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change to bigger injectors

A

art

CEG'er
Joined
May 9, 2004
Messages
119
Location
UK
I am fairly sure the beige injectors must be pretty well maxed out on full throttle, on my 3l port matched conversion
when remapped its max was 217 crank hp
since that I have optomised tb, ported manifolds, cold air feeds to ram air svt airbox
have just had a set of orange injectors refurbed, will a remap be able to find more power with the bigger injectors , or do you just end up with the same power and a reduced duty cycle
 
If your current injectors are truly maxed out, then bigger ones with a proper retune would yield more power.

What's your current A/F ratio under WOT? Does it change as the rpms increase?

Sent from my Note 3
 
how do you find out what duty cycle the injectors are at on full throttle. funny thing is when I completed the 3l conversion , the exhaust ends were sooty , ie impression it was running rich, and when I had remap done was sorted, then I carried out some more mods this winter, svt airbox, with twin ram air cold feed, optomised and half shafted tb, manifolds ported , and now end of exhausts sootier than ever . terry haines reckons beige injectors will be maxed out
 
sooty exhaust isn't all from runing out of tune. I had an exhaust on my stock SVT (previous owners cat delete) and it had soot on inside of tips. I put stock exhaust with cat on and very little sooting now.
 
art said:
how do you find out what duty cycle the injectors are at on full throttle. funny thing is when I completed the 3l conversion , the exhaust ends were sooty , ie impression it was running rich, and when I had remap done was sorted, then I carried out some more mods this winter, svt airbox, with twin ram air cold feed, optomised and half shafted tb, manifolds ported , and now end of exhausts sootier than ever . terry haines reckons beige injectors will be maxed out
Click to expand...

You can log the duty cycle with an xcal and a laptop.
 
if your exhaust is sooty with a 3.0L running 17lb injectors at stock fuel pressure....

then one of your oxygen sensors may be futzed. In which case your PCM could be dumping fuel to protect your engine....

check your fuel trims too .....G.
 
if there was a problem with an o2 sensor would the ecu not log that as a fault code
 
definitely no codes, but yesterday when the tailgate was slighty open, carrying large item , I noticed when I got on the throttle at low revs , I could smell what was drawn through the tailgate was petrol laden , trip compuper also showing better mileage at 65 mph compared to 50 mph , so is it possible a lamba is on the way out but not thrown up a fault code yet
 
what normally happens is they start to switch back and forth more slowly, especially at idle..... i've seen this happening on my software..... G.
 
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