For the more experienced guys.
What would be the pros and cons be of having the injectors placed in front of the intake runners rather than the norm of on the intake manifold ?
injector placement ?
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Re: injector placement ?
in front as in the plenum pointing into the runner?
too far away for low speed running, good for a second set though?
Drew
too far away for low speed running, good for a second set though?
Drew
Re: injector placement ?
I think he means squirting into a trumpet like the below?
As you say, OK for twin injector setups but I can't see it working so well at low rpms.
As you say, OK for twin injector setups but I can't see it working so well at low rpms.
Re: injector placement ?
understand now that each placement has its benefits.
stock location on the manifold is more practical for a street car.
stock location on the manifold is more practical for a street car.
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Re: injector placement ?
No real reason why not though. Most single point injections fire against the throttle plate.VR6Turbo wrote:I think he means squirting into a trumpet like the below?
As you say, OK for twin injector setups but I can't see it working so well at low rpms.
That's a nice looking setup there though !!
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Re: injector placement ?
Theres a reason they moved to multipoint though:
- No fuel on top of plates to explode
- Better atomisation at low throttle opening (drivability) instead of dribbling past plate
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Re: injector placement ?
I think the red rails are nitrous injectors, so would probably only come on at WOT when there's good gas speed. I suppose petrol injectors up there would atomise into the air stream quite nicely rather than impacting the back of the valves? Some engines may benefit from that I guess.
Re: injector placement ?
I know a few engine builders favour twin injectors as they air mid range greatly, not just high end rpm work.
I guess it would depend largely on the installation and length of the inlet tract, plus the engine its being used on and its pulse tuning etc
I guess it would depend largely on the installation and length of the inlet tract, plus the engine its being used on and its pulse tuning etc
Re: injector placement ?
was interested seeing i am busy making my plenum for the VR6.
Was looking at having the injectors facing the intake trumpets but the complication is the staggered intake length of the cylinders seeing that 3 cylinders are further back from the front cylinders by around 9cm's.
Was looking at having the injectors facing the intake trumpets but the complication is the staggered intake length of the cylinders seeing that 3 cylinders are further back from the front cylinders by around 9cm's.