Fuel Injector Sizing

78P930 · 78P930's Garage

First question is: What size injectors are stock on a 78 Euro 930?

Second question: Should I change size if all I have done is add a K27 and SC cams?

DonE · 01-08-2006, 05:23 PM

Someone will need to look at the shop manual to see what cc rate the stock CIS injectors produce. That being said, there is only one size from Porsche. You might be able to look at other European cars to see what size injectors they used. Keep in mind that good stock injectors (ideally, matched) can produce up to 425 rwhp.

If you want to increase the amount of fuel, this can be done through the modification of the WUR and fuel head. The WUR modification can increase the fuel delivery across entire power band and the fuel head mod can increase the amount of fuel delivered at the top end.

78P930 · 78P930's Garage

Thanks Don.

DonE · 01-08-2006, 05:39 PM

Sorry - to answer your second question, no need to change injectors for those mods.

Henry Schmidt · Henry Schmidt's Garage

As far as I know there is no other injector to replace the stock injector.

The other information about WUR and Fuel distributor are accurate.
Image Auto will rebuild the fuel distributor for increased flow if your looking to make more than 400 HP
.