DIY 335IX built motor/trans single turbo build

[nyt]

Slight hangup installing new pump and filter. Previous was using 5/16 bundy return, new is using 3/8, waiting now for the new connector.

I took apart the old fuel filter, didn't seem too bad...

dirty side

clean side

New unit with dual 535s from pfs...

 

[pysical]

Whats the outputs on the fuel pump go to? 2 of them go to a Y line that goes to normal plumbing I am guessing? If that is the case where is the 3rd one going? Straight out the passenger top hat?

 

[nyt]

Whats the outputs on the fuel pump go to? 2 of them go to a Y line that goes to normal plumbing I am guessing? If that is the case where is the 3rd one going? Straight out the passenger top hat?

one output connects to the other, then the remaining to the stock feed line

 

[nyt]

Dual 295s and an aftermarket filter assembly do not play nice.

 

[NoGuru]

Oh wow, is that just from pressure? I think maybe you had a small crack and it just opened with the new pumps.

 

[nyt]

Oh wow, is that just from pressure? I think maybe you had a small crack and it just opened with the new pumps.

That bubbled out then popped while under full load. I had a dozen pulls prior with the new hardware.

 

[nyt]

New setup incoming with an external feed and filter for one of the 295s. Got a continental filter assembly today. Much stronger hose, though it likely won't be needed this time.

Will post pics when I get it in and installed. Big thanks to Chris @ PFS for putting all the bits together for me. I don't have the time for it as I'm in the middle of a move and just need the car driving to get it 700 miles to the new place.

 

[doublespaces]

Which section of hose is this?

 

[nyt]

Which section of hose is this?

fuel pump to filter

 

[nyt]

I imagine this should help. Going to tidy up tomorrow night.

 

[nyt]

Dual feed is go. Good oil pressure on cold start too

 

[RuskiRacer]

Dual 295s and an aftermarket filter assembly do not play nice.

View attachment 55598

Did your car die driving after you found this out? I was doing a pull today and car died after the pull didn't wanna start again brought it home has no fuel going to the injectors. Going to dig into it more tomorrow

 

[nyt]

Did your car die driving after you found this out? I was doing a pull today and car died after the pull didn't wanna start again brought it home has no fuel going to the injectors. Going to dig into it more tomorrow

Yep, died on the highway. After about a dozen pulls.

With 295s, there's a chance if one pump dies, you wont have fuel pressure. Check valves on the 285s are a bonus there....

Which filter assembly are you using?

 

[nyt]

Also, big shout out to Chris @PFS who was great at getting this setup together for me. I haven't had time to order all the fittings and filters and everything. He went above and beyond getting this together for me and rebuilding the pump after I figured out I needed to run dual output.

If you need fuel stuff, reach out to him. IMO, he's the best of the vendors out there for fuel products.

The system in place now is dual -6 feeds, one from the oem filter, and one from an additional fitting on the pump cap. They merge into a filter then it's -8 to a -6 Y splitter for hpfp and pi rail. The pi rail has a -6 return to a regulator then back to the pump. That should take care of it :0

I forgot to take a pic after tidying this up. Ah well.

 

[RuskiRacer]

Yep, died on the highway. After about a dozen pulls.

With 295s, there's a chance if one pump dies, you wont have fuel pressure. Check valves on the 285s are a bonus there....

Which filter assembly are you using?

Well I was using the spool performance one. That one broke on me so I think I ended up using some old venturi lines and making it work. I bet they gave out on me were fine for a good 15 pulls at like 30 psi on the stock motor. First wastegate pull on the built motor bye bye lol.

 

[nyt]

Fuel issues solved. The JB4 ST firmware was reporting the wrong values (low) so I was running too much pressure which caused one of the pumps without any venturis to misbehave, as it was essentially dead headed. I also hooked the boost/vac reference up which further dropped the pressure during low fuel demand.

I've been banging my head against a wall though for some other issues, some of which I just solved. I had bank to bank AFR differences, but that's just the single turbo msd81 fun. I disconnected the downstream sensors by pulling pins 19+20 from the small jb4 black female connector and reset the adaptations and now that's happy.

Unfortunately, I'm running into another issue where it keeps going open loop and killing bank 1. Fresh plugs and injectors. I've even swapped everything (coils, wires, plugs, high and low pressure injectors) between bank 1 and 2 and it does not follow. Really running out of ideas here

more logs here: https://www.spoolstreet.com/graphs/...id=67210&series=0,3,9,13,17,23,34&zoom=-1,126

Additional information

Firmware	Interface	JB4_MAC_Address	TMAP_V	Learned_Ign	DWP	MethTriggerMode	FF	MethSafeMode	MethAdd	MethScale	MethPSI	VIN	E85_Setup	VFF_Offset	fuel_30	fuel_35	fuel_40	fuel_45	fuel_50	fuel_55	fuel_60	fuel_65	fuel_70	map6_15	map6_20	map6_25	map6_30	map6_35	map6_40	map6_45	map6_50	map6_55	map6_60	map6_65	map6_70
30/139//2	JB4 Android A356	0BF5B35EB8F4	1.96	21.9	50	0	37	0	0	100	8.0	3C53AA408127	NONE	180	50	50	50	50	53	56	60	64	68	8.0	8.0	15.1	15.1	15.1	15.1	15.1	15.1	15.1	15.1	15.1	15.1

BoostSafety	PID Gain	AutoShiftRed	Fuel_OL	FUA	1st_limiter	2nd_limiter	3rd_limiter	Options	N20_TMAP	6CylMode	LastSafety	duty_15	duty_20	duty_25	duty_30	duty_35	duty_40	duty_45	duty_50	duty_55	duty_60	duty_65	duty_70	et_enabled	et_n1minrpm	et_n1maxrpm	et_n1ramprate	et_n1mingear	et_n1minadv	et_n1minafr
35.0	20	95	0	0	15.1	20.0	0.0	1_6_7_ON	2	5	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0

Hide legend Reset zoom

 

[nyt]

open loop issues were related to false knock from the forged bits and closed deck. After shitrockn54 was kind enough to define some extra tables for me, I was able to tune it out.

N54 - N54 False Knock solved in tuning, even for built closed deck motors

Thanks to @Shitrockn54 for defining the tables, I've managed to tune out the false knock issues, even with with built closed deck motors. My car was constantly pulling timing and throwing super knock codes on straight e85 before, especially as I turned the boost up. The combination of ije0s...

www.spoolstreet.com

 

[nyt]

So now that I've gotten past most of the fun issues and started turning it up, I've run into yet another problem. More boost is resulting in less power up top. Everything is smooth and logs are good, but 15psi of additional boost is making the same power at 6200rpm and less above. Similar happens at 6400rpm with an 8psi difference. The 24-22psi pull kept building power until I stopped the run at 7600rpm.

I'm wondering if this could be valve float as I'm running the factory valve train or if the factory exhaust with cats swapped to resonators is too restrictive. I need to disconnect the flap actuator and ensure that stays open to test during a pull, but I'm pretty sure I have it programmed correctly.

Any thoughts? There are no boost leaks. The turbo is a 6466g2 on a speedtech manifold and operating at under 35% WGDC.

Here are three 3rd gear pulls at various boost levels. You can see the higher boost definitely makes more power down low, but as revs increase, it falls down below the lower boost pulls.

Interestingly, the issue is less pronounced in 4th gear, but still very apparent.

And comparing a higher boost 4th gear pull to lower boost 3rd gear pull...

This is the exhaust

Log from a 32psi 4th gear pull.. pretty much looks the same as all of them.

datazap.me | nyt | Log 1656042884

datazap.me

 

[Jern54]

You can try to empty the center muffler which I did as well some time ago.
But my guess is valve float..

 

[nyt]

You can try to empty the center muffler which I did as well some time ago.
But my guess is valve float..

Any pics of what that looks like inside? What did it do to the sound when you made the change?