Focaljet - Ford Focus Forums - View Single Post - Suzuki GSXR 750 quad Throttle Body Install on 2.3 L Duratec

**JohnStranahan** · 07-03-2008, 06:04 PM

I expect little problems with the plastic manifold. I will be assembling the tubes to the manifold in the next few weeks. I think I found recently a good bit to port it.

I did encounter an unexpected lack of space during the trial fit of my Suzuki parts with the Focus Manifold off the car. We cut a few pieces off the Suzuki intake air filter housing to make it fit. I would be ideal to have just a little more clearance at the radiator for the air filter cover. This would allow sufficient space in front of the short rubber trumpets for good air flow (good high end) and increase the volume of the air box for a good low end.

After much thought I have decided to shorten the throttle bodies which will also help to simplify the project. Picture 1 shows a light green line where I plan to cut all the way around each of the throttle body tubes. The space between the green and black line will allow a hose clamp type of rubber sleeve connector. I will have to add another brace to the throttle bodies to connect all the bodies on the other side. 1 brace is saved. The pen in photo two shows where a 1/4 inch flat T6 Aluminum plate will be bolted. Two bolts per throttle body.
This will eliminate about 1.75 inch of length. That should be just enough to use at least the outer cover of the Suzuki air cleaner with few mods.

I plan to remove completely the secondary throttle plates. This engine is about double the capacity of the motorcycle and may not need them from a performance standpoint (bog at WOT). From an emmisions standpoint the close proximity of the primary throttles to the head may produce the turbulence required (made by the butterflies in the manifold closest to the head). Anyway I plan not to solve problems that may not exist at this point.
I will lose one set of vacuum ports. These can be added to the plastic manifold along with a small plenum. I have purchased a PCV eliminator kit which is basically a hose and filter so that air that enters through the PCV valve into the crankcase can be drawn filtered by my manifold.
John

07-03-2008, 06:04 PM	#142
JohnStranahan Junior Member Join Date: Dec 2004 Posts: 98	Re: Suzuki GSXR 750 quad Throttle Body Install on 2.3 L Duratec I expect little problems with the plastic manifold. I will be assembling the tubes to the manifold in the next few weeks. I think I found recently a good bit to port it. I did encounter an unexpected lack of space during the trial fit of my Suzuki parts with the Focus Manifold off the car. We cut a few pieces off the Suzuki intake air filter housing to make it fit. I would be ideal to have just a little more clearance at the radiator for the air filter cover. This would allow sufficient space in front of the short rubber trumpets for good air flow (good high end) and increase the volume of the air box for a good low end. After much thought I have decided to shorten the throttle bodies which will also help to simplify the project. Picture 1 shows a light green line where I plan to cut all the way around each of the throttle body tubes. The space between the green and black line will allow a hose clamp type of rubber sleeve connector. I will have to add another brace to the throttle bodies to connect all the bodies on the other side. 1 brace is saved. The pen in photo two shows where a 1/4 inch flat T6 Aluminum plate will be bolted. Two bolts per throttle body. This will eliminate about 1.75 inch of length. That should be just enough to use at least the outer cover of the Suzuki air cleaner with few mods. I plan to remove completely the secondary throttle plates. This engine is about double the capacity of the motorcycle and may not need them from a performance standpoint (bog at WOT). From an emmisions standpoint the close proximity of the primary throttles to the head may produce the turbulence required (made by the butterflies in the manifold closest to the head). Anyway I plan not to solve problems that may not exist at this point. I will lose one set of vacuum ports. These can be added to the plastic manifold along with a small plenum. I have purchased a PCV eliminator kit which is basically a hose and filter so that air that enters through the PCV valve into the crankcase can be drawn filtered by my manifold. John