needs lol

 

good stuff

 

I'm really interested to see what my BC V's are going to do. Especially with the "Nutt Busting" Top end. I'm not giving 2 ***** about low end power on a Honda.