Author Topic: Short Pico Injectors  (Read 8659 times)

Offline paul_f

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Short Pico Injectors
« on: October 06, 2010, 11:57:41 am »
I want to fit the shorter 38mm length Pico type injectors to my Jenveys so that the fuel rails sit lower (allowing a filter baseplate to be more easily fitted to the bodies)

I don't really want to buy new ones but does anybody know what sort of cars would have these fitted from the factory?  I am looking for a 4cylinder engine with approx 190hp (or about 300cc/min injectors) as these would approximately match my engine.

Cheers
Paul

Offline paul_f

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Re: Short Pico Injectors
« Reply #1 on: October 06, 2010, 03:31:58 pm »
Found some info here

http://www.competitionsystems.co.uk/product.php?id=141

Seems like they are used on bikes

Offline rob@vems.co.uk

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Re: Short Pico Injectors
« Reply #2 on: October 07, 2010, 09:35:50 am »
Possibly some of the newer Renaults too - might be wrong though.

Offline paul_f

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Re: Short Pico Injectors
« Reply #3 on: October 07, 2010, 11:13:50 am »
Yes you are right Rob, in fact most newer French cars seem to use them.

I have found that the newer ones all have split injection spray patterns though, so that they spray into 2 ports on a 16V head.

Ducati bikes use them and these have a single spray which would work for me, though I think finding a set of 4 (as they were on the V twin Monsters) will be almost as expensive at buying new ones

Offline rob@vems.co.uk

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Re: Short Pico Injectors
« Reply #4 on: October 07, 2010, 09:43:47 pm »
I wonder if the split pattern will make the slightest difference with regards to their position in the Jenveys.

Offline paul_f

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Re: Short Pico Injectors
« Reply #5 on: October 07, 2010, 10:17:26 pm »
Sorry what I meant was all the French car ones have a split spray..  If I buy new ones I can have either single or split.

I'm not sure if it would make any difference or not a single spray will spray into the port, whereas the split spray would spray on the walls of the manifolds/intake ports.

Offline rob@vems.co.uk

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Re: Short Pico Injectors
« Reply #6 on: October 08, 2010, 09:06:29 am »
Personally if the throttle bodies are a fair distance away from the ports, on top of an inlet runner, I'd give the cheaper split spray ones a go.
As I understand it (and I have a tenuous grip on this sort of thing at the best of times) in a vaccuum the fuel is drawn to the walls, and at atmospheric pressure the air speed will whip the fuel nicely into the air to produce a homogeneous charge in the engine - *

Cheap is a quality that overcomes many faults.

* - This may be total bollocks though.