well that messes with my head .
I thought PSI = air flow = power . I know when I blew my motor I had very low compression in 2 chambers . On the road giving it stick I could not even tell there was an issue . It just would not idle or start without a push. |
Just had a thought ........................ stuck ssv ?
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Proof that you can't feel small changes in HP - his car feels ok; but he was down 40 WHP. It even felt fine on the way to the dyno except for being too rich.
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Originally Posted by Kane
(Post 3223289)
That's what low compression motor do... move air but with limited power....
I bet I couldn't have gotten the turbo too much higher since the power was down, but the BNR turbo is just barely waking up at 9 PSI. |
Keep us in the loop.
I am very curious to know the deal... I am definitely NOT sure of my diagnosis. |
Originally Posted by Brettus
(Post 3223267)
So -you actually saw 9 psi at 7000+ rpm but made no power ?
That does not make sense |
Originally Posted by Kane
(Post 3223315)
Keep us in the loop.
I am very curious to know the deal... I am definitely NOT sure of my diagnosis. |
If they will do it and it is fairly cheap - I would. Once we verify compression is good - we can start trouble shooting other stuff.
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Originally Posted by Kane
(Post 3223353)
Did you ever read my Static vs Dynamic Compression article? That is where I am going with my hypothesis.
What I'm getting at is - if you saw 9psi at the UIM to the redline and there was nothing blocking flow from that point onward you should have made approx. 300whp . Because we know a Renesis flows enough air at that psi to make that hp . Then you have to ask - why didn't it flow enough air if it was at that psi ?There must be something blocking flow - hence my SSV suggestion . |
ORRRR - the issue is that your 10 to 1 motor is ACTUALLY 9 or even 8 to 1... due to worn apex seals.
BUt yeah the SSV is actually a good suggestion; weird how no CEL kicked up though... when mine were stuck open I got a CEL. |
Originally Posted by Kane
(Post 3223379)
ORRRR - the issue is that your 10 to 1 motor is ACTUALLY 9 or even 8 to 1... due to worn apex seals.
BUt yeah the SSV is actually a good suggestion; weird how no CEL kicked up though... when mine were stuck open I got a CEL. Does anyone know the code that is for stuck SSV? I will look when I get off work and see what kind of CELs I am throwing. |
Originally Posted by Kane
(Post 3223367)
If they will do it and it is fairly cheap - I would. Once we verify compression is good - we can start trouble shooting other stuff.
Or because its FI that they wont want to touch it? I am not gonna ask for a new motor, I will just have it rebuild and ported if thats the case. |
The only other things I can think of are an exhaust restriction...or an intake restriction
The car has a punched CAT so I doubt its that.... And the Dyno graph had the expected dips for the SSV and APV...so I DUNNO Bit of a quandary......Compression results would be good..at least it can be ruled out |
I have the OEM Mazda compression tester in my garage just waiting to be used.
:D: |
Originally Posted by Nemesis8
(Post 3224546)
I have the OEM Mazda compression tester in my garage just waiting to be used.
:D: |
^ he lives out on the peninsula.. aberdeen or something, i think. ;)
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Plugs looked good, coil terminal connections were ok; and I heard no audible misfires; and the dyno had a sorta ignition issue funky power loss - but not NEARLY as bad as every ignition doomed dyno I have seen.
Let's rule out compression and go from there; It could be vacuum routing - he had a 3/8 inch uncapped nipple on the turbo inlet pipe when I got to the car..... so there are bound to be other issues. |
Originally Posted by J.Cab
(Post 3225155)
Where do you live, I wouldnt mind driving over to your place and using it...that is if you dont mind. I would like to get an accurate reading.
Send me a PM. I travel to Olympia often, and I fly in and out of SeaTac all the time. |
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