I've been talking about doing a conversion from our stock side feed fuel rails to DSM fuel rails. resons: stock talon turbo fuel injectors are 450cc's. fuel rails and injectors are about $60 each on ebay. one of my friends has an extra DSM motor laying around, I'm going to take the fuel rail off, and check for fitting. the major issue will be whether or not the cylinders are spaced differently, which I'm sure they are. If this is the case, it will still be very easy to make a new rail that will fit the VQ.

If a rail is out of scope, i may just run indevidual fuel lines to each injector. this would be alot easier, but more expensive, and I would have to find a way to distribute the fuel to each line.

Does anybody know what the pre 95 300z fuel rails are laid out like? if they are to feed, then it would be easy to get one of these rails and use DSM injectors.

 

I think you need a CNC place give them your old fuel rail and have them cut you one out of billet aluminum with new fittings to fit DSM injectors. Call some speed shops and see if they caqn do stuff like that, I know there is at least one place in Houston that can do stuff like that. The hard part is going to be wiring the fuel injectors and making sure they work right.

With bigger fuel rails, do they provide more fuel?

 

I would think the trickey part would be getting top-feed injectors to seal with the lower intake manifold.

A CNC should should be able to make custom rails. I don't think they'd be that complicated.

I don't know how you'd do individual fuel lines, because the FPR in the system has to be _after_ all the fuel injectors.

 

Do you know if the impedence of the DSM and Nissan injectors match. Running the wrong impedence sytle injector and it will fry your ecu.

 

As I looked into getting custom rails for my projects, I spoke to a few places.

For the VQ30 I spoke to well-known, not-local shop and they will produce them at 210$ per set.

I personally want a top feed low-impedence style setup (because I can get new 1600cc injectors for $337.50 total) and use autronic to control... BUT other setups will be available obviously.

The process has been started, I'll update with pics & company info once I receive my parts & rails back.

 

good god 1600cc

is it just me or is that overkill

 

yes, overkill even for my larger turbo setup. but for 374$ it's hard to say no

the only question I have is will it still be able to idle at low rpm without going shorter than the minumum pulsewidth on low impedence injectors? I have some thoughts on that, I need to just run the #s and find out. If so, 96# aren't too much more.

 

I have access to CNC here at school, but i don't know how to use them. I will soon be abble to take a cnc class, I will concider this option for a project....

until that time, Let me know how the topfeed process works... I want to see pictures. how will they mount under the uper intake plenim, or would a mevi be required...

As far as the DSM injectors, I know that Nissan and DSM injectors are high impedence. I'm not sure if they are exactly the same. that would be a good question to ask an afermarket injector company... does anybody know of one with a good reputation? I know that DSM 1000cc injectors are fairly cheap.

by the way hal, it's entertaining to watch you overkill, but heck, cars will never go fast enough. any Idea what kind of HP that will support?

 

my friend brought his DSM rail over yesterday, lets just say, I bid on some 370cc's on ebay. the spacing between the injectors is smaller than on our engines, and you would need to add spacers in the fuel rail. also you would have to come up with some new way to mount the rail. no thanks, I'll make my own rails

 

I thought it went without saying that you couldn't use the fuel rail from a DSM. Its an I4...there's no way you could use that rail on a V6.

Perhaps a rail from a top-feed Nissan would work...like the newer maxima's and Z's.

 

cripes...I assume by then you'll be ditching the FMU setup right?

 

you don't think that 1600cc injectors at like 80 or 90psi would work?

 

wouldnt 1600cc+90psi = 3200cc

haha that could support like 3000whp