Out with the old...in with the new...Britain's Racecar Development, Subaru Engine, Lotus Suspension! Time to go racing! |
|
Porsche, and the Porsche crest are registered trademarks of Dr. Ing. h.c. F. Porsche AG.
This site is not affiliated with Porsche in any way. Its only purpose is to provide an online forum for car enthusiasts. All other trademarks are property of their respective owners. |
|
Out with the old...in with the new...Britain's Racecar Development, Subaru Engine, Lotus Suspension! Time to go racing! |
Britain Smith |
Dec 6 2010, 11:33 AM
Post
#1
|
Nano Member Group: Members Posts: 2,354 Joined: 27-February 03 From: Hillsboro, OR Member No.: 364 |
For those who don't know me or the car, I have a '74 914 that is a dedicated AX car. It previously had a high compression 2.7 6-cylinder motor and made 205hp/205ft-lbs at the wheels. This set-up wasn't all that bad considering that it won the 2008 and 2009 914 Shootout events, however the quest for more speed continues.
Here is the car in the 2010 season trim. (IMG:http://www.914world.com/bbs2/uploads_offsite/dragracevws.com-364-1291656786.1.jpg) I have recently sold the 2.7L 6-cylinder engine and all the remaining 914/6 conversion parts. I have used the proceeds to fund the conversion to Subaru power. Now most would say that a Subaru conversion can be done on a budget, however I have found that the money goes flying out the window when doing something like this. Regarding the engine...logical choice would be to go for a EJ257 2.5L USDM STi engine. However, all the SCCA rules for AX are built around displacement which in turn dictates the minimum weight. Therefore, I have gone with a JDM STi version8 Spec-C engine which is a 2.0L, twin-scroll, hand ported/polished, 8500rpm animal. I will get slightly less hp and torque numbers than the 2.5L, but save 150lbs of weight. |
Britain Smith |
Dec 6 2010, 11:36 AM
Post
#2
|
Nano Member Group: Members Posts: 2,354 Joined: 27-February 03 From: Hillsboro, OR Member No.: 364 |
With the engine mounted, it was time to address some necessary items on the chassis. First off was the radiator. Here is my first mock-up of the radiator location. This one is 16x22, however I went with a 14x22 to add some additional clearance. It will mounted it at about a 30deg angle in the front trunk and vent it out the hood. It will also have a Spal fan mounted to help with cooling while sitting in the pits between runs.
My tiny 5 gallon fuel tank is just not going to fit properly and I will probably have to make a new one that is narrower and wider. (IMG:http://www.914world.com/bbs2/uploads_offsite/sphotos.ak.fbcdn.net-364-1291657017.1.jpg) The radiator lines are Gates Yellow-Strip hose snaked throughout the body. In the front, I opened up some of the body panels and run the lines thru. (IMG:http://www.914world.com/bbs2/uploads_offsite/sphotos.ak.fbcdn.net-364-1291657017.2.jpg) In the cabin, the lines jog over to the frame rails and down what used to be the heater ducting tubes. (IMG:http://www.914world.com/bbs2/uploads_offsite/sphotos.ak.fbcdn.net-364-1291657017.3.jpg) In the engine bay, they come out of the heater duct tubes and will connect to the engine. (IMG:http://www.914world.com/bbs2/uploads_offsite/sphotos.ak.fbcdn.net-364-1291657017.4.jpg) One issue with the engine mount bar that I fabricated was the clearance for the thermostat housing cover. (IMG:http://www.914world.com/bbs2/uploads_offsite/sphotos.ak.fbcdn.net-364-1291657018.5.jpg) After a little sleuthing around ebay, I decided to take a chance on a Subaru 3.0L engine thermostat housing which was for sale for pretty cheap. Here you can see the differences. (IMG:http://www.914world.com/bbs2/uploads_offsite/sphotos.ak.fbcdn.net-364-1291657018.6.jpg) Low and behold, it fits and gives me just enough clearance... (IMG:http://www.914world.com/bbs2/uploads_offsite/sphotos.ak.fbcdn.net-364-1291657018.7.jpg) |
Lo-Fi Version | Time is now: 22nd November 2024 - 06:42 AM |
All rights reserved 914World.com © since 2002 |
914World.com is the fastest growing online 914 community! We have it all, classifieds, events, forums, vendors, parts, autocross, racing, technical articles, events calendar, newsletter, restoration, gallery, archives, history and more for your Porsche 914 ... |