Pushing Mark's VR-4 w/ BM Billet 19T's - 600AWTQ and Counting!

[NOMIEZVR4]

Alan, here are a few old 19t dyno charts of mine from a few years ago...take them with a grain of salt. I didn't have a map sensor back then but most of these pulls were in the 20-22psi range. Stock intercoolers, EVO MAF and HL wheels...though I ported the hell out of my hotsides as you will see. Stock timing map(maybe 1-2 degrees added in some runs...I don't remember exactly) also on e85...Not sure if they're helpful or not but just some additional data you could possibly compare against?







571 pull was an outlier...


Traced the timing map according to the datalogs...can't believe I used to run the stock map..!!




I also had wrx compressor housings but you also have bigger housings with the BM billets..

[bboyalan]

Thanks for sharing Nomie. I will keep them in mind along with my other personal (cast+billet) 19T tuning results.

From my FB discussion:

Previously, the same boost setting yielded another 2-3lbs after installing the Vibrant vacuum block+lines and simultaneously addressing a noticeable leak. Today, I pressure-tested up to 32lbs and discovered a handful of small leaks (using soapy solution) at the plenum (ports and toward nose of motor); they all add up as small as they are.

While I have it off, I will also finish reworking the engine bay for heat control and tidiness - two rear shields were done yesterday. I already made my tuning adjustments to get more aggressive again, so we will just need to cross our fingers and hope for the best.

Interestingly, SoCal is supposed to get slight showers today. Talk about symbolism for "rebirth" would be nice to hit 600+ just in time for Mark's birthday weekend hehe.

[bboyalan]

Another update:

I applied my fixes underhood and AEM tweaks earlier today. She is holding better up top with 28-29psi instead (1-2 gain), but the overall improvement is still not quite right. My next steps will be compression and cylinder leakdown tests to gain some insight. I am curious if exhaust reversion is an issue and/or cam timing as we already discussed.

[bboyalan]

"More progress! 538AWHP//602AWTQ VD SAE (+21//23 U/C) @28psi! The curve has improved noticeably after swapping-in the Panda's old coilpack that tested slightly better - primaries anyway.

AEM adjustments were made now that I am revving her out more along with minor things underhood (wrap, shields, etc.) I still have more testing/diag to get out of the way. More to come!"

[bboyalan]

*whew* warm day in the 80's today. Fortunately, I had some shade from our tree after yard work haha.


"Multiple 35psi pressure-tests ("BLT") on HOT motor."


"I guess we literally "blew the welds on the intake" LOL!!!! FFS"


"I also re-confirmed that the timing sync was straight just to be safe."

//edit//


"I figured that this would be brought up, so I tried again without the bolt/hole soaked."

[futurevr4man]

You can see where the lack of weld is. That SUCKS!

[J-Groove]

You can see where the lack of weld is. That SUCKS!

Man, that sucks.

-John

[bboyalan]

As crappy as it is, I am just glad that I caught it. We may be reverting back to OEM TB+upper plenum for the meantime to complete this tuning phase and progress.

This was my response to Matt on the other board:

Might have to weld around on the inside to seal it. No fun.

Yeah, if I had to guess, then that would be it. IDK if the leak continues around the runner toward the back. I have it documented in video for whenever I compile and upload the progress.

Seller/Stock image:


Sadly, the 70mm TB also showed a small leak on the TPS side; it supposedly received the "fix" that was advertised on here. Other than that, everything else was solid including both KV's.

[oohnoo]

Interesting. I have one of those PNT Plenums also. Looks like I"ll have to pressure test mine before I install it for peace of mind.

[bboyalan]

Interesting. I have one of those PNT Plenums also. Looks like I"ll have to pressure test mine before I install it for peace of mind.

Bob! Do you actually still have yours? I thought you sold it years ago lol. I mentioned you somewhere (FB?) about being one of the few/only people with the TB+PNT plenum combo, but I honestly thought you had sold 'em before putting to use.

I did suggest to Mark that he send his to you for inspection+repair, if necessary and possible =P I will eventually remove it again so that I can take a closer look at the inside.