fuel rail question
#1
fuel rail question
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.
Sorry if i am asking alot questions but i don't have any info on a 5th gen w/ a 3.5 swap.
#2
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.
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.
#3
Originally Posted by Kevlo911
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.
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
#5
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
http://forums.maxima.org/showpost.ph...8&postcount=17
Or another way:
http://forums.maxima.org/showpost.ph...5&postcount=10
#7
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.
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.
#8
Originally Posted by IceY2K1
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.
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
.
#10
Originally Posted by IceY2K1
It's still return style, ie fuel returns to the tank vs. deadheaded at the rail.
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.
#12
Originally Posted by Stephen Max
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
.
fuel tank
|
filter
|
tee --> fuel rail
|
fpr
|
fmu
|
return to tank
.
#15
Originally Posted by IceY2K1
"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.
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?
#18
Originally Posted by IceY2K1
Have you decided which LIM you're using?
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
#19
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.
Originally Posted by chris'smax
so the 3.5l fuel rail with 3.0 fpr and damper is a no go?
#20
Okay, then that means you can't use the VQ30 fuel rail IIRC, so you need to pick either nismo3112 or StephenMax route.
Originally Posted by chris'smax
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
#21
Originally Posted by IceY2K1
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.
#22
Originally Posted by IceY2K1
Okay, then that means you can't use the VQ30 fuel rail IIRC, so you need to pick either nismo3112 or StephenMax route.
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.
#23
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.
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.
Thread
Thread Starter
Forum
Replies
Last Post
Hdnseek
5th Generation Maxima (2000-2003)
3
09-09-2015 05:55 AM