PDA

View Full Version : Boosting k series

K20Z3 BOOST
02-15-2009, 08:13 PM
I have a scheduled appointment with jordan up at MAP to have my si tuned around 11!
AlexD
02-15-2009, 09:29 PM
awesome! care to share your setup with us?
K20Z3 BOOST
02-15-2009, 09:45 PM
07 si wit rims and a body kit wit apexi exhaust is wat i am starting with! and i made my made my own setup ordering from different retailers..

440 rc injectors
walbro 255 fuel pump
57 trim wetfloat t3/t4 turbo
emusa intercooler
and pretty much everythin else is gonna be custom
AlexD
02-16-2009, 11:22 AM
sweet let us kno the results
Dez_Nutz
02-16-2009, 04:12 PM
waiting on results
jay33s
02-16-2009, 06:54 PM
:) sounds like its going to rip let us know....
K20Z3 BOOST
02-16-2009, 11:20 PM
possibly mite have to reschedule the tune for a day later next week cuz the turbo manifold i was havin bein made was made wrong.... they made it for the b series motor not the k series so i gotta take it back to the guy and have him start all over
da_dude
02-17-2009, 12:58 AM
You're going to max those 440cc injectors pretty quick. Unless you're planning on running some major low boost.
K20Z3 BOOST
02-17-2009, 09:25 AM
i planned on runnin like 8 psi or possibly 12.....
TurboEF
02-17-2009, 01:07 PM
A Z3? Have you considered a head swap?
da_dude
02-17-2009, 05:52 PM
i planned on runnin like 8 psi or possibly 12.....

What size turbo you running?
K20Z3 BOOST
02-17-2009, 09:34 PM
57 trim wet float
AlexD
03-07-2009, 07:48 PM
those 440s will be maxed or close to it at 300-350whp
4drcivicmaster
03-07-2009, 08:37 PM
300whp maxes out dsm 450's.. so.
AlexD
03-07-2009, 08:50 PM
on E85!
K20Z3 BOOST
03-07-2009, 09:23 PM
so if i run premium pump gas on the 440s i should be alright?
Vtecstyle
03-07-2009, 10:06 PM
yeah my 450 cc injectors were maxxed out i was at 85% duty cycle. So those are coming out. If i was K20z3 i would prolly look into getting some bigger ones. and at the same time run E85 105 octane cant beat that. Just remember it requires 30% more fuel.
K20Z3 BOOST
03-07-2009, 10:55 PM
alright i will see wat i can find for bigger injectors wat brands do yall suggest?
AlexD
03-07-2009, 11:18 PM
leave yourself a little room to grow. you dont really want to have a high duty cycle or else youll run into possible injector failures.

My suggestions are

Rc 750cc injectors, get the saturated ones to avoid buying a resistor box for them.

If you want 1000 CC injectors bosch just came out with some that dont require a resistor box.
K20Z3 BOOST
03-07-2009, 11:27 PM
alright sweet i was thinkin earlier i was gonna possibly try and find some 1000s if i could... i got rcs now
Midwestaz
03-10-2009, 11:14 PM
750's would be perfect. im running E85 on 750's
K20Z3 BOOST
03-11-2009, 07:34 AM
alright thanx i will look into it and see wat i can do...
kinetics
03-13-2009, 02:13 PM
Injector sizing:

BSFC - (Brake Specific Fuel Consumption): .5 for pump gas (+30% for E85 = .65)
HP - Target flywheel HP: Let's say 400
INJ - Number of Injectors: 4, obviously
LOAD - Desired operating peak load of the injectors, typically 80%

Do this:

HP x BSFC
---------- x 10.5 = Desired Injector CC
INJ x LOAD

So:

400 x .5
--------- = 62.5 x 10.5 = 656.25cc
4 x .8

Make the safe bet of getting at least a 700cc injector for pump gas for 400 flywheel HP.

E85 would be 853.125cc, so you'd might as well just go for the 1000cc at that point.
Type S
04-30-2009, 10:54 PM
was there any results?
Vtecstyle
05-02-2009, 03:52 PM
what kind of numbers did you get?