from what i've seen, the TT supra pump is pretty much the same as the rx7. i have a tII rx7 with microtech, upgraded turbo, etc. I am using one of the big bosch pumps, which is what i would recommend using, it pumps a lot more then the walbro, and it can still be mounted in the tank and everything. i had a problem with fuel pressure dropping at high rpm under boost. i put a relay back by the pump and ran a bigger guage wire right off the power lug on the starter to the relay so the pump now gets way more voltage. it picked up 10 psi of fuel pressure where it was dropping before, and the pump is audibly like twice as loud.