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BMW 3-Series (E90 E92) Forum
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What we BROKE Today: 400WHP!
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11-06-2007, 01:33 AM | #111 | |
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11-06-2007, 01:44 AM | #112 | |
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<-----that white dude
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11-06-2007, 03:47 AM | #113 |
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nice, but it still looks like its NOT pulling all the way to redline...
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11-06-2007, 03:56 AM | #114 |
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Nice #s.
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11-06-2007, 03:59 AM | #115 | |
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cause at it's lowest peak it's still making 355whp at redline.I noticed some other folks only dyno to 6100rpm just so it's not visible on their tune. |
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11-06-2007, 04:23 AM | #116 | |
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I have an 87 Supra Turbo that puts out 220 crank HP stock. It now puts out around 400 rwhp and nothing has broken and I have taken it to the track many times (knock on wood). I'm sure the 335i will fare a little better 300hp hp to 400rwhp. But you're right, I'm a little worried about the auto guys.. Makes me wonder if I should change my auto 6sp order to a manual. Gary |
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11-06-2007, 06:38 AM | #117 | |
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Why would it be the turbos getting tired? They should be able to hold boost to redline with zero problem at 14 psi. I think what you are seeing is the hot side of the rpm and therefore the risk of detonation increases substantially. Every single tuner will back off timing and dump more fuel at high rpms to reduce the risk of detonation. It is safe tuning and nothing more. Wow, as usual tons of speculation on how the engine will hold this. Just because BMW made this doesn't mean it will hold. The legendary 2JZ engine on the IS300 was cracking piston rings all over the place over 400 rwhp with a compression of 8:5-9.0:1. Let the experts speak on this because the speculation helps in no way. Also, walked is already reported a slipping clutch at his power level, so we are seeing the first stock part reaching its limit. |
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11-06-2007, 07:27 AM | #118 |
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11-06-2007, 07:52 AM | #119 |
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Did the 50 v2's ship yet? Seriously, lets get some more v2's out there before you put out a v3. What are there, 30 v2's on the street and most of them are hand selected people for beta and a few lucky people? We have been waiting since early September.
Most of us will use 93 octane, with catback exhaust, and maybe catted dp's. You will lose alot of your customer base if you focus on race gas and offroad downpipes. What do you think the % of customers is that are interested in race gas an offroad downpipe maps? |
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11-06-2007, 08:02 AM | #120 |
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since august we have *heard* about first v2 beta, then 2.00 production, 2.01, 2.02 beta, 2.02 production... now talk of downpipe and racegas versions.... no wonder they arent shipping them, they are still developing it. procede is definatly "bleeding edge"
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11-06-2007, 08:06 AM | #121 |
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Great news. I anticipated this happening, just not sure this early. I am with the others in the long term R&D. 5 weeks is not long in the scheme of things.
Put it on a dyno and let it run for 24hr cycles, for 5 weeks. Everyone should chill and enjoy the R&D process. Too many people wanting to know what every little piece of the puzzle is. Good job Shiv. |
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11-06-2007, 08:14 AM | #122 | |
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11-06-2007, 08:40 AM | #123 |
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woot! i was right
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11-06-2007, 08:42 AM | #124 | |
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11-06-2007, 08:47 AM | #125 |
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Maybe so, but nobody is forcing you to get PROcede v2 AND exhaust AND DPs AND use race gas. I'm very happy with just my PROcede v2 tune...and that's it (stock exhaust, stock DPs, running on 93 octane). However, some ppl like more options and want to mod their cars to the absolute max; having more options are good and kudos to Team Vishnu for doing the R&D to provide customers with more "bleeding edge" options.
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11-06-2007, 08:55 AM | #126 | |
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Am I going to be the slowest car with my SSTT on 11/30 ? I am Jealous, no doubt about it, BUT seeing that ppl who order since summer are still waiting... That tells me, If I place an order today, I am looking into receiving the pkg by NEXT YEAR ???????? |
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11-06-2007, 09:03 AM | #127 |
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Congrats to Shiv and all the Vishnu team for the impressive results!!!!!
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11-06-2007, 09:07 AM | #128 | |
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Can u imagine how quick my stealthed-out metallic grey 135i is going to be...? Or an more agressive tune over the 340hp Tii...?? Insane..! |
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11-06-2007, 09:19 AM | #129 | |
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I'm sorry, but you need to stop spreading misinformation and learn what the heck you're talking about. First of all, nobody who tunes cars "backs off timing" at high RPM. If you're talking about offsets, you need to look at the actual values the car is seeing in the ECU. The risk of detonation as you put it is not highest at high rpm at all. Its variable depending on mapping and has nothing to do with high revs. At boost onset in low RPM, the values are low, but they increase substantially as the revs climb toward redline. Wanna knock? Run even half the timing at boost onset that you're running at 6500rpm. With interception, a tuner might reduce timing in offset values to offset the natural advance of timing since he is really tricking the engine's air flow sensors to think its running different than it really is. But those values are selected because he is trying to make the engine happiest in all rev ranges. As far as enrichening at high RPM under load, yes that's a good thing as extra fuel is used for in cylinder cooling. The main place where you're off base is with these tiny stock turbos. With race gas (more timing allowed) you can increase power earlier, but these tiny turbos will peak sooner. Every engine has a VE, and you can't overcome the size of the stock turbos. Put cams in this engine and you'll see it peak and fall sooner as well. Your point that the stock snails can hold 14psi at redline is moot. Who cares what boost they can hold? The inportant question is: Are they efficient up there? Obviously not. Look at the stock curve and look at the modified curves. If you've tuned several turbo cars, you can take one look at those turbos and realize that each is being fed by 1.5 liter and know they are not designed to make big power at high rpm. BMW says the car in stock configuration can achieve peak torque starting as low as 1300rpm for crying out loud! What more evidence than that do you need? They are small to make the car seem NA and enhance drivability, not to rev and make power. The IS300 thing is off topic, but still just full of wrong. You're comparing an iteration of 2JZ that was designed to be NA to the Supra engine. Get a grip, of course its not as internally robust! The compression ratio point is moot too, because our engine is direct injection versus the IS300 motor which was not. No wonder people get confused or afraid reading car forums. There's more misinformation from bad posts like yours than help from knowledgable ones! |
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11-06-2007, 10:01 AM | #130 | |
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First, if my info was bad, please let me apologize. I am confused then if the turbo has no problem producing 14 psi at x rpm (say 1800), then how is that boost falling off at high rpms? The turbo is fully spooled and should never fall off in boost right? If it is beyond its effeciency range isn't that something completely different then saying the boost is falling off? And my comment about the IS300 was simple, people do not know the limits of this engine and there is nothing more than speculation. If a tuner with a motor apart was commenting then it would hold water, but a lot of people are just using the "my feeling is". |
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11-06-2007, 10:02 AM | #131 | |
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The only way a turbo supra 2JZ is breaking pistons at 400 hp is with a horrible tune.
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11-06-2007, 10:09 AM | #132 | |
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