direct injection cc size - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community

bulldog11267mad · 11-30-2013, 10:44 AM

i am looking to find out how big each direct injector size is. im looking at adding a aquamist methanol injection and trying to calculate my jet sizing i would need but i need to know the injector size.
thanks for any help you can give me.

mike the snake · 11-30-2013, 11:00 AM

Not sure about the size, but they only come in one size. It's the port injectors that people install bigger versions of depending on modifications to the engine and fuel used.

bulldog11267mad · 11-30-2013, 12:06 PM

I have a FBM premium turbo kit with 550cc injectors. But for calculating the correct size sprayers I need for the methanol I need to know my total injector cc. I have 550cc port injectors so that's 2200cc total for that but I also need to know the direct injector size to get an accurate calculation.

Td-d · 11-30-2013, 12:47 PM

I was trying to scour for the information literally yesterday, not easy to find. The first clue I found was was the Bosch DI system has a fuel flow rate of 22.5 cc/s @ 10 MPa.

bulldog11267mad · 12-02-2013, 10:45 PM

still looking for the DI cc size per injector.

mad_sb · 12-03-2013, 02:24 AM

Quote:

Originally Posted by bulldog11267mad

still looking for the DI cc size per injector.

What you really want to know is the flow rate not the size... DI flow rate changes with rail pressure which is variable on our setup. you should be able to to get a close enough calculation based on the target hp, afr on pump gas, and engine size.

Then just get a few jets that are close to your desired mix ratio and try them out to see what works best, thats what your gonna need to do anyway.

http://www.deatschwerks.com/resource...tor-calculator

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11-30-2013, 11:00 AM	#2
mike the snake Senior Member Join Date: Jul 2013 Drives: 2013 BRZ Location: Norcal Posts: 1,592 Thanks: 1 Thanked 623 Times in 378 Posts Mentioned: 15 Post(s) Tagged: 0 Thread(s)	Not sure about the size, but they only come in one size. It's the port injectors that people install bigger versions of depending on modifications to the engine and fuel used.

11-30-2013, 12:47 PM	#4
Td-d Garden variety obsessive Join Date: Oct 2013 Drives: 2009 Sti Hatch; 2015 Audi RSQ3 Location: South Africa Posts: 532 Thanks: 54 Thanked 448 Times in 245 Posts Mentioned: 74 Post(s) Tagged: 2 Thread(s)	I was trying to scour for the information literally yesterday, not easy to find. The first clue I found was was the Bosch DI system has a fuel flow rate of 22.5 cc/s @ 10 MPa.

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