V6 Vs I6

[markdem]

just curious which engine people prefer. each one has its pro's and con's; V6 is more compact, I6 has better harmonics yadda yadda yadda. now im not saying that i know more about engines than those clever people at nissan, but perhaps if we got enough votes for the inline engine then nissan would consider making the good old RB again?

[iseekool]

just curious which engine people prefer. each one has its pro's and con's; V6 is more compact, I6 has better harmonics yadda yadda yadda. now im not saying that i know more about engines than those clever people at nissan, but perhaps if we got enough votes for the inline engine then nissan would consider making the good old RB again?

I don't think Nissan would remake the RB ever again. It will never meet emissions. The trend now is all alloy and larger displacement engines - reason being is for balance, cost and emissions - something to do with thermo dynamics.....

The RB is from the mid 80s.

however... It would be interesting if Nissan does sell its patents for the RB to 3rd manufacturers for developing countries....

[rs73]

agreed

cars these daysr gettin0g bigger/heavier with clever electronic

v engine allows bigger capacity in more compact package to allow more space in engine bay to fit other stuff while allowing better placement for weight distribution

with nissan's future vision dun think they'll go back to inline6.

even bmw uses v config in their current M3 now...

[Tricky-Ricky]

The VQ engine design dates back to 1994, so hardly more refined emission's wise, and nearly any engine can be made emission friendly, personally i think the RB engine feels a lot more refined.

Its kind of annoying that Nissan had to throw the cooking version of the v engine into the 350Z and 350GT rather than develop it a little more like the VR/HR engines, having come back to Nissan from Toyota, i must admit to being rather disappointed, i had a Supra and for a 17 year old design and manufacture, the quality and build just takes the piss from Nissan.

[scotty nm35]

Perhaps you need to try all the VQ variants out, VQ25det is the pick imo, in stock form at least.

They are all strangled by electronics and open up with a tune but they will respond beautifully to forced induction. I have an unopened VQ25det in my Stagea running 260ish awkw with no issues. Torque is up around 650nm so it gets the barge going quite well.

Emission's wise, its better than a prius as I have been running E85 for months.

[Messiah]

My personal pref is an I6, v's always seem to have this slight vibration that irks me whenever i notice it (which is not all the time).

Really it was 6 of one 1/2 dozen of the other, so i'm using this small irk to pick one.

[chad bob]

I'm going to have to pick V6 as well, it's geting very hard for manufacturers to get I6 powered cars through frontal impact standards these days as they have the nasty habit of entering the passenger compartment.... like a battering ram, where as the VQ motors have an 'engine drop' function in case of a frontal impact, it effectively ejects the motor out the bottom.

If we're still lusting after an updated RB series then I wouldn't count on it, the RB is an old fashioned motor, it makes good power because it was built like a brick dunny, so could withstand monumental amounts of boost pressure. More boost, more fuel more power. As a result the motor weighed more than a small block chev and was thirsty as hell even in NA form.

Modern engines have to use a lot more finesse and technology to achieve power, combustion chambers these days are much more efficient, so you get more bang for less fuel. The VQ35 for example weighs as much as a 2L 4 banger from the 80's but makes 230Kw in HR form.

V6 is the future I'm affraid.

[NISMO]

With the technology currently in the VQ motors, i have no idea why you would ever want to go back to something so ancient as the RB. (in comparison)

Nissan's current V series motors are amongst the best in the world.

Exhibit a

VQ37VHR

A rocker arm and two types of links open the intake-valves by transferring the rotational movement of a drive shaft with an eccentric cam to the output cam. The movement of the output cam is varied by rotating the control shaft within the DC motor and changing the fulcrums of the links. This makes a continuous adjustment of the valve lift amount possible. C-VTC and VVEL together control the valve phases and its valve events, allowing free-control of the valve timing and lift. This results in more efficient airflow to the cylinder, significantly improved responsiveness, optimizing the balance between power and environmental performance.

Yes the RB is a great motor , and will always be special amongst many motoring fans, Nissan fans or not, but in my opinion the newer range of V motors win hands down.

I think if emition laws weren't so strict and Nissan could freely strap a couple of, or a single turbo to the VQ's, then I'd guess that most of us would be saying RB-What?

[ARTZ]

agreed

cars these daysr gettin0g bigger/heavier with clever electronic

v engine allows bigger capacity in more compact package to allow more space in engine bay to fit other stuff while allowing better placement for weight distribution

with nissan's future vision dun think they'll go back to inline6.

even bmw uses v config in their current M3 now...

Yeah but thats a V8 right...Whole different ballpark there...

[scotty nm35]

I think if emition laws weren't so strict and Nissan could freely strap a couple of, or a single turbo to the VQ's, then I'd guess that most of us would be saying RB-What?

VQ25det

VQ30det

Both great engines with no aftermarket support.

What gearbox would handle the sort of power a vq37vhr twin turbo would put out though? 20psi on the stock motor running E85 would be interesting to say the least.

[bigmikespec]

I don't think Nissan would remake the RB ever again. It will never meet emissions. The trend now is all alloy and larger displacement engines - reason being is for balance, cost and emissions - something to do with thermo dynamics.....

I hope you mean a V6 is better in terms of weight balance in a car and not balance as in mechanically. Mechanically it is shit in comparison to an I6, the I6 is arguably the best configuration in terms of dynamic balance of rotating components. Interesting to note that Fords I6 4.0L is being updated to meet new emission laws (last I heard).