Dyno results from today...

[GTi30R]

These were the results from the dyno today.  Here is the list and the chart of the info:

Dynojet Research Inc.
Run Name: C:\Documents and Settings\Matty G\Desktop\Nate A\RunFile_011.drf
Run Title:
Run Notes:
Run Date: 5/12/2005 4:54:32 PM

RunFile_011.drf: 76.24°F 29.46in-Hg Humidity:24% STD:1.02 Average Gear Ratio:53.10

          s         RPM x1000 hp        ft-lbs    Air/Fuel
          0.14      3.50      N/A       N/A       14.78    
          1.00      3.70      103.85    147.41    14.47    
          1.35      3.80      114.99    158.94    14.32    
          2.24      4.10      150.19    192.40    13.81    
          2.50      4.20      163.00    203.83    13.62    
          2.75      4.30      177.59    216.92    13.35    
          3.18      4.50      210.44    245.61    13.02    
          3.38      4.60      227.65    259.92    12.87    
          3.55      4.70      242.40    270.87    12.83    
          3.77      4.80      249.62    273.13    12.90    
          3.95      4.90      265.35    284.42    12.89    
          4.11      5.00      274.66    288.50    12.79    
          4.30      5.10      285.16    293.67    12.78    
          4.48      5.20      298.66    301.65    12.70    
          4.64      5.30      309.05    306.25    12.66    
          4.83      5.40      309.23    300.76    12.79    
          4.99      5.50      318.29    303.95    12.85    
          5.17      5.60      320.18    300.29    12.79    
          5.36      5.70      319.14    294.06    12.74    
          5.54      5.80      322.60    292.13    12.74    
          5.72      5.90      327.49    291.52    12.62    
          5.91      6.00      335.87    294.01    12.58    
          6.09      6.10      334.76    288.23    12.60    
          6.29      6.20      331.14    280.51    12.69    
          6.49      6.30      339.69    283.19    12.64    
          6.69      6.40      329.03    270.02    12.60    
          6.89      6.50      326.23    263.60    12.62    
          7.11      6.60      330.30    262.85    12.61    
          7.31      6.70      325.26    254.97    12.61    
          7.53      6.80      319.12    246.48    12.62    
          7.76      6.90      326.15    248.26    12.57    
          8.00      7.00      312.48    234.46    12.62    
          8.26      7.10      312.64    231.27    12.55    
          8.50      7.20      315.82    230.38    12.59    
          --------- --------- --------- --------- ---------
MAX:      8.50      7.20      339.69    306.25    14.78
MIN:      0.14      3.50      103.85    147.41    12.55



The car has a GT30R set at 22psi with 112 octane.  Full 3 inch exhaust WITH cat, Revo BT, ect.  We were still getting timing retard up to 12 degrees once full boost hits, so we think it's the gap on the spark plugs needs to be worked out.  It was at .28, but I went to the dyno with nebulight, and he said he always run the stock gap out of the box for his autolites, which was around .35 and he didn't have any timing issues.  So we're going to put in new plugs to see if it helps with timing retard, and hit up the dyno in a few days...or hours if they are still open.

[MrSkills68]

some sick #s man keep the tuning up...

[Dizzy]

What trim/housing?

[nebulight]

What trim/housing?

It's a GT30-12 with a .48a/r 5 bolt.  This car has WILL put out the numbers.

[fast_a2_20v]

too fuckin lean man all the way across the board especially your way too lean around peak torque.

[elitedübs]

nice #'s.

[ricerocket]

Yeah, I agree you should tune your AFR a little more conservatively, especially for a street driven car.   And your buddy's right, the charts point to some spark breakup issues.  But at .028 already, it seems odd.  I can't see running .035 any better if you're already having breakup.  Maybe they're just old and fouled?

[nebulight]

too fuckin lean man all the way across the board especially your way too lean around peak torque.

You think?  I tuned my car to be in the high 12s low 13s and I never had any issues with my car being too lean.  This car has a Cat and was a sniffer O2, so that could account for some error in reading, around .1ish Here is a graph of just the a/f, but the numbers are listed above:

[bobqzzi]

too fuckin lean man all the way across the board especially your way too lean around peak torque.

You think?  I tuned my car to be in the high 12s low 13s and I never had any issues with my car being too lean.  This car has a Cat and was a sniffer O2, so that could account for some error in reading, around .1ish Here is a graph of just the a/f, but the numbers are listed above:

]

What kind of timing?

[mj6234]

I think the cat is messing the readings. I have REVO BT and an in car wideband. A/F is 12.3 under boost. It bounces between 12.1-12.4. I am sure his is no different.

[GTi30R]

What kind of timing?

we had settings varying from 2-6 with the sp3, and we usually had timing retard between 6 and 12 across the board on every run...even with the 112 mixed in with about 5 gallons of 94. If anyone has any suggestions about how to fix the timing issue, please let me know asap. I know that Pat was having some of the same issues, so if anyone knows what he did to fix it, could you please let me know.

[fast_a2_20v]

with a 13:1 a/f and pulling a bunch of timing your turning your car into an oxyacetylene torch.... Not to mention the lean mixture could be compounding the timing pull issue.

There is PLENTY of power to be made at 11:1 - 11.5:1 why run so ragged edge...  

[GTi30R]

you have any suggestions....im running 580s on a 3 bar currently...i personally think its the cat...any other input?

and where do you see this 13.1  its less than 12.7 the whole way to redline with the cat in...???

[fast_a2_20v]

need to get a wb02 in front of th ecat one way or another to get a true reading...

and then if its still lean see about tweaking the software.

[puredrive]

I might be dynoing my car this saturday...this time i will log some of the runs

I will let you guys know..

[Don®]

Why not log block 031 and compare the values on your next dyno...

[mj6234]

For personal experience. using the tail pipe sniffer when running a cat resulted in an A/F reading that was about .5-.7 higher than actual. I have a dyno with the sniffer showing an A/F of 12.9. Wideband in the DP says 12.3. You are richer than you think.

[Don®]

For personal experience. using the tail pipe sniffer when running a cat resulted in an A/F reading that was about .5-.7 higher than actual. I have a dyno with the sniffer showing an A/F of 12.9. Wideband in the DP says 12.3. You are richer than you think.

Agreed...I had also compared them and found the same result of within .5

[Dizzy]

Are you running an intake?  Why is spool so late on the .48?  Sure there are no exhaust leaks and the intake isn't sucking up exhaust?  This might be fine on the street and you'd never know it but it would show up on a dyno and explain the timing pull.

[GTi30R]

I do have an intake on the turbo, and as far as i know there are no exhaust leaks, none that are noticeable anyways. i will go through the car today and recheck for any exhaust leaks and also it was suggested that i check knock voltages, does anyone know the block off hand for that?

[GTi30R]

one reason for the spool coming so late was that my freaking wastegate was opening early. I turned the gain down all the way downon my Profec, and it was still doing the same thing. I will take a look at the lines again today and compare to what Tial's site has listed, and what others have suggested.

[GTi30R]

I just logged block 020 which is what i thought the Knock sensor output is, and i am seeing 5.3-8.3 from 5k - 7k on cylinder 3 and 4. Nothing on the other two. What could be causing this, and how can it be fixed...today runs were made on 94 oct.

[Dizzy]

020 shows timing pull by cylinder in degrees.  026 is knock sensor voltage.

[chaugner]

here is what I personally feel is a good value for timing retard.

Run One, cold engine (cold as in at operating temp), Log one gear only, Values should not exceed a max of 3-4.

Run Two, log 2 consequtive gears (3rd and 4th) or run 2 of the same gears right after one another (if you do not have room), Values should not exceed 4-5 max and an average of 3.

Run Three, log 4 full gears (1st to 4th) to simulate 1/4 behavior. I tune for a max of 6.

Run Four, log 4 full gears, multiple times with decreasing of cooldown time in between each times. You should not exceed 8 being pulled here. This is for the spirited high rpm drives on the weekend.

Edit: I have done this on a ko3 with fmic. So BT application might differ slightly. Once ATP ships my stuff (how dare they make me wait) and I have it installed I will try the same on 2871r.

[GTi30R]

020 shows timing pull by cylinder in degrees.  026 is knock sensor voltage.

well, that makes me feel somewhat better, but a tthe same time...my clutch is now shot..and the car isnt making the power it should be and i have no idea why...ill log that block as soon as my battery gets recharged

[kilmer420]

.48 a/r make so much tq that it fried your clutch...

[GTi30R]

no...the shitty organic ecs trash clutch i put in it was what burned the clutch up...im sure the torque didnt help much either though...felt good until i shifted into second and the rpms shot up to 7k....same in third...still trapped 105 though....never knew quite where i really was though going down the track

[HatchedGTI]

when did you hit full boost (rpm)? For a fourth gear pull I agree with dizzy about it being kinda laggy. Perhaps you have a small boost leak that is makin the turbo work overtime to produce 22psi. This would explain your high retard values on race gas.