Pure Motorsport: JDL Turbo BRZ Track Build

[ATL BRZ]

Seems easier just to keep the tank topped off.

[King Tut]

Originally Posted by ATL BRZ

Seems easier just to keep the tank topped off.

That won't work if you get to the point @Jonsey has reached. I agree that as long as you are able to get a couple sessions in before fuel starving and you aren't in a competition like time attack or racing with a minimum weight, then it is far easier to keep the tank topped off.

[gramicci101]

Originally Posted by ATL BRZ

Seems easier just to keep the tank topped off.

How much fuel do you use in a 20 minute session? Would you be able to top it up between sessions and have no issues, or is this something where you start with a full tank and are having starvation issues by the end of the same session?

Originally Posted by King Tut

Never seen that. Generally it is mounted inside the car or near the fuel tank under the car. For the BRZ, I would ditch the rear cushion and build a nice mount for it in the driver/rear seat area.

Is there any reason it would need to be physically close to the OEM tank? There's already a fuel line running from the OEM pump to the engine; it just seems easiest to access that line in the engine bay when it's no longer covered or tucked under stuff. I'm just speculating in the absence of data, mind.

[ATL BRZ]

Originally Posted by gramicci101

How much fuel do you use in a 20 minute session? Would you be able to top it up between sessions and have no issues, or is this something where you start with a full tank and are having starvation issues by the end of the same session?

I typically use about 1/4 tank per session, so I don't have issues for a full session after topping off.

Never starved at Road Atlanta or Barber even dipping below 1/2 tank. AMS and AMP are where it has happened so far and only recently.

[gramicci101]

Originally Posted by ATL BRZ

AMS and AMP are where it has happened so far and only recently.

And even then only when it's below 1/2 tank?

Yeah, seems like it would be easier and cheaper just to top it off between sessions. It's just not as #racecar.

[ATL BRZ]

Originally Posted by gramicci101

And even then only when it's below 1/2 tank?

Yeah, seems like it would be easier and cheaper just to top it off between sessions. It's just not as #racecar.

Starved at AMS below 1/2 tank only on the banking and at AMP below 3/4 tank on the carousel in T14-15.

[gramicci101]

Originally Posted by ATL BRZ

Starved at AMS below 1/2 tank only on the banking and at AMP below 3/4 tank on the carousel in T14-15.

@Element Tuning saw similar activity on hard left turns followed by long right sweepers. Note the racing slicks that would allow for even more lateral g's.

http://www.ft86club.com/forums/showthread.php?t=2742

Originally Posted by Element Tuning

Saddle tanks are a problem in the newer STis because there is only one fuel pump and then a siphon system on the other side. Now even without the saddle tanks the older STis have fuel starvation issues below half tank (if you're fast on the track).

The FRS has been really good for me while racing but I did pick up some fuel starvation around half a tank in a hard left turn followed by a long right sweeper (on racing slicks). We fix the STis by using two fuel pumps but I need to look more into the FRS system to see if it's similar to the STi where the surge tank on the passenger side is feed by the siphon on the driver's side.

It seems like the pump is on the driver's side, so a hard left turn will slosh all your fuel to the passenger side of the saddle and away from the pump. You'd think the left turn banking at AMS would help keep fuel on the driver's side (downward side), but I guess the g-forces are enough to overcome that. Maybe Element has come up with a way to install an additional pump on the passenger's side to correct that issue.

[King Tut]

Another option that the S2000 guys are excited about is the Holley HydraMat. Supposedly they are going to be releasing a version the size of a normal pump filter that you can just snap on the end of your fuel pump to help with starvation.

[ATL BRZ]

Farewell to my RE-11As. They put up with over a year of track abuse before heat cycling out and wearing down past the wear bars.





Street mode engaged




Looking forward to some much stickier rubber in the future!

[Chazzzy]

Originally Posted by ATL BRZ

Street mode engaged

[Cop]

Awesome build, loving what you're doing with the car

[ATL BRZ]

Originally Posted by Cop

Awesome build, loving what you're doing with the car

[Lawn_Mower]

Originally Posted by ATL BRZ

I've been reading that they wear VERY quickly but I don't understand how they get a 200 treadwear rating?!?

I'm sure you're aware, but tread wear ratings are practically completely arbitrary, and not as cut and dry as you'd expect them to be. A manufacturer can basically put whatever wear rating they want (exaggerating a little) on a tire to position it for a certain market .

http://www.tirerack.com/tires/tirete....jsp?techid=48

[ATL BRZ]

Put down 205whp on DBW Motorsports' Mustang Dyno today.



Very pleased with the torque curve!