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Fuel Injectors
Posted: Wed Oct 08, 2008 3:23 pm
by grant4561
This is probably one for Brayden to answer.
I am looking to upgrade the fuel injectors in my Cappuccino.
The standard ones are 225cc and I need to upgrade to about 280-300cc injectors.
They must be the high impedance type.
What size injectors are in other Suzuki motors that may suit?
Posted: Wed Oct 08, 2008 4:07 pm
by Brayden
Yeah good question! I'm going to look at upgrading my injectors too, so I'll let you know what I find out.
Posted: Wed Oct 08, 2008 4:27 pm
by grant4561
Thanks, Ive had to back my boost off a bit as the standard ones are maxing out now.
Posted: Wed Oct 08, 2008 6:36 pm
by Brayden
How much boost are you running?
Posted: Wed Oct 08, 2008 7:10 pm
by calibur
the usual upgrade they do in japan is use 295cc injectors if that helps.
Posted: Thu Oct 09, 2008 9:36 am
by grant4561
Thanks, that confirms my estimate that I would need 280 - 300cc injectors.
Posted: Thu Oct 09, 2008 1:18 pm
by Will
grant send dave660 an pm on club cappo from memory he is using r33 injectors.
Posted: Thu Oct 09, 2008 1:38 pm
by grant4561
I might do that but his injectors would be huge.
Posted: Thu Oct 09, 2008 2:07 pm
by grant4561
Sorry Brayden I missed ypur post.
At present I am running about 12 PSI just for around town but @ 16 PSI the standard injectors are maxing out.
I plan to up the boost a bit more shortly so need to start upgrading a couple of things like injectors.
Posted: Thu Oct 09, 2008 2:17 pm
by Brayden
Thanks for the info. I asked because I had a problem maxing out my injectors on 7 PSI and it turned out to have two causes:
- Lack of fuel pressure
- Lack of electrical power
Turns out the stock reg was only holding around 25 PSI, and a wiring fault meant voltage was low. I was hitting 100% duty cycle at about 3000RPM!
Anyway, the other thing to consider is an aftermarket fuel reg (I recommend SARD) and wind up the base pressure. That will prevent your injectors maxing out for a while, but if you plan to run 16PSI regularly then I would go for larger injectors.
Out of curiousity, what turbo are you running to hold 16PSI? I plan on putting that through my motor but I know the little RHB31 will struggle!
Posted: Thu Oct 09, 2008 2:26 pm
by Will
stock cappa turbos can hold 16psi of boost. I believe the standard boost cut is 16.2psi also i believe grant is running a fuel pressure reg.
Posted: Thu Oct 09, 2008 2:28 pm
by grant4561
Yep, already have a rising rate FPR (cheap anti lean out insurance)
Still running the stock turbo which holds 16 PSI no problems but I have a Toyota (Hitachi) CT12 waiting to go on.
Posted: Thu Oct 09, 2008 4:27 pm
by Brayden
Interesting! Do either of you have the complete model number for the Cappa turbo? If it is the same as the one I am using then I will be very happy!
Posted: Thu Oct 09, 2008 4:35 pm
by grant4561
Theres a thread on the clubcappo site with the turbo details, I will see if I can find it.......................now where was it
Posted: Thu Oct 09, 2008 5:38 pm
by grant4561
Try this Brayden
Cappo tiurbo model & part Suzuki numbers
ea11r (IHI RHB31FW VZ24 RHB31FW-34004FP7NRBRFL2416CDZ VD110079)
The suzuki part numbers for the turbos are:
EA11R: 13900-80F00
EA21R: 13900-73810 (upto chassis number 101673)
EA21R: 13900-83CA0 (from chassis number 101674 onwards)