02-06-2021, 11:13 PM | #1 |
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A tuner tells me I'll have to go from cts catted downpipe to catless in order to use pure800. Is that statement correct? Looking for 600 whp.
Current setup: TU pump, 200 cel catted downpipe, new champion plug at .022, kn filter, E30. Stg2+ map. Been told it puts down estimated 450 whp. 2019 M240i xDrive 7.5k miles |
02-07-2021, 02:23 AM | #2 |
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i think yes, i have the same setup and have planned for about 2-3 weeks also upgrading to pure 800. i already have a wagner 200 cell downpipe.. it helps spooling quicker the turbo....
it should get at least 500whp with regular fuel, not planning to upgrade to Ethanol or wmi. |
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02-07-2021, 11:45 AM | #3 | |
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You might be able to get away with it if you’re running high octane fuel, a lot of meth, or both. However; I doubt a TU pump can supply enough fuel for your power goal before it crashes. Those pure800s will demand lots of volume unless you run them at low boost levels Last edited by Devil doc; 02-07-2021 at 12:20 PM.. |
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02-07-2021, 11:51 AM | #4 | |
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02-07-2021, 11:58 AM | #5 | |
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The TU and the dorch stage 1 aren't that far apart in terms of flow, I think it’s only a 10% difference; Personally, I’d buy the big one. it’s probably more cost effective to get the larger pump from the beginning, rather than getting the stage 1 and then having to buy the stage 2 at a later time, also having that extra reserve flow is a nice. Last edited by Devil doc; 02-07-2021 at 12:23 PM.. |
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02-07-2021, 12:03 PM | #6 | |
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Have you draggy your current stage 2+ set up? I’m wondering what people are getting with their b58 2 series vs the regular stage 2. There’s not much info out there. Last edited by Devil doc; 02-07-2021 at 12:13 PM.. |
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02-07-2021, 01:45 PM | #7 |
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From what Peter said ( from Pure turbo ) the Dorch stage 1 fuel pump is needed , i,m planning only to use regular gas , so 500whp should be enough for me..
i did have a dragy, and my 100-200km time was 8.7 sec ( around 440hp ) with the new pure turbo 800 i think 6.9 or a low 7 sec is possible, Peter said that a higher octan gas helps getting more ps out of the pure 800 Here in holland we only have octan 98 ( i think the same like yours 93 in usa ) i do not plan to use octane booster, but hopely after the Covid crisis i can drive again to Germany where i can use 102 octan fuel... |
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02-07-2021, 02:02 PM | #9 |
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I think the OEM downpipe will restrict your turbo to much.. at least you need the dorch stage 1 , and a catless or 200/100 cell catted downpipe. All depends on the fuel you use.. but 500whp (around 550ps) is possible.
my setup is, wagner 200 cell downpipe, midpipe removed, Remus exhaust .. also will get newer brakes and lighter wheels ( breyton ) what is your 100-200 time , cause i think 450whp with your default turbo and oem downpipe seems me to much , i only got 440hp ( 400whp) |
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02-07-2021, 02:06 PM | #10 | |
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02-07-2021, 02:16 PM | #11 |
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02-07-2021, 02:42 PM | #12 |
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I got tu pump because that's what pure recommended for pump gas.
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02-07-2021, 02:49 PM | #13 |
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02-07-2021, 11:33 PM | #15 | |
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This is the reason why the tuner mentioned a TU pump would be fine with a bigger turbo since you didn't mention E30. If you mention running E30 to a tuner with a bigger turbo and just a TU pump then they'll tell you no. Even the stock turbo has shown to run out of fuel with the TU pump running higher than E30 blends. Bigger turbo on TU pump and pump gas or higher than E30 on stock turbo and TU pump you should really be checking fuel trims anyways to make sure you're not running out of fuel. Catted or non catted question is less about safety with a bigger turbo and more about HP left on the table. If you are ok with a little bit more noise and stink and pollution for the incremental HP gain from flow then go catless. If the incremental gain is not worth the smell or noise or pollution then stay catted. |
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02-08-2021, 02:56 AM | #16 |
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02-08-2021, 06:16 AM | #17 | |
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Besides the added restrictions on flow, the power you’ll leave on the table, and the higher EGTs, the catalytic cells found in most of the cheaper aftermarket downpipes eventually clog or melt at some point, so unless you’re planning to pay big bucks for a proper catted downpipe and stay a little more conservative with your power goals, I personally wouldn’t get one. It does makes sense why he would recommend a bypassing the catalytics all together, that is if you’re trying to make 600 whp. Last edited by Devil doc; 02-08-2021 at 01:13 PM.. |
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02-08-2021, 09:12 AM | #18 | |
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For a specific power target, you need to take to a tuner if they can make the needed power with the catted downpipe. It looks like your tuner said that he cannot do so safely
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02-08-2021, 06:02 PM | #19 | ||
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Ah but you are absolutely correct |
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02-09-2021, 03:23 AM | #20 |
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02-09-2021, 04:30 AM | #21 |
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02-09-2021, 11:46 AM | #22 |
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