RB25 vs VG30DETT

[Swedish Mike]

Maybe wrong forum but more action here.

What would you pick and why? I got something against V-engines, don´t know why but I just like I-engines better...The problem is that RB25 is rare and I can get cheap VG30DETT everywhere.

I´ve just heard a lot of bad things about the VG, bad gaskets, bad heads and so on, what do you think, is the RB25 a better engine?

We talk at least turbo upgrade on both.

/Mike

[lucky7]

VG is ALOT more expensive to upgrade turbos. theres 2 of everything. 2intakes, 2TB's, 2turbos, 2wastegates (afaik), 2bov's, 2mainifolds, 2DP's, 2exhausts, 2cats (maybe 4), etc.

my buddy has a 91 TTZ. its a great car, despite being a big fat pig. but its uber expensive to mod if you are on a budget. thats a big reason i dont have a Z32. but in stock form, the VG will last a long time if properly maintained.....like anything else will. g'luck.

[Swedish Mike]

VG is ALOT more expensive to upgrade turbos. theres 2 of everything. 2intakes, 2TB's, 2turbos, 2wastegates (afaik), 2bov's, 2mainifolds, 2DP's, 2exhausts, 2cats (maybe 4), etc.

my buddy has a 91 TTZ. its a great car, despite being a big fat pig. but its uber expensive to mod if you are on a budget. thats a big reason i dont have a Z32. but in stock form, the VG will last a long time if properly maintained.....like anything else will. g'luck.

That´s actually a good point, I thought about the quality of the engine but this is also very important.

/Mike

[lucky7]

once you start to mod it a bit more, you need to split the intake and run two MAFS i believe. they are most deff not a cheap motor to build.

i think that is partly what makes I6's very appealing to people.

[DriftingisLame]

I'm really not impressed with the VG30. On top of the fact that its HUGE, and very heavy, I've never seen them make any sort of decent numbers without thousands upon thousands in upgrades.

Basically if I had a 300zx I'd go LS1.

[Swedish Mike]

I'm really not impressed with the VG30. On top of the fact that its HUGE, and very heavy, I've never seen them make any sort of decent numbers without thousands upon thousands in upgrades.

Basically if I had a 300zx I'd go LS1.

Good point, heavy too.

Thanks guys, just what I needed. Don´t know why I get these crazy thoughts?

/Mike

[gawdzilla]

vg30s are hard to wrench on... dunno about in an S chassis but i'm pretty sure you need to pull the motor to change the turbos on the z32

[Kansei240sx]

Wow..... the lack of information on the VG motor and what it can do astounds me....

Its not as heavy as you think.

There are fully built VG's around 1500+rhwp and they've pushed the VG30DETT into the 10's on STOCK turbos.

No one has respect for one of the best built and sturdy motors nissan ever built. The VG30ET has shown 1000 hp on the factory head gaskets.

Here is a recent arguement between Supras and 300zx's.

Quote »Wow some VERY ignorant posts on here, and not JUST yours evoandy. First off there are NO 2000+RWHP 2JZs, sorry but its not happening nor will it happen. Both engines push 3 liters, the displacement is generally the main attribute to the potential of an engine once FULLY built. A 3 liter can NOT flow more then a 4.0, it just isnt physically possible. Fully built there are VGs making around 1500RWHP+, just like the 2J. Neither engine will be able to make "much" more power then that as you would need to start increasing displacement. Yes I know there are stroker kits for the 2J, but the VGs are also around 3.3L when making that kind of power. And the VG comes with a forged crank,forged rods, crank girdle, and a closed deck block. All of which are designed for high compression engines(or boost, which is the same thing.). The only thing the VG did not come with is forged pistons, though they are not forged they are still stronger then alot of forged pistons in other vehicles, 650RWHP can be seen on the fully stock engine. Also as far as I know there has NEVER been a Supra to break 1000RWHP on the stock internals, if I remember right most people agree its limits are around 950RWHP while most do a rebuild around 6-700RWHP with a few pushing the envelope at 800+RWHP. Also the differential is a weaker one then Nissan designed for the Z32, the R230 diff is the strongest Nissan has ever built and still WORLD CLASS. The stock 5 speed in the Z32 has seen over 800RWHP (several times), while true the getrag transmission in the supra can see that and more power which is VERY impressive, 95% of the supras making that power switch to fully built autos,powerglides, or other automatics of that sort. Also both V and inline engines have differenet advantages, once fully built neither can produce more power then the latter if displacement and volumetric efficiency levels are equal. A V designed engine allows for a lower and more center placement of the engine in the body for a much better handling vehicle. It also allows for a shorter and more durable designed crank shaft. blah blah blah I can go on for ever but in reality both have there advantages, but no one can argue that a supra is even relativly a good buy at 20K+ for a 15 year old car.__________________[/quote]

[lucky7]

ay man, all i said is that it is expensive to mod. haha. a guy by me named Chin has the most powerful, non nitroused Z32 in the country. well, rumor has it anyways. its up for sale too!

ahhaha, found it. he ran a 10.56 @ 143mph. LMAO!

here you go:http://www.xceedspeed.com/foru...300zx

trust me, i wouldnt dog the engine. just the price for mods.

[Kansei240sx]

vg30s are hard to wrench on... dunno about in an S chassis but i'm pretty sure you need to pull the motor to change the turbos on the z32

VG30DE/TT's ARE hard to wrench on so are VG30ET's but they're not half as bad once you get the A/C and a bunch of useless **** out of the way. After that they're pretty good to work on.

Some of you might agree, and some of you m ight not, i completely do with this statement but as far as nissans go. You've hardly worked on a nissan till you've worked with a Z.