UPDATED IN BOLD
Yesterday i finished up the pill mod going for the 0.035" welding tip. My car from a pull of about 3500RPM or greater would spike to about 25PSI and hold 21PSI all the way to 7000RPM. If i tried a pull from a lower RPM it would peg the boost gauge at 30PSI (HPT limit is 255KPA = ~22PSI and my logs showed it maxed out through out the pull). This landed me in limp mode. Turning the igniton on and off 3 times got me out of it. Still not wanting to risk blowing something up boosting who knows how much past 30PSI, i just installed the 0.045" welding tip. I have not driven the car yet but im definitely hoping for less spike but still maintaining 21PSI to 7000RPM. Prior to this mod i was boosting 22PSI and tapering to 21PSI by 7000RPM. The cost of the 2 welding tips including tax came out to an even $3. I will post my experience with the 0.045" tip when i get some good runs in. Other than more boost i have noticed essientially all the lag i had dissappear between the pill and vacuum tank delete. Next is the dyno...

I've noticed now in my 2nd gear pulls that boost is tapering off. I believe its the learndown/torque management acting up. I experienced similar results with the installation of my catless downpipe. On my very first 3rd gear pull, i hit 26PSI and held 24PSI to 7K. Tomorrow will confirm my suspicions if i taper off to 21PSI by 7K in 3rd gear.

UPDATE: 3rd gear pulls still netting 25PSI and around 24PSI to redline, 2nd gear pulls still taper off to 22-21PSI at redline.

 

what the heck did u do with the welding tips? what mod is this? i can get free ones since i work at a welding shop, but i never heard of any mod involving a welding tip.

 

You have to insert the welding tip (pill) into the line that comes off the top of the turbo scroll area before the wastegate solenoid. The line supplies the WG vaccuum to open based on ECU command. By restricting the wastegate opening, you create mucho boostage.

I tried the .035 for a day or two but when it exceeded 30 psi, I took it out.

Never got back to trying an .045, I have one, it's just so hard to get to it from the top or bottom.

Tuned for 22 PSI gets me 35 MAF lb/min flow. I'm happy with that for now. The harder you work the turbo, the greater the chance of blowin' it up. If you get 24 PSI, let me know.

 

I still get 24PSI til redline. I have not tried a low RPM pull yet. My pill is installed in the boost reference line thats below the turbo inlet. NOT from on top the of the turbo. I was adviced this way by BYT *SS* Turbo.

 

We're talking about the same line from the same tuner... just different ways of describing it. Pictures are priceless.

Thanks for posting the pic.

 

IM glad to see you experimenting with it Jared. Once you get it worked out, come down. I'll throw you 3 pulls for free. (since we ran out of time and never got to do a high boost pull)

 

How are you guys running up to 7k RPM's without losing boost anyways. I thought our turbo only held boost til 22psi or so?

 

I have the .035 in my car and it will hold 24-25psi until 5800-5900rpm and start to drop down to 22 at about 6300rpm. A low rpm 3rd gear pull will show 30+psi spike on the gauge...I did that once and once only. If I hit on the car in third I make sure the rpm is past 4000rpm and it will hit 25psi.

Part throttle is way too touchy with the tip inserted. It doesn't take much to be boosting 5psi around town when normal driving. I'm keeping it in for now because i'd like to hit the track one of these weekends...after that it's coming out or a bigger tip is going in place of the .035.

 

Heck no bud, the stock turbo can produce upwards of 35psi as evidenced by it's compressor map here:



But as you can see, the width of the map up that high is very narrow.

For reference the converted units for this table equate to about 36 lbs/min at the right hand edge of the map

240kpa at sea level provides the maximum width of map.



This is Jared's new turbo map. As you can see it gives up some of the high pressure ratio for a wider map.
It flows out the farthest at 260 Kpa at sealevel and hits maximum reccommended tip speed (converted it's 168,500rpm) at 41 lbs/min.

 

I took the .035 out, ...got bored with the car again and then put it back in same results all of you guys are seeing. If that .045 makes a big difference, post it up for sure. I thought about putting a ball valve or maybe an aquarium valve on the line, but cars kinda parked for Winter now it seems. Honestly my car was eating the ridiculous boost like a champ, very little knock... direct injection amazes me. If the turbo shells out, oh well... looking for an excuse to swap it out.

Just hope we see some better boost control solenoid code out of HPT in the next decade. Few people say this can all be done with DAL work, but I've not been able to exceed 22-23psi with the DAL. All stock intake/IC tract not helping that I'm sure.

 

You cannot exceed 22psi with DAL work... you can get spikes like I do... 24-25psi spikes but settles again at 22.

But the reasoning is because the electronically controlled wastegate is only 80% duty cycle... so it's basically shorting us 20% worth of boost!

 

Ahhhhhh ok, I'm clear now. For some reason I misunderstood an older post of yours... thought you were holding 24-25 though the low/mid RPM band.

Yah, 70-80% duty is really cramping our style

 

Got some good runs in on my way in from work. With the 0.045" welding tip i never spiked past 26PSI, and only saw 26PSI starting at a 2000RPM pull. Pulling at high 3000's i would spike to 25PSI and ride out 24PSI to 7000. All in all, the 0.045" tip has all the plus's of the 0.035" tip and none of the negatives of it either.
To BTF: Rick i would love to take you up on that. I will see what i can pull off. I found out 2 days ago that i'm getting picked up staff here, so i'll be here for the next 2 years.

 

Even with the wastegate fully closed, your boost will drop to ~22psi in the higher RPMs. I could only get 17psi at 6500 RPM with our ported head.

 

doesn't surprise me with the higher flowing head... we should loose some boost... but pick up power overall!

I just need more fuel... my car was amazingly fun at 20* of timing. But it's getting too cold here for it now!

 

Yeah my car is NOT the happy at all with this cooler weather

Same power with lower boost sounds more race track friendly.


MMMmmmm engine longevity with relentless beating...<3

 

Glad to hear that, now that the new intake is dialed in, I'll try it next opportunity.

That sounds a little more friendly.

 

UPDATE: the day after my first set of pulls boosting 24PSI through out the band in 2nd gear only, i now will hit 24PSI and taper down to about 21PSI by 7K. My only guess is learndown/torque management is still affecting my car. I had similar experiences with my catless downpipe. On a different note, 3rd gear pulls spike to 26PSI and hold about 24PSI to 7K. Ill see what i get with more pulls tomorrow.

 

25-26 is way more doable than 30+

 

So are you guys custom tuning for the "pill" or can a "canned" tune person also do it?

 

With the "pill" you need to pull timing out of your tune (I'm running 17* right now) since you will get KR. My tuner did a conservative 14-15* of timing in areas with the .030 tip. The car was a beast, but putting down 30psi didn't do it for me. I'll have to invest in the .045 tip. I like the 24-25psi range...

 

Are the IAT's higher when you saw less boost? Just curious.

 

i don't know why but i did the vacuum tank delete mod and i am hitting 26 psi now. 70 degrees outside and btw i have a trifecta tune.

definitely more power tho. My tires are mad at you lol

 

I wouldn't recommend doing this unless you have hptuners.

 

1st post updated