Project Update for July 16, 2012:
Well the Subaru has been here for a hair over a week and we've accomplished a good bit. Let's take a look and see what has happened. If you have never read one of my build thread posts before... I add a lot of pictures. We try to share race preparation tips whenever we can, so people can see what it takes to do what we're talking about. Since we tend to "over-share", we can see lots of second-guessing and internet criticism, which is fine. Just know that we have nearly a dozen experienced race techs working and/or "supervising" on this build - so rest assured that each modification shown has had a lot of criticism before the first cut was made.
The first day it was here it was put in the air for a look inside, out and underneath. It was grimy, dirty and covered in muck after many years of hard race use, including blasting up Pikes Peak last year. Our guys wheeled it outside and put it up on jack stands. After a couple of hours with the pressure washer, suited up in rain gear + face shield, the underside and wheel well grime was mostly gone. The engine bay was washed with a bit more care and less pressure. Now it could be worked out on without too much nastiness getting on us. The Subaru is going to be wrapped from the shoulder line down, so all of the decals in those areas were removed and the panels cleaned.
After a look by the plumbing experts at Pirtek Plano South, they made a list of items and systems to tear down further for a closer look (fuel tank, rear subframe, cooling system, etc). It quickly became apparent that they wanted to do a major plumbing upgrade on every system of the car, front to back. That seems a bit overboard, and it is a huge undertaking, but the Pirtek guys are friends of ours and Jason's and they wanted to show off some of their race car worthy hardware. Vorshlag uses Pirtek for all of our plumbing needs. This car was purchased and then prepped a whole two weeks before the 2011 Pike's Peak event
, so some of the race preparation work done in that short timeframe, or by previous owners, was probably rushed. We've got about three weeks to go back and do some updates and us and the Pirtek guys will need every bit of that time to get this updated. Hill climbs are brutal on every system on a car, so going in with all new race parts should add reliability.
After that first look few days later Pirtek came back with a three man team (Ed, Mike and John) and with JasonM's help they pulled the stock tank (full of E95!), then removed a tangled mess of OEM rubber and hard lines, as shown in the big box above. The long jumble of fuel hard lines from the tank to the engine bay are also gone for good. This box includes dozens of patches, fixes, and updates over the many years this car has been a race car. Not atypical when a race car has passed through several owners.
The rear subframe was removed, along with the differential assembly, to make room to extract the fuel tank. Once the fuel tank was out the factory fuel pump + pick-up assembly was removed and upgraded. Deleted the in-tank filter, TIG-welded -6 AN bungs in place of the stock push-lock ends, and securely mounted an in-tank Walbro 255 lph pump to the pick-up. The Pirtek guys new submersible fuel line to connect it all, as the outer jacket is of course covered in fuel (alcohol). These new feed and return line connections on the exterior of the fuel tank will with be connected to the rest of the fuel system with braided -6 lines using proper AN fittings everywhere.
It was noted that the subframe to chassis mounts were still OEM rubber, so a call was made to TurnInConcepts
, who are sending a gaggle of their custom race bushings to install. Thanks!
Once those arrive, we'll pop them in and reinstall the rear subframe; the fuel tank is already back in place.
With the OEM fuel hard + soft lines and fuel rails out of the way, a new set of billet fuel rails were purchased and installed. A new Kinsler fuel pressure regulator is now mounted on the left front strut tower, which will regulate fuel supply to the new rails. A fuel pump surge tank made by Integrated Engineering and supplied by AWD Tuning (which uses a Bosch 044 pump mounted in the top), will be fed from the stock fuel tank by the 255 lph Walbro in-tank pump (see above), acting as a lift pump. A 100 micron pre-filter will be used before the surge tank/pump and a 10 micron filter will be in-line after the final fuel pump stage. I will show this area in more detail once these filters and the surge tank are permanently mounted and plumbed.
(because of the 10 image limit, I have to break this post up into 3 parts)