[vektorprime]

EDIT #2: Dorch has let me know that the issue is not the HPFP, it's octane. So did PTF. I will try to add E85.

Hey All,

I just finished up my Dorch Stage 1 HPFP install on my b58. I flashed my BM3 OTS stage 1 octane 91 map with Dorch HPFP stage 1 set in the config. There was an option for "Dorch Old calibration" and "dorch stage 1 (new)" I chose the latter. I want to note that I am using the stage 1 map because I don't have my DP installed yet, just the stock DP and a BMS intake. After the install, I went to shell to fill up on 93 octane, and did a 4th gear pull. Now, for the first time, I've seen engine knock in my logs.

Here's a log I took this morning

https://www.bootmod3.net/log?id=6117...90c6768b3af881

And a longer one:
https://www.bootmod3.net/log?id=6117...0b433767d5e4cd

For the 2nd log, towards the middle you can see the 4th gear pull. As soon as my boost deviation gets low, the knock happens.

Here's a comparison of a log on same 91 OTS map with the stock HPFP.

https://www.bootmod3.net/log?id=6109...90c67e84957fc7

You can see the corrections on each one are still not great. There is also a big difference between ignition timings. I recently did replace the spark plugs, but that hasn't seemed to help much. I guess the timings are higher in the good log because there is less boost. Again, this is 93 octane from Shell with a 91 octane map. For the install, I followed this guide - https://dorchengineering.com/wp-cont...ion_Rev1.1.pdf . I did torque everything to spec just like dorch suggested.

Next, I will unhook the HPFP again, re-seat and re-align everything, hoping that will help. The HPFP target + actual values seem good so I am surprised to see issues.

Looking for any suggestions on the logs since I'm very new to reading these.

[vektorprime]

Update: I re-did the whole install, and made sure everything was torqued to spec again. Then, I did another log. Unfortunately, I still have knocking going on.

https://www.bootmod3.net/log?id=6118...729b3ff54ad22c

I am willing to pay for some remote assistance, please PM me contact info if you're interested.

[kriszty]

how the car is running ? your log shows some problems

[vektorprime]

Originally Posted by kriszty

how the car is running ? your log shows some problems

It honestly felt fine! I was super surprised to see the worse timings and knocking.

It would take me 3 or so hours to get the old HPFP back in to troubleshoot, so I am hoping not to waste my weekend. If there were some log data that showed fuel issues, then I would at least be more comfortable. But, there's nothing I am seeing which explains the issue.

[kriszty]

Originally Posted by vektorprime

It honestly felt fine! I was super surprised to see the worse timings and knocking.

It would take me 3 or so hours to get the old HPFP back in to troubleshoot, so I am hoping not to waste my weekend. If there were some log data that showed fuel issues, then I would at least be more comfortable. But, there's nothing I am seeing which explains the issue.

not sure but the boost pressure deviation seems a bit off( boost leak ) ( correct me if i,m wrong ) low timing is mostly octan problem ( add some ethanol to check ( 4-5 liters )

[vektorprime]

Originally Posted by kriszty

not sure but the boost pressure deviation seems a bit off( boost leak ) ( correct me if i,m wrong ) low timing is mostly octan problem ( add some ethanol to check ( 4-5 liters )

Hmmm, I guess it's always been that way so I didn't think it was bad. But it's certainly possible that there is a boost leak affecting the system. Only thing I've changed is the intake, which is now BMS.

I'm trying to find other b58 logs, and some I look at show boost deviation 5-7 psi at start as well. Mine is high though, at 11.

EDIT: This one seems to be similar, high deviation at start but ends up meeting the target.

https://www.bootmod3.net/log?id=5ed0...0b434621ac4c6e

[kriszty]

Originally Posted by vektorprime

Hmmm, I guess it's always been that way so I didn't think it was bad. But it's certainly possible that there is a boost leak affecting the system. Only thing I've changed is the intake, which is now BMS.

I'm trying to find other b58 logs, and some I look at show boost deviation 5-7 psi at start as well. Mine is high though, at 11.

EDIT: This one seems to be similar, high deviation at start but ends up meeting the target.

https://www.bootmod3.net/log?id=5ed0...0b434621ac4c6e

yep i see, just for sure add some ethanol and check your hoses, and log again, timing should improve and the small knock also... let me know if it improves

greets from a sunny holland

[vektorprime]

Originally Posted by kriszty

yep i see, just for sure add some ethanol and check your hoses, and log again, timing should improve and the small knock also... let me know if it improves

greets from a sunny holland

So I just replaced my spark plugs (again). I suspected one might be back because when I gapped them I had to raise the gap and maybe damaged one. I left these new ones on stock gap. I haven't gotten a knock yet.

Timing still not perfect, but no knocking!

https://www.bootmod3.net/log?id=6119...729b4077c2dee7

As a reminder, here's a log before the dotch pump.

https://www.bootmod3.net/log?id=6109...90c67e84957fc7

It looks like my timings now are a little better with the new plugs.

[kriszty]

Originally Posted by vektorprime

So I just replaced my spark plugs (again). I suspected one might be back because when I gapped them I had to raise the gap and maybe damaged one. I left these new ones on stock gap. I haven't gotten a knock yet.

Timing still not perfect, but no knocking!

https://www.bootmod3.net/log?id=6119...729b4077c2dee7

great , low timing is due low octane, add some litres ethanol and log again

[vektorprime]

Originally Posted by kriszty

great , low timing is due low octane, add some litres ethanol and log again

Dang, I would hate to have to go to an E85 pump far away every week just to drive the car at the performance of 91 octane.

Are there any other values to confirm the issue is octane? From what I've read the Shell 93 octane gas is pretty good. And I was running the 91 octane map just for safety.

Also, is there anyway to take advantage of the Dorch pump I installed to just give more fuel? I assume I'll have to have custom tuners change things?

I guess I will wait to talk to Dorch or BM3 before putting back the stock HPFP.


EDIT: Hmmm, I did another log and it looks like the knock is back...

https://www.bootmod3.net/log?id=6119...0b4336e19c8af4

[kern417]

Contact PTF. They may be able to provide a test map for your specific setup/fuel quality

[vektorprime]

Originally Posted by kern417

Contact PTF. They may be able to provide a test map for your specific setup/fuel quality

Thanks Kern!

I contacted both Dorch and PTF. Both have replied VERY quickly, and both have been VERY helpful. Just for insight, both parties stated it's the fuel octane. I will drive out to an E85 station to get 2 gallons and test everything again.