MRG MotorSports 818S Build

[Bob_n_Cincy]

Spent both days this weekend autocrossing in my original donor.
10344775_10152075941091301_2169724212254931832_n.jpg
My Impreza looks huge compared to the two Miatas. I need to get done with the 818s.
Bob

[svanlare]

I've just caught up reading your whole build thread and I'm definitely going to do my best to end up a with a similar setup for the wiring. VERY nice job.

[Bob_n_Cincy]

This is one of my other Projects
http://ultimatemotorcycling.com/ligh...cle-gathering/

2014-lightning-ls-218-to-debut-quail-motorcycling-gathering-1.jpg
Bob

[Bob_n_Cincy]

organized my axles to figure out what I had to work with.
All eight of my outer cv joints are installed in the cars.
Starting left to right.
Two 06 impreza rear axles with inner joints (not needed)
Two 04 forester rear axles with inner joints (not needed)
Four FFR axles (needed)
Two 04 forester front axles (not needed)
Two 04 forester front tripod inner CV joints (needed)
I believe these are aftermarket at they are not Subaru green.
The spline on the tripod does fit the FFR axles.
Two 06 impreza front tripod inner CV joints (needed)
Two 06 impreza front axles (not needed)
Now to start reassembling with the FFR axles.
Bob

[Bob_n_Cincy]

Mounted the rear suspension today. I used all adjustable arms (5 per wheel). Does anybody have the center to center distance for each of the links?
Thanks
Bob

[Erik W. Treves]

I don't know about a belly pan, but don't forget to install a parking brake

[Frank818]

Besides the repair costs and the people who forgot to tie the car on platform (ebrake is one thing but it needs more), there looks to be a hump on the belly pan between the 2 front wheels. What's its use?

[MrDude_1]

Besides the repair costs and the people who forgot to tie the car on platform (ebrake is one thing but it needs more), there looks to be a hump on the belly pan between the 2 front wheels. What's its use?

skid plate. its lower there because the car needs the clearance. When jumping the rally car at speed, it does slam the ground.

[Frank818]

Oh yeah that's true, I forgot about that. Useless on my 818.

[MrDude_1]

Oh yeah that's true, I forgot about that. Useless on my 818.

If you do decide to jump the 818, Please take video.

[Bob_n_Cincy]

As I am designing a front mounted fuel tank. I am considering using the OEM fuel pump assembly.
I have two donor pumps.
The one on the left is out of a 06 NA 2.5 impreza.
The one on the right is out of a 04 forester XT 2.5 turbo.



Here is a comparison:
Length is same, perfect for 11" deep tank.
Fuel filter sock. Bigger on turbo
Fuel pump: same physical size
Fuel Temperature sensor: same
Fuel level sensor: slightly different
Fuel filter: NA in tank Turbo on firewall
Fuel Pressure regulator: NA in tank Turbo on engine
Fuel Return Line: NA none Turbo yes
Pressure damper: NA near engine Turbo in tank
Electrical connector: same

I'm going to use the turbo version in my tank with an new Aeromotive 340 Stealth pump.

[icky]

Weird, my 05 fxt had one that looks like the one on the left. Installed a walbro 460L incorrectly, needs higher guage wire, I'll snap a pic when I fix it.

[Bob_n_Cincy]

Weird, my 05 fxt had one that looks like the one on the left. Installed a walbro 460L incorrectly, needs higher guage wire, I'll snap a pic when I fix it.

Interesting: looks like Subaru bounced around on fuel supply configurations.
Edit: I would like to see a picture of an 05-07 turbo pump, filter combo.

Bob

[Westview]

Edit: I would like to see a picture of an 05-07 turbo pump, filter combo.

Bob

Here's the one that came with my Donor pallet from Wayne (Should be out of a 2006 WRX Wagon):
DSC_0366.JPG

[Bob_n_Cincy]

Here's the one that came with my Donor pallet from Wayne (Should be out of a 2006 WRX Wagon):
DSC_0366.JPG

Thanks Westview,
That looks like the filter sock out of my 04 FXT. Do you know it the 06 wrx filter was in the tank or on the firewall?
Bob

[Westview]

Thanks Westview,
That looks like the filter sock out of my 04 FXT. Do you know it the 06 wrx filter was in the tank or on the firewall?
Bob

I can't say for sure, but I think they switched to the in-tank filter by 06.

[RM1SepEx]

My 05 had the in tank filter, I bought an 02 filter from NAPA and mounted it to the frame...

[Bob_n_Cincy]

A friend of mine spotted an 818 on "US421 The Snake" last weekend. Any one know who it was?
The Snake . . . " 33 miles 489 curves 3 mountains 1 valley . . . from Mountain City, TN to Bristol, TN

[wleehendrick]

A friend of mine spotted an 818 on "US421 The Snake" last weekend. Any one know who it was?
The Snake . . . " 33 miles 489 curves 3 mountains 1 valley . . . from Mountain City, TN to Bristol, TN

Probably the guy who bought Erik's!

[Bob_n_Cincy]

Had some time this weekend to work on the blue ICE car .
Installed front firewall and tighten up most of the front suspension.
P1050073s.jpg

Also installed the pedal box.
Added a 2 x2 x 1/8" 16" long to mount the gas pedal. See pictures
P1050069s.jpgP1050071s.jpg
Bob

[thall818]

Hey Bob, I just mocked up my suspension just like yours and was told my upper a-arm bushings were upside down. That the grease fittings point up instead of down. I think there are conflicting photos in the manual. I'm not sure, just passing on what I was told.

Also, my ball joints sit in flat sockets, yours are tilted. Any idea why the differences?

Travis

[Bob_n_Cincy]

Hey Bob, I just mocked up my suspension just like yours and was told my upper a-arm bushings were upside down. That the grease fittings point up instead of down. I think there are conflicting photos in the manual. I'm not sure, just passing on what I was told.

Also, my ball joints sit in flat sockets, yours are tilted. Any idea why the differences?

Travis

Hi Travis
Thanks for your comments.
The grease fitting work either way. I think it is personal preference on the easiest way to get to them once the fenders are on.
The earlier kits came with the angled "A" arms. I would rather have the straight ones.
Bob

[Bob_n_Cincy]

I am using some Teflon Braided Stainless Steel fuel line.
http://www.summitracing.com/parts/sum-220985

I have found some quick connect fitting to connect it to the engines fuel feed line.
http://www.summitracing.com/parts/rus-644113
http://www.summitracing.com/parts/sum-220141

My problem is the return line. The engine has a 5/16 tube with a bulge in it. What is the proper way to adapt my hose to the Subaru tube?
Thanks
Bob

[Bob_n_Cincy]

Getting ready for the Front gas Tank Installation. Removed bottom bars to be replaced by bolt in bars and steel intrusion plate.
All brake and clutch lines run inside the cockpit.

P1050082s1.jpg

Covered Fire wall with some Dynamat.

P1050089s2.jpg

Filled gas tank with some safety foam.

P1050083s3.jpg

Lengthen Subaru fuel pump bracket and wires.

P1050087s4.jpg

Used tubular sending unit.

P1050088s5.jpg

Mounted tank in Car.

P1050095s6.jpg


cad.jpg


14 gallons total, Maybe 13 usable.
Fuel lines tomorrow.
Bob

[Frank818]

Very very nice.

Is that foam made just for that tank or it can go in the FFR tank? Actually, I think I don't understand its safety feature, if you haven't yet, maybe you can explain?

[Bob_n_Cincy]

Very very nice.

Is that foam made just for that tank or it can go in the FFR tank? Actually, I think I don't understand its safety feature, if you haven't yet, maybe you can explain?

See link:
http://www.summitracing.com/parts/rci-7050a/overview/


"safety foam reduces fuel slosh and helps to suppress explosions."

Cannot use with gas level sending unit that have a float on the end of an arm.
Bob

[Bob_n_Cincy]

Has anybody else considered a rear mounted radiator?
Bob

[RM1SepEx]

yes, but I don't think airflow is enough with current configuration. I think you could do a rear mounted IC...

to do it you would need to do some big time airflow work

[Bob_n_Cincy]

yes, but I don't think airflow is enough with current configuration. I think you could do a rear mounted IC..
to do it you would need to do some big time airflow work

I need to talk to one on my aerodynamic engineer friends. I would think rear vacuum should be as strong as front ram air.

I do plan on opening up the side vents to ram the air into the engine bay. All that air will have to go out through the rear radiator.

With side vent ram air and rear vacuum, it might be better than the radiator in front.
Bob

[Frank818]

Do we know any production car using such a design?

[Boog]

80's 911?

[Bob_n_Cincy]

I temporarily mounted my rear radiator. It will move forward 6" after I shorten my transmission.




Oh yea, the fans work running backwards.
Bob

[Boog]

Very slick.

[Bob_n_Cincy]

I also moved my expansion tank on top of the frame rail. I'm thinking the higher the better.
Bob

[Boog]

Are you still planning on going with a front fuel tank? Any thoughts as to the design?

[RM1SepEx]

Are you going to open up the side vents fully vs. using the smallish cuts supported by the FFR vent screens and trim? Moving the IC too?

[metalmaker12]

I like the idea, but this seems like it will get hot air vented to it without direct ducting (the turbo and exhaust should be fully insulated). I would think the heat soak potential would be very great. I am interested it what else you add to this setup to make it effective. Definitely outside the box thinking, and hopefully it can yield a postive result.

[Bob_n_Cincy]

Are you still planning on going with a front fuel tank? Any thoughts as to the design?

Not planning any more, Check out post 145 above.

[Bob_n_Cincy]

Are you going to open up the side vents fully vs. using the smallish cuts supported by the FFR vent screens and trim? Moving the IC too?

I will be opening up the side vents fully and then some. Maybe something like this:
2010_audi_r8_picture%20(44).jpg

Also going to a AWIC. I have not decided on location of heat exchanger.
Bob

[Bob_n_Cincy]

I like the idea, but this seems like it will get hot air vented to it without direct ducting (the turbo and exhaust should be fully insulated). I would think the heat soak potential would be very great. I am interested it what else you add to this setup to make it effective. Definitely outside the box thinking, and hopefully it can yield a postive result.

Hey Metalmaker,
I do plan on fully insulating the exhaust the best I can.

I think you are talking about heat soaking the main radiator. I plan on bringing as much air as possible into the engine compartment. Enlarged side vents and possibly opening up the side pods right behind the front wheels.

Metal, you are the main reason I went this direction. An engine under high load forms little bubbles, like the bottom of a pot about to boil. These bubbles all collect together some where and form an air lock in the cooling system. I think this is what happened to your engine. Possible in the top of your heads or in the front radiator. Were your blown head gaskets at the top of the engine?

As far as heat soaking the IC. I will be going to AWIC.
Thinking outside the box has been my career. I have fallen on my face many times. Note to self: Learn from my mistakes.

Bob