maf/turbo question

tak2099 · 12-04-2009, 09:52 PM

A friend of mine is selling a gt45 turbo for pretty cheap, and for now I still plan on using the MAF. My question is: Would changing the diameter of the intake pipe after the MAF effect anything? because the turbo inlet is like 4 inches.

cre · 12-04-2009, 10:48 PM

No, it won't damage the AFM (MAF is generally associated with a completely different type of air flow meter), but if the turbo flows much more air than stock you're going to hit fuel cut much sooner on the stock AFM and stock injectors... keep that in mind. If the turbo wasn't already used in a Supra you may also want to do the math and see if it's going to have a lot of lag or if it's going to choke on the top end.

12-04-2009, 09:52 PM	#1
tak2099 3" Exhaust Join Date: Jul 2007 Location: ohio Posts: 90	maf/turbo question A friend of mine is selling a gt45 turbo for pretty cheap, and for now I still plan on using the MAF. My question is: Would changing the diameter of the intake pipe after the MAF effect anything? because the turbo inlet is like 4 inches. __________________ 1988 supra turbo. In process of modding:Roll cage, seats, dp, 3" intercooler, fuel upgrades, and turbo upgrades next.

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12-04-2009, 10:48 PM	#2
cre Toyota Racing Development Join Date: Apr 2007 Posts: 5,038	No, it won't damage the AFM (MAF is generally associated with a completely different type of air flow meter), but if the turbo flows much more air than stock you're going to hit fuel cut much sooner on the stock AFM and stock injectors... keep that in mind. If the turbo wasn't already used in a Supra you may also want to do the math and see if it's going to have a lot of lag or if it's going to choke on the top end.