question on fuel
I have an D16A9 engine. I will soon turbo charge this engine. I will use an little turbo, garret T15 turbo. Do I have to increase the fuel injectors and fuel pump? Or will the stock fuel injectors and pump will hold up?
T15?? are you serious?
Too small..your engine will fall flat on it's face at higher rpm's..it will choke your engine...
for fuel..if you want to retain stock injectors and pump..get an FMU and call it a day and for boost wel...i would go higher then 6 psi with an FMU (12:1) With that tiny turbo you might get away with a smaller ratio though.
Do your research first and get a bigger turbo...a T15 is just a waste for a D16A9
Too small..your engine will fall flat on it's face at higher rpm's..it will choke your engine...
for fuel..if you want to retain stock injectors and pump..get an FMU and call it a day and for boost wel...i would go higher then 6 psi with an FMU (12:1) With that tiny turbo you might get away with a smaller ratio though.
Do your research first and get a bigger turbo...a T15 is just a waste for a D16A9
a) dont turbo a DOHC, puts to much pressure on the turbo (not good when the turbo u are talking about has a peak efficiency of 11psi)
b) dont use a FMU, that is stupid, you will blow your engine. (reason: FMU's bypass engine/fuel management systems that come with your car[located within the ECU]) your car will see the extra amount of air being brought into the engine, causing the injectors to open up to their maximum pressure allowed (53psi for your vehicle) your car however, will not account for the extra fuel. Making your engine believe you are running extremely lean, where, you are really, running your engine very rich. You can see how this is literally coming close to moving bomb. You will notice this as soon as you install it. The car will not idle right, acceleration will be very unsmooth, if you have a air to fuel gauge you will see the mixture turn extremely rich as the boost raises in your car. (note its very easy to go over the amount of fuel your car can handle causing a piston to break, or other related malfunction. My opinion, get on the Apexi website, look into a SAFCII, or Greddy E-Manage. HKS Also has some fairly cheaper devices you can use, these cost about $125, and well alter the air to fuel mixture as you increase the rpm's in your vehicle.
c) a Garret T15 turbo will not choke out your car. I myself have a 02 hyundai accent 1.5L SOHC, with that exact turbo charger setup. Given I do have bigger fuel injectors and a Apexi SAFCII to account for the fuel problem. The stock fuel pump/injectors will work fine at low boost. Dont take it over 8psi.
d) lower your compression ratio. (new pistons or head gasket) Currently it is 9.5:1, lower it to about 8.5:1, just change the head gasket. nothing more is needed. You want to do this because with the compression ratio you have now, on the down stroke of your piston, the valves open causing air to be taken in. If you dont have enough room for the boost to actually be affective (note that when I say 8.5:1 I mean inches, ex: 8.5" is the amount of space the piston travels from the top to the bottom of the cyl.)
e) get a oil cooler. Costs about $50-80 depending. It slips around the oil filter and has wings around it.. youll know what im talking about when you look at it.
f) t15's arent a waste to any 4cyl engine. espicially if you do not want to spend a ton of money. good luck, ive seen that turbo used on that engine. works fine. I would look into apexi safcII. at a minimum the HKS fuel management piggy back system.
additional note: i run 242hp to the front wheels with the turbo setup I have + some additional modifications. and no, my car doesnt choke. nor did it choke before I got the beta 2 fuel injectors. (my car came with 1.5L injectors) I also had my rpm redline set to 7300rpm. Never once choked in high rpm, infact, it creates a better flow of boost after about 4500rpm. nor does it lag in lower rpm (between 800-1400rpm)
but... like i said. dont turbo DOHC. In MY opinion all your gonna do is blow the bearings out, and end up spending a bunch of money to get the internals replaced.
(listen for the pings if you decide to go through with it.) youll hear about 50-60 ball bearings fling around your engine haha. give the turbo proper cool down time.
let the engine idle for 1-3 minutes after you have been driving
good luck anyway, dyno it and post em up when your done.
b) dont use a FMU, that is stupid, you will blow your engine. (reason: FMU's bypass engine/fuel management systems that come with your car[located within the ECU]) your car will see the extra amount of air being brought into the engine, causing the injectors to open up to their maximum pressure allowed (53psi for your vehicle) your car however, will not account for the extra fuel. Making your engine believe you are running extremely lean, where, you are really, running your engine very rich. You can see how this is literally coming close to moving bomb. You will notice this as soon as you install it. The car will not idle right, acceleration will be very unsmooth, if you have a air to fuel gauge you will see the mixture turn extremely rich as the boost raises in your car. (note its very easy to go over the amount of fuel your car can handle causing a piston to break, or other related malfunction. My opinion, get on the Apexi website, look into a SAFCII, or Greddy E-Manage. HKS Also has some fairly cheaper devices you can use, these cost about $125, and well alter the air to fuel mixture as you increase the rpm's in your vehicle.
c) a Garret T15 turbo will not choke out your car. I myself have a 02 hyundai accent 1.5L SOHC, with that exact turbo charger setup. Given I do have bigger fuel injectors and a Apexi SAFCII to account for the fuel problem. The stock fuel pump/injectors will work fine at low boost. Dont take it over 8psi.
d) lower your compression ratio. (new pistons or head gasket) Currently it is 9.5:1, lower it to about 8.5:1, just change the head gasket. nothing more is needed. You want to do this because with the compression ratio you have now, on the down stroke of your piston, the valves open causing air to be taken in. If you dont have enough room for the boost to actually be affective (note that when I say 8.5:1 I mean inches, ex: 8.5" is the amount of space the piston travels from the top to the bottom of the cyl.)
e) get a oil cooler. Costs about $50-80 depending. It slips around the oil filter and has wings around it.. youll know what im talking about when you look at it.
f) t15's arent a waste to any 4cyl engine. espicially if you do not want to spend a ton of money. good luck, ive seen that turbo used on that engine. works fine. I would look into apexi safcII. at a minimum the HKS fuel management piggy back system.
additional note: i run 242hp to the front wheels with the turbo setup I have + some additional modifications. and no, my car doesnt choke. nor did it choke before I got the beta 2 fuel injectors. (my car came with 1.5L injectors) I also had my rpm redline set to 7300rpm. Never once choked in high rpm, infact, it creates a better flow of boost after about 4500rpm. nor does it lag in lower rpm (between 800-1400rpm)
but... like i said. dont turbo DOHC. In MY opinion all your gonna do is blow the bearings out, and end up spending a bunch of money to get the internals replaced.
(listen for the pings if you decide to go through with it.) youll hear about 50-60 ball bearings fling around your engine haha. give the turbo proper cool down time.
let the engine idle for 1-3 minutes after you have been driving
good luck anyway, dyno it and post em up when your done.
Originally Posted by matt_bergin
a) dont turbo a DOHC, puts to much pressure on the turbo (not good when the turbo u are talking about has a peak efficiency of 11psi)
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