miHo_BG

Hello I am writing from bulgaria....i started a small turbo project....i want 0.4 bars boost..on a 1.4 litre D14a2 engine made in the UK with block...intake manifold...injection system....with 240cc injectors...and some other parts from d16z6...exept pistons rod...valves...springs and so on...i dont know how this happened but i am prety sure now i will use p28 ecu... so and some peple tell me that i have to change the injectors with bigger...they say 340cc i not enough....440cc is what i need....some other say 340cc is too much 240cc i good....damn i feel confused...please tell me the truth....i am sorry if you have already wrote about it...but i need help....thank you all in advance

KeyserSoze

Hey man welcome to Honda-Tech (H-T). Here is a good link to how to calculate what size injectors you would need. Injector size should be determined by max horse power not by how much boost you run. Different turbos will flow different amounts of air at the same pressure ratio. Take a look at the link and if you have any more questions just ask away.

http://www.robietherobot.com/s...e.htm

Also, the search link (the red link in the upper right hand corner of the page) is very helpful. Just remember to check the "Archived" box as many questions have already been asked.

And check out the faq's on the top of the "Forced Induction" forum. They have a lot of info that you will find helpful. Good Luck.

miHo_BG

thank you very much......i will read a lot these days i think



Modified by miHo_BG at 7:49 AM 8/27/2006

miHo_BG

System fuel pressure @ fuel rail ..... PSIG damn dude what is this...i know onlu BAR about pressure ...damn....i cant understant you measurement values....damn...please help me ...we talk about 150-60 hp maximum....i hava 240 cc injectors an AFR Fuel Regulator.....so please help i can not calculate anything without knowing what do i have to enter


Modified by miHo_BG at 8:45 AM 8/27/2006

KeyserSoze

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by miHo_BG &raquo;</TD></TR><TR><TD CLASS="quote">System fuel pressure @ fuel rail ..... PSIG damn dude what is this...i know onlu BAR about pressure ...damn....i cant understant you measurement values....damn...please help me ...we talk about 150-60 hp maximum....i hava 240 cc injectors an AFR Fuel Regulator.....so please help i can not calculate anything without knowing what do i have to enter</TD></TR></TABLE>

1bar = 14.5 psi.

Typically fuel pressure is regulated to ~43/44psi, so 2.97/3.03 bar.

The link gives a general guidline to picking injectors that goes somethin like this in your case........

(240 cc per min)/10.5 = 22.86 lb/hr

(22.86 lb/hr)*2.04 = max hp of 46.63 per injector

46.63 * 4 = ~187hp

Remember that these are ballpark figures. The 240cc/min will work but If I were you I'd just get the next larger size and be safe. Or get even larger ones if you are planning on making more power later (even with a different engine). It sucks to have to buy injectors AGAIN just because they are a bit to small. I said screw it and got 1000cc injectors.

miHo_BG

the thing is that i want 140-150 hp for now until i got money for bigger injectors....tough pistons....rods....springs....camshafts...and so on...mu point is can i run 140-150 on stock injectors....till i say i need more power and change everything else?...thank you in advance dude...my car stock is 90 hp...now it is may be 100 with headers...AFR...COLD AIR INTAKE....generation...spark plugs(they do not increase power )...and half of these will be taken off....so 140-150 i too much for 0.4bar boost=6.5psi ...what do you think

KeyserSoze

I don't know what your tuning options are over there, but with a halfway competent tuner I would have no worries about running at 150whp.

However, don't take only my word for it, I haven't seen many boosted d14's.

Maybe someone else can chime in here and help out.........

miHo_BG

THank you very much...the thing is that i got an offer to change my stock injectors for 340cc but I don't know if they are 340cc...the guy could be cheating cos he wants to get back to normal his d16z6....i don't now how to find out if he is not...he say that there is a number on them but i can't find anything(2HC9 is the number)....and the other thing is that here everyone thinks that he is some kind of engine god and talks bulshits thinkin that he is right thats why i can not trust such people and i look for help here...and i am very grateful to you for helping me....I don't now any D14 booster...in fact my fastback is one its kind in mu country....no such other....with transplanter altezza lights from accord...so the only thing i power left...thank you again