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Exactly what it sounds like. I've been rolling the idea around for awhile and wanted to run it by a few Nissan guys and see what you thought. I have the use of a full machine shop at my disposal so I'm not worried about that.
I will have a vg30e block soon when I swap out my old tired vg30 in my pathy for a vg33e swap.
I was going to do a basic rebuild and try to put injectors in the spark plug holes, use a Bosch inline pump from either a Mercedes om606 or a Cummins 12 valve p7100 pump.
Im just trying to figure out mainly how to time the injection pump… I plan on putting the pump on the stock wd21 ac pump bracket, making a double timing belt pulley on the driver side cylinder bank and using the extra pulley added on the end of the existing timing setup to run the pump.
I'm also wanting to run glow plugs in place of the factory vg30 injectors. But that's only if the pre chamber glow plug setup will work with the direct injection. Otherwise I'll have to put the diesel injectors in place of the stock vg30e injectors and run the glow plugs in the spark plug chambers.
I also have stock turbo manifolds that I'll be adding with the use of a gt35r turbo
I know at the least this will be one hell of an undertaking. But I thought that it could be done as evidence by the popular LD28 diesel. Tell me what you think and if you have any alternate theory of how this might work. =) -
I'll be honest, this is one of the vids that got me going down this rabbit hole. But I thought if he can swap that injection pump or the Cummins 12mm p7100 pump (according to him he has done it and so have others) to the LD28 then why can't I adapt the same tech on the vg30e?
http://youtu.be/N5ZMArBmtzU -
The pistons and combustion chambers aren't the right design. And the compression ratio is way too low.- VG30DET (HE341) 86 300ZX - 1982 280ZX Turbo - Headered NA 1986 300ZX 2+2 - 2000 Xterra - -
With at least 10.5 or 11:1 pistons I'm sure it's possible… however you need the fuel injectors and glow plugs directly in the combustion chamber.
I'm sure you can drill and modify the heads to fit it.
I don't remember what compression ratio the other gas direct inject engines run but I know it isn't as high as a diesel ratio.http://z31performance.com/showthread…2-2-(-now-NA2T
My build thread (: -
You need way more than 10.5 or 11:1. Diesels are typically 15:1 at the very minimum. -
What if we deck the heads and get sleeves with high comp Pistons? ARP fasteners for the heads and block internals? Possibly copper head gaskets or Mls if I can find em? I agree with what les_joey_paul said about drilling another hole next to the spark plug chamber, this would work to allow bolth the glow plug and injector inside the combustion chanber. It would work I think but I'll have to find a way to set it up on the mill. -
And your right ozzyrulez, even my old Perkins 4.192 in my old Willys jeep is about 18:1 or so -
The combustibilty is different from diesel fuel to pump gas.... I took a video lesson on the new kia direct injection cars a few years ago
I just did some research on the subject and found this, verifying the compression ratio of some direct injection engines are 10:1 to 11.5:1.
https://en.m.wikipedia.org/wiki/GM_s…e#Generation_Vhttp://z31performance.com/showthread…2-2-(-now-NA2T
My build thread (: -
Yeah on gasoline engines. He wants to do diesel. -
Oh I see now. Yeah. I think gasoline direct injection would be more suitable, but this is your idea and build and I'm interested in what you do.http://z31performance.com/showthread…2-2-(-now-NA2T
My build thread (: -
You will have a difficult time getting the compression ratios you need for diesel without running into valve clearance issues. -
I totally agree whith twotone, I can't really get past the compression to clearance without bad things happening.
I can't foresee doing this without about $10-15k of r and d on a new head and cam design with better combustion chambers, room for all the di bits, and provisions for a jake brake system. 😈
It was a cool idea, it will just have to wait a couple years haha!
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