Hesitation in boost and high rpm

[StealBlueSHO]

Logged after R&R rear turbo boost side pipe and changing waste gate hose.

0to100
3rdGear

When looking at 0-100 and both LPFP and HPFP, they look to go up and down together. A drop of 20 psi on the lpfp equals something like 400 psi on the hpfp. Seems like the whole system is having trouble keeping up vs just the HPFP after the above mentioned repairs.

Interesting... however... both links point to the 0 to 100 Datalog18.csv..

Lots of KR through the entire run.. this looks like its the LMS tune based on spark and boost? And yea.. you are still having fuel pressure issues... your IAT2s are nice and warm 110F+ and ambient is close to 57..

Mike B. (EPP Guy) did a lot of experimenting with the LPFP and HPFP... found a direct correlation between the amount of pressure provided by the LPFP and HPFP being able to keep sustained pressure... People have noted with the Boost-A-Pump module which overdrives the LPFP seeing a couple hundred PSI increase on the HPFP side...

If your LPFP can't keep up, then I would look there.. but again.. I think you replaced that already?

Here is a log of my 4+X 93 Race Tune from LMS.. ambient is a bit higher.. around 70F but my IAT's are significantly colder which should mean my fuel system is taking a harder hit than yours(I believe)... At least you will have a baseline of what it should look like...

Interestingly enough.. the V10 tune you are running is commanding the same load as the 4+X.. Only difference I can tell in the logs, is LMS has removed pretty much all the torque control from your tune...

 

[polskifacet]

Interesting... however... both links point to the 0 to 100 Datalog18.csv..

Fixed Links

Lots of KR through the entire run.. this looks like its the LMS tune based on spark and boost? And yea.. you are still having fuel pressure issues... your IAT2s are nice and warm 110F+ and ambient is close to 57..

Could be gas

If your LPFP can't keep up, then I would look there.. but again.. I think you replaced that already?

Yes replaced. Don't understand how my car is demanding or not providing so much fuel. Driving me nuts that I have my hands tied.

 

[FoMoCoSHO]

The 3rd gear pull....you sure that's AJP's tune?

I ask because lambse is pretty rich.

 

[FoMoCoSHO]

The 3rd gear pull....you sure that's AJP's tune?

I ask because lambse is pretty rich.

Your LPFP is providing plenty of pressure to the HPFP, the lowest on the sweep was 96 psi which is more than enough to prime the HPFP for full output.

 

[polskifacet]

Its lms 93 v8. Not running AJP as he said that something is jacked anyway since he had to use throttle plate heavily to control boost spikes.

Sent from my KFFOWI using Tapatalk

 

[FoMoCoSHO]

HDP-5 input pressure is 58-101 PSI.

 

[polskifacet]

LMS would have to hook up a scope to the HPFP wires and throw it on the dyno. I don't think its mechanical. There are 3 quick connects on the low pressure side with mostly hard pipe and new pumps.

 

[polskifacet]

Update. I am driving to LMS at the end of this month! Fingers crossed.

 

[ZSHO]

NICE!!.. maybe we will meetup in Different Paths. Z

 

[SHOdded]

Good luck, polski!

 

[ZSHO]

I just wanted to give a Big  :bigthanx: to  Andy (shop manager)and Anthony over at LMS for there Fine continued support in hopefully troubleshooting Polski vehicle and please keep us updated on all counts and best of luck. Z  :thumb:

 

[ajpturbo]

Yes polski has been suffering for over 3 months...luckily he had others means to identify a problem  which then prompted some help after much persistence. So hopefully he can finally get some closure as it appeared he was put on the back burner...so ultimately good on lms for sticking with it

 

[polskifacet]

Dudes,
Made it out to LMS and back. Waiting for LMS to email me a recap of the day and hopefully they reply here to shed light on next steps. I don't feel like I can say much more but I see the light at the end of the tunnel. The guys over there are great, special shout-out to Ethan and Z for making it happen.

IIRC Dyno said 353 awhp

 

[ZSHO]

Finger's crossed. Z k:

 

[polskifacet]

Posting log after Lms visit.

 

[ajpturbo]

So what was wrong with your fuel system?

 

[StealBlueSHO]

So what was wrong with your fuel system?

Interesting your fuel pressure never hits target still... stay below 1900psi through the entire run... I have noticed on my datalogs, if I do a low rpm pull starting around 2500rpms in third like this datalog, I am able to hit target fuel pressure for 2200psi+..

****EDIT: Maybe the almost freezing temperature had a lot to do with the above statement...

I wonder what your datalog would look like from a dig...

Curious myself what LMS was able to find...

 

[polskifacet]

So what was wrong with your fuel system?

From what I understand, it shouldn't be mechanically faulty at this point in time or they would have seen/taken apart more. LMS is digging deeper into the issue.

 

[StealBlueSHO]

So what was wrong with your fuel system?

From what I understand, it shouldn't be mechanically faulty at this point in time or they would have seen/taken apart more. LMS is digging deeper into the issue.

Did they charge you for this?

 

[polskifacet]

So what was wrong with your fuel system?

From what I understand, it shouldn't be mechanically faulty at this point in time or they would have seen/taken apart more. LMS is digging deeper into the issue.

Did they charge you for this?

Not a penny, and had a chauffeur take me to the Ford Museum and back lol. Also sporting a earned Livernoise license plate bracket.