scootz
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| posted on 25/10/13 at 08:18 PM |
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Fuel Injector Rates
Evenin
Picked up a set of individual throttle bodies that came with 4 Weber IWP042 injectors. T'internet states these will flow 240-ish cc per min and
are stable up to 5 bar (taking them up to 300-ish cc per min).
I'm fitting the TB's to a standard C20XE... going by the various reports out there, I should expect the red-top to make around 195 bhp
with a set of TB's.
Can anyone advise if these injectors are man enough for the job?
Cheers
It's Evolution Baby!
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big-vee-twin
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| posted on 25/10/13 at 08:35 PM |
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This should help link
Duratec Engine is fitted, MS2 Extra V3 is assembled and tested, engine running, car now built. IVA passed 26/02/2016
http://www.triangleltd.com
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scootz
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| posted on 25/10/13 at 08:40 PM |
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Cheers BVT! That calculator suggests mine won't do... I need 320cc per min injectors. 
It's Evolution Baby!
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big-vee-twin
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| posted on 25/10/13 at 08:59 PM |
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I'm using Bosch white giants which do 375cc
Duratec Engine is fitted, MS2 Extra V3 is assembled and tested, engine running, car now built. IVA passed 26/02/2016
http://www.triangleltd.com
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silky16v
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| posted on 26/10/13 at 07:23 AM |
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Standard XE won't do 195bhp with throttle bodies more like 175-180bhp run your fuel pressure at 3.5bar and those injectors will be fine
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Dusty
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| posted on 26/10/13 at 07:54 AM |
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Stan Weiss has put up injector flow tables here which are the most comprehensive I have found on the web.
Here. They also suggest that your injectors are not up to the job. 360ml/min will give about
52bhp per injector and should be about right. He lists your injectors as good for 33.7 BHP each at 80% duty cycle for engine with a BFSC of .52
[Edited on 26/10/13 by Dusty]
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jeffw
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| posted on 26/10/13 at 10:09 AM |
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Depends how far into the duty cycle you want to go....they will be pretty much flat out with no headroom at all.
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Volvorsport
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| posted on 26/10/13 at 10:22 AM |
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volvo b230ft .... 330 cc/min on a 4 cylinder , about right and on 3 bar too.
saab are rate a bit higher on the 2.3 versions...
peak and hold tho , so youll need resistors ..
www.dbsmotorsport.co.uk
getting dirty under a bus
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Uphill Racer
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| posted on 30/10/13 at 01:25 AM |
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When I made up my injection system I used Graham Bell’s calculations.
I also knocked up a system to check flow rates of the injectors at a given pressure.
Accepting that yours do what they recon they do and the HP figures are as silky suggests my calcs agree with his for what it is worth.
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daveb666
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| posted on 30/10/13 at 08:27 AM |
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quote:
Originally posted by silky16v
Standard XE won't do 195bhp with throttle bodies more like 175-180bhp run your fuel pressure at 3.5bar and those injectors will be fine
A bit off topic but I've had 2 'standard' XEs with Jenveys and both were over 200bhp; 205 and 209bhp respectively.
2007bc Photography - Commercial and Wedding Photographer based in West Yorkshire
http://www.2007bc.co.uk / http://www.huddersfieldcommercialphotographer.co.uk
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