I went to my local tuner shop today (Modacar) to get a baseline dyno run done now that I have the Hondata reflash and replaced my 2 1/4" crush bent mid-pipe for a Comptech 2 1/2" mandrel bent full exhaust. My previous results (translated from a Dyno Dynamics dyno to DynoJet) were 153.2 hp and 127.4 tq with AEM CAI, DC header, crush bent mid-pipe and Hondata intake gasket manifold. It should also be noted that I have 17" rim/tire combo that are 1 lb lighter than stock, but throws the rotating mass out further which can lower the numbers marginally. I also have 2-piece brake rotors that are 1 lb lighter than stock also. So overall, I'd say the numbers should compare close to a person running stock wheels/tire/brakes. And my numbers do approximate out to others that have similar mods.
That all being said, I was figuring I'd put down around 155-160 hp and 130-135 tq. I figured that the Hondata reflash might give me a little gain on the top end, and the exhaust could lose me a little low end torque, but help in the upper end. After the first baseline run, I knew something was wrong. The two follow-up runs confirmed that I was WAY below where I should be power-wise. They were very consistent though, so I don't think it's a fluke. Here's a breakdown of my runs:
Run 1:
Max Power: 145.06
Max Torque: 125.46
Run 2:
Max Power: 145.74
Max Torque: 125.61
Run 3:
4th gear pull (vs. the others done in 3rd) showed a lower results, so they stuck with 3rd. This was just to see if it would make more power in 3rd or 4th.
Run 4:
Max Power: 145.41
Max Torque: 125.68
All of the numbers were done on that latest DynoJet with the latest software and are SAE corrected. The air/fuel ratio stayed between 14:1 and 12:1 (centering around 13:1 for the most part) on all runs after 3k rpm.
Given all that, I am very dissappointed! I know that the exhaust could be partly to blame, but others have shown gains with the Comptech exhaust. I think more likely it's the ECU reflash that's losing me the majority of the power. I knew before buying it to only expect about a 7hp gain at best, and no gain at the worst, but losing 7.5 hp and 1.7 tq by adding a reflash and ECU is just ridiculous!!!
I'll be e-mailing Doug at Hondata to get his opinion on this, but it may be a while since he's over in the U.K. right now. Something just isn't making sense here, but I can't figure out what. I'm just not a happy camper right now. I'll post the dyno page when I get home from work tonight.
Bookmarks