[Dr K]

Extremely nicely done, Jazz.

[Mackpipes]

Originally Posted by Vicegrip

I don't tend to stop in on the BMW threads but glad I did today. Good to see it came out well and proves that proper prior planning prevents piss poor performance.

Ah yes, the seven P's!

[Jazzbass]

Originally Posted by HughA44s

Also, seeing the gas tank out of the car makes it obvious why these cars (non-Ms) have fuel starvation issues in hard right hand turns (especially with sticky tires).

How so? I would have assumed the M tank had the same as the rest of the E46s, so if this was an issue the Ms would have it too.

[roundel]

BMW handles the problem with a pump that sends the gas to the side with the main gas pump. At least in E36s, the pump was good until the OBDII cars when the "upgraded" to a crappier design. The fix was to install a 95 pump. I am not aware of the tanks being a ///M specific part.

[HughA44s]

The e46 M3 have a second pick-up going directly to the pump (as I understand it). It can be retro fitted to non-Ms but you lose the fuel gauge in the process (or have to cluge it up - again as I understand it). I understand that Ms have the same tank but the pick-up / fuel management is different. My started at starving at 1/4 tank as and I got faster, with track tires, I now do not let it get below 1/2 while driving at the track. Turn 2 Summit Point, Turn in for 7 are the most common places.

Roundel - You maybe be right but all I know for sure is that it is a big issue with non-M e46s and not so much with Ms. They may do it also but at a much lower fuel level.

Now if I am wrong (and actually hope I am) and it is a simple part fix I would love to know.

[HughA44s]

https://store.vacmotorsports.com/vac...-e46-p739.aspx

Here is some info.

[N0tt0N]

Originally Posted by HughA44s

My started at starving at 1/4 tank as and I got faster, with track tires, I now do not let it get below 1/2 while driving at the track.

Bob drives so fast he starves with a FULL tank

[Trak Ratt]

Originally Posted by HughA44s

https://store.vacmotorsports.com/vac...-e46-p739.aspx

Here is some info.

$500 and it may not work properly with stock fuel gauges and wiring harnesses. I'd like to here from the BMW racers on if they are using this or another alternative.

[HughA44s]

So would I. The e46 SPECs drovers must have a solution.

[arob]

My Spec3 (E36 325is) starves at 1/4 tank.

Just this year, the Spec rules allowed for dual fuel pumps. As stated before, you lose the fuel gauge, of which I'm not a fan. I like to know exactly how much gas is in the tank, as I know exactly how much gas I need for both a 25 minute and 40 minute race.

Funny enough, I spoke to the shop that built my car this morning about adding a second pump, and expressed my concerns about having to know exactly how much fuel was in my car, at all times. For me, I'd rather put some fuel in my car until the needle reaches the desired level, run the race, and forget about it. Before the next session / race, check where the needle is, and refill as necessary. Much easier for this lazy guy. I don't want to have to calculate numbers of gallons that "should/might" be in the car, how long the session was, factor in if there were any double yellows...."

I'd rather pull more weight out of the car in order to ensure I still make weight at impound with a working fuel gague, than play the guessing game all weekend.