flamin' =

First question: is there another way to test a maf sensor besides using the ecu diagnostics? reason: i'm sure the maf is acting up but i ran a diagnostics and the ecu is telling me everything is fine. any ideas ppl?

Second question: I hope this hasn't been discussed too much already. anyways..
I will be getting a vg on the side to rebuild sometime next summer. well...i got to thinking and i decided that i certainly didn't want to rebuild back to stock power. so heres a few things i thought of.
get the intake manifold ported and polished. bore out the cylinders to a achieve 3.3 liter displacement (i know that we have some extra space in our block to do this)- now i know that i would need new pistons. could the pistons from the pathfinder 3.3 liter be used? if so....i would probably need to keep the piston rods from the vg30 to push the larger pistons right? would i need to step up the fuel system to accomaodate the larger bore? if so....i'd probably need to get jwt to reprogram the ecu accordingly right? there's much more to it than what i've posted...but these are a few of the questions that have been picking at my brain.
thanks for any help you can provide.

 

1. buy a used VG. tear it down. take it to a REAL machine shop. let them do the work on it, and consult with you on the proper course of action.
probably would be better to buy a pathy engine to begin with and drop it in.


As for the MAF, you need to hook up a voltmeter to it (probably a high impedance analog meter will be best)
and go for a drive. watch it for consistent output. as the engine sucks more air, the voltage should go up smoothly. if it doesn't, then you've got a MAF problem.

 

Don't forget to swap on some DOHC heads.

 

Come again?

 

the VG motor was available with DOHC
ala' 300 Z
So why not swap em on'

 

which Z would that be? and what else would you need to change to make them work?

 

90-96.
Don't know never tried but should be doable with a little creativity and logic

 

sweet,

maybe ill make a trip to the junk yard to find some parts

 

matt - i'm not buying a path engine...

internetautomar - if i wanted to get the dohc...i would just get a ve.

i'm getting the vg for free so i'm going to work on that engine and change/add what i can.

thanks for the suggestions guys. keep em comin'

 

Surely you know how wide those heads are?!? They is no way they will fit, not to mention coolant passages, timing issues, head bolts... blah blah blah

 

and also 2 tubs of JB weld, a propane torch, can of pork and beans and a few rubber bands...

 

ok,
who's house we doing this at... im all ready if some one can bring the beans.

 

And a bigass CNC mill because the heads and bolt holes don't even line up between both engines.
VG30E block != VG30DE block.

 

how far off are the 2 engines?

 

Forget about it. Simple as that.

 

far enough that you can't mate the two and get something running.

like dogs and cats. their shape is the same, reproductive parts are in the same locations, they mate the same way, but if you stick them together, you'll never have anything come of it.

 

yeah i thought about the vg30de engine as well. something like 210hp at the crank if i remember correctly. but they're known for flooding all the time.

here's a thought...
how about just rebuilding the engine stock with port and polish but a larger injector maybe from the vg30et accompanied by the fuel pump, lines & rails. worth it? prob not...

keep shooting out the ideas people. it's really appreciated.

 

dont forget cams and also you should consider getting the vg33 bottom end. you will spend alot more in the long run getting the machining done to get the 3.3 pistons to work than proboly the 300 to 600 for a used 3.3 block plus i dont think you will get 3.3 with just the pistons i think the crank and rods are also different so oyu will proboly only get 3.1 or maybe 3.2 out of it not worth the time either way you will spend more dollars on biulding NA than you would for a custom turbo and you will get alot more power and ease of growth

 

I got a 3.3 in my QX4, why don't you just pay it off for me and you can have the engine out of the thing.

 

what are you going to put in it?

 

you sure nothing will come out... ..
heck two happy animals.. ok i am offically bored .

as for the maf problem , tyr unplugging it from the wiring harness, and rev the max.. if it dies out like above 2000 rpms then it not the maf..

 

I am going to roll it into the Columbia and get the insurance money so I can buy one with a 3.5.

BTW, turn your AIM on

 

Or how bout you port and polish, bore out the cylinders and BOOST it

 

punch out the cylinders .5over

 

okay....
i'm getting the engine for free right. lets say i set myself a $1000 budget to complete the rebuild and add some extras.
custom turbo is out of the question mainly because i don't have the experience or patience to setup the engine management for that.
i can get lots of parts from older nissan engines w/o spending too much. there's a lot of japanese importers in my area so i don't have anything to worry about in regards to getting parts.
jwt cams are like $500 aren't they? too much! especially since ppl say they didn't get much gains from them.
Also ya gotta remember i'm in toronto, so any figures you guys spit out needs to be converted.
I know for a fact that i can't take the lower block for m the 3.3 and bolt it to a vg30. that's why i considered boring the vg30 out to fit in the pathfinder pistons. but these are all just ideas. i do have lots of time to divise a plan.
thanx ppl.

 

um, if you only have $1000 to work with, hang it up! if you have a limited budget than a custom setup is way out of your leauge. if you're limited just throw some cams(there are WAAAAY more available cams than just JWT) in the VG30E, P/P or match the heads and intake and call it a day if all you have is $1000 to spend. the 3.3 swap isn't as easy as what you think, sufermax(??) did it and its not entirely plug and play.

 

okay.
so what other options for cams do i have? i've only ever hear of the jwt cams. da max - please enlighten me because this is news to me. are you talking about cams made for the vg30et that can be used on our engines? or are they cams directly made for the vg30e like the jwt ones?
i'm setting the $1000 as a guideline. if it's gonna cost me a few hundred more that's not a big deal.
yeah.... i know the 3.3 piston swap would be far from easy. but i just want to try something new or something that is rare since i'm gonna have the opportunity to rebuild the vg.
i love the car and i plan to keep it for a very long time so i want to seperate myself from the common engine mods to a 3rd gen.
vg30et is out of the question. vg30de is out of the question. vg33e (de?) is also a no. but i'm just hoping that i can take parts from other vg engines to hopefully build a better vg30e that has a little more ummphhh to it.

is sufermax (?) still on these boards? i've never seen anything posted from him in the year and a half i've been here.

 

How can you NOT flame?

 

how would i go for a drive with the hood open checking the voltage on the maf wires? or are you suggesting lengthening the wires so that i can monitor the voltage from inside the car?

i feel like such a freakin' nooob. i usually take car of my problems w/o begging for help. but this has got me stumped plus i don't have much time anymore to tinker with the car. PLUS it's getting colder outside.

 

BASTARD! i'm on your turf now!

flame what newayz?