Skunk2 throttle body problem

[Hornet85]

I hade a Skunk2 74mm B-Series Black Series Throttle Body istaled on my B18c5 engine but i got 6hp les then with my Spoon 70mm Venturi Throttle Body any one have an idé wy? its done the right way with fuel and every thing, iam using a Mugen Pro Series Intake Manifold.

 

[AlaskaB16]

Bigger isn't better unless you have the correct set up going further down the line. You'll need a cam upgrade and a tune for your engine to know what to do with more air. You'll probably see even better gains going smaller yet. Bet you a cheeseburger.

 

[Hornet85]

my engine set up

B18C5 VTEC USDM DC2 Acura Integra Type-R
Displacement: 1,797 cc (109.7 cu in)
Compression: 10.6:1
Bore: 81 mm (3.2 in)
Stroke: 87.2 mm (3.4 in)
Rod Length: 137.9 mm (5.4 in)
Rod/Stroke Ratio: 1.58
Power: 195 hp (145 kW) @ 8000rpm & 131 lb·ft (178 N·m) @ 7500rpm
Redline: 8400rpm (Fuel cut-off @ 8500rpm) (Fjernet)
VTEC Engagement @ 5,700 rpm
Transmission: S80 w/LSD

JUN 4-2-1 Racing Manifold.
SRS Racing catbak system 3" going over to 2x4"
HKS filter.
home made 3" induction kit.
Skunk2 B16-B18C VTEC Camshafts Stage 1.
Greddy Timing Belt.
Password:JDM aluminum radiator.
Buddy Club Racing Spec Head Gasket 0.5mm B16/18.
RC Engineering 440cc Fuel Injectors.
Walbro 255LPH HP Fuel Pump.
AEM High Volume Fuel Filter.
NGK B-Series VTEC Spark Plug Wires, and plugs.
Mugen Pro Series Intake Manifold B18C.
Spoon 70mm Venturi Throttle Body - B-series.
Supertech High Performance Forged Pistons.

HKS Oil Cooler.
Spoon Engine Damper.
Mugen oil cap.
D2 Spec Radiator cap.
Tagiwa Radiator tigh down.
Tagiwa bults.
Tagiwa battery tigh down.
Buddy Club Racing Spec Battery.
AEM EMS - 96-98 OBD2.

Competition Forged Ultra Lightweight Steel Flywheel.
Exedy Hydro Tranny Stage 2 Clutch Kit - B-Series.

right now iam doing 244hp. plus the 50hp wet NOS kit

 

[CHILD]

is your intake manifold port matched to the larger throttle body? If not, all you did was create a wall for air to hit on its way into the intake manifold. DIsrupted airflow is not a good thing and can ruin whp gains.

 

[Hornet85]

its bored op to fit the 76mm if wanted.

 

[AlaskaB16]

So is that a yes? The bigger TB you have will match correctly to the IM you have? No "walls" as CHILD has said? I'm new to the Honda world but have been big in the scene for many other vehicles. I assume like any other popular tuner, you have to make ECU/timing corrections to see better gains. Just throwing parts in your engine bay with out a tune will not be enough. In most cases, you're going to start working backwards once you reach the wall of your factory tune. In your mod list, I saw nothing by way of an EMS or "tuned by X company". Worth the money IMO. Good luck.