Help On Engine Work Please

[TDTCE86z31]

Heys guys im new to this Forum and as unexpirienced as i am i need you guys help.

The first Thing i need to get out of the way is, I have a 86' 300zx and i been working on it for a while, the previous owner fried the head and injectors and the engine had to be replaced, due to the low Availavility of parts at the cars locaton (Dominican Republic) They settled to put in a VG30i off a pathfinder. The car runs really well and i been told that the inetrnals are basically the same as in the rest of the vg30's. and i was wondering since the block is also known to handle amounts of boost and nitrous, if i couold run it on nitrous? Im asking becuase i was told i would need a different chamber shape to do this, is this true?

I also wanted to ask you guys if you knew anywhere i can get parts for head work - Pistons, Valves, cams. And if the vg30i's internal parts are interchangeable with the vg30e. because its not as easy specifing needed parts for a vg30i its rather easy getting results by looking for vg30e parts since its way more popular. also if you guys know where i can get these engine internals for performance purposes, if not OEM. I have little knowledge of this and i im totally blank with this issue, i basically can't find many parts for the engine and i need to get things together as soon as possible to ship it away.

as for the nitrous topic, i have the fuel system 50% done all i need is a performance fuel pump as im running the engine on a 4 barrel edelbrock carb (which is a long story) i will upgrade the colling system, exhaust, intake with an additional opening for an air intake, i have these things kind of figured out im just really troubled by how difficult it is to get much info on my engine.

Thanks for reading and anything would be helful, please don't think twice to post, as i am in a huge need of help on this.

[Heavy]

from what im reading the VG30i is basically the same thing as a VG30e except it was only found in pathfinders and D-series hardbodys for a short number of years. The FI "fuel injection" setup is different "Multiport vs Throttle-body" other than that everything else is the same, heres some more info..

VG30i
horsepower=145@4800 RPM
torque=166@2800 RPM

VG30E
horsepower=153@4800 RPM
torque=180@4000 RPM

as for modications.... i havent really come across anything worth mentioning, just keep looking. hope this info helps!

also, I think we need to heart the story behind your reason to put a 4-barrel carb on...

[TDTCE86z31]

from what im reading the VG30i is basically the same thing as a VG30e except it was only found in pathfinders and D-series hardbodys for a short number of years. The FI "fuel injection" setup is different "Multiport vs Throttle-body" other than that everything else is the same, heres some more info..

VG30i
horsepower=145@4800 RPM
torque=166@2800 RPM

VG30E
horsepower=153@4800 RPM
torque=180@4000 RPM

as for modications.... i havent really come across anything worth mentioning, just keep looking. hope this info helps!

also, I think we need to heart the story behind your reason to put a 4-barrel carb on...

Thanks for replying, anything helps at this time, good to hear the vg30i isn't too far from the vg30e's specs since wikipedia has it listed at around 130-138 horsepower.

Well first this car is in the Dominican Republic, The previous owner seemed to have too much fun in it without routinely checking the cars Temp levels, looking for defects ect.... And in a result of this he fried the head along with the injectors (btw it was originally a 1986 300zx non turbo). In D.R it gets really hard to find parts, And very common to work on carbs rather EFI not that they don't know how, But being also you can run from city to city looking for a certain part and come out empty handed. So after the guy blew the head they ended up replacing the car with a vg30i off a pathfinder and I though this whole time it was a vg30e being the 300zx non turbo and 90-95 pathfinder share the same engine. But I overlooked the possibility of it resulting to be running on a different type of pathfinder motor (I guess since I was pleased with the specs) I didn't bother to keep checking until now when someone saw a pic of the engine and asked me if I was sure it wasn't a vg30i since it looked way more like vg30i and, The vg30i was easier to be adapted to run on a carb. After some research I came to a conclusion it was a vg30i being even when I searched for its images they were extremely identical. Well the previous owner replaced the engine with a vg30i and couldn't get his hand on a EFI system or prefered a carb I guess. So it was the previous owner to replce the engine and adapt the engine to a 2 barrel carb. I am more familiar with carbs, since motorcycle and scooter tuning is basically cultural overthere and I am a big fan of edelbrock carbs. I decided to get it a 4 barrel edelbrock carb. And there you have it. What makes me working on it so much harder is I have to ship parts overthere so it takes weeks/months to gather up parts and get boxes and start shipping and shipping fees go about 100 dollars a box sometimes over.

Surprisingly the motor runs very well and the 2 barrel carb it's running on is like half dead, it's in terrible condition. This is why I expect it to run much better on a new 4 barrel edelbrock carb, The carb is already overthere and I plan to have it installed in a few weeks when I get other thing out of the way. This is also why I was planning to go nitrous since the block is known to take a good amount of boost or nitrous. And since I didnt know how stress the Head might be this is why I wanted to know where I can get performance parts for it or OEM parts for it. Because before I get the fuel system fixed up, exhaust - exhaust manifold ect. I wanted to fix up the head with newer parts hoping for it to take the nitrous better and help out my performance overall without nitrous, Since basically the engine has been running on stock internals since 1986-1989 with most likely poor maintenance.

[Heavy]

http://www.courtesyparts.com/300zx-part ... -2317.html

all oem parts with diagrams

[TDTCE86z31]

http://www.courtesyparts.com/300zx-part ... -2317.html

all oem parts with diagrams

Thanks Alot! I know for sure i wouldn't have found that website. Its awesome the internals are interchangeable, if not i would have been in deep trouble. Thanks again!

[AZhitman]

Nice work, Heavy.

I'd imagine the challenges of maintaining a car in the DR would be similar to those faced in Cuba (although not as bad).

[TDTCE86z31]

Nice work, Heavy.

I'd imagine the challenges of maintaining a car in the DR would be similar to those faced in Cuba (although not as bad).

Yes shipping and part availability is difficult, I dont know about Cuba but it must be silimar to D.R since its in the Caribbeans. Mechanical skills in D.R are really limited at times, And the few mechanics that once lived here in the U.S and know there stuff are the type of mechanics you have to chase after and it can become frustrating.

[AZhitman]

Put together a list of the parts you need (and from what car) and I'll distribute it to some people I know.

[TDTCE86z31]

Put together a list of the parts you need (and from what car) and I'll distribute it to some people I know.

I can't really afford anything now, lol. But for now i have to buy parts one at a time. The car is running well, i was considering swaping up all the heads internals because i plan to go nitrous and wanted the engine to resist it. But right now all i need is a radiator, and the rear brakes (discs, calipers,) The rest isnt really considered a necesity, lol...

But Thanks alot and i appreciate your help!
One thing i might need if the one currently installed doesn't function is the digital cluster, if it doesn't work and i can't get one locally i will let you know. Thank you very much for your help.

[AZhitman]

Sure thing.

A good friend here locally does a lot of dismantling and restoration of Z's, and he ships some of his completed cars to the Middle East.