I just had a brain storm while reading the JGTC site....

[VQuick]

Originally Posted by Hodo

I have a new long term NA engine swap goal for my Z32......

Thanks to the Japanese Racers in that GT 500 class, I see that there is a All aluminum VQ30DE, and DETT out there, I am tring to find weight specs on it now... but its a slow process.

The weight on a VQ is probably around 500lbs, give or take a few. This is just a guess from me, taking into consideration that the VH-series V8 is supposed to be 521lbs. So, swapping a VQ in should make for a nice weight savings.

I found power specs from a Nissan sight, and its claimed to be around 222HP and 217ft Torq....

Those figures are for the VQ30DEK(K for 'kaizen, or 'improved'). As far as I know, we only saw it used in the '00-01 Maxima. The previous VQ30DE had 190hp/205lb-ft. In the US at least, the early VQs had front drive applications only. For you, a swap would require relocating the starter and finding a rwd tranny(according to the guys at Freshalloy). You should be able to get by with an '01-04 VQ35 Pathfinder tranny. If you want better ratios, you can spend more for a G35 or 350Z tranny.

The VQ30DE likes to rev, too. Even with my short-shifting automatic tranny, my VQ30DE Maxima will rev to 6500-6700rpm before upshifting. JWT has a nice program to raise the rev limiter to the 8k range, I think. They also have some pretty mild cams, which still provide a good 15-20hp. It should make for a nice sport NA application.

Well its about the same as a stock VG30DE but the VQ30DET is a big difference..... 280HP 285lb/ft.

The cool thing is, the VQ30DET is probably making close to 300hp, if not more. You see, the VQ25DET is also rated at the magic '280ps' maximum. Who knows, it could be making more than that. It stands to reason that the 3L version is making quite a bit more power.

If I could shave 100lbs out of the front of the Z32 I can make it a almost 50/50 weight balance.

I'm not sure how much the VG weighs. You might be able to save even more than that.

[ZedEx]

I love you VQuick, haha.

Welp... I was right, 190bhp

-Wes

[Hodo]

190HP before I rebuild it MY WAY.

I would just get the short block version and rebuild it from the crank up. That way I am sure of everything it can do.... then I just got to get some engine dyno time to tune it at one of the race shops around here.

[VQuick]

Originally Posted by Hodo

190HP before I rebuild it MY WAY.

Actually, both of you guys were right. Two different VQ models. The DEK had micropolished internals for less friction and a variable intake manifold(VI). You lose a bit of low end with the VI, but you have much better top end power.

I would just get the short block version and rebuild it from the crank up.

Well, if you want to be like that, there's some hybrids you can build.

VQ30DE Bore x stroke (mm): 93 x 73.3
VQ35DE Bore & stroke (mm) 95.5 x 81.4

There's also the new VQ40 from the '05 Frontier/Pathfinder/XTerra.
VQ40DE Bore & stroke (mm) 95.5 x 92 With a compression ratio of only 9.7, you know there's some potential to be found.

So in theory...
VQ30DE block + VQ35DE crank and rods = VQ33DE stroker(93 x 81.4)
VQ35DE block + VQ30DE crank and rods = VQ32DE big bore(95.5 x 73.3)
VQ30DE block + VQ40DE crank and rods = VQ38DE stroker(93 x 92, still not square after all that added stroke! )

[freakonaleash1187]

cars are so awesome, you can do so many things with them. i like the idea of a VQ30DET, imagine that, going up to z32 guys and saying you have a VQ30DET, and they would go "the Q is supposed to be a G and there are supposed to be two T's", and you just tell them nope, it really is a VQ30DET, ahh the look on their faces. but me personally, i would just go with a VG30DETT.

-Jared

[Zgringo]

[quote=VQuick]There's also the new VQ40 from the '05 Frontier/Pathfinder/XTerra.
VQ40DE Bore & stroke (mm) 95.5 x 92 With a compression ratio of only 9.7, you know there's some potential to be found.

Thank you Mr. VQuick. I like your thinking and your knowledge base. The Zed32 is a natural for a more modern and upgraded engine swap. Two very good swaps would be a VQ40DE or VH or VK45DE engine which would lower the weight of the car by 100 lbs. I haven't tried the VQ40 swap, but I do know the VH45DE swap as I'm just about finished with mine. The VH45DE bolts up to the Z32 transmission and makes the swap easy. Because of the added legth of the VH45DE engine I moved the transmission back 4 1/2" and it wasn't a problem. Had the driveshaft shortened 4 1/2", built the motor mounts installed a 4 core rad. Stock would be in the same HP range as a TT but it's NA. My engine isn't stock and well have much more power than a streetable VG30DETT engine could ever dream of, and I'm sure with that statement I'm going to recieve lots of flak, but it's true and fact.

[gixxer 2 cobra]

I have read that most of the vg motors use a lot of the same parts. Apparently someone used a vg33e block in a vg30dett engine. I understand that the crank was destroyed under boost(they used the vg33e crank) but If indeed that is a possible combination, why not use the twin turbo crank and make the engine work that way? The stroke is the same length, only the bore is larger. I think with a strong crank made for boost, this would be a great combination. The block is iron, and can be bored a bit, but should be strong enough to use turbos like the origional z32tt did. This would be benefitial in so many ways: use bigger turbos, spool turbos faster and more efficently, make more power using less boost resulting in less engine stress and wear, ect. Apparently it is complicated or we would be reading more about this idea but it sure sounds like a great idea to me. What do you guys think?

[Broke_as_****]

Originally Posted by gixxer 2 cobra

I have read that most of the vg motors use a lot of the same parts. Apparently someone used a vg33e block in a vg30dett engine. I understand that the crank was destroyed under boost(they used the vg33e crank) but If indeed that is a possible combination, why not use the twin turbo crank and make the engine work that way? The stroke is the same length, only the bore is larger. I think with a strong crank made for boost, this would be a great combination. The block is iron, and can be bored a bit, but should be strong enough to use turbos like the origional z32tt did. This would be benefitial in so many ways: use bigger turbos, spool turbos faster and more efficently, make more power using less boost resulting in less engine stress and wear, ect. Apparently it is complicated or we would be reading more about this idea but it sure sounds like a great idea to me. What do you guys think?

As for the exact details of using a VG33 block with a TT crank/rods, I'm not too sure on that. I don't see why it wouldn't be pretty easy, they are the same block. The swap would probably involve moving most of the sensors to fit the 300ZX. However, with the VG33s stock 91.5mm bore you might get into some issues with increasingly thin cylinder walls, and therein limit the amount of boost you could run. Since the idea of anyone going this far is to run as much boost as possible, you might be shooting yourself in the foot. And most likely you would either have to run the stock cast VG33 pistons, again limiting boost, or have a custom set machined at big cost. Most people just use the TT block overbored for aftermarket pistons. You can get up to 90mm pistons off the shelf which bumps the displacement from 2960cc to 3166cc, not quite 3300 but enough of a bump to make some difference.

That and as a general rule of thumb, if the thread you are reading is not on the first page of the forum, it's usually considered too old to post on. If the topic warrants further conversation, make a new thread about it and put a link to the old thread in your first post.

[k3smostwanted]

yes, please start a new thread instead of posting in one from long ago. if you would like to further discuss a VG33DER swap. please start a new thread and i am sure everyone will put in their 2 cents. thank you gixxer...

thread closed