Ok so im not real sharp on engine schems but one of my friends keeps telling me the vg30 is better than the vq30. is that really true?

 

It's more powerful. It's what came in the 300zx's.

 

depends which one and in which form your talking. I went from a vg30eT to a vq30de, basically, I had a single turbo 300zx and my I30 would spank on my z31 all day long, and not just because it's a 5-speed and my Z was an auto, when I had my Z my mom had a '99 i30 auto and the z definitly couldn't take it off the line or on the highway, I'd say the only vg that's better is the vg30deTT, the twin-turbo Z32 300zx is still; hands down; way faster and more mod freindly than a Z33 350Z/G35

 

but im talking comparisons in blocks, pistons etc. anyone know?

 

There's nothing wrong with the VG30ET, either. It has a crapload of potential.
I don't know what it is you want us to compare about those things, but, IMO, the VQ is a superior engine.

 

The VQ is better in its bare form. Compare the VQ30DE to the NA VG in the 90-96 300ZXs. No chance. The VQ has lighter internals I believe too.

 

well i heard that the lighter internals means the vqs arent as strong. i heard there was somethin about their pistons being much better too

 

VG30DETT ftw.

 

haha ask this on 300zx.com, lol!

 

Vq30dett>Vg30dett; Vq30de>Vg30de

 

tell your friend to find another topic to talk about because your subject could go on for ever. Everyone has a opion. They are both great engines.

 

VQ is better, that's why it's been used since 95, lol

 

Exactly, why would Nissan NOT use the VG (or a variation) if it was better....

 

I'm waiting for some moron to chime in and say "because it costed more to make." Then we kick 'em to the curb and laugh.

 

What a vague post.

First of all he did not list the turbo engine code. Second of all the N/A version SUCKS and is SLOWER than our family sedans.

 

If anyone knows anything about Nissan as a company they were in the RED during the 90's as a whole and in Japanese business tradition did NOT operate as thought they were dying, although they were. Production tolerances remained as tight as ever and production facilities produced at exceptional levels until the doors closed.

How cheap could developing a new family of V6 engines with microfinished internals be? Assuming this R&D took place from '92-'94 they designed and built the engine that is carrying them as a company when they were in some of the worst financial conditions they had ever faced (peaking in 99-01).

 

Not to mention that mother weighs quite a bit more..

 

To be fair the VG30DE preceded the VQ30DE-K by 13 years yet still matches it's HP output of 222 HP. The only reason the n/a Z was slow was because of it's weight, of course.

 

About 100 lbs. more...

 

Point taken.

 

I think the VG30DE was awesome for it's time and if i had to make a choice, i'd take it over the VE as the 2nd best n/a 6-cylinder produced by nissan behind the VQ.

 

Behind the VQ family yes, I would take the strength of the VG for 2nd.

 

I have a crush on the VQ32DET (Tilley's setup) though....

 

Ideal for boost using OEM parts FTW although i'd personally boost a full 3.5.

 

VG30DE in it's defense has a very solid block and internals which shared with the VG30DETT. It has different pistons as well as different cams from the VG30DETT, but, engine only, are pretty identical otherwise. It comes with equal length intake runners as well as dual 60mm throttle bodies. It's draw backs include it's size and weight as well as its high cost.

VQ30DE in its credit has a fairly broad torque curve that is effective even at low rpms. It is of a much more economical design which is has proven itself with rock solid reliability. If I remember correctly, the VQ also uses a serpentine belt in conjunction with a timing chain, where as the VG uses a huge crank pulley with individual accessory belts and a timing belt that need replacement every 60K.

Edit: Cams are same. Heads are different.

 

Even if your friend was telling the truth, it's not like the USDM VG30DE is going to fit in your maxima. You are going to run into some BS trying find a bellhousing to adapt to the VG to a Maxima transmission. Also, the VG is quite wide as it fit quite cozy in the 300zx engine bay.

 

very well put

 

VQ32HRDETT, RWD config. What I would give.. I'm sure as hell not buying the GT-R to get one haha.

 

I would never swap my vq for a vg. i was just wondering what people thought.

 

and howd tilley get a vq32det?

 

Drop compression on a 3.5 and turbo it..

 

why would you wanna drop compression?

 

(sigh..) It's so you can run higher boost with less detonation. It also helps your internals last longer naturally by not going over target compression. Some would say it makes for higher revs as well, though I doubt that's why Tilley did it.

 

Careful with such broad details. You CAN search.

 

sorry im not good with that stuff yet. i understand now. haha thanks

 

Next time I'll make him search then and yeah vagueness is my thing.

 

In this case the car relies on the turbo for the power makes tuning easier to

 

http://www.dune-buggy.com/turbo/enginebasics.htm
If I'm not wrong, his compression is still 9.41, not much down from 10.3 considering the VG30DETT went down to 8.5

 

He didn't have to go down much, the block and internals can only handle so much on these cars so you optimize for the max amount of boost. That, and theres more to it, but I don't feel like getting into it because I'm not an expert in that area.

SEARCH FUNCTION.

 

actually 1 point drop is fairly significant and also the vg30dett was designed to be a turbo motor....so going from 10.3 to 9.4 is quite good.....and to change compression and displacement stroke or bore much change...i THINK in this case it was stroke