col cos1

iTrader: (5)

injectors?

any pics of them?

dave green

I use siemens 600cc injectors. could take a pic of one tomoz if that helps


Dave

Christian and Beccy

iTrader: (14)

Click on the link in my sig, you'll see the Siemens 600's.

Not sure if the 1000's are the same body, but I would guess so.

NEIL A

iTrader: (6)

Col im going to be running the 83lb/hr seimens think there around 750 cc ment to be good for near 600bhp.

col cos1

iTrader: (5)

cheers for replies guys

ive got a new set but they dont look nowt like they 600`s etc they are short and fat instead of the long body on your ones

got them from matt lewis new so im sure they are spot on

its just ive always used bosch and there is no visible pin etc ,take it thats due the spray pattern?

trevCOSS

iTrader: (6)

my 83lb ones look the same as the std bosch injectors only black

Staffi

iTrader: (1)

I use them, just like the ones Christian has pointed out..

col cos1

iTrader: (5)

il get a pic up tomorrow

the bodies on mine are half black..half dark green or grey

Christian and Beccy

iTrader: (14)

I bet they have the same body style as the Denso 525cc ones that I am about to put up for sale.

scoooby slayer

iTrader: (4)

im sure thats whats in my car 83 lb 865cc siemens good for up to 650 hp so stu said iirc

NEIL A

iTrader: (6)

Scoooby slayer i got mine from Stu so will be the same.

STUCOS

iTrader: (8)

Col use 83ilb siemens ,work out at 875cc,look just like black bosch

cheeRS stu

escort700bhp

1000 s are very fat compared to normal
i have aset ill get a pic up

escort700bhp

Martin-Hadland

iTrader: (2)

The injector on the right is not a Siemens is it? Looks more like an MSD..

leecavturbo

[quote="martin-reyland"]or sometimes called a Rochester i think

Mark Shead

The injector on the right can be known under a few names, MSD, Dephli, Rochester these are 96lb,
I have tested many of them and are rarely flowing or have the same spray pattern,
But these did change maker and some of the problems where fixed the early versions locked out under high pressure,
I refuse to use these when I need a large injectors for the reasons I have posted.

Mark

rapidcossie

Do people think a 750 is good for 650bhp?

My Rc1000cc are running a duty cycle of 78 when flat out in the car at approx 550bhp so wouldnt fancy running a 750 at my power level nevermind a 100np more.

leecavturbo

this is a 865cc siemens so i'd presume
the 1000cc would look like this and not like
the slim body 610cc ones,
.
http://www.fiveomotorsport.com/Parts...iemens72lb.jpg

leecavturbo

thats surprising maybe you should move from 3 bar to 3.5
bar fuel pressure if thats the case, i presume your on 3 bar
from the duty your running?

escort700bhp

dunno but matches the description??

mark , ive never used them ,had them a few years

for sale if anybody wants them?

escort700bhp

im running 4 750cc inj on my 678bhp engine

rapidcossie

flow reduces as you up pressure tho so would this not add to duty?

rapidcossie

The readings Im quoting were from my data logger after the runs at Brunters.

It probably runs a good bit richer here in the car than yours does on the dyno.

Would be interesting to see hows your injectors run in the car Alsitair

escort700bhp

i know i was just pulling your leg ,
howd you get on at brunters then?

rapidcossie

Think my car did well for the power/condtions

Jay,

iTrader: (4)

iirc 750cc are around 550bhp@fly 480ish@wheels

escort700bhp

not giving anything away then

rapidcossie

Just checked your thread.....

Your running 8 750's

escort700bhp

no , not on my other engine ,that engine in the pic is running 8 403 s{550cc)
this one below is running 4 750cc i think , maybe 850cc ,
it ran 678bhp on dyno

Mike Rainbird

iTrader: (3)

I certainly don't . I 100% concur with Alan, as my car was first mapped on the 750cc ones and it maxed these out before the top line was even reached . Switched to 1000cc ones, and am at an almost identical injector duty cycle as Euan's car (a bit higher in fact) and I can assure you I am nowhere near 650bhp .

rapidcossie

what injectors would you run next then Mike?

leecavturbo

the overall flow (lph etc)of the pump will be lowered with higher pressure,
so it won't effect your fuel rail flow or injector duty until
you flow more thru the injectors than the pump can flow
at your chosen pressure. understand?

rapidcossie

yeah lee....you wont efect the injecotrs unless you max out the pump first

leecavturbo

yeah basically you have a flow chart for your pump,
you pick the pressure your gonna run and see if the flow
is above the lph that your injectors would run @ 100%

scoooby slayer

iTrader: (4)

the injectors are 865 cc not 750 cc
ive got 865cc 83 lb siemens 480 hp and injection pulsewidth h on my msd mapping sheet is 13.94 max if that means anything

Cosworth Bassie

These are milliseconds.
20 milliseconds at 6000 RPM is 100% dutycycle.

Stu.H

Here's my old ones, although these were 660@3bar and 850@5bar

Mike Rainbird

iTrader: (3)

Next for what power level?

Personally, if I was to go to more than the power I have, I would use eight smaller ones (the size of which would depend on power level) and a WRC siamese type fuel rail .

scoooby slayer

iTrader: (4)

6000 rpm is 13.69 on my graph. on standard fpr. so thats 68.45% dutycycle and im 480 hp. so in theory 100% dutycycle would be 700 hp.
although im not making 480 hp at 6000 rpm thats at 7500 rpm. im making 360 hp at 6000 rpm. can it be equaded like that or am i talking shit