Lookie what I got off Ebay...
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Yeah, You've Probably Never Heard Of Me.
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Originally Posted by ipozestu
That looks really sick. As for the torque curve... Hold on Weeeeeeeee!!! If you have some constructive criticism regarding my "problem" please PM me. I don't think I am getting any heart felt opinions here. I know you'll lay it out for me.
Nothing fancy has been done. Pretty much a standard 2.5l Hybrid. I should have great spool because of the higher compression ratio. I am running the oversized head gasket, but still CR is higher than the 2.5L. The MAF is only pegging 4.5v. It just doesn't want to make any power.
Thread Starter
Yeah, You've Probably Never Heard Of Me.
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From: in a glass case of emotion.
Car Info: 345/30/19s
Originally Posted by ipozestu
Nothing fancy has been done. Pretty much a standard 2.5l Hybrid. I should have great spool because of the higher compression ratio. I am running the oversized head gasket, but still CR is higher than the 2.5L. The MAF is only pegging 4.5v. It just doesn't want to make any power.
Originally Posted by ipozestu
Nothing fancy has been done. Pretty much a standard 2.5l Hybrid. I should have great spool because of the higher compression ratio. I am running the oversized head gasket, but still CR is higher than the 2.5L. The MAF is only pegging 4.5v. It just doesn't want to make any power.
I have the same setup as you but w/ a full valvetrain and .05 cometics iirc. Not finalized yet (crap DP, vacuum leak I have to chase down) but numbers look pretty decent for a vf30...
bah sorry to minor hijack but for Ipozetsu and any people planning a 2.5l hybrid, aparently the MAF\ tables in the WRX ECU peg out at lower values than the STI - so basically you don't even need a big MAF b/c you are ****ed by the limits of the ECU unless you go Hydra or swap to an STI ECU and reflash...
Originally Posted by Krinkov
running WRX heads + cams? if your running the .078 cometics you should be right around 8.3/1 cr, which is right where you want to be IMHO, hard to speculate without seeing what your talking about though, have your graph? what numbers did you hit??
Yeah Ed tuned it. Upgraded(or thought) to the 20g for a couple of reasons. 1st was I wanted to stretch the power curve out a little more. the 18g ran out of breath at about 5000RPM.
2nd I thought the 20g would be better suited for this application. It runs much more efficient then the 18g at higher RPM with little spool sacrifice.
3rd It's what I was told to do. If I have learned anything from this mess. Ask questions and listen to what people (you know who you are) tell you to do.
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Yeah, You've Probably Never Heard Of Me.
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Originally Posted by verc
bah sorry to minor hijack but for Ipozetsu and any people planning a 2.5l hybrid, aparently the MAF\ tables in the WRX ECU peg out at lower values than the STI - so basically you don't even need a big MAF b/c you are ****ed by the limits of the ECU unless you go Hydra or swap to an STI ECU and reflash...
Originally Posted by Krinkov
indeed, but a big maf still works on a WRX the exact same way it works on an STI
But of course people have been making like 500whp with a WRX ej205/ECU, so Ed hypothesizes the ECU does some speed density measurement extrapolation. I'm hoping to investigate this matter in detail since I don't want to be limited to like 310whp or something like that.
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Yeah, You've Probably Never Heard Of Me.
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Originally Posted by ipozestu
Hijack???? Is that what this is called? I should start a new thread so Jeremy can merge them.
hijack? no way, your drawing heat off my half-assed Ebay header idea, should never browse ebay drunk
anyhow, heres hat Geoffs did with his TD06 20G, yours should spool a bit quicker still with the top mount,
Originally Posted by ipozestu
Hijack???? Is that what this is called? I should start a new thread so Jeremy can merge them.
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Interesting discussion here guys...
There's deffinately something up with Jeff's car. There is either a major restriction somewhere or there's something wrong with that turbo. I've tuned more than a couple 20g's without much problem and got great results. I racked my brain trying everything I possibly could to get Jeff's numbers up, but no matter what approach I took, the power was limited to around 260whp. The next step is to swap in a VF3x, re-tune and see if that makes the expected power. That way we can atleast rule out the turbo as the culprit.
As far as the big MAF, its completely useless on a WRX. The ECU can't reference flow rates beyond 300 which occures at about 4.7v with the stock MAF housing. So there's no point in scaling the voltage down since the ECU can't map a higher flow rate to it anyway.
Thanks
There's deffinately something up with Jeff's car. There is either a major restriction somewhere or there's something wrong with that turbo. I've tuned more than a couple 20g's without much problem and got great results. I racked my brain trying everything I possibly could to get Jeff's numbers up, but no matter what approach I took, the power was limited to around 260whp. The next step is to swap in a VF3x, re-tune and see if that makes the expected power. That way we can atleast rule out the turbo as the culprit.
As far as the big MAF, its completely useless on a WRX. The ECU can't reference flow rates beyond 300 which occures at about 4.7v with the stock MAF housing. So there's no point in scaling the voltage down since the ECU can't map a higher flow rate to it anyway.
Thanks
Originally Posted by Krinkov
hijack? no way, your drawing heat off my half-assed Ebay header idea, should never browse ebay drunk
anyhow, heres hat Geoffs did with his TD06 20G, yours should spool a bit quicker still with the top mount,
anyhow, heres hat Geoffs did with his TD06 20G, yours should spool a bit quicker still with the top mount,