


After AFD was over, I had a bit of motivation to get a few things finished off on the Fairmont... Started with the intake manifold swap.
Started off with this spare BBM, pulled it apart, got it soda blasted and then went to work with it.

Finished off porting the intake manifold, gave it a quick coat of flat black engine enamel and spent a good Saturday arvo swapping it over.






With the coated fuel rail

Lined it up against my ported 91AA head + gloss black AU rocker cover, looked quite mad


Pulled the polished upper off my old BBM and gave it a quick clean (already smoothed the runner out when I polished it a few years back) and then gasket matched the ports between the upper and lower halves. The gasket between head and lower was trimmed slightly to make sure no parts of it protruded past the port, for some reason nearly every head-to-manifold gasket I have come across has been slightly smaller than the ports on the manifold

Upon pulling the lower intake manifold out of the engine bay, I saw a pretty awful amount of oil pooled up inside the lower manifold. Decided to put the catch can back in straight away, this time deleting the factory PCV breather setup and blocking off the open ports on the throttlebody and intake manifold. Mounted the catch can, gutted the PCV valve and hooked it directly up to to catch can, along with the rear breather hose so now no oil vapour is recirculating back through the intake.
Manifold off. Was planning to relocate the coilpack at this point, but just couldn't find a decent place for it that wouldn't make it stand out too much


Once the ported manifold was in, I got to work swapping over the Cermakrome coated fuel rail. Pulled the AU injectors apart, hooked them up to a DIY pulsing circuit and flushed some throttlebody cleaner through each of them. Grabbed a multimeter and did a quick resistance check on them first before fitting the new the o-rings, filters and pintle caps. Put it all back together and that was that!
Injectors on the operating table, lol.

Old parts vs new parts..

All freshened up..


All back together..


Seems to run much smoother now, and appears to have fixed a small vacuum leak that I may have had previously. Now idles steadily at 650-700rpm whereas before I couldn't get it to idle lower than 850rpm in drive and that was with the throttle stop screw wound completely off, lol. Ended up having to re-tune the AFR's around idle as they were a little on the rich side.
Now that I don't have oil vapour recirculating back through the intake and into the combustion chamber, I added a little more timing and had some good success. Added another 1-1.5 degrees in the midrange around 3/4 - WOT, added another 2 or so degrees around cruise loads and decel. As a result, it feels a bit more effortless in normal driving conditions and sharper on the throttle which is good. Previously I had timing dropping back a degree around the BBM switchover around 3/4 - WOT loads, but now have leveled that area of the map so that it doesn't dip. BBM switchover point feels a bit more pronounced now, not sure if the manifold porting has had a helping hand with it (probably not, lol) but overall it feels pretty good so I'm happy.
Currently planning to swap back to the AU rocker cover and be done with it. At the moment the cover is with Pro Coat getting sandblasted clean, then I've got a couple of AN bung's to be welded on so I can run some nice fittings and braided hose to the catch can. The old factory coolant overflow hoses I'm running to the catch can right now look a bit boring

Drag season is starting back up next month so I should be getting the Fairmont back down the 1/4 for a bit of fun. Hopefully I can crack a fucking low 15 this time round. If not, I think I better stop kidding myself and turbo it already haha.