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any thoughts on CPR 6 manifolds

Discussion in 'V6 Development And Modification' started by commodore665, Mar 25, 2017.

  1. commodore665

    commodore665 expat Saffa

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    hey , I've done a bit of digging , and there seems to be a lot of differing opinions on the CPR 6 manifold , looking at them , it looks like they are better at high revs , and as most people are not going rev their engines that high for long periods , I'm wondering are they a viable option for then way the average Joe Shmo drives .

    any thoughts welcome .
     
  2. immortality

    immortality Can't live without smoky bacon! Staff Member

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  3. commodore665

    commodore665 expat Saffa

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    yeah pretty much what I was thinking too , probably a good support mod for forced induction , but on a N/A engine below 3000 + RPM , not a lot to gain , may look at diff gears then ,

    cheers
     
  4. immortality

    immortality Can't live without smoky bacon! Staff Member

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    I think the CPR6 is probably a great mod for any engine that wants to rev.

    Do you know what the diff ratio is in your car?

    If yours is the 190 with the 5 speed auto they have 2.87 gears in the diff but the 5 speed has a much better gear spread between 1st - 2nd - 3rd unlike the 4 speed auto. Even some 3.08 or 3.45 gears would really wake it up. I do believe the V6 still has the smaller diff fitted so need to be careful there when looking for gears or a diff to swap out. A 3.46 ratio diff from a V8 model would fit but you would need to swap the pinion drive flange coupling over as the V8's have the larger M80 diff which uses a larger coupling than the V6 but I would suggest looking under the car and confirming the size of the doughnut rubber coupling to be 100% sure of what you have or what you need.
     
  5. Sabbath'

    Sabbath' Redblock Jesus

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    Would probably just end up being one of those mods you can tout as a name on the list of stuff done to the car and wouldnt end up doing a whole lot unless the parameters were 100% right.

    At tradeschool we had a 5.0 that was stock, did a baseline run and then chucked the old Starr manifold on. Think they were around $2k when they first came out???? power increase on a stock motor was 6kw.

    Not real good $$/kw. Im sure if the motor wasnt stock and had a bunch of supporting mods the intake would have helped but, it's a big chunk of $$ to only work in an ideal environment.
     
  6. wraith

    wraith Hand over the dog bikkies

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    Not worth it unless your going forced induction. It's basically the last thing your really upgrade.
     
  7. commodore665

    commodore665 expat Saffa

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    yeah pretty much what had thought too , I'm not prepared to go down the road of forced induction on a V6 , may look at at diff gears as immortality had suggested , thanks for the input though . In reality they are probably a bit of wank to be honest , I was kind of curious about them
     
  8. commodore665

    commodore665 expat Saffa

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    yep it's the 190 with 5 speed , thanks for the information mate , much appreciated .
     
  9. Trayner

    Trayner Fresh prince of Pakky

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    Just get some Mace Spacers for it , Wont get any extra power out of your car . But it will move the power band down abit lower in the rev range . So will "feel" like you have a few more balls.
     
  10. commodore665

    commodore665 expat Saffa

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    actually , I already have the 25mm spacers , plus the CAI from Mace , with those combined , it breaths easier and a bit more down low , and a nice induction growl , but thanks all the same .
     
  11. commodore665

    commodore665 expat Saffa

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    and also thanks to you too Sabb .
     
  12. Revhigh

    Revhigh Member

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    I have an alloytec, had a set of 12, 18 and 25mm spacers. 18mm worked a treat

    Since then I have fitted the CPR6 with a set of 5mm spacers we made and to be honest the car feels like a beast to drive now compared to before.
    Mod list
    - CPR6
    -5mm spacers
    -Underdrive pulley
    -Stealth 3.0 Controller
    -Port matched
    -Revhigh Stealth Camshafts
    -Dyno Tune

    Still waiting to put my paxton back on with larger injectors but been caught up.
    All in all I think its worth it. Send me a PM for any pictures.
    www.revhigh.com.au
     
  13. Revhigh

    Revhigh Member

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    Oh and I have an OTR as well!
     
  14. Capsule

    Capsule Member

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    Wouldn't you feel the CPR6 gains earlier if you already have spacers, OTR, extractors and exhaust? Would be curious to see a dyno comparison with these mods instead of a bone stock engine.

    I remember I could really feel the extractors kick from 3500 when I fitted them, while the stock exhaust manifold was feeling flat and even loosing torque after 4500 (actually, you can see that on the graph).

    I reckon extractors + CPR6 would be even more noticeable.
     

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