Sequential injections

[John Howe]

If I am going to progress with plans for some form of powershift or paddle gearchange arrangement. Then it looks like I will saying good bye to my faithful Emerald ECU and moving to an ECU with more brass knobs attached!

 

Such a luxuary, I have just realised, will open up all interesting new possibilites, including sequential injection.

 

With a theoretical power output of say 230 bhp - can anyone offer an equation to suggest what inprovement sequential injection would add?

 

 

 

JH

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[CHRIS CLARK]

............................... quicker sausage deliveries ? 😬

[Bill Shurvinton]

The data I have available suggests that sequential will gain you at best about 3% extra power over batch injection, so 6HP and you may have to play around with a number of different injector patterns to get that. Where it will help is to tame lumpy cams at tick over and low RPM as you can squirt based on valve closing timing. Playing around with this you will find a sweet spot where the car runs best. But very little improvement for a lot of effort.

 

If you like spending as much time playing with the setup as driving, sequential is a lot of fun. If you just want to drive it is dubious unless you need to meet EU3 emissions (which you don't).

 

Bill

[Chelspeed]

And you'll need an extra sensor, a cam position sensor, for sequential. The extra weight of this will probably offset the benefit...

[edmandsd]

John - Sequential injection is definately beneficial but less so as rpm rises.

 

Home of BDR700

[John Howe]

Many thanks to you all for you comments.

 

JH

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