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hey guys just curious. i have stock type s injectors now and im running 7-8 psi. is that what they max out at? there 310 correct? what kind would i get i fi wanted to upgrade because i think they max out flow at 8 psi..help needed asap

 
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there are quite a few ppl on clubrsx running 6 to 8 psi... wouldn't recommend going higher without upgrading. Which fuel rails are you running?

 
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Alot of variables go into this. Depends on your turbo and whether you have a rising rate fuel pressure regulator or not. There is not "set psi" for an injector.

 
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^ Like Andy said. Chances are, you don't need bigger injectors than that. I run 8-9 psi on stock injectors.

 
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Depends heavily on your turbocharger, tune, BSFC, fuel system....Think more in terms of power levels than PSI. In theory, assuming stock FP, RSX injectors should max out at 175-210hp.

 
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mine are running fine at 225whp

 
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On what fuel pressure? Fuel system? EMS? AFR with a wideband? Datalogs? Duty cycle? Dyno sheet?

 
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are you using emanage????

 
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i am

 
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i know supercharged rsx's on low boost that run stock injectors at like 80-90% duty cycle

 
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at 177 WHP, mine are running at 95%. I need some bigger ones. Meanwhile an hour later, on the same dyno, Edwin's ran out of steam at about 163, So it depends on a lot, but most importantly, Air volume in. Its not power, its how much air you can shove in there that determines the fuel you can add with it. Bigger turbo, more air flow, need more gas. I'd imagine you probably can run about 8 or 9 psi with a smaller one, but maybe only 6 or 7 with something larger.

 
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Someone posted recently about modifying the RSX injector to increase the flow slightly. I think some people were seeing 340 cc out of it afterwards. This is by no meens recommended by me, just an extra option. Like andy said, having a rising rate regulator helps.. It increasing the fuel pressure according to how much boost it sees. (Ex. 10 psi from turbo the regulator adds 10 psi fuel) Of course if the injector is almost or is already maxed out then you should upgrade. It doesnt hurt to have more than enough rather than too little.

 
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i have and it can be done to modify stock 310 type s injectors to flow at 510. I have already done it to 4 sets of injectors now

 
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yeh alot of people have their injectors modded balanced and blueprinted...its a cheap alternative to buying another set...if your never going to use your stock ones again

 
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Very true, but the loop hole around this is more fuel pressure. So at 43 PSI of FP the injectors may be maxxing out at let's say 7 PSI on a T3/T04E 57 trim, but if you bump that pressure to 60 PSI or 80 PSI of FP then you may have enough fuel delivery (because the fuel atomizes better at higher pressures). I have seen numerous IS300, SC300, Supra and many other cars do it this way. They will use 550cc injectors on say 80-120 PSI of fuel and support 600+rwhp.