Injectors

[zachdeagle16]

I am currently running a rewired 190 fuel pump, with rc 550's, with an evo III 16g. My injectors are hitting 100% at 19 psi. I'm planning on getting an afpr, and Fic 650's, Would this be enough to support my turbo, or should I get some bigger injectors. Also My chip is compensated for 550's, so if I used 650's, would I need to set my translator to 550's?

 

[HIGHPSI4]

650- 680 will work, however, with the translator you can use much bigger injectors. This may prevent you from having to upgrade injectors again and save some money. You should calculate the % difference from the 550 to the 650 and adjust the translator based from that value.

 

[mastadogg2]

I wouldnt get to big of injectors without some proper tuning software like dsmlink. I would throw in some pte 680's or denso 660. personally I would recommend the denso's even tho i have pte myself. I use 90% duty cycle myself with 680's on a evo3 16g @ 26psi

 

[staticbrainwash]

650's are about 18% bigger than 550's. So thats that.

If your chip is burned for 550's over the stock 450's that a 22% difference. If you're still using piggyback tuning devices the most you can run is about 650's. But since the chip is burned bigger already take 650's and find out what injectors are 22% bigger. Thats about 800, but 750 to be safe.

But my math could be WAY WAY wrong on this.

All in all, i'd try running the biggest injectors you can get away with if you're just using maft and a chip. That way you know you can run on the safe side with duty cycle while still being in the "range" of safe piggyback tuning.

 

[mastadogg2]

chip + safc + pocketlogger will take you a long way. you could get very large injectors and then get the chip burned for the injectors. proper deadtime, a base global fuel and etc.. then fine tune it with a safc, and log knock via the pocketlogger. personally id get 660denso's they actually flow about 680-700cc.

 

[staticbrainwash]

If he doesn't want to get a new chip though. . . My statement stands.

But you're right, as long as he's getting a chip burned or re-burned he could go as big as he wants.

I still say to go with some bigger than 660's though, that way you're set if you wanna up boost more or get a bigger turbo.

"Do it right, Do it once!"