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what could be causing this? (dyno run w/new cam) 

 

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Posted: Mon Sep 17, 2007 9:07 pm 
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My daughter has that cam and is geting about 194.6 HP at Blue Mountains dyno day out of an XG XR6 5 speed are you shore you got one of RPDs not a stocker?

 

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Posted: Mon Sep 17, 2007 9:17 pm 
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Ummm - is that RW Hp or flywheel? - std XR6 should be somewhere in the area of 164Kw at the flywheel which is roughly 220Hp - so I'd expect something like the mid 190rwhp for a STD Xr6.

 

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Posted: Mon Sep 17, 2007 10:32 pm 
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Quote:
I'd expect something like the mid 190rwhp for a STD Xr6.

no way my freind, more like 140-150rwhp which is approx 110-115rwkw

not all of rpds cams have pulled good numbers, maybe its not a 3...

 

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Posted: Mon Sep 17, 2007 10:43 pm 
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dasmq wrote:
My daughter has that cam and is geting about 194.6 HP at Blue Mountains dyno day out of an XG XR6 5 speed are you shore you got one of RPDs not a stocker?


Yup im getting 145 on a dd dyno and pulled 137 at cms with this cam.....

 

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Posted: Mon Sep 17, 2007 11:01 pm 
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^^^^ forsaken this is close to where you should be at...

 

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Posted: Tue Sep 18, 2007 1:16 am 
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yeah... it should be making more for sure. It has some stuff engraved on the end that I checked with jay from RPD, apparently it is a genuine rspec3 or "stage 2" in the old model #'s, plus i had to stick a bucket load of shims in there, so its definetly a regrind!!! the car just seems to hate it... what else can I do to check the cam timing?
the timing mark on the cam sprocket is just above the top of the RHS of the head with the engine @ TDC (like it should be), have tried running it slightly advanced and slightly retarded with the adjustable gear but neither made much difference, no error codes, umm, what else... :(

nick rekons his dyno reads a little low, but i think he said from memory he had an e-series on there with extractors only (and prolly auto) make 110ish rwkw. so extractors+cam+exh+manual should make a little more ;) I think maybe this cam is just cursed, i cant work it out ....

 

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Posted: Tue Sep 18, 2007 4:57 pm 
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hmmm. i have same prob, but found out the timing chain has slipped a tooth (or 2!) on AUX gear (thanks joe- cms for info on that) so base timing is way out- not on cam or crank but on what would be dizzy drive on el (mines ef so doesnt have a dizzy). whole front of motor has to come off the set up base timing again, then she should run sweeeet. 8-)

 

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 Post subject: cam timming
Posted: Tue Sep 18, 2007 8:07 pm 
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I'm glad that we tracked the problem down, once you get it sorted out you'll know what I'm talking about, again leave it a few days before dynoing it as the ECU will need to relearn :wink:

thanks

Joe
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Posted: Tue Sep 18, 2007 11:09 pm 
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hmm, anyway to check/confirm thats what has happened before i pull it apart?? (lots of bother to take P-T to work for a couple of days if i take it all apart and nothings wrong!!!)

 

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 Post subject: cam
Posted: Wed Sep 19, 2007 9:53 am 
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forsaken wrote:
hmm, anyway to check/confirm thats what has happened before i pull it apart?? (lots of bother to take P-T to work for a couple of days if i take it all apart and nothings wrong!!!)


can I suggest for you to put back your stock cam & start again, make sue that it feels like it's supose to before you started, then alteast you know thats it not anything else but the last mod that your've done....then go from there..

Joe
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Posted: Wed Sep 19, 2007 4:27 pm 
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At the BMFI dyno day my daughter was only beaten by Mat and FASTXR (in NA Class) all she had done was the same came so you do have issues as AUXR8 said start from the begining with STD cam dyno that them change you might have a problem with the set up.

 

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Posted: Sat Sep 22, 2007 5:50 pm 
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OK, well i had a bit of spare time today, and swapped the old (factory) cam back in. car seems to be running about the same (definetly not drastically worse!!!), idle a little smoother, maybe a little less eager to rev past 4500 but it still pulls just OK.

the timing chain noise is completely gone too (car still has the uprated valve springs in it+vernier gear).

I will organise a run on dynowogs dyno but, i cannot see the point of putting this particular cam back in, car doesnt seem to like it, nFI why... do places occasionally make "bad" regrinds? anyone want to stick this cam in their car and see how it goes?

 

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