MicroSquirt.com read only forum (Jan.15,2018)

I got some information on the stock 2002 GSX-R 750 injectors for a local Suzuki dealer.

The book states the Fuel Injectors are rated for:

168 ml (5.7oz) in 10 seconds at 43 psi.

How do you convert that to cc's?

It isn't as easy as 1 ml = 1 cc is it?

It isn't as easy as 1 ml = 1 cc is it?

Bow,

It is! Who said metric was easier....

Lance.

Yep. 1mL = 1cc

Bow wrote:... 2002 GSX-R 750 injectors ... 168 ml (5.7oz) in 10 seconds at 43 psi.

Wow, I didn't think they would flow over 1000cc's a minute! What are some power and torque numbers for that bike?

PSIG wrote:

Bow wrote:... 2002 GSX-R 750 injectors ... 168 ml (5.7oz) in 10 seconds at 43 psi.

Wow, I didn't think they would flow over 1000cc's a minute! What are some power and torque numbers for that bike?

THANK YOU!

That is what I was thinking, I guess the injector cc rating isn't per hour... ;)

the 2002 Model in Stock trim is only like 114 hp...

So I guess they are 168cc injectors...

Thanks for the calm, cool and collected answers, and for not flaming the living hell out of me...

Too bad they are WAY too small for my 2.4 liter... now to find some that will fit in the Throttle bodies injector ports... say... 330cc?

Normally, it's lb/hr or cc/min, so those would be 1008 cc/min injectors. That may sound crazy, but it may have something to do with the high redline. Suzuki may be trying to do some sort of sequential injection there, in which case the injector doesn't have very long to be open.

Matt Cramer wrote:Normally, it's lb/hr or cc/min, so those would be 1008 cc/min injectors. That may sound crazy, but it may have something to do with the high redline. Suzuki may be trying to do some sort of sequential injection there, in which case the injector doesn't have very long to be open.

So you are saying that I probably Could use these injectors on my KA24DE 2.4 liter with ITB's?

my understanding was, most all of the suzuki throttle bodies use 220cc/min injectors.

RPM doesn't make any difference on injector size, engine HP (or more importantly, fuel consumption) does though.

Uncle Bob,
That is not entirely true, RPM does have some impact.

Think of this, say your injector open time is 1ms.
Well, on a 5000 RPM engine, you have 12ms between burns, so that 1 ms lost to opening, isn't so significant only 8.5% lost to open time. You still have 11 ms.

Now a 13000 RPM bike motor only has 4.6 ms between burns, take 1ms off for open time and you are down to 3.6 ms, so 22% of the injectors time to spray is lost in open time.

Bow wrote:

PSIG wrote:

Bow wrote:... 2002 GSX-R 750 injectors ... 168 ml (5.7oz) in 10 seconds at 43 psi.

Wow, I didn't think they would flow over 1000cc's a minute! What are some power and torque numbers for that bike?

THANK YOU!

That is what I was thinking, I guess the injector cc rating isn't per hour... ;)

the 2002 Model in Stock trim is only like 114 hp...

So I guess they are 168cc injectors...

Thanks for the calm, cool and collected answers, and for not flaming the living hell out of me...

Too bad they are WAY too small for my 2.4 liter... now to find some that will fit in the Throttle bodies injector ports... say... 330cc?

I used supercharged Jaguar V8 injectors in my GSXR 750 throttle bodies, they are high impedance and flow 345cc min at 3 bar. The plastic cap on the very front of the injector is a bit bigger than the stock one and you will need to file it down a bit or drill out the hole in the throttle body to give clearance. The Jag uses a Ford engine and the injectors are marked Ford and Denso, I did not think to write down the part numbers as they were an ebay bargain
Bodies with jag injectors


Pic from Ebay


Mark