injector guide...
PassionFord Post Whore!!
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care to explain why Bill?
If this thread get's some attention from specialists I've always been interested to know why cosworth tuners run injectors so flat out. Not saying this is wrong but I remember reading how a lot of the Honda tuners in the states would say 66% duty cycle shouldn't really be exceeded.
Be interested to hear some expert opinion on this...
Been thinking about swapping the injectors in mine as it does make sense to me that if the boost ever goes over what it usually is for 440bhp the injectors won't be able to flow enough fuel so seems silly to have them on the limit. Also why I never udnerstood the gunship conversion, instead of just putting a set of greens in...
If this thread get's some attention from specialists I've always been interested to know why cosworth tuners run injectors so flat out. Not saying this is wrong but I remember reading how a lot of the Honda tuners in the states would say 66% duty cycle shouldn't really be exceeded.
Be interested to hear some expert opinion on this...
Been thinking about swapping the injectors in mine as it does make sense to me that if the boost ever goes over what it usually is for 440bhp the injectors won't be able to flow enough fuel so seems silly to have them on the limit. Also why I never udnerstood the gunship conversion, instead of just putting a set of greens in...
Try this link , quite a lot of bosch and weber part numbers are listed.
http://users.erols.com/srweiss/tableifc.htm
Regards Rob
http://users.erols.com/srweiss/tableifc.htm
Regards Rob
what bhp can they be used from though? for example could i use greens for 220bhp? as the beiges will be nearly maxed?
want to know what bhp they can be used from aswell..
cheers though
want to know what bhp they can be used from aswell..
cheers though
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Dom - because the CVH isn't as 'efficient' as a YB.
The 'idea' of the gunship conversion isn't really new either - my mate was running a similar strategy on his 3dr over 15 years ago. A mid range spike is okay, as you have the time to put the fuel in, whereas when you get to the top end of the rev's, you run out of time with the smaller injector.
As for the Honda thing - US tuning ideas seem different to the UK, and different cars have different traits and foibles. Plus there's many ways to skin a cat (just remember you only get one go per cat, lol) If a method works, it works - it won't stop people arguing their way is best though....
The 'idea' of the gunship conversion isn't really new either - my mate was running a similar strategy on his 3dr over 15 years ago. A mid range spike is okay, as you have the time to put the fuel in, whereas when you get to the top end of the rev's, you run out of time with the smaller injector.
As for the Honda thing - US tuning ideas seem different to the UK, and different cars have different traits and foibles. Plus there's many ways to skin a cat (just remember you only get one go per cat, lol) If a method works, it works - it won't stop people arguing their way is best though....
To let you know mate green injectors are the wrong ohmage for EEC-IV managment. There are only certain injectors that will work with it and they have to high ohmage, Cossies are all much lower.
However you can get round this using ballast resistors I believe.
Crazycage is on afteramarket management which is why he can use greens.
However you can get round this using ballast resistors I believe.
Crazycage is on afteramarket management which is why he can use greens.
Yes!!
In a nut shell, the CVH requires more fuel to create the same BHP/Torque as the YB.
Brake specific fuel consumption.
JAP CRAP,
Even if you're not running your injectors flat out, they still wouldn't flow any more than what the map is set to if your boost increases for what ever reason. The only way to increase the fueling is to change the map (assuming your injector duty cycle isn't on or close to the maximum) or the fuel pressure (but that knocks your mapping out off boost making it run richer).
In a nut shell, the CVH requires more fuel to create the same BHP/Torque as the YB.
Brake specific fuel consumption.
JAP CRAP,
Even if you're not running your injectors flat out, they still wouldn't flow any more than what the map is set to if your boost increases for what ever reason. The only way to increase the fueling is to change the map (assuming your injector duty cycle isn't on or close to the maximum) or the fuel pressure (but that knocks your mapping out off boost making it run richer).
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