Switch to SBD Motorsports tapered throttle bodies

[boss351]

Just wanting to post some information on some options for Duratec upgrades.

 

First stage:

 

I took my stock Duratec (R300 equivalent) setup and a couple of years back switched out the head to a Ford Racing head (bigger valves and a lot of machine work) and Stage 2 cams, uprated springs, retainers, bigger (green) injectors. I had to pocket the pistons for valve clearance and switched to an unlocked MBE ECU. Keeping the red line at 7250rpm with some tuning that took me to 163 rwhp.

 

Second stage (just completed):

 

Put in ARP conrod bolts (raising redline to 7750rpm), switched out intake to SBD Motorsports tapered ITB's, some more tuning (in sweltering heat) and now up to 176 rwhp.

 

Following some before/after dyno charts and pictures.

 

I think there is more power to tap bringing my compression ratio up (actually down on stock due to pocketed pistons), but leaving that for the future, pistons and uprated rods $$).

[boss351]

The SBD setup preferably runs a return line with a fuel regulator (brings down the 4.5bar stock pump to 3bar), I tossed the original fuel line (EFI quick fittings) and ran aeroquip AN6 hoses (the braided kevlar type). Modified the pump unit with a AN6 bulkhead fitting and plugged the old fitting, and just connected the pump to the backside of the bulkhead fitting. The return line feeds in to the tank beside the filler neck. I also snuck in a fuel pressure gauge on the return line end of the rail (before the regulator that is mounted on the chassis below).

[boss351]

The engine fired up first time (rich), here is what it first sounded like.

 

(timing is being advanced by the ECU to try and maintain idle target that I am not yet tuned in to - later on have that purring at 1000rpm)

 

[boss351]

One of the dyno pulls during tuning:

 

[boss351]

Next up is a little fab/repair work to the throttle cable bracket (re-used the cable from my original setup), the bracket could do with some more meat on its mounting point for the cable.

 

Also cleaning up the engine bay to leave space for a very likely Accusump addition. On a separate thread have made a post about eliminating some of the coolent hoses (together with the already gone heater).

 

The car drives great and pulls harder from about 5000 rpm up. It is in good shape for future upgrades but for the moment I'll enjoy this one how it is.