The factory MR2 tank isnt bad for fuel surge, it has some baffles and that small pot at the bottom the pump sits in, but for heavy track i would still use a surge tank.
If youre using a surge tank then the intank pump will only be to fill up the surge tank, which will just overflow back to the tank, most high pressure pumps, ie the walbro, dont flow that much fuel when not pumping up to a restriction (reg and injectors) so filling a surge tank which just overflows back it wont build up much pressure at all, flow rate is alot less, while still drawing alot of current and heating the fuel.
Most good in tank low pressure 'lift pumps' will out flow a bosch 044 and draw much less current (around 1 Amp when running compared to around 8 - 12Amps)
Below is a typical setup.
Its showing 3 fittings on the top of the surge tank, if you got one that had 1 on the very top and 2 on the side near the top, the very top will be the overflow to the tank, the 2nd highest typically return from reg and 3rd highest the feed from the in tank pump.
For E85 you prob know all about what it can do to normal rubber hoses, you can get some rubber hose thats suppose to be ok with E85 but the best would be Teflon hose.
You can get cheap 'smooth bore' teflon hose with stainless steel braid which has a high min. bend radius and if bent to hard can kink, or depending on your budget the best would be 'convoluted bore' with a material outer braid with crimped on hose ends (such as BMRS - Brown & Miller) which is highly flexible and light.
Teflon hose requires different hose ends then normal rubber, usually using an olive. Teflon hose also has a much smaller OD as the teflon is very thin, compared to thick walled rubber hoses.
Teflon hose will also not stink up the cabin with fuel smell if you run them in the cabin.
post edited by WIDEMR - 2013/06/16 21:52:50