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    RDsport Step 2 S65 Cams - 294 degree

    I have seen no details posted on these cams. EAS lists them on their site here: http://www.europeanautosource.com/pr...oducts_id=3590

    The weird thing is, they aren't even listed on RDsport's own site, only the step 1 288 degree cams are. Also, nobody seems to be running these as there has yet to be any feedback or dynos. Do these things even exist?

    These seem to be pretty aggressive as the Schrick Stage 2 cams are 292 degree. Would like to get more details on them.

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    interesting, what are typical gains with cam upgrades on this motor? Im guessing youll need a tune too.
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  3. #3
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    Click here to enlarge Originally Posted by DBFIU Click here to enlarge
    interesting, what are typical gains with cam upgrades on this motor? Im guessing youll need a tune too.
    +1

    Anyone have info?
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    Click here to enlarge Originally Posted by DBFIU Click here to enlarge
    interesting, what are typical gains with cam upgrades on this motor? Im guessing youll need a tune too.
    No idea, Schrick does not claim any power numbers either except saying that aftermarket cams on this motor are a great benefit.

    Stage 2 or 2.5 E9X M3 S65 V8 supercharger kit for sale
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    Click here to enlarge Originally Posted by CookieCrisp Click here to enlarge
    +1

    Anyone have info?
    That's what I'm looking for, but nothing so far.

    Wondering if these would help a supercharged application?

    Stage 2 or 2.5 E9X M3 S65 V8 supercharger kit for sale
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    Click here to enlarge Originally Posted by Sticky Click here to enlarge
    That's what I'm looking for, but nothing so far.

    Wondering if these would help a supercharged application?
    Aggressive cam overlap and duration will hinder supercharger performance because you will not be taking advantage of inertial air packing that the cam is designed for, instead youll be blowing boost out the exhaust valve.

    Lift on the other hand, all boosted motors can benefit from lift.
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    Click here to enlarge Originally Posted by DBFIU Click here to enlarge
    Aggressive cam overlap and duration will hinder supercharger performance because you will not be taking advantage of inertial air packing that the cam is designed for, instead youll be blowing boost out the exhaust valve.

    Lift on the other hand, all boosted motors can benefit from lift.
    Ok, so to make it simple, will these cams help a boosted application?

    Stage 2 or 2.5 E9X M3 S65 V8 supercharger kit for sale
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    1 out of 1 members liked this post. Yes Reputation No
    Click here to enlarge Originally Posted by Sticky Click here to enlarge
    Ok, so to make it simple, will these cams help a boosted application?
    In my opinion they will hurt a boosted application. Stock cams for a boosted application are best.
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    Click here to enlarge Originally Posted by DBFIU Click here to enlarge
    In my opinion they will hurt a boosted application. Stock cams for a boosted application are best.
    Excellent.

    I guess they would have to be SC specific cams as I assume the stock setup can be improved for boost.

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    Click here to enlarge Originally Posted by DBFIU Click here to enlarge
    Aggressive cam overlap and duration will hinder supercharger performance because you will not be taking advantage of inertial air packing that the cam is designed for, instead youll be blowing boost out the exhaust valve.

    Lift on the other hand, all boosted motors can benefit from lift.
    This is so true. I've heard multiple complaints from Corvette owners who combine a lopey NA cam with a supercharger and wonder why they aren't making the advertised boost.

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    1 out of 1 members liked this post. Yes Reputation No
    Click here to enlarge Originally Posted by Sticky Click here to enlarge
    Excellent.

    I guess they would have to be SC specific cams as I assume the stock setup can be improved for boost.

    'Usually' in the domestic game, boosted cams have a greater Lobe Separation Angle (LSA) between 112 and 116 but most of the time no less than 110 degrees.

    Have very conservative overlap figures, overlap is not always need for boosted motors unless they are making a lot of power and are designed for that.

    And, lots of lift.

    I am pretty sure with the S65s advanced cam phasing, you will not need to $#@! around with the pseudo LSA (because that is what the phasing essentially does, makes it for infinitely adjustable LSA essentially) and overlap from the stock cams is fine IMO. Unless someone can prove otherwise, looking at the stock dyno of the S65, the cams are doing quite a good job of letting air into the engine. For boost, I see no problem with stock cams.
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    Click here to enlarge Originally Posted by DBFIU Click here to enlarge
    Unless someone can prove otherwise, looking at the stock dyno of the S65, the cams are doing quite a good job of letting air into the engine. For boost, I see no problem with stock cams.
    They do an excellent job, same with the S54. HPF on their top kits does not even touch the cams or heads.

    The thing is, what if you want to shift the powerband a little to the right?

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    Click here to enlarge Originally Posted by Sticky Click here to enlarge
    They do an excellent job, same with the S54. HPF on their top kits does not even touch the cams or heads.

    The thing is, what if you want to shift the powerband a little to the right?
    Headwork.

    Cams are usually done last.

    I wouldnt touch your heads or cams if you intend to boost. Maybe port matching and a little bit of port cleanup but I see no need, NA heads always respond well with boost, because they are designed to flow as best they can.
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  14. #14
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    Click here to enlarge Originally Posted by DBFIU Click here to enlarge
    I wouldnt touch your heads or cams if you intend to boost. Maybe port matching and a little bit of port cleanup but I see no need, NA heads always respond well with boost, because they are designed to flow as best they can.
    This is my argument for why the S65 is a better platform since it is so much more efficient per pound of boost, due to the heads being so damn good to begin with.

    I'm just wondering how much they can be improved and have actually been speaking with Bavarian Solutions about this.

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