Author Topic: OCD 315 cc injectors too big??  (Read 1135 times)

Offline Bushpig

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OCD 315 cc injectors too big??
« on: August 18, 2016, 05:04:47 pm »
Hi,

Was woundering are only charged dubs 315cc injectors too big for a polo g40 that is not turbo'd converted , however is fairly modified , i am after g60 greens 250cc ones as i think my spec is on the limit of g40 injectors but greens are becoming harder to sorce.
Do the 315cc once installed just run to a fraction of there potential or do they flood the chambers 'all or nothing'??

Cheers 
Danny.

Offline polo classic

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Re: OCD 315 cc injectors too big??
« Reply #1 on: August 19, 2016, 08:52:59 am »
What is your complete setup so far?

PSD normally said you only needed redtops when going 1341 cc, high CR, ported head and wilder cams. I know that they where challenging to get to idle properly on 1341 cc engines

Offline Yoof

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Re: OCD 315 cc injectors too big??
« Reply #2 on: August 19, 2016, 09:17:04 am »
What is your complete setup so far?

PSD normally said you only needed redtops when going 1341 cc, high CR, ported head and wilder cams. I know that they where challenging to get to idle properly on 1341 cc engines

Not required with a G40 lader - 250cc/min is fine.

Offline Bushpig

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Re: OCD 315 cc injectors too big??
« Reply #3 on: August 19, 2016, 11:42:50 am »
This is the issue im having struggerling to find g60 injectors  :(


Offline Bushpig

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Re: OCD 315 cc injectors too big??
« Reply #5 on: August 23, 2016, 06:29:21 pm »
Has anybody had use of these chevy injectors ? Would they be excepted carnt see why not being bosch and correct pin connection??

What about ford injectors of the same cycle rate?

Cheers

Offline Andy

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Re: OCD 315 cc injectors too big??
« Reply #6 on: August 24, 2016, 08:22:20 am »
Be wary of those Ford injectors, the pintle design is completely different to the early EV1 Bosch injectors - and whilst their peak flow rate is the same, their spray pattern is vastly different to G60 'greens'.

This means that on a higher CR build (where you typically need less fuel than on stock 8:1 CR) it may well overfuel massively at idle, and it's not possible to map around - even when messing around with injector scaling in the map as well as the fuel map itself, at a few percent duty they just throw too much fuel in.

Offline Jester

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