about to give up. 2bar SD Tune and log files attached for review.

[Windsma]

This is round 58 of killing all the gremlins on a new build. Blindsquirrel is likely tired of all my threads.
I think most are gone but the new trans is either slipping or something is wrong in the tune not allowing to build boost.
Smoke tested an no boost leaks, 14in vac, correct spring installed in bov.
7psi spring in the wastegate, fire ring is in there, both referenced at the brake booster port of a truck intake. (manual brakes)
No exhaust leaks.


My first test drive, the car was really quick to 35mph in the neighborhood, bov was very loud.
I then took the advise of others and installed an intercooler losing my hood latch.
Since then, I drove it to the alignment shop easy driving. From there it never felt the same as the first day. MAP log never breaks 100kpa. bov is quiet. Passing gear does nothing, 3rd almost feels like its gone trans maybe has 40 miles on it.

5.3 L33, p59 DBW, 50lb (injector data from BS), Filtered 7875, Sloppy best cam, 3bar map from efisource
4l80e, P/N only shifter, 28-3200 converter, 60psi boost referenced fuel regulator
functional PCV system, AEM 30-0300 wideband only, 4.5 to 3.5 open downpipe exhaust.

Most of this file was taken from sloppy's dontbsme tunes.
nothing when floored.hpl
test11wsloptransswap.hpt
I dont feel confident with the only dyno tuner local to me.
Wasting $800 on a dyno session, if the $2000 rebuilt transmission is junk doesnt sound like a good time.

I think thats it, this is my first HPT experience. thank you for your time.

[SiriusC1024]

Have you noticed how lean it's getting at WOT? Are you asking how to fix this?

[blindsquirrel]

You have a restriction somewhere on the inlet side, you're WOT and MAP steadily drops off. Check for couplers/bends sucking shut, most common cause. Or a rag got in the intercooler, something is stopping it up.

[blindsquirrel]

Have you noticed how lean it's getting at WOT? Are you asking how to fix this?

It's lean because MAP drops and PE turns off. It's not able to eat enough air to need PE.

[SiriusC1024]

Oh right, and it's not compensating because...

You know it...

Ur car on open loop:
OL tards.jpg

[Windsma]

I pulled the cold side apart earlier today. Nothing physical is blocking.
cold side: 3in turbo output to 3in pipe and coupler to 2.5in intercooler input, 2.5 intercooler output to 3in pipe to throttle body.
its the biggest intercooler I could fit behind the 1967 Nova grille. I blew air into it an used my hand to cap off, it held pressure then flowed.

Tomorrow, I plan to cut some pvc pipe and bypass the intercooler for testing. The driver's side intercooler coupler could be trimmed back some for less of a radius. They are regular amazon cheap 4ply silicon couplers.

Any possibility my charts are not setup correctly? I chose the SAE map rather than the 3bar option.AFR Err.Table.xml
in the tune, the map characteristics are setup @305 10.33 per efisource's recommendation.

[blindsquirrel]

The SAE channel is only 1-bar. Delete it and use the one that matches your OS.

[blindsquirrel]

This is the point where MAP falls below the PE enable setting, even though throttle remains flat...

screenshot.21-05-2023 18.43.05.png

It's just not getting enough air into it to keep the MAP high. Something is choking it out, and as far as I know there's nothing you can screw up in the tune file to make it do this.

----------

Sirius, forcing open loop during wideband tuning is perfectly fine - to do the non-PE regions it has to be in OL for the wideband to give accurate error data. And, there are some racy combos that just do not work right in closed loop, ever. It's not automatically a sure-fire sign of a hack job.

[Windsma]

Thank you BS
I have no problem buying better than amazon stuff now I know what fits.
any chance the intercooler packing is wadding up?
This could possibly be the issue. I'll take it back apart now and show you inside... the packing looks like one of those things you clean dishes with.

[blindsquirrel]

Packing? Inside an intercooler??

[Windsma]

Its not pretty...
product from DNA motoring on amazon.
IMG-5597.jpg

[blindsquirrel]

That's hilarious. I mean, since it's not happening to me, obviously.

[Windsma]

noob turbo problems.
I'll use the measurements and order a new one.

[Windsma]

Mishimoto ordered.

[SiriusC1024]

https://www.mishimoto.com/engineerin...oler-selection

[Windsma]

DNA motoring tried to do the "offset fin"... they get a participation trophy.

this one will be here tuesday. https://www.summitracing.com/parts/m...hoCb6kQAvD_BwE

[Windsma]

PVC test pipe proved the intercooler to be the problem. Thanks BS

I was reminded why I used the sae map sensor.
When selecting 2bar map it only fills the top row of the graph.

[blindsquirrel]

When selecting 2bar map it only fills the top row of the graph.

The graph has to be changed, too. The PID the graph is using goes away when you use a different one in the channels list.

[Windsma]

Now I know everything is working correctly, I should reset vcm scanner back to default.

I have layout files from Goat Rope and The Tuning school but they may be confusing things.

[blindsquirrel]

Just change the parameter the graph is using to the new one. Everything else that didn't get changed should still work as-is.