410hp 370z
 

Nissan fielding driving team of only GT Academy winners for Dubai 24 Hours

any idea on the mods??

I think the only mod on this car is a........miata door.

is the power at the wheels or on the crank? I'm going to guess supercharger at the wheels. At the crank. It could be bolt ons, cams, expensive cooling systems and an extensive tune.

I'll hazard a guess. Reworked 350z heads, long tube headers, induction mods, custom engine tune

Depends on the rules for the racing organization.

Cooling mods are a definite, other than that I'd say race exhaust, weight reduction, intake and aggressive tune.

Most likely its 410hp quoted at the crank.

So it's a detuned 5.0. :stirthepot:

Or just a built 3.7L with breathing and cooling mods spinning to 8,000+.

:bowrofl: :bowrofl: :bowrofl:

jet engine

all forjd internals

just sounds like a fully built race motor to me. if you were to do hi comp pistons along with cams and the supporting intake, exhaust and cooling mods. i could see it, especially if they raise the redline a bit. i'd be more interested to see what the torque number is. that's the real power.

lol @ steve :shakes head:

U lol'd

I doubt it makes much torque. They want high RPM power and keep the car geared to stay up in the high revs.

Most race engines are built that way, even the big NASCAR V8s. Only at a few tracks do they actually tune the engines to make some more mid-range torque, but in general they are putting out 950hp and maybe 400lb-ft, if that.

:iagree:

Why couldn't they get 500whp? clearly they need that guy from our forum who was going to build the 500whp NA motor to pitch in on building a real race car.

It might not even be a 3.7 at all.

lol^

I'll hazard one, too. Detuned VG30DETT? I have no idea of engine specs in the class, so I'm talking right out my ***.

its probably a GTM TT with a bored/stroked 4.5l VQ :rolleyes:

It would be cool if they had actually FI'd the VQ37 for this car, and did it was setup that was reliable enough to be tracked. i doubt it though.

The GT-R will be competing in GT3, while the two 370Z's will be competing in GT4. The Juke-R prototype is supposed to be the pace car!

I think running in GT4 they would have to run the stock engine size. For the GT3 GT-R I think they ditched the TT in favor of a RWD V8. Could be wrong though.

pretty sure that is correct. i think the FIA R35 race car was/is a nicely built 500ish hp VK56 and RWD.

Is a GT4-spec build ... 2010 cars were prepared by RJN Motorsports in the UK - not clear whether these are the same, but RJN facilitated the PlayStation marketing exercise in 2010, so likely to still be them.

Engine specs are steel crank (suspect but don;t know whether it was sourced from Cosworth), based on VQ35 block with Steel (Carillo?) rods and bespoke forged pistons. Using ported VQ30 heads with enlarged valves and runing 13.5 to 13.8:1 compression on FIA 106-octane (RON, not MON) fuel (same as F1 fuel), engine delivers ~400hp at 7500rpm.

RJN buitl a GT3 version of the 350Z in 2007/8 and simply put the engine into the new 370Z shell for 2009 season when the 370Z was announced. They may have upgraded to VQ37 block by now but nothing in the public domain suggests this has been the case.

Engines originally built by Graeme dal Smith who used to own IES Engineering in the UK, but he sold out of that several years ago. He has Nissan motorpsorts knowledge going back to the 1990's

NISMO Japan link for mods items is here:

NISMO | VQ35DE Engine Parts

The trick to getting hi-power is hi-compression which means you need trick (F1 type) fuels.

RB

yea thinking about it now, it would actually surprise me if they used a VQ37VHR motor to do a race car build. the VVEL system really adds a lot of heat to the oil. it would almost be counter productive compared to the oil cooling system needed for a straight up race car. i guess it could be done but it makes sense to use the simpler motor if it makes the power needed more reliably (in theory)

probably something similar to this:

Nissan VQ35 Short Block (3 - 5L) - Nissan Engine Assemblies - Cosworth USA

but like you said, with much higher 13-14:1 compression

Your are correct re VVEL ... that's why a VQ37 block/crank/rods with the VQ30 heads is a good idea as these heads don't have VVEL, but the earlier style varable valve timing only. Details are on the NISMO JP website. They even offer cams actuators with more aggressive ramp angles to increase the valve overlap.

what channel will this be on?

From what I read there won't be a live broadcast but they will instead produce a highlight show. The show won't air until Feburary, and not sure what channel. Possibly ESPN unless they sell it to Speed.

Nice detective work. I've been trying to get an answer out of Nissan for a week.

Found the official entry list. Yes, the two 370Z's are being fielded by RJN of the UK. No engine specs but they list their displacement as 3.8L, so they may either be running the GT-R block or a custom crank shaft.

The 1 GT-R entry is by JRM, also out of the UK. Displacement is listed as 3.8L as well so this looks like a traditional turbo set up.

24H Dubai - Provisional Entry list 24H DUBAI 2012 : endurance racing for touring cars, GT cars and 24H Specials by 24H Series

Interesting. I doubt it would be from increasing bore since I doubt there's much left between the cylinders. You guys should work for Scotland Yard.

Only 3 drivers in car #2. Wow.

Yeah the GT-R block has the same bore, just different slightly different stroke. There really isn't much room for bore expansion as you've pointed out, the VQ37 is only 2.5mm wider bore than the VQ30.

It is provisional, so theoretically they could add a driver. The cars are locked in however.

could be the Z33 380rs crankshaft since that was pretty much made for racing as it was with the traditional 95.5mm bore and enough stroke for 3.8L. it made 350hp @ 7200rpm in race trim (assuming race gas) so it could theoretically get close to 400 if reved up and over 8k rpm without loosing much torque

According to Graeme dal Smith, they are now running 370Z stroke crank (86mm) courtesy of Cosworth and 96.0mm bore to give 3.73 litres. With the VQ30 heads they get 13.2:1 compression. This is all based on the NISMO 380RS Type C Z33 race car specs - just installed in Z34 chassis.

do i hear an echo? lol

Doesnt surprise me. Most all race cars are running older technology top ends from other VQ series motors. The heads in VQ37 are a problem from what I hear. They generate too much heat at racing RPM levels.

it's not the heads themselves, it's the VVEL system. that's why the GTR doesn't have it... yet

The Dubai race is TOMORROW. check your local listings, of which in the USA there are probably none. :ugh2: after all there might be a story on next years NASCAR series to air on SpeedChannel :icon14:

don't hate, big news in nascar this year... they are going to fuel injection and ditching carbs :rolleyes:

Did I say tomorrow? It's tomorrow in Dubai!

24H Series Live - : endurance racing for touring cars, GT cars and 24H Specials by 24H Series

370Z currently 4th-in-class in qualifying. Seems there is a "slight problem with the brakes". LOL.