Out with the old...in with the new...Britain's Racecar Development, Subaru Engine, Lotus Suspension! Time to go racing! Options

[championgt1]

335 whp! (IMG:style_emoticons/default/w00t.gif) Not sure if you mentioned it before. How much does the car weigh?

[Britain Smith]

1825lbs (IMG:style_emoticons/default/smile.gif)

[EdwardBlume]

TTOD 2013 Porsche Parade?

Nice job Brit!

[Chris Pincetich]

Nice job on the prodigious use of yellow paint (IMG:style_emoticons/default/beerchug.gif)
When do we see the 25 psi boost dyno run? (IMG:style_emoticons/default/biggrin.gif)

[Britain Smith]

TTOD 2013 Porsche Parade?

Nice job Brit!

I wish...in the eyes of PCA this is not a real Porsche...on so many levels.

-Britain

[Britain Smith]

Ok, here is the video from the dyno runs yesterday.

http://youtu.be/dj-BXAbsVoE

[championgt1]

1825lbs (IMG:style_emoticons/default/smile.gif)

Damn!! (IMG:style_emoticons/default/beerchug.gif)

[BKLA]

Holy (IMG:style_emoticons/default/post-2-1117899824.gif) !!!

Need to come and see before it goes to Cali....

[Britain Smith]

Sorry for the delay in updates. I have been really busy working on the car and completing a bunch of aero upgrades. We ran this car this past weekend and were very happy with the results.

First off, we got a new piece of Alumlite for the front splitter. The last one got banged up pretty good.

(IMG:http://www.914world.com/bbs2/uploads_offsite/sphotos-b.xx.fbcdn.net-364-1363803349.1.jpg)

Looking underneath, the splitter goes back as far as allowed.

(IMG:http://www.914world.com/bbs2/uploads_offsite/sphotos-b.xx.fbcdn.net-364-1363803349.2.jpg)

The front of the splitter was wrapped in a layer of fiberglass and carbon fiber to protect the leading edge. This thing took multiple cone hits this past weekend without even a scratch.

(IMG:http://www.914world.com/bbs2/uploads_offsite/sphotos-b.xx.fbcdn.net-364-1363803349.3.jpg)

Also modified the front valance that to match the front fender profile.

(IMG:http://www.914world.com/bbs2/uploads_offsite/sphotos-b.xx.fbcdn.net-364-1363803350.4.jpg)

[Britain Smith]

The next step down the path of aero upgrades was the rear.

Here is the rear trunk lid with the lexan spoiler removed.

(IMG:http://www.914world.com/bbs2/uploads_offsite/sphotos-a.xx.fbcdn.net-364-1363804960.1.jpg)

The replacement is a new dual element rear wing from Dauntless Racing. The height and location is dictated by the rules for an open cockpit car. Here is the wing with the custom uprights mocked up.

(IMG:http://www.914world.com/bbs2/uploads_offsite/sphotos-b.xx.fbcdn.net-364-1363804960.2.jpg)

Here is the wing's final mounting location and a new rear bumper in place to complete the look.

(IMG:http://www.914world.com/bbs2/uploads_offsite/sphotos-e.ak.fbcdn.net-364-1363804961.4.jpg)

To support the decklid, I made uprights in the rear trunk to provide support under the wing.

(IMG:http://www.914world.com/bbs2/uploads_offsite/sphotos-b.xx.fbcdn.net-364-1363804961.5.jpg)

Aerocatches added to rear decklid for ease of use and adjustability. Makes removal so much easier.

(IMG:http://www.914world.com/bbs2/uploads_offsite/sphotos-b.xx.fbcdn.net-364-1363804961.6.jpg)

Loaded up and rear for battle.

(IMG:http://www.914world.com/bbs2/uploads_offsite/sphotos-a.ak.fbcdn.net-364-1363804962.7.jpg)

[Britain Smith]

We took the car down to sunny California this past weekend and run with the Golden Gate Region PCA on Sat. to do some aero testing and set-up changes. Overall very happy with the new Dauntless as small adjustments in the wing flap yielded noticeable changes in grip.

Here is the car at the event.





Here is a video of my fastest run.

http://www.youtube.com/watch?v=ScXdmeyrU_E

[Britain Smith]

On Sunday we ran with the American Autocross Society down at Marina, CA. We were only able to get a couple of runs in before the transmission called it quits.



Here is a video of my first run which was still good enough for a top10 finish, but well off the pace of TTOD.

http://www.youtube.com/watch?v=SAKjxuRbeDg

At the end of my co-drivers second run, he appears to have downshifted abruptly without blip throttle to match the RPM's. You can hear on the video of my co-owner's run in which it occurs, the tire scratch a bit, and loud grumbling comes from the trans. We broke several teeth off the 2nd gear on the mainshaft. The car was shut down quickly so no other damage appears to have occurred. The parts could have had previous damage from launching, but in the end it doesn't matter who or how it broke...it will be fixed and we will move on.

Here is his video:

http://www.youtube.com/watch?v=OBSnQT3Kcw4

It will be easy to fix as parts are stock...but time to look for a stronger solution.

(IMG:http://www.914world.com/bbs2/uploads_offsite/sphotos-a.xx.fbcdn.net-364-1363805984.1.jpg)

[BMiller]

Those Cali run videos are awesome! Nice work!

Sorry to hear about the trans, but looking forward to more videos after the fix.

[Rod]

Was having a look at a website that my friend has his BMW build on and what did I come across????

http://www.build-threads.com/build-threads...-914/#more-7050

Nice..

[Runman07]

Sweet build man! Spent the last few hours reading this. As a fan of the boxer motor (and subaru's in general (I own a WRX)) you are doing everything right! Light weight plus twin scroll ej207 power is definitely a recipie for disaster (in a good way).

to really do it right you should look into getting a Subaru transmission to mate up to that. And for that task I would suggest getting either a JDM Spec or a USDM Spec 6 speed. Why a 6 speed you might ask? Because the transmission is built better and the wrx 5 speeds are notorious to blow up. (Albeit its stronger than the 901). Just my .02.

Looking forward to seeing moar updates!!!

-Brant

[Britain Smith]

Thanks Brant.

I actually have been working hard on something even better than the Subaru trans. Details will come soon.

-Britain

[Britain Smith]

Little update on what I have been working on for the last 6weeks or so. After blowing up four 901 transmissions in two weeks, I decided to sell off the good parts and focus on fixing the problem instead. The solution to that problem is a 930 transmission and with everything I do, leaving it stock is not good enough.

Here is the 901 transmission in all it's glory. All pulled apart for the last time. I shed a quick tear...

BTW, final weight with fluid was 78lbs.
(IMG:http://www.914world.com/bbs2/uploads_offsite/fbcdn-sphotos-c-a.akamaihd.net-364-1373557913.1.jpg)

First fitting of the 930 box. Took a little bit of modifications to the top of the case and around one of the adapter bolts, bit is in place. Damn thing is big.
(IMG:http://www.914world.com/bbs2/uploads_offsite/fbcdn-sphotos-c-a.akamaihd.net-364-1373557915.2.jpg)

I had to cut off a bit of excess metal around the shock mounts to clear the side plate cover studs.
(IMG:http://www.914world.com/bbs2/uploads_offsite/sphotos-a.xx.fbcdn.net-364-1373557915.3.jpg)

Going to need to cut the rear trunk out a bit to clear the intermediate housing. Thinking about a support bar between the cage mounts in the shape of the blue paper towels.
(IMG:http://www.914world.com/bbs2/uploads_offsite/sphotos-b.xx.fbcdn.net-364-1373557916.4.jpg)

Rear trunk floor removed...makes working on the transmission easy.
(IMG:http://www.914world.com/bbs2/uploads_offsite/fbcdn-sphotos-f-a.akamaihd.net-364-1373557967.1.jpg)

[Britain Smith]

Now it is time to start working on the trans mount and adding a bar between the cage mounts.
(IMG:http://www.914world.com/bbs2/uploads_offsite/sphotos-a.xx.fbcdn.net-364-1373558140.1.jpg)

Adding strength back after removing the rear trunk. You will notice that I left the bottom part of the trunk floor in place to keep the sub-frame in position while adding additional supports.
(IMG:http://www.914world.com/bbs2/uploads_offsite/sphotos-b.xx.fbcdn.net-364-1373558141.2.jpg)

More of the trunk floor cut away. I am doing this in sections to keep the position of the subframe from shifting.
(IMG:http://www.914world.com/bbs2/uploads_offsite/fbcdn-sphotos-d-a.akamaihd.net-364-1373558142.3.jpg)

Scab plates in place to cover the hole in the chassis. Tubing added to tie the subframe connections in place.
(IMG:http://www.914world.com/bbs2/uploads_offsite/fbcdn-sphotos-c-a.akamaihd.net-364-1373558142.4.jpg)

Trunk/Chassis modifications completed. Truck cut out and structural bars put in it's place.
(IMG:http://www.914world.com/bbs2/uploads_offsite/sphotos-a.xx.fbcdn.net-364-1373558143.5.jpg)

Back view of the rear structure. Lots of room back here to work on the trans from above.
(IMG:http://www.914world.com/bbs2/uploads_offsite/fbcdn-sphotos-a-a.akamaihd.net-364-1373558143.6.jpg)

Transmission case back in place.
(IMG:http://www.914world.com/bbs2/uploads_offsite/fbcdn-sphotos-f-a.akamaihd.net-364-1373558144.7.jpg)

[Britain Smith]

Ready to start bending tube for the transmission support.
(IMG:http://www.914world.com/bbs2/uploads_offsite/fbcdn-sphotos-f-a.akamaihd.net-364-1373558225.1.jpg)

1" DOM tubing bent for the transmission mount. Need to finish up the sub-frame mounts next.
(IMG:http://www.914world.com/bbs2/uploads_offsite/fbcdn-sphotos-d-a.akamaihd.net-364-1373558226.2.jpg)

Side view of trans mount.
(IMG:http://www.914world.com/bbs2/uploads_offsite/sphotos-a.xx.fbcdn.net-364-1373558228.3.jpg)

Trans mount done.
(IMG:http://www.914world.com/bbs2/uploads_offsite/sphotos-a.xx.fbcdn.net-364-1373558228.4.jpg)

[Britain Smith]

Another part of this adventure was dealing with the differences in bell housings depths between the 901 and the 930 transmission.
(IMG:http://www.914world.com/bbs2/uploads_offsite/fbcdn-sphotos-d-a.akamaihd.net-364-1373558353.1.jpg)

The deeper bell housing flange on the 930 trans puts the starter ring gear in a different location in relation to the flywheel. In addition, the 930 starter ring gear is 2mm larger diameter.
(IMG:http://www.914world.com/bbs2/uploads_offsite/fbcdn-sphotos-b-a.akamaihd.net-364-1373558354.2.jpg)

To adapt my 901/915 style flywheel to work in the 930, we had an adapter plate CNC machined. This will allow me to use my current flywheel/clutch set-up and a 930 starter ring gear.
(IMG:http://www.914world.com/bbs2/uploads_offsite/fbcdn-sphotos-h-a.akamaihd.net-364-1373558355.3.jpg)

Front side view of the starter ring gear adapter.
(IMG:http://www.914world.com/bbs2/uploads_offsite/fbcdn-sphotos-g-a.akamaihd.net-364-1373558355.4.jpg)

My current flywheel with 915 starter ring gear removed.
(IMG:http://www.914world.com/bbs2/uploads_offsite/sphotos-a.xx.fbcdn.net-364-1373558356.5.jpg)

Adapter in place.
(IMG:http://www.914world.com/bbs2/uploads_offsite/fbcdn-sphotos-f-a.akamaihd.net-364-1373558356.6.jpg)

930 starter ring gear bolted on. This put the starter ring gear in the correct location in the bell housing.
(IMG:http://www.914world.com/bbs2/uploads_offsite/fbcdn-sphotos-d-a.akamaihd.net-364-1373558358.7.jpg)

930 splined clutch plates to replace the 901 splined plates that I had.
(IMG:http://www.914world.com/bbs2/uploads_offsite/fbcdn-sphotos-b-a.akamaihd.net-364-1373558358.8.jpg)