reccomendation for injectors
05-06-10, 09:11 PM
#3
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But ya,Rocket is Right,you can't just upgrade injectors without doing anything else to the fusl system.
it's like wiping Before ya Poop.it doesn't make sense!
Rtek is good Easy Ecu to slap on and go.It will make good power for the dollar and you don't have to Program it.
If you go to an Aftermarket fuel system like a Haltech,PFC or a the like,then you should really know what you are getting into.It can Get expensive but it can give you Bigger power.
05-07-10, 02:15 PM
#6
You can't keep the stock pump or leave the ECU stock, if you want to run more boost than stock & use larger injectors. If you stick larger injectors in, the ECU will still think they're 550cc and dump fuel into the engine. The stock ECU will also cut fuel at 8.6psi of boost. 10-12 psi or so is about the max you should run on the stock turbo, and it has potential to get you around the 250 whp mark.
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05-08-10, 01:13 AM
#9
1) An Rtek chipped ECU does not add power. Increasing boost does.
2) 550cc injectors are stock, so you should already have them.
3) A streetport with the stock turbo is not really going to do anything for power either. It will change how the turbo behaves, and actually make it less efficient at high RPMs.
I think you're missing the point. Changing the fuel pump is very easy, and the first thing you should do when attempting to get more power out of the engine. Larger injectors give you headroom so you can increase airflow, and not run into the injectors maxing out at higher power levels.
2) 550cc injectors are stock, so you should already have them.
3) A streetport with the stock turbo is not really going to do anything for power either. It will change how the turbo behaves, and actually make it less efficient at high RPMs.
I think you're missing the point. Changing the fuel pump is very easy, and the first thing you should do when attempting to get more power out of the engine. Larger injectors give you headroom so you can increase airflow, and not run into the injectors maxing out at higher power levels.
05-09-10, 12:52 AM
#11
Throw in the Rtek 1.7 chip, and you have my original suggestion. Walbros also have the side effect of driving up fuel pressure at idle/low throttle, so you will end up running rich under those conditions. The variable resistor can help a little with idle mixture, but it won't be exactly like stock. You can get a used FD fuel pump in the 3rd gen classifieds for about $20. Both will be more than enough for an engine with the stock turbo.
If your car is an '88, as the profile says, you have high impedance (saturated) injectors. Almost all aftermarket injectors are low impedance (peak & hold), so if using them, you'll need to wire in 6-10 ohm, 10-20 watt resistors on the secondary injector wires. The easiest place to do this is at the ECU. Cut 2 wires, and add in 2 resistors.
If your car is an '88, as the profile says, you have high impedance (saturated) injectors. Almost all aftermarket injectors are low impedance (peak & hold), so if using them, you'll need to wire in 6-10 ohm, 10-20 watt resistors on the secondary injector wires. The easiest place to do this is at the ECU. Cut 2 wires, and add in 2 resistors.
05-09-10, 01:52 AM
#12
well i actually found these injectors and was wondering if i could use them btw thanks so much for the holp youve been a great deal of help
http://www.rceng.com/Saturated-Injec...750-P63C6.aspx
http://www.rceng.com/Saturated-Injec...top-P64C6.aspx
and ill try to find an fd pump.
http://www.rceng.com/Saturated-Injec...750-P63C6.aspx
http://www.rceng.com/Saturated-Injec...top-P64C6.aspx
and ill try to find an fd pump.
05-09-10, 06:56 PM
#13
RC injectors are good, and the 750cc vs. 720cc difference won't really be noticeable. You'll just get a little bit of extra fuel (4% more) under moderate to heavy throttle, which is actually a good idea anyway. You'll need the denso style injectors, which are what your second link shows.
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