12-28-2021, 08:11 AM | #45 | ||
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I'm using a check valve right on top of the nozzle with 20 psi cracking pressure, hopefully it works well enough |
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12-28-2021, 12:10 PM | #46 |
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Are there any actual disadvantages to running a backend flash with MHD and jb4 and letting jb4 control the meth?
Seems the most integrated and easiest yet clean way to do things.. |
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12-28-2021, 07:59 PM | #47 | |
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If just for cooling then why not a simple Hobbs switch? You really just need on/off for that - and if you dont need the octane or fuel volume then you dont need any safeties. If you want to go the JB4 route then I suggest you to run it in map0 and only use it for meth injection. I got a custom firmware from Terry that allow this.
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12-28-2021, 08:37 PM | #48 |
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I spoke with a few guys at bms and another person running jb4 for meth control, apparently you can run your backend flash (MHD) and set jb4 up just for meth injection, if I have the option to spend a little extra and actually gain performance for it and have safeties in place using this, I'll go this route, my initial idea was just to supplement the tune I'm on for octane stability and cooling, because I didn't have the knowledge to wire in safeties yet with the set up I planned on, but would later.
I misunderstood jb4 and had the concerns with drivability but was assured you can set it up specifically to feed meth how you want it while retaining your drivability. |
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12-28-2021, 10:00 PM | #49 |
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Regarding pushing the car a bit more...
In your shoes I would just go ahead and experiment with the OTS maps and the meth/water mixture. Start with Stage1 91 map and just work your way up until you start getting timing corrections - job done. I run 100% meth because I need the octane/volume more than the cooling (and because I am too lazy to mix haha).
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12-28-2021, 10:06 PM | #50 | |
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12-29-2021, 02:31 AM | #51 | |
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AEM over JB4 10 of 10 times!
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12-29-2021, 08:25 AM | #52 | ||
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But if the option is there to use safeties and jb4 offers that, I'm not hurting anything blushing the car at that point. I don't think the dme can handle something like an e20 tune pushing meth on 91 pump, and meth stops flowing. People get super knock on a bad batch of 91 pushing the car.. aem is nice and I think they offer a fail safe as well, it just won't be as integrated as jb4 imo without extensive work |
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12-29-2021, 11:34 PM | #53 |
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Alright - hope you'll have less issues than me with the JB4 N54tech.com will be your best friend in the future
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12-30-2021, 08:10 AM | #54 |
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12-30-2021, 09:00 AM | #55 |
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01-03-2022, 11:44 AM | #56 | |
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If you are going to use your meth to push into higher octane OTS maps stick only to the pump gas ones or race gas. I believe there was someone running BM3 stage 2+ with stock HPFP and meth (and pump gas), but then you really are relying on meth for both octane and fueling in a big way. |
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01-03-2022, 12:25 PM | #57 | ||
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I appreciate the details and insight you provided on this topic. Most of this is in prep to a bigger picture set up later this year, I do plan on upgrading the turbo, not sure the direction yet, whether it be ps2 or a big boost garret gtx800 set up, but I know I'm limited to fueling here with only 91 available, and the worst 91 at that, so meth was the easiest push for cleaning up octane even if I don't push more aggressive timing or boost with it. I feel it will be a major benefit on its own. |
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01-04-2022, 12:19 PM | #58 |
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ZM2 Says his TTE turbo has stock like spool and he's near 500WHP on E50.
But I would LOVE to see a BEF dyno if you ever do one, and I believe that Terry provides the free custom maps?
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01-04-2022, 01:34 PM | #59 | |
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I'm very curious to see what 100% meth and 91 can do on stock turbo properly set up |
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01-04-2022, 02:10 PM | #60 |
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Probably about the same as stock turbo on ~E70-85 since you will likely be turbo limited rather than fuel/octane limited. Would likely be similar to a race gas + HPFP power level.
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01-04-2022, 03:34 PM | #61 | |
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01-05-2022, 09:03 PM | #62 |
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Little update
Lines came in, I'm piecing my own kit together. Almost there. I do need jb4, fsb and solenoid from them. But I'm hoping to have it plumbed and purged this weekend to make sure no leaks. |
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01-13-2022, 05:59 AM | #63 |
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So.......let me show you why you dont actually need any safeties
Tested a new map today and forgot to turn on my meth. Map is made to use meth for both fuel volume AND octane. Without meth - multiple timing corrections, HPFP drop and STFT corrections https://datazap.me/u/harkes/mapswitc...25-26-27-28-29 With meth https://datazap.me/u/harkes/mapswitc...25-26-27-28-29 Had the HPFP completely tanked the DME would have shut down injectors to supply enough fuel for the other cylinders to not run lean. Just FYI for insight
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01-13-2022, 08:59 AM | #64 | |
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01-21-2022, 03:30 PM | #65 | |
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also, the DME capability to adjust STFT is not as quick/effective for 6MT after gear shift
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01-21-2022, 03:42 PM | #66 |
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nice kit. consider a filter. i added one and the peace of mind is worth it. what are you going to use for mixture?
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