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Steve @ BMS/Fuel-It! Steve @ BMS/Fuel-It! is offline
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Join Date: Oct 2012
Car: 135i
Default Fuel-It! B58 update with Pure Stage 2 turbo - 12-29-2017, 04:04 PM

Hey guys, we get lots of questions about our B58 progress so we thought weíd make a post updating everyone on where weíre at with this platform and what weíre currently doing.

Weíve had our Pure Stage 2 turbo for a while now and no issues. The car is powerful and shows a lot of potential. When we (actually Pure Turbos) installed the turbo a few months ago it did about 540whp at low WGDC but fueling was an issue so we didnít press on. At this time the tuning constraints for timing and fueling are still the biggest issue and boost control is no problem with the JB4. We are continuing to work on the fueling and timing issues with Terry Burger and making progress but as most know, the DME tends to run very lean due to the often low DME BT no matter how much fuel we throw at it.

**** Running lean on low octane fuel can lead to engine damage. This is risky business until we have all the proper tuning tools in place so keep that in mind when cranking up the boost and consider yourselves warned. 😉 *****

We have tried a variety of configurations and have a couple working theories but ultimately weíre still fighting the DME. At this time we only run race gas (108 octane) and inject Ignite Racing Fuel E98 when testing high boost. We use CM5 nozzles with full PWM pump control via the JB4 at about 30% duty cycle. In the mean time we would not recommend adding a lot of supplemental fueling beyond what is needed to keep trims from maxing out as it does not help. In this case we do not believe more is better and would strongly caution people not to run too large of nozzles or too much PWM. Doing so is counter productive and increases risk, especially if injecting standard gasoline.

As we make progress we will update everyone in this thread. Please refrain from calling or emailing us individually and ask your questions here so everyone can read the responses.

For those that prefer too, we can use this thread to post logs and work on development to keep everything in one place. We'll also share our logs and information as we progress.


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Video of our Stage 2 LPFP upgrade installation.

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