Friday, August 27, 2010

Intake Setup

As you probably now know, SP has been running on the Jenvey Dynamics Individual Throttle Body (ITB) setup. Here is a breakdown of the bits that is required to complete the install.

1. Jenvey Dynamics Manifold to suit SF throttle bodies for Proton/Mitsubishi (part no: MPN01)
2. Jenvey Dynamics SF throttle bodies - 45mm tapered x 4 nos (part no: SF45)
3. Jenvey Dynamics Air horn (part no: AH45x60)
4. Jenvey Dynamics Fuel Rail (part no: SFR4/88)
5. Jenvey Dynamics Fuel Rail Mounting (part no: SFRC2)
6. Jenvey Dynamics Linkage Kit (part no: CLS1)
7. Jenvey Dynamics Linkage brackets and rod - SF (part no: LBF2)
8. ACT dry carbon airbox
9. Bosch 412cc Top Feed, High Impedence Injectors
10. TPS - Colvern CP17 - Motorsport spec (part no: TP1)
11. Phenolic gasket
12. Earls Swivelseal fittings and hose for fuel supply and return.

I actually bought three sets of airbox, one from Pipercross which comes with its own filtration system and also one from K&N (universal airbox), but both of them did not provide what I was looking for. But it helped to develop the current box in terms of available space and design. Luckily with parts bought from UK, if not used can be returned.

The JD throttle bodies are of a taper design, so at the throttle plate(butterfly) it is 45 mm and 48mm at the inlet of the body. This allows for high velocity through the port and promotes better combustion as well. The air horns were also changed due to its length, it was suggested to run longer horns but due to the space constraint I have gone for the 70mm long air horns instead of the 120mm ones. They also had a CF version of the air horns, but I was advised against it, as if there is crack or damage to the horns, it will be sucked into the engine and destroying it as well. So I decided to stick with the aluminium horns.

Fitting was not straightword unfortunately as SP cylinder head was massively ported and the inlet port of the head was a lot larger then the JD manifold. So we had to do a lot of customisation work to get this fitted and port matching to suit. I was really happy with the work done by GT Auto to ensure it was all done properly and professionally.

I will let the pictures speak for themselves


Manifold - View from Throttle Body end

Manifold - Top View. Note the Jenvey casting between cylinder 2 & 3

Manifold - View from cylinder head side. We had to do a lot of modification on this side to get it to fit on SP
SF Throttle Bodies - 45mm tapered bore

SF Throttle Bodies - view from side. For turbo high power application you can order the same body with two injectors.


60mm Air Horns

Colvern Motorsports Spec TPS

ACT Dry Carbon Airbox and backplate with 4in inlet

Airbox and backplate fitted together

Bosch 412cc Injectors

Manifold, air horn and ITB all mocked up together. Notice the longer air horn which was purchased initially

Another view this time with Jenvey Dynamics filter. Backplate not shown. The filter and backplate are actually from Pipercross

The other airbox which I bought

Manifold and ITB fitted on the engine after massive modification to the manifold's flange