anybody have any experience or suggestions in using either of the BC spec IV vs. the S2Pro2 cams on a 12:1cr motor. im debating on which one would be most feasable for track and streetability.

 

very intrested also runnin a 12.5;1 comp pro 2s here

 

okay, got one vouch for the S2pro2's anyone got anything to say bout the BC's?

 

BC4's are o.k., the Skunk Pro 2's are better.

 

Three.

 

the pro2's are big cams. the idle is really lumpy but the midrange is ridiculous. these cams make great power all over the rpm range. 12:1 should be just about perfect.

havent had any experience with the bc4, but im sure they dont make as much power as the pro2's.

 

The BCIV is very similar to a S2S2 vtec lobe and the Pro 2 looks to be closely based off the S2S3 but could have completely different ramp angles.

Don?

 

the stage 2's are very different from the pro2's. the stage 2 is more like the pro1 in its secondary vtec lobe, but the pro1's primary lobe is much larger. that is where the mid range lies.

the pro1's, from what ive heard anyways, make more power than the stage 2's. the pro 2's are beasts.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by anothersickhatch &raquo;</TD></TR><TR><TD CLASS="quote">the stage 2's are very different from the pro2's. the stage 2 is more like the pro1 in its secondary vtec lobe, but the pro1's primary lobe is much larger. that is where the mid range lies.

the pro1's, from what ive heard anyways, make more power than the stage 2's. the pro 2's are beasts.</TD></TR></TABLE>

You talking to me? If so did you read my post?

 

Pro1 vs. BC4's. https://honda-tech.com/zerothread?id=1135465

I would expect the Pro2's to kill the BC4's in that motor^^^.

BC4's vs. S2S3's(not Pro).



https://honda-tech.com/zerothread?id=1019995

Don't know if any of this makes a difference but.....

 

not to anyone specifically...just sharing what i know.

 

PRO2's

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by DonF &raquo;</TD></TR><TR><TD CLASS="quote">Three.</TD></TR></TABLE>

Don, that supposed to be a vote for the Pro2s?

 

^nah I'd say it's a vote for pro3's

 

Pro2s has the flatest torque I have ever seen.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by DC-2uned &raquo;</TD></TR><TR><TD CLASS="quote">^nah I'd say it's a vote for pro3's</TD></TR></TABLE>

Impression I've gotten from Don in conversations is that he's not all that crazy about the Pro3s....he's got another configuration that he likes a lot better (in theory -- i.e. he hasn't tested it, yet....so, he won't comment on it). I'd still like to see what kind of #s he gets out of it.

I've him say a lot of good things about the Pro2s, though.

 

who is don?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by anothersickhatch &raquo;</TD></TR><TR><TD CLASS="quote">who is don?</TD></TR></TABLE>

GTFO

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by C_Rock77 &raquo;</TD></TR><TR><TD CLASS="quote">

Impression I've gotten from Don in conversations is that he's not all that crazy about the Pro3s....he's got another configuration that he likes a lot better (in theory -- i.e. he hasn't tested it, yet....so, he won't comment on it). I'd still like to see what kind of #s he gets out of it.

I've him say a lot of good things about the Pro2s, though.</TD></TR></TABLE> That is not exactly what i said. The Pro3's have made the most power over any cam i have tested, if your head and intake can keep up. Iwant to try another combination of Pro's to see if I can keep cylinder pressure up and get a better curve. I have just not done it yet.

 

donf, what are some ways you use to increase cyl pressure..

 

Turbo

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by DC-2uned &raquo;</TD></TR><TR><TD CLASS="quote">

GTFO</TD></TR></TABLE>

whys that?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by IntegraType-R &raquo;</TD></TR><TR><TD CLASS="quote">donf, what are some ways you use to increase cyl pressure..</TD></TR></TABLE> Close the IN valve and open the EX valve where you want it @ the desired RPM.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Natural Aspirations &raquo;</TD></TR><TR><TD CLASS="quote">Turbo</TD></TR></TABLE> Nitro

 

enlighten, retarding the intake cam will make the pressure go up?? i always thought advancing intake cam/ retarding exhaust cam would create overlap, therefore increase cyl pressure.