This maybe something of a thought, a very expensive one if done right, but has anyone considered the though of adapting direct injection to 928s?

Porsche has been recently incorporating direct injection on their cars that will be released in mid-late 2008. The benefits of direct injection have increased horsepower and economy. This technology originated on diesels and is making its way into fuel injected engines producing great results. I'm curious to see what adapting a system like this on the 928 would do and what doors to further modifications would open up to our motors?

 

Where would you propose drilling the holes in the cylinder head for the injectors ??

 

Well you are talking to Mongo

 

All I have to say is that it's peanutbutterjellytime.

 

Mongo bored.

 

I didn't know you spelled "mongo" as D-A-N-G-L-E-R-B

 

or MORON

 

In all seriousness, this is the kind of technology that isn't easy to retrofit to older engines, as it's implementation appears to require that it be an integral part of the complete engine design.

But nothing is impossible.

Step 1: aquire a new Porsche with direct injection

Step 2: dismantle, reassemble, understand

Step 3: Once "understand" is reached, can system be extracted from new Porsche as unit(s) or is it too integral?

Step 4: Plan retrofit. First problem: where in the head? Next: support systems...

JEC_31 estimation of # of pleasantly challenging problems:





x 10

 

If those air cooled *** draggers can figure out a way to squeeze two spark plugs into each cylinder......we can fit in an injector

 

seems simple enough to me on the 32V head.....

move to a twin plug with each on the side of the injector (putting the injector in the original spark plug location).

no, I haven't done any measurements on this, but this stuff has been done on other engines long before this discussion came up............


---Russ

 

Sorry russ but a 928 engine isnt exactly a chevy. I doubt that there would be enough room, plus this would require EXTENSIVE head modification and we dont have crappy tin valve covers which are easily modified.

the covers on our cars are magnesium, good luck getting that modified.
be cheaper to setup a group buy and have a new head engineered and mold made.

 

i cant believe we are still feeding this topic

polish some wheel nuts or check or replace some fuses or something .........

 

isnt direct injection all about the injectors only firing when called for, rather than a batch firing as we, and most FI cars havfe? i dont think it means the injector needs to be sitting in the heads, to be direct injection. true or false?

mk

 

direct injection is a much higher pressure line fired directly into the combustion chamber.

its incredibly precise and an entire engine management system would need to be employed just to take care of the electronics aspect. That would actually be the easy part. The mechanical aspect would require new heads for a start, brand new castings ON AND ON AND ON!

just but a DI cayenne!

 

OK, I'll bite...where are you going to move the valves?