FunCarGo

I couldn't find no defnitive answer on this:

If I was to run about 500WHP on a 1JZ - can I use stock fuel lines (soarer TT)? If not, what sizes do I need for feed/return. Pump is going to be a walbro 400.

fried_rice

iTrader: (20)

Yes, I ran a single stock line with a 485, Bosch 1000's and a made about 600RWHP before blowing a W58 to hell. Another buddy made 676RWHP with a single stock MKIII Supra fuel line (smaller than the SC) and a single Walbro 485. Both were on E85...

Just use a -6AN to 12X1.25 adapter at the firewall fuel fitting, and the stock return line.

FunCarGo

thanks for your insight! maybe I have to use new line's anyways because the old fuel filter is stuck as f*.

fried_rice

iTrader: (20)

Best way to get the fuel filter off when stuck, is to leave it bolted to the chasis and buy a flare wrench. If that doesn't work Vise grips have yet to fail me. If it's super rusted you can buy a brake line flaring tool, or even rent one from autozone. That would allow you to cut the line off and re-flare it.

They are pain a lot of time, especially without a lift, The one I did today, came right off with a regular box head wrench. It's the first out of 20+ that just came right off. Also re-threading the fitting to the OEM filter is a pain as well and can strip, make sure to take time to thread it correctly. On the adapter use liquid Teflon.

FunCarGo

yea I tried everything you said weeks before, tried soaking it with rust solvent, no go. had all that stuff for flaring and a repair-fuel line on my to-buy list until I thought: are my fuel lines even sufficient?

the car is 25 years old and has probably never had the fuel filter changed, so it is bad.

maybe I just do the feed line with -8AN and leave the stock return. Repairing and improving the stock line (banjo bolt end) wouldn' be much cheaper, I think.