Does anyone know if the dimensions of the DEK fuel rail is the same as the 3.5L? Also is there any ECU or sensor problems i could experience?

Sorry if i am asking alot questions but i don't have any info on a 5th gen w/ a 3.5 swap.

 

As for the fuel rail, if you are planning to swap it, I dont think it will work. You can use your old injectors though. From what I have read, the returnless fuel system is better anyways. There is a diagram in the 35swap Stickie on how to run the fuel lines.

The sensor problems are the Cam and Crank sensors which why you will swap the 30timing chains and covers to reuse the stock cam and crank sensors. Since you have a 2000, it is likely that you have an EGR system. The 02-03 motors do not have an EGR system, some people just leave it the electrical connector in the EGR vavle and do not get CEL's(but I believe you will get a CEL if you do it this way), other put resistors on the connector to fool the ECU into thinking the EGR is working.

 

My egr is already disconnected so that isn't a concern, but thanks for the info kevlo. I saw that the 3.5 fuel rail is returnless, but i was just asking since it is topfeed and shaped just like my DEK rail

 

Swap either the VQ30 rail or search for the couple threads in here on how to add a FPR to convert the VQ35 rail to a return style.

You want to run return style.

 

Here's how to keep the VQ35 rail and convert it to return style:
http://forums.maxima.org/showpost.ph...8&postcount=17

Or another way:
http://forums.maxima.org/showpost.ph...5&postcount=10

 

Well I guess the pic I reference in my post meant to convert it to return style, my bad.

 

Returnless is ideal for NA, but for FI you want return style since it linearly increases fuel pressure with boost.

Plus, return style is easier to do, since the VQ30 doesn't have a FPR in the fuel tank and he already has the return line.

 

If you use the method that you give a link to above, the fuel rail is returnless, but you still have the fpr and fmu, hence you retain the linear increase in fuel pressure with boost pressure.

fuel tank
|
filter
|
tee --> fuel rail
|
fpr
|
fmu
|
return to tank



.

 

It's still return style, ie fuel returns to the tank vs. deadheaded at the rail.

 

It's both.

The only difference between this method and the oem returnless system is the placement of the fpr. The oem fpr is in the tank, and the modified returnless has the fpr in the engine bay (but removed from the fuel rail). So you will still get some heating of the fuel from traveling into the engine bay, but you don't get anywhere near the temp rise of the 4th gen system because the fuel doesn't travel through the fuel rail and back to the tank.

 

True....

It's still a return style fuel SYSTEM, you just created a returnless fuel RAIL hybrid.

Just to keep it simple, returnless style = VQ35 and return style = VQ30 in my posts.

 

I don't have a fmu so wouldn't that cause a problem with this setup?

 

isn't this the option i should go with return style just using the 3.5L with 3.0 fpr and damper? Also if i did this i could keep my fuel line as is which would be much easier.

 

"I don't have a fmu so wouldn't that cause a problem with this setup?"

No, your filter is also in the tank compared to that setup.

 

so the 3.5l fuel rail with 3.0 fpr and damper is a no go?

 

I'm not sure which is easier/better....nismo3112's way or StephenMax way.

I was just saying your not having a FMU didn't matter.

 

Have you decided which heads/LIM/UIM you're using?

1)Pathy heads/DEK LIM/DEK UIM
or
2)Full VQ35

 

right now i am thinking of just using the 3.5 upper and lower IM. I would like to do the PF heads but i hear there are concerns of whether or not they will actually cause a power loss

 

I would buy an adjustable FPR and just use either the SX7R fuel rail fitting or drill the guts out of the stock FPR like SM did.

 

Okay, then that means you can't use the VQ30 fuel rail IIRC, so you need to pick either nismo3112 or StephenMax route.

 

already done and done. Got the SARD FPR w/ SX7R fuel rail fitting

 

Just so i am clear on this, nismo3112 just took the 3.5L fuel rail and bolted on the 3.0 Fpr and damper, correct? If so i will just do that.

 

The VQ35 rail has a damper on each end(fpr is in the fuel tank). He then took a '95 FPR and somehow modified it to fit inplace of one of the dampers.

I think the SX7R adapter or a VQ35 fuel rail adapter I've seen for N20 kits would be cleaner, but I don't know how easy/clean nismo3112's way turned out.