notyper
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Just had Hasport's Civic Si/RSX-S hybrid on my dyno yesterday. While I have to maintain confidentiality on specific results, I can tell you that those of you waiting for Hondata's ECU tuning to become available for the RSX-S won't be disappointed. There are pretty monstrous gains available just with ECU tuning. There is still lots to figure out, but the gains are there. I believe the results will be published in SCC in the next few months.
Now, must find more power from my S2K....
SC
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RyanDL
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Nickc
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RSX/SI Hybrid?....is that SI engine w/ RSX S head? As far as the Hondata ECU tuning..Is this a whole new ECU or like superchips where you send it away?
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notyper
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Nope, that's an Si with an entire RSX-S engine and tranny in it. Hasport was the first one to do it.
The ECU on the RSX actually is flash programmable from the factory, so all Hondata has to do is figure out how to reprogram it - which they've done. Now they're just figuring out what works best. You'll prohbably be able to buy your own flash programmer, or send your ECU to Hondata (cheaper, but you won't be able to change the tune).
SC
Nickc wrote:
RSX/SI Hybrid?....is that SI engine w/ RSX S head? As far as the Hondata ECU tuning..Is this a whole new ECU or like superchips where you send it away?
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Danny1
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I'm curious, why would Honda go with cams/ compression to get more power from the Type R, when simple breathing mods and ECU changes can net a similar power gain?
Is it for emmisions reasons?
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RyanDL
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Well, I think for several reasons.
1) Emissions. Making a high-output 2.0L that revs to 8K RPM and is LEV certified ain't easy. Trimming back the performance a bit via ECU tuning without compromising potential is easy.
2) Other Hondas. If the Type S came over with, say, 220HP stock, and the Type R were tweaked to have, say, 250HP stock, people would be wondering about the S2000, which is supposedly the creme de la creme of Honda 4 cylinders.
3) Upgradeability. Honda can, in 2 years or so when sales are slipping, just flash the ECU and sell the Type S with an extra 10 or 20 horsepower, instantly generating sales for almost no cost.
You'll also notice that just by adding a CAI to the Type S you can pick up about 12WHP. That's a LOT on a Honda for just 1 bolt-on. Imagine how much potential this engine has?! It's making me salivate...
Ryan
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Nickc
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True.....I am becoming even happier w/ my purchase of the type s. I have not started tuning yet (only had the car for 3 weeks) but 13 sec mark is sounding very achievable w/ basic bolt ons CAI/E/H and now the ECU. I too am starting to salivate.
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Brillo
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Since the 4 cyl iVtec engines found in the civic Si/RSX/CRV and soon to be Accord are related, would this tuning ability also apply to these other engines? How about the 2.4 in the CRV/Accord?
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notyper
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It may. Certainly you will be able to reprogram the ECU's on Civics, RSX's, CRVs and Accords. The only question is whether or not there will be gains.
Also, on the Hasport car, keep in mind it did have I/H/E, so you might not see the same gains on a totally stock car. But I think that most people looking at an expensive ECU will look for those other mods as well.
But, as I said quite a while ago, the K20 motor is largely derived from the F20 design in the S2K. The cylinder head, block, etc. are very similar. Outside of a little head porting and some bigger valves, there is no reason the K series can't get very close in power output to an F20C. I think in the next 6-12 months that will be proven to be true - which is why I need more power from my S2K (Hondata is working on that ECU too - they're busy boys!).
SC
Brillo wrote:
Since the 4 cyl iVtec engines found in the civic Si/RSX/CRV and soon to be Accord are related, would this tuning ability also apply to these other engines? How about the 2.4 in the CRV/Accord?
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doctorcliff
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notyper wrote:
But, as I said quite a while ago, the K20 motor is largely derived from the F20 design in the S2K. The cylinder head, block, etc. are very similar. Outside of a little head porting and some bigger valves, there is no reason the K series can't get very close in power output to an F20C. I think in the next 6-12 months that will be proven to be true
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I think the K motors, with the new VTC trickie-deal, have incredible potential for forced induction. Varying the int/exh overlap as boost varies, is a tunerd's dream come true. I think a properly-tuned positive disp supercharger on a K motor would be beyond most folks' expectations.
The more i thought about this, the more i wonder if i shoulda bought a base rsx, just for the lower compression! just kidding.
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FunkyR
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Mmm I'd be interested to see what they can get out of the K series engine....
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