04-10-2012, 11:47 PM | #29 |
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However, the question is: will you lose elsewhere to fix the dip?
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04-10-2012, 11:47 PM | #30 |
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04-10-2012, 11:59 PM | #32 | |
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$200~$850... depends on which tune shop.
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They left it there, so aftermarket shops can profit. Like reply on 2fast4you, we don't have remap ECU for FR-S, so we don't know. From my pass experience, it doesn't lose any tq curve ('00 Impreza), it helps smooth that dip. Not 100% fully fix it, but it's noticeable difference in dip. |
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04-11-2012, 12:02 AM | #33 |
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04-11-2012, 12:03 AM | #34 |
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That may be true... but low cost as $200 isn't bad for fixing the dip in TQ line
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04-11-2012, 12:08 AM | #35 |
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Probably more. Open source tunes are about ~$400. Cobb AP are about $600 and only come with a base map, add $400 for a tune. Who's to say it's a tuning issue and not a cam or intake manifold issue? We'll see once people start putting these under the knife, but I have the niggling suspicion it's a design constraint.
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04-11-2012, 12:14 AM | #36 | |
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Quote:
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04-11-2012, 12:16 AM | #37 |
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Might be remap, but I'm starting to think that the intake/exhaust headers could be playing a much larger role than previously thought.
The car has an intake cam optimized for 6500ish rpm, yet it manages to pull off nearly the same torque at 3000ish. IMO, now the picture is coming together, the car SHOULD have really bad low end torque due to the cam, but the low rpm torque manages to match the high rpm torque. Let's look at a car that has a very good intake system, the LFA. The 3 stage intake puts the peak torque close to the maximum possible at all rpm, and you'll notice that the peak torque is dropping consistently as the rpms go down. The volumetric efficiency here is limited by the intake cam. That's what the FA20 should look like with a variable intake, albeit more flat because it has a smaller rpm range to work with. What we're seeing is low end torque matching top end torque. So I think what may be going on is that they realized the engine had no bottom end, and thus decided to compromise the top end with an intake optimized for VE in the 2000-3000rpm range. Hi Dimman, could this perhaps be the answer to your missing torque theory? I wonder if anyone has intake runner lengths. |
04-11-2012, 12:18 AM | #38 |
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It was free for my car. For a stock car you can find tuned maps on osecuroms.org and you just need to borrow someone's cable to flash it (or buy one for $99). Once you have mods you need a street tune which there are guys that will do it for $150 or you can learn to do it yourself. It will take time to crack the ecu though I'm sure.
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04-11-2012, 12:21 AM | #39 | |
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Cams: $300~$750 Port & polish Manifold: $250~$450 Port & polish in & out heads: $600~up Plus labor & down time of car vs re-map ECU: $200~up |
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04-11-2012, 12:32 AM | #40 |
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Well IMO the cams are looking pretty good right now, they're making power at high rpm, where they should be, I think to make use of bigger cams you'd need to raise the rev limit a bit. I'm super interested in seeing what different intakes will do though, as this is the first answer I've come up with to the "missing torque question" that makes complete sense, lol.
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04-11-2012, 12:46 AM | #41 | |
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04-11-2012, 12:54 AM | #42 | |
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Nice to see what appear to be dynojet numbers. Give it some boost, the car will be legendary. |
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