xr4tic

I made two 3rd gear runs, running 17-18psi, water injection was OFF. EGTs slowly climb to around 1500F or so at redline.

If you notice, I'm maxing the MAF out at around 5600 RPM. Once that happens, the ECU has no clue how much air is entering, and maxes the pulsewidth out. This is going to be a problem once I really start cranking the boost up.

I'm trying to figure out how much more boost I can add. I'm thinking that as long as the O2 voltages are 0.820V or higher, and the EGTs stay under 1600F, I should be OK.

I'd like to see what some of the other big turbo kits are getting for O2 voltages though for comparison.

C_MAF is Corrected MAF (2.44" vs. 2.875" housing)

_RPM, __MAF, C_MAF, __O2, Duty

2640, 046.87, 065.07, 0.670, 08.19
2920, 067.29, 093.42, 0.815, 12.67
3160, 099.31, 137.88, 0.860, 15.74
3520, 114.65, 159.17, 0.855, 15.49
3840, 124.23, 172.47, 0.840, 15.17
4120, 131.73, 182.89, 0.835, 14.91
4440, 144.17, 200.16, 0.830, 15.04
4800, 153.68, 213.36, 0.825, 15.36
5080, 161.59, 224.34, 0.825, 15.68
5360, 168.19, 233.51, 0.830, 15.87
5640, 173.68, 241.13, 0.825, 16.32
5880, 179.93, 249.80, 0.840, 16.32
6120, 184.03, 255.50, 0.850, 16.32
6320, 184.86, 256.65, 0.850, 16.32
6520, 185.97, 258.19, 0.855, 16.32
6720, 186.94, 259.54, 0.860, 16.26
6960, 187.08, 259.73, 0.865, 15.74


2680, 055.90, 077.61, 0.830, 11.01
2920, 078.96, 109.62, 0.855, 14.40
3400, 115.21, 159.95, 0.875, 16.13
3480, 114.93, 159.56, 0.840, 16.32
3840, 127.78, 177.40, 0.830, 15.55
4200, 138.19, 191.85, 0.825, 15.30
4560, 149.23, 207.18, 0.820, 15.36
4920, 159.03, 220.79, 0.820, 15.87
5240, 167.08, 231.96, 0.820, 15.81
5520, 171.73, 238.42, 0.820, 15.81
5760, 179.17, 248.75, 0.840, 16.32
5960, 182.36, 253.18, 0.850, 16.32
6160, 182.84, 253.84, 0.850, 16.32
6360, 183.12, 254.23, 0.850, 16.32
6480, 183.96, 255.40, 0.845, 16.26
6720, 186.73, 259.24, 0.845, 15.87
6880, 186.73, 259.24, 0.845, 15.68

Audi2ptzero

and use a slightly larger injector or use a adjustable fpr to bump the pressure up a few lbs.

The good thing is that your still running good #'s at the 02, so if you bump up the boost a little at a time and still try to keep the high rpms above the .82 you should be fine, I think the fuel maps in the high rpms are still raising so that might be why it is still adding more fuel after you reach the max reading of the maf.

CharlieGSanD

they got plenty of logs, problem is there all on the S-III Board

SameerP

Talk to Bryan (Skabaru) though, if you can tell him what we need to log, then i can meet up with him and get some logs for you, we'd be happy to help...i have a T28 kit btw.

Also, if you go with stand-alone that uses a MAP instead of MAF readings will you get around that 5600rpm bottleneck?

Cheers,
Sameer

Brent V

I fixed my little vac leak and the car is running better now so I hopefully can take some logs tonite. What specifically are you looking for? I'll just log everything and that way you'll have it

xr4tic

What I'm planning on doing is having my current 3" housing flowed, then adding 25% to it.

That would enable me to drop in 550 injectors in place of the 440s, and it should be very close. I'm guessing it would run more timing this way, but I have a FMIC, so hopefully the extra timing won't cause problems.

xr4tic

RPM, MAF, and injector were on block 002 and O2 was 031 on my non-DBW.

xr4tic

it could be tuned for a different MAF fairly easy.

With the proper chip, it would be fine. I guess that's what happens when you flow as much air at 5600RPM that a T28 1.8T flows at 7000 RPM

SameerP

bastage!

SameerP

what is the profile like for you, when do you get boost? I know you are not tuned yet, but when is boost onset, and what is the final hp estimates you hope to hit?

Cheers,
Sameer