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Injector sizing. Help!!!!

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Old 06-03-17, 02:49 PM
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Injector sizing. Help!!!!

Been working like crazy on my 93 single turbo FD and I'm at the point now where I need to buy injectors. First thing, my horsepower goal is 550. Need to know what injector size will get me there (note: I am terrible at math)
motor specs: Borg 366 single turbo
petit racing intercooler
twin scroll manifold
tial 44mm waste gate
custom 3" down pipe with re-Ameniya dolphin tail muffler
petit starter booster
koyo radiator
apexi Power FC standalone ecu with FC commander
greddy BOV
greddy intake elbow
polished upper intake manifold
pineapple racing LIM with heat sink
CJM s1 fuel system (2primary 2 secondary)
walbro 450 fuel pump and stainless 3/8 fuel lines
CJ pump hanger
sake bomb IGN-1A ignition
3mm goopy seals
street ported
large single mishimoto oil cooler with mishimoto thermostat

i also have a cooling mist meth kit, but was avoiding installing it. So from what you have read. What size injectors should get me to 550 hp. I know there is an injector sizing sticky but like I said math isn't my friend . Also if you see something that you think I should add please lmk.


cheers

justin
Old 06-03-17, 06:17 PM
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Originally Posted by Blaster5337
Been working like crazy on my 93 single turbo FD and I'm at the point now where I need to buy injectors. First thing, my horsepower goal is 550. Need to know what injector size will get me there (note: I am terrible at math)
motor specs: Borg 366 single turbo
petit racing intercooler
twin scroll manifold
tial 44mm waste gate
custom 3" down pipe with re-Ameniya dolphin tail muffler
petit starter booster
koyo radiator
apexi Power FC standalone ecu with FC commander
greddy BOV
greddy intake elbow
polished upper intake manifold
pineapple racing LIM with heat sink
CJM s1 fuel system (2primary 2 secondary)
walbro 450 fuel pump and stainless 3/8 fuel lines
CJ pump hanger
sake bomb IGN-1A ignition
3mm goopy seals
street ported
large single mishimoto oil cooler with mishimoto thermostat

i also have a cooling mist meth kit, but was avoiding installing it. So from what you have read. What size injectors should get me to 550 hp. I know there is an injector sizing sticky but like I said math isn't my friend . Also if you see something that you think I should add please lmk.


cheers

justin
180+ views, and you know why you don't have an answer.
RX7Club hates people who don't search.
Sure you're not good at math, but I guess you can't read either, apparently no one else has made 550HP, used your turbo setup, or posted their fuel setup either.
You also never said pump or e85.

You're pushing boundaries.

Old 06-03-17, 07:12 PM
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Well I guess if you had seen the ecu I was running you would assume 93. So yes 93. So I'm guessing the way things work on here is once all the questions are asked then no one is ever allowed to ask that question again without being belittled? Is that the type of forum you want to be a part of where if you ask a question the only response is "your an idiot look at the sticky"? Am I doing something illegal by posting this. If you have a problem with the post or are annoyed by it just hit the back button and don't reply that easy.
Old 06-03-17, 07:41 PM
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Originally Posted by Blaster5337
Well I guess if you had seen the ecu I was running you would assume 93. So yes 93. So I'm guessing the way things work on here is once all the questions are asked then no one is ever allowed to ask that question again without being belittled? Is that the type of forum you want to be a part of where if you ask a question the only response is "your an idiot look at the sticky"? Am I doing something illegal by posting this. If you have a problem with the post or are annoyed by it just hit the back button and don't reply that easy.
I never asked what car you have, I asked what fuel you were using.
Pump 91? Pump 93? Race gas 100? 110? E85.

You are doing yourself no favors with this. The new members section also have two very detailed search tutorial to avoid threads like this.
The unspoken rule is yes, it is illegal and redundant. It makes searching for information way harder, when we have to read XX amount of threads about injector sizing with no relevant information, other then a help me help me.

Mahjik used to link answers to threads which have been answered or easily searched. Haven't seen him around, pretty sure he got tired of doing it.

Take a look at the 3rd gen section, and see what others have bellittled pointless threads/post just this morning.

And to answer your original question.
https://www.rx7club.com/single-turbo.../#post11218220
https://www.rx7club.com/single-turbo.../#post11836300
https://www.rx7club.com/single-turbo.../#post11786576

Last edited by silentblu; 06-03-17 at 07:43 PM.
Old 06-03-17, 08:23 PM
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Thanks for that one link. It actually helped! Cheers!
Old 06-10-17, 08:05 PM
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you have a properly sized turbo for your 550 hp objective.

i do think your single 44 WG might produce boost creep with the S300 66 although it will depend a bit on your manifold design. i suggest a 60 if you want to stay w a single WG or dual 44s.

550 on gasoline at 10.5 AFR requires that your four injectors total no less than 6200 CC/Min

"i also have a cooling mist meth kit, but was avoiding installing it."

recommend you install it before you do any boosting or you will be calling an engine builder.

i also suggest you pick up a Datalogit as the Power FC is easy and fun to road tune. even for those a bit less math inclined

good luck




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