VR38DETT VS RB26DETT

[Bean]

Originally Posted by StretchGSK

For me there is nothing this side of a Ferrari V8 in say a 360 or 430 that sounds better than a howling RB26!!
Then throw in how nice it is to open the bonnet and actually be able to see the heart of the car instead of just platic covers like in most modern cars...give me the RB anyday!

Not saying the VR is not a great engine, just that I dont feel like I am at all second best. Just the notion that we are comparing a 20 year old design with a new engine speak volumes!

good point about the over engineering gtrlux.....over engineering = less profit

Bean have you actually got a R35 already?

Yeah - had it nearly 6 months now.

[skylinefreak]

I think they should have left the RB to continue the tradition of the skyline.... but then again the VR is a really good motor....

[r34mspec]

Swiss Frank do you actually even like your car?
you actually own one and seem pretty negative about the car on past and present threads?
This is just a question and not an argument!

[tyndago]

There is no replacement for displacement. I have played with many RB26's over the years. The engine sound is beautiful, however it has many other shortcomings. Anyone that tries to say otherwise....well... I have nearly 10 years of dealing with cars now.

The VR38 is a great engine. It can make a lot more power. The VQ which it is "based" on is a good engine. It does not have nearly as good of a sound as an RB, but the torque, the oil pump, the rod bearings probably will make up for it.

[mindlessoath]

yes, i agree with you sean. i guess technology realy cought up. right now we are seeing the engine take 600hp (the vr38) and the trans can keep up with that.

the transmision is the setback on the r35, even with modifications to the tcu and clutchs, but that should help alot.

the engine itself can handle up to 700hp without modifying the bottom end. ya i know the rb26 can handle 1000hp, but im not sure what mods have to be done to achive that. i do know we are going to see vr38's do higher than 700hp if the transmission issues are all fixed with aftermarket support. going to cost alot of money tho, alot for the car and even more money for the parts to battle all the heat and stress of all that power, and then more parts to handle the power around a race track.

anyone remember seeing the esprit z33 chassis with an rb26 engine? that was something amazing! special order for a customer in dubai i belive. they showed it on a best motoring video i think (or something related to the group). it just shows how great the chassis of the R35 (z33) really is... and shows off how great the rb26 engine still is too.

[tyndago]

Originally Posted by mindlessoath

the engine itself can handle up to 700hp without modifying the bottom end. ya i know the rb26 can handle 1000hp, but im not sure what mods have to be done to achive that. i do know we are going to see vr38's do higher than 700hp if the transmission issues are all fixed with aftermarket support.

At 700 there will be issued with the bore lining in the VR38. Taking the lining out and sleeve it like a high power VQ and not a problem. The guy from Xtreme did over 1500 hp on a VQ. The head on the VQ flows better stock, than a worked RB26 head. The VR head will be the same/ around the same.

To make 1000hp on an RB, its a ton of money. Some guys have done it on a 2.6 with a stock crank, but not sure how long they go at that level. They need pistons, rods, most of the times counter cranks. Lots of headwork. Oil pump/dry sump so you don't spit an oil pump every few passes. Do it right and you are 50k+ in the engine and driveline.

[kismetcapitan]

Originally Posted by tyndago

Do it right and you are 50k+ in the engine and driveline.

at least. I've toyed with the idea of building a VQ...but that means starting completely over. besides, who has ever stuck a VQ into a GT-R? It could be done...G35x driveline, AWD was done on a 350Z.

But sleeves are required. On the other hand, with boring and stroking, you can get what, 4 liters? A bit more than that even?

I just added an extended sump to my car. It already has an Accusump. I might add another Accusump set at a different pressure. My bearings have been measured four times before startup, and have been measured again after break in. And I still worry.

[gtrlux]

What you could do Toby is taking a VQ35HR and modifying it to theses specs:

NISMO Type 380RS (2007)

Released as the road version for Japanese market of the Type 380RS-Competition race car , it includes the VQ35HR engine stroked and bored to 3.8-litre, rated 257 kW (350 PS/350 hp) @ 7200 rpm and 397 N·m (40.5 kgf·m/293 lbf·ft) @ 4800 rpm torque. Brembo disc brakes are fitted, as are Bridgestone Potenza RE-01R tires (245/40R18 in front, 275/35R19 in the rear) with RAYS wheels. Front and rear dampers come from Yamaha.

NISMO Type 380RS is priced 5.397 million (5.14 million+tax) yen ($38695 USD).[17] Only 300 cars are produced.[18]

[edit] NISMO Type 380RS-Competition

It is the race car for which NISMO Type 380RS is based. The 3798 cc engine rated 294 kW (400 PS) at 7500 rpm and 421 Nm (43 kgm) at 5200 rpm torque. This in turn is based on the GT 500 race car that Nissan enters into the Super GT championship.

The tuner amuse has a homekit that will push the output from the 350HP VQ35HR to 380HP and 9000rpm redline . . . now ad a twin Turbo kit to that or an Ogura Super Charger !

[tyndago]

Originally Posted by kismetcapitan

at least. I've toyed with the idea of building a VQ...but that means starting completely over. besides, who has ever stuck a VQ into a GT-R? It could be done...G35x driveline, AWD was done on a 350Z.

But sleeves are required. On the other hand, with boring and stroking, you can get what, 4 liters? A bit more than that even?

I just added an extended sump to my car. It already has an Accusump. I might add another Accusump set at a different pressure. My bearings have been measured four times before startup, and have been measured again after break in. And I still worry.

VQ in a GT-R - Top Secret has a NA RWD VQ setup in an R32.

More than 4 liters. 4.15 liters Darton Sleeves and Crower Stroker. BrianCrower.com - Brian Crower - BC - Nissan 350Z / Infiniti G35 - VQ35DE

Everything breaks. There is no replacement for displacement. Apply the same technology to a bigger engine, and it will make more power.

[skyline69_uk]

Originally Posted by tyndago

There is no replacement for displacement. Apply the same technology to a bigger engine, and it will make more power.

That is the fact of the matter - no replacement for displacement - hence the Yanks and their big all alum V8s (which have some of the best power to weight ratios of any engines in the world when tuned correctly, their main drawback is size not weight and the raising of CG because of the size and height).

New production engines are not over-engineered as much now due to new racing rules (power limited for production racing meaning no point) and the added cost and weight of doing it for a production car (the RB is VERY heavy!).

The new R35 engine is great and as it is a V6 design it opens the gate easily for a V8 model of that engine for the future (like the VK V8 from its VQ 6 cyl sister). Engineering wise adding a few CC's by stroking/boring and a few extra cylinders (if designed correctly) is fairly straight forward.
A straight 6 would have ended the game there as a straight 8 just isn't a good way to go and you can only stroke/bore so much.