I have a problem, based on the mods in my sig do my numbers seem weak? 330 rwhp and 344 rwtq seems pretty weak after dyno tuning. Arlington Motorsports tuned it, and made it run a little better but it just feels weak. I have heard that I should be up around 360-370. I have a set of 5.3 heads and I am going to get an ls6 intake and a g5x2 cam kit, but if I have a problem somewhere else I want to fix it before I do anything else. Any and all input is much appreciated!!!

 

You mentioned you have 5.3L heads???? What are done to the heads..? If nothing then that is your problem. The stock valves on 5.3L heads are smaller than the stock valves on 5.7L heads.. Now if you have work done to the heads. Your numbers look like DOO DOO.. Was this a Mustang Dyno? The ls6 intake is only going to pick up say 15rwhp.. Your 3.73 gears are not hurting you that much.. What type of dyno was this..? We have local cars with bolt ons with better #'s than yours and I live in a low dyno area..

 

Also is this M6 or A4?

 

The heads aren't on the car yet, they are getting the new valves installed this week. It is a 6 speed, sorry for the confusion I'm kinda new to this. thanks for the quick replies

 

Just to give you an idea of what you should be dyno'ing.. My first setup was the T1 cam.. B4 tuning I dyno'd 372rwhp/360rwtq. After tuning and less mods than you I dyno'd 390rwhp/380rwtq.. I added a pulley and did not gain anything.. Subtract the ls6 intake and you should be 375rwhp..

 

Any ideas what might be wrong or what I should look into?

 

99HUGGSS: find out what kinda dyno you were on
Mustang and Dynomites show less power than the "typical" Dynojets

 

What valve springs are you using on your stock heads? Who installed the cam?

 

It was a "dynojet" and I have comp 918 springs. I will post a picture of my dyno sheet. The cam was installed at a GM dealership before I bought the car.

 

dyno sheet here is a link to my dyno sheet if that will help anyone, and thanks again for the replies!!!

 

I A-Tapped this car at the track last night to see what the problem might be. Here is the log. The LTFTs are a little high and it does have ported MAF ends on the car, but he said they were on it when it was tuned.

RPM MPH Timing KR B1S1 B2S1 ECT IAT LTFT-B1 LTFT-B2

1st gear
1728 000 40.0 0.0 0.015 0.020 207 149 7.0 9.4
2607 000 39.5 0.0 0.265 0.025 207 149 9.4 9.9
2864 000 24.0 0.0 0.935 0.930 207 149 5.5 7.8
4585 002 25.0 0.0 0.925 0.930 207 147 5.5 7.8
4292 032 24.5 0.0 0.925 0.925 207 145 5.5 7.8
5205 039 24.5 0.0 0.930 0.930 207 144 3.9 7.8
5698 042 32.5 0.0 0.940 0.940 207 142 5.5 7.8
5648 042 24.5 0.0 0.945 0.930 205 138 3.9 4.7
5844 043 24.5 0.0 0.925 0.925 207 138 3.9 4.7
5198 038 24.5 0.0 0.940 0.920 207 133 3.9 4.7
5720 043 24.5 0.0 0.920 0.910 207 129 3.9 4.7
6141 045 37.5 0.0 0.805 0.710 207 126 7.0 6.2
2nd gear
5806 047 26.0 0.0 0.960 0.915 207 124 7.8 7.8
5348 047 38.0 0.0 0.200 0.300 207 122 7.8 7.8
4196 047 38.5 0.0 0.155 0.460 207 120 8.6 7.8
3464 047 39.5 0.0 0.195 0.155 207 118 7.8 6.2
3932 046 25.0 0.0 0.935 0.925 207 118 5.5 7.8
4567 050 25.5 0.0 0.935 0.910 207 117 3.9 4.7
4874 055 25.5 0.0 0.935 0.910 207 113 3.9 4.7
5218 058 25.5 0.0 0.920 0.895 207 111 3.9 4.7
5579 062 26.0 0.0 0.930 0.895 207 109 3.9 4.7
5900 066 26.5 0.0 0.905 0.885 207 106 3.9 4.7
6098 068 37.5 0.0 0.785 0.720 207 104 7.8 7.8
3rd gear
4749 068 27.5 0.0 0.935 0.915 207 104 3.9 5.5
4675 071 27.5 0.0 0.930 0.915 207 102 3.9 4.7
4888 075 27.5 0.0 0.925 0.905 207 100 3.9 4.7
5070 077 27.5 0.0 0.910 0.905 207 099 3.9 4.7
5256 080 27.5 0.0 0.905 0.905 207 099 3.9 4.7
5436 083 25.5 2.4 0.910 0.900 208 097 3.9 4.7
5594 085 24.0 3.8 0.910 0.895 208 097 3.9 4.7
5750 088 24.0 3.4 0.910 0.880 208 095 3.9 4.7
5923 090 24.5 3.3 0.910 0.900 208 095 3.9 4.7
6062 093 24.5 3.0 0.905 0.905 208 093 8.6 7.8
4th gear
5528 093 37.5 0.0 0.545 0.420 208 091 6.2 5.5
4841 094 27.5 0.0 0.915 0.905 208 091 3.9 4.7
4849 096 27.5 0.0 0.915 0.895 208 091 3.9 4.7
4953 098 27.5 0.0 0.900 0.875 208 091 3.9 4.7
5065 101 27.5 0.0 0.890 0.875 208 090 3.9 4.7
5146 103 27.5 0.0 0.890 0.870 208 090 3.9 4.7
5249 104 27.5 0.0 0.905 0.870 210 088 3.9 4.7
5204 104 38.0 0.0 0.630 0.410 210 088 7.8 7.8
4336 104 38.5 0.0 0.130 0.305 210 088 8.6 7.8
3566 103 39.0 0.0 0.615 0.610 210 088 8.6 7.8
2967 103 39.5 0.0 0.795 0.805 210 088 8.6 7.8

 

Dang. I surmised your tune was bad even before I got to your last post . . . then my suspicions were confirmed.

The LTFT'S aren't just a little high . . . they're wrong. You should have 0 LTFT's at WOT.

Do a part-throttle log using the following parameters:
Fuel Cell Trim, B1S1, B2S1, LTFT's, KR, Engine Speed, and map. Create an excel file and average the ltft's in fuel cells 6 thru 14. The part-throttle lterms need to be negative in order for them to go to 0 at WOT.

Once this is accomplished you can then do a log at wot:
TPS%, Fuel Cell Trim, O2B1S1, O2B2S1, KR, timing, engine speed, and delivered tq engine to tranny input ft-lb.

You could get a lot of helpful assistance with tuning here:
LS1tuning.com

 

Your numbers do seem low for what you have, your tuner must not have set enough timing.

BTW - You don't have to have your part throttle Ltrims negative for your WOT to be at 0. Mine are positive and it locks to 0 at WOT everytime on and off the dyno...

 

GET RID OF THAT CLUTCH!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! !!!!!!!!!!!!!!

BIGGEST CROCK OF **** IN THE WORLD!!!!!!!!!!!!!!!!!!

dont worry I waisted the 600 bucks to find out for myself too!

 

Interesting.

In which cells did you average your lterms?

 

tja
too just above

 

And make sure you open the 5.3 chambers to a 3.900" bore size! We have a CNC program for doing this that costs $100, but it must be done before the valve job is done. Hope this helps.

 

Get rid of that ported MAF and run a descreened stocker. I picked up over 35RWHP throughout the curve and ~30RWHP peak swapping out just my ported MAF and doing a single tuning change. Turn off COT if you have ORY as well. Timing should be 28+ degrees from 4000rpm and up and AF around 13.0:1 (depending on octane and what heads you are using)
Chris