410hp 370z

m4a1mustang · 12-20-2011, 02:56 PM

Quote:

Originally Posted by HKYStormFront

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

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.

Jeffblue · 12-20-2011, 02:57 PM

Quote:

Originally Posted by m4a1mustang

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

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.

m4a1mustang · 12-20-2011, 02:58 PM

It might not even be a 3.7 at all.

Jeffblue · 12-20-2011, 03:00 PM

Quote:

Originally Posted by m4a1mustang

It might not even be a 3.7 at all.

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

HKYStormFront · 12-20-2011, 02:58 PM

lol^

BGTV8 · 12-20-2011, 09:00 PM

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

370Zsteve · 12-21-2011, 01:25 PM

Quote:

Originally Posted by BGTV8

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

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

ChrisSlicks · 12-21-2011, 01:44 PM

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

370Zsteve · 12-21-2011, 01:48 PM

Quote:

Originally Posted by ChrisSlicks

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.

370Zsteve · 12-21-2011, 01:58 PM

Only 3 drivers in car #2. Wow.

HKYStormFront · 12-21-2011, 10:47 PM

Quote:

Originally Posted by ChrisSlicks

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

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

BGTV8 · 12-28-2011, 09:55 PM

Quote:

Originally Posted by ChrisSlicks

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

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.

Shamu · 12-29-2011, 01:45 PM

Quote:

Originally Posted by BGTV8

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.

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.

HKYStormFront · 12-20-2011, 09:06 PM

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)

BGTV8 · 12-20-2011, 10:25 PM

Quote:

Originally Posted by HKYStormFront

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)

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.

12-20-2011, 02:58 PM	#3 (permalink)
m4a1mustang A True Z Fanatic Join Date: Feb 2009 Location: Northern VA Posts: 55,385 Drives: on two wheels Rep Power: 6963	It might not even be a 3.7 at all. __________________ - Steve Zs & Coffee - Saturdays at 10AM in Fairfax, VA and Columbia, MD (Click the banner!) LIKE us on Facebook!

12-20-2011, 02:58 PM	#5 (permalink)
HKYStormFront A True Z Fanatic Join Date: Apr 2009 Location: Greer, SC Posts: 14,954 Drives: 06 Frontier SE 6spd Rep Power: 53	lol^ __________________ Patrick // 06 Frontier 6spd Nismosis // Mods: Uprev Tuned @ Z1 Motorsports: 257whp & 292 ft lbs 09 Pontiac G8 GXP // M6 // Sunroof // Tint... For now

12-21-2011, 01:44 PM	#8 (permalink)
ChrisSlicks A True Z Fanatic Join Date: Mar 2009 Location: North East Posts: 6,203 Drives: 09 370Z Sport M6 Rep Power: 654	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 __________________ Hotchkis ARB \| Stillen CAI \| Art Pipes \| Berk CBE \| Stillen AP Racing Brakes \| AE Performance Oil Cooler \| BC Racing ER Coilovers \| Doran Control Arms

12-21-2011, 01:58 PM	#10 (permalink)
370Zsteve A True Z Fanatic Join Date: Sep 2009 Location: Gold Coast CT Posts: 10,599 Drives: 2019 Corvette G.S. Rep Power: 43	Only 3 drivers in car #2. Wow. __________________ SOLD MY Z MARCH 2018 - another Core OG moves on - new ride 2019 Z Corvette Grand Sport - no mods necessary but already have eyes on HFC and intakes LOL IT NEVER ENDS.

12-20-2011, 09:06 PM	#14 (permalink)
HKYStormFront A True Z Fanatic Join Date: Apr 2009 Location: Greer, SC Posts: 14,954 Drives: 06 Frontier SE 6spd Rep Power: 53	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) __________________ Patrick // 06 Frontier 6spd Nismosis // Mods: Uprev Tuned @ Z1 Motorsports: 257whp & 292 ft lbs 09 Pontiac G8 GXP // M6 // Sunroof // Tint... For now

12-20-2011, 09:00 PM	#6 (permalink)
BGTV8 A True Z Fanatic Join Date: Dec 2009 Location: 03350 Australia Posts: 1,516 Drives: 09 Nissan 370Z M6 Rep Power: 39974	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