It's finally spring here in MN. I've been busy retuning the car. Here is log of one of my runs where i enabled the dyno math library in AEM.
From the responces in the AEM form about the Dyno math have been good.





in text form
Time/s _Wheel_HP Engine Load Engine Speed O2 #1
187.900 133.39326 -4.59814 1542.96875 10.69406
188.100 134.35278 -5.43563 1583.98438 10.75125
188.300 136.08972 -5.76764 1617.18750 10.86563
188.500 138.56198 -5.95541 1638.67188 10.92281
188.700 141.63633 -0.16506 1736.32813 11.03719
188.900 145.21326 -0.06435 1798.82813 12.92438
189.100 149.23666 -0.00653 1822.26563 13.03875
189.300 153.71801 0.06559 1929.68750 13.03875
189.500 158.66691 0.19554 2001.95313 12.63844
189.700 164.08408 0.28260 2070.31250 12.92438
189.900 169.90706 0.41255 2160.15625 13.09594
190.100 176.06202 0.54249 2244.14063 12.69563
190.300 182.57816 0.67244 2318.35938 12.69563
190.500 189.49082 0.83097 2417.96875 12.63844
190.700 196.81723 1.03303 2492.18750 12.81000
190.900 204.56702 1.27863 2587.89063 13.26750
191.100 212.74782 1.56776 2675.78125 13.72500
191.300 221.35446 1.91406 2775.39063 13.43906
191.500 230.38469 2.28895 2871.09375 12.92438
191.700 239.83767 2.73726 2976.56250 12.75281
191.900 249.69931 3.24210 3093.75000 12.40969
192.100 259.94844 3.96394 3199.21875 11.83781
192.300 270.56845 4.65720 3333.98438 11.55188
192.500 281.51891 5.72600 3458.98438 11.72344
192.700 292.81010 6.86627 3603.51563 11.60906
192.900 304.43514 8.16572 3742.18750 11.83781
193.100 316.35281 9.72506 3902.34375 11.95219
193.300 328.54392 11.63070 4125.00000 11.49469
193.500 340.99377 13.73906 4320.31250 11.38031
193.700 353.62853 15.13922 4556.64063 10.86563
193.900 366.17440 14.80721 4798.82813 10.69406
194.100 378.27292 14.41737 5000.00000 10.57969
194.300 389.55826 13.83977 5244.14063 10.57969
194.500 399.73302 13.30569 5392.57813 10.57969
194.700 408.87401 12.98798 5509.76563 10.63688
194.900 417.09937 12.39608 5728.51563 10.69406
195.100 424.38662 11.90489 5843.75000 10.63688
195.300 430.66180 11.47217 6041.01563 10.63688
195.500 435.80772 10.98098 6177.73438 10.63688
195.700 439.77488 10.80815 6365.23438 10.69406
195.900 442.67469 10.30266 6472.65625 10.57969
196.100 444.75562 10.02848 6560.54688 10.63688
196.300 445.13140 9.82577 6691.40625 10.57969
196.500 443.41797 9.62435 6767.57813 10.57969
196.700 439.89300 9.36446 6912.10938 10.63688
196.900 434.61684 9.19098 7117.18750 10.57969
197.100 429.34195 9.14745 7072.26563 10.57969

As you can see it calculates 445 whp at 6560, and 427wtq at 3800. Once i get the AFR dialed in a little closer i'll get her to the dyno to see how acurate it is. 445 whp + 15%-20% drivetrain loss = 511-530 fwhp. close to 500hp Pettit claims they get. So I feel it is fairly acurate.
This is a stock ported stock turbo'd 20b w/ 550 pri & 1600 sec inject, front mount intercooler, dp, Resonated MP, Apex-I GT exhaust, AEM computer.

I have the stock turbos maxed. And the Duty cycle on the boost solinoid
is at 90% after it hits 1 bar. As you can see the stock turbos quickly run out of steam after 5. You can feel it in the car as a quick ruch then it tapers off.

enjoy.

Jered

 

Nice job!
Nice numbers!
Glad to hear the AEM is finally working in this configuration.


-Ted

 

I weighed my car last night at a local grain elevator after hours. They have the display visible through a window. A choaking 2930lbs w/ 1/2 tank of gas. ouch!!!. I hope the truck scale was off, but it did read zero after i pulled off.

 

awesome.

lets see some pics

 

 

OMG.. stock turbos 450whp and 425 ft/lbs
@ a bar? 550's w/ 1600cc secondaries.
Damn i really need to rethink the single turbo setup for a few months.
im estimating a 2200lb weight on my setup so 450whp will be quite a handful at 6500 rpm.
great job is an understatement... be safe on those roads

 

OMG.. stock turbos 450whp and 425 ft/lbs
@ a bar? 550's w/ 1600cc secondaries.
Damn i really need to rethink the single turbo setup for a few months.
im estimating a 2200lb weight on my setup so 450whp will be quite a handful at 6500 rpm.
great job is an understatement... be safe on those roads

 

**** .,, thats one clean *** car dude awsome numbers , damn , nice job ....at what boost level where those runs at??

 

niiiice! everyone has been bashing on the twins for so long... im glad you have shown they are not as bad as everyone thinks. (you are running them in parallel right?). anyway nice job!

this is off topic, but i just pulled my 20b motor from the front clip, and testfitted the alamorotary DP... (i think you have that one if memory serves) anyway, the coolant lines for the secondary turbo cant be connected cause they now longer reach w/ the DP in the way... anyway just wondering how you solved this problem? ok back on topic.......

 

dyno! dyno!

 

3300 - 4.6psi
3600 - 6.8
3900 - 9.7 <- Peak Trq.
4100 - 11.6
4300 - 13.7
4500 - 15.1
4800 - 14.8
5000 - 14.4
5200 - 13.8
5500 - 12.9
5700 - 12.3
6000 - 11.4
6200 - 10.9
6400 - 10.8
6700 - 9.3 <- peak hp

 

really nice!!!! Great job!

 

thanks guys.

The turbos die out quick. I have the boost AVC-R set to 90% dutycycle at 5k-8k. They just cant flow enough to make more power. I will have her on a dyno soon. I just want to work a couple tuning hick-ups that are left.. I've put on 500 miles or so the past week getting the drivability descent.

 

With virtually no boost below 3k rpm's, hows the low end performance as compared to the seguencial twins of a 13b? Does the 20b's torque make make-up for the lag? I'm asking because George Samuels 20b "Bermuda" with non seguencial twins can be driven in 4th gear at 12mph with no need to down shift.

Oh yea..... What do your A/F ratios look like?

 

The torque is decent, but i'm used to a v8( I also have a Camaro with a built fuel unjected 350). On the highway you can leave it in 5th pass people with little effort.

Afr is ~10.6 under boost. You can look at the text log in the first post, It gives Wheel HP, load(boost), RPM, AFR. I know i can lean it out a bit to get closer to 11.0 and gain some power but I would rather play it safe.

 

I'm going to bug you for an in car video again.

I feel the same way.