Walbro on a SC400
#1
Lead Lap
Thread Starter
Walbro on a SC400
My SC400 came with a Walbro courtesy of the previous owner. I just wanted to be sure that this car doesn't have a problem with FPR overrun like some cars do. If there's a chance I've got jacked fuel pressure at idle I'll switch it back to a stock pump since I don't have any mods that require extra fuel.
#7
Lexus Champion
iTrader: (18)
Negative. Your OEM FPR prevents that. IIRC the 400 is the same as the 300 and will not run or idle properly with the Walbro unit in place the FP ECU not bypassed, mine didnt even start. Not to mention, our cars (except the 99 VVTi SC300 iirc) use a return fuel system.
Both the Walbro and the TT Supra Denso units have been used over and over again on stock SC's both 300 and 400 with the 12v mod, and ZERO issues. Your over thinking the flow rate of the pump, but not thinking about what your stock FPR or fuel system was designed to do. Now if you were using an AFPR and didnt have it set properly, then yes, your going to have some issues. But the stock FPR handles it just fine.
Both the Walbro and the TT Supra Denso units have been used over and over again on stock SC's both 300 and 400 with the 12v mod, and ZERO issues. Your over thinking the flow rate of the pump, but not thinking about what your stock FPR or fuel system was designed to do. Now if you were using an AFPR and didnt have it set properly, then yes, your going to have some issues. But the stock FPR handles it just fine.
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#10
Its all relative really the Walbro's are definately noticeably louder than stock and that whine is pretty annoying... I tolerate it because I need the extra flow and this is what I went with, but I could see how it would be unnaceptable to people wanting a quiet Lexus-like ride. Unless the OP really needs the extra fuel for some reason, personally I would stick with a stock pump.
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esco2114
SC- 1st Gen (1992-2000)
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02-11-11 02:35 PM