Accord Euro Dyno Results

[Suntzu]

Awesome advice. The problem is that in my area I dont trust any of the exhaust joints I have spoken too...

Did you get a plug or your missing gap when the other dual exhaust is? What others mods have you got as im trying to get an idea of the improvements your exhaust might have had.

[Chris_F]

Awesome advice. The problem is that in my area I dont trust any of the exhaust joints I have spoken too...

Did you get a plug or your missing gap when the other dual exhaust is? What others mods have you got as im trying to get an idea of the improvements your exhaust might have had.

Yea, I'd say it's best to avoid custom exhausts untill you find a shop you can trust. It might be worth asking around at a few performance orientated workshops to see who they recommend.

I was trying for months to get the OEM exhaust plug to fill the gap. Cost was abot $80 but the guy who offered to send the part over backed out.

Mods at the time of dyno:

GruppeM intake
Maxim works exhaust manifold
JDM Accord Euro R metal substrate catalyic convertor (300 CEL i believe)
J's racing 60rs single outlet exhaust

Result = 124.5kw

The maxim works header made the most noticeable difference to power on the butt dyno. The gruppeM felt a bit better than the 60rs in terms of gains. The custom exhaust felt like a slight improvement when compared to the 60rs at high RPM.

If we conservatively say my car gained 12kw over a standard car, the break down in gains (in my opinion) from the parts would be:

Maxim works exhaust manfiold: 6kw atw
Gruppe M intake: 4kw atw
J's racing Exhaust: 2kw atw

With the larger 2.5" exhaust I might say 3-4kw, only a very slight improvement over the J's racing 2.35" (60mm) exhaust.

I definitely feel like the car needs a tune now to get the most out of the mods- the power band has really shifted to high rpm. If I can find my dyno sheet I'll post it up for you. You'll be able to see the big spike in power once vtec engages. A lower vtec point and some changes to ignition/fuel and VTC would make a world of difference. I would be hoping for at least another 10kw with my mods after tuning.

Summary: single outlet exhaust does no where near as much as a good header, but with tuning/reflashed ecu, your much more likely to take advantage of the increased flow it provides.