As promised, here's my baseline dyno from my visit to TDC today in Spartanburg. Those guys know all about bisi and have his products on their own turboed D & B engines. Plan to have the bisi header installed in the next 2 weeks and another "after" dyno visit to compare the two.
Mods/maintenance items:
1. H23IM & TB with functional IAB's
2. Bisimoto heatshield gasket
3. True 3" CAI with Apexi Power dry filter
4. F22a6 cam with PT6 ecu
5. NGK wires with Denso Platinum TT stock heat range and gap LINK
6. DCsports header
7. OBX oe replacement cat
8. 2.5" I.D. mandrel catback with straight-thru muffler
9. NTK O2 sensor
244k miles on stock block.
Ambient air temperature ~60*f.
Dynojet dyno.
The sharp drop at 3,150rpms is detonation.
My Bisi header is designed for 220-230whp so keep that in mind. Also I'm running the stock a6 cam.
I installed the bisi header and a Magnaflow seamless 2.5" cat to dump into the same 2.5" exhaust used for the first dyno.
Ambient temperature was around 75* F.
Both the first dyno chart and one below are corrected to sea level with a smoothing of 5 so apples to apples there.
There are two dyno lines below, one (BLUE) is the bisi header setup on the pt6 ecu with wideband (you can see air/fuel VERY lean). This was dangerously lean so I had to get him to tune it. The other line (GREEN) is after tuning. Hubert couldn't squeeze much more out of the a6 cam. He fixed the detonation issue, made the engine alot smoother all around, adjusted iab opening rpm, disabled egr, set launch control at 5k, tuned for good fuel mileage, rev cut at 6,800, ecu shift light up at 6,500, etc...
The most power was made with timing advanced 2 degrees.
Ok, here it is.
Mods/maintenance items:
1. H23IM & TB with functional IAB's
2. Bisimoto heatshield gasket
3. True 3" CAI with Apexi Power dry filter
4. F22a6 cam with PT6 ecu
5. NGK wires with Denso Platinum TT stock heat range and gap LINK
6. DCsports header
7. OBX oe replacement cat
8. 2.5" I.D. mandrel catback with straight-thru muffler
9. NTK O2 sensor
244k miles on stock block.
Ambient air temperature ~60*f.
Dynojet dyno.
The sharp drop at 3,150rpms is detonation.
My Bisi header is designed for 220-230whp so keep that in mind. Also I'm running the stock a6 cam.
I installed the bisi header and a Magnaflow seamless 2.5" cat to dump into the same 2.5" exhaust used for the first dyno.
Ambient temperature was around 75* F.
Both the first dyno chart and one below are corrected to sea level with a smoothing of 5 so apples to apples there.
There are two dyno lines below, one (BLUE) is the bisi header setup on the pt6 ecu with wideband (you can see air/fuel VERY lean). This was dangerously lean so I had to get him to tune it. The other line (GREEN) is after tuning. Hubert couldn't squeeze much more out of the a6 cam. He fixed the detonation issue, made the engine alot smoother all around, adjusted iab opening rpm, disabled egr, set launch control at 5k, tuned for good fuel mileage, rev cut at 6,800, ecu shift light up at 6,500, etc...
The most power was made with timing advanced 2 degrees.
Ok, here it is.
Comment