Saturday, November 25, 2006 - 09:19 pm, by: Ben Daniel(Lexustt)
Me and a mate are having constant discussions about which is the better engine. Personally being a TT owner and driver I dont have 100% knowledge to back up anything I say so I thought I would ask for a more experienced person to shed some knowledge to pass on to my mate. hes claiming the VH45 has titanium valves stock and people in the US are running 1000hp on a stock motor. I've read and heard from a lot of people and forums that the Lexus V8 is also 1 of the best V8's made for its integrity and reliability and also its response to aftermarket upgrades. All info appreciated, thanks !
Monday, November 27, 2006 - 01:33 pm, by: Mark Paddick(Sparks)
Both are bloody good engines. The Nissan will have the edge 'cos it's 500cc bigger. It's power and torque compare more to the VVTi Toyota engine which is interesting as I'm putting one of them in a Soarer and my mate is sticking the VH45 in a 500 series coupe. He has less weight in the Merc and possibly better chassis/handling but I have more revs and a manual. I'll let you know which is the better re standard engines.
As for building them for power, both are good strong engines. The one with the most cash thrown intelligently at it will win.
Friday, December 01, 2006 - 12:21 am, by: Anthony Klysz(Yaggus)
Evening all, Ben's mate here. While I am normally busy arguing that Toyota engines are much better than Nissan engines this time I am arguing the opposite. No I havent lost my mind because Nissan actually went all out in designing this engine and it has a MONSTER spec sheet from factory. I did ask Ben to post all this info for me on here, but not long after telling him to, he got well drunk and passed out on a chair. So I have taken it upon myself to inform the uneducated of the joys of the VH45de. I will dispense this information............ now.
"It's out of the Infiniti M45, Q45 and FX45. It's a 4.5L, double over head cam, 32 valve V8 with forged crank/rods/pistons (which are also anti-friction molly coated), has titanium valves that are sodium filled on the exhaust side, micropolished cam lobes all in an aluminium block. It makes 340 hp and 451 Nm of torque.
Closed deck engine 6 bolt mains, 2 are crossed 274.22CI, 4494CC Bore/stroke- 93x82.7mm (3.66/3.256in) Multiport fuel injection with equal length runners 370CC injectors 2 compression piston rings 1 oil piston ring 10.2:1 Compression Ratio 8 individual cast aluminium intake manifolds, each feeding into dual ports.
Each manifold has a cylinder number cast on one side which faces towards the valvecover when installed. Intake manifold #8 also retains a side bracket that houses one of the fuel pressure regulators Intake manifold to cylinder head bolts are 12mm, 2 per manifold
Chain driven oil pump. Timing chains, not belts. Thick steel crankshaft. Deep skirted block with one piece 4 bolt main bearing beam, crossbolted. (To give you an idea how rigid the bottom end is, the casting is almost as thick as my mate's dad's 3000HP doorslammer drag engine that does 6sec. passes) Block also has massive crossribs cast into the top for serious rigidity. Hypereutectic pistons, lightweight but strong, good for big revs. Generously sized connecting rods. Very reliable valvetrain with hydraulic roller rockers. 6000rpm redline. à Capable revving to 7300rpm reliably with an ECU upgrade."
Most of this info has been gleaned from http://www.vh45de.com/ (if you don't want me posting another website within yours, feel free to delete, but I figured it was ok given it has nothing to do with Toyotas)
These engines have been proven to be reliable with 10psi of boost and stock ECUs and internally stock. There is a Z32 300zx with this setup that regularly features in drifting comps, so you know it gets punished. Well I'm tired but will post more when/if I think of something else.
Now I want to hear you dissect what I have said and argue which is the better engine.
Friday, December 01, 2006 - 12:53 am, by: Mark Paddick(Sparks)
I'd have either of 'em, but just at the moment I need a replacement for a Soarer so it WILL be a VVTI 1UZFE. Just because it's easier to stay with a Toyota engine. I think the VVTi Toyota engine will outrev the Nissan but not by that much and it has essentially identical power and torque ratings. The non-VVTi Toyota is down on power and torque but should rev a bit better being that bit smaller and also having good internals; 6200rpm from the factory or 6600 in the US with aftermarket modded factory ECU's having up to the 8000 hard wired limit. The VH45 with VVTI or whatever the Nissan equivalent is would be interesting.
I stand by my original "Both are bloody good engines". The specs for both are amazingly similar but that was always the Japanese trend.
Sunday, December 03, 2006 - 10:36 am, by: Mark Paddick(Sparks)
It's the shape that makes it unpopular I think. The Toyota is taller and narrower which makes it easy to fit just about anything. Just a power bulge in the bonnet gets clearance for most things. Whereas the Nissan has to have the width.
I can't wait to see how it'll go in the Merc. The only thing the old Merc hasn't got is a decent engine (5litre V8 Merc engines of that era really were rubbish!). I think the extracapacity of the Nissan will suit the Merc.
Sunday, December 03, 2006 - 10:13 pm, by: Anthony Klysz(Yaggus)
Mark Paddick wrote on Sunday, December 03, 2006 - 10:36 am:
It's the shape that makes it unpopular I think. The Toyota is taller and narrower which makes it easy to fit just about anything. Just a power bulge in the bonnet gets clearance for most things. Whereas the Nissan has to have the width.
THe VH45de isnt that wide. I know for a fact that they fit in the engine bay of a 240Z and they sure as hell don't have the biggest engine bay around.
Mark Paddick wrote on Friday, December 01, 2006 - 12:53 am:
The VH45 with VVTI or whatever the Nissan equivalent is would be interesting.
VTC is what your talking about and yes it already comes with it. The torque curve is barely its name. The curve is more of just a line, especially once modified. A guy in the US made this post:
I sent away for the SAE paper on the VH45DE and there is a Power Output chart. It shows that at 800 rpm there is almost 325Nm. of torque available.
Thats pretty sweet.
I will try and find the thread that has the official weight and easurements for you guys.
Monday, December 04, 2006 - 12:47 am, by: Mark Paddick(Sparks)
The VH45 fits a V8 Mercedes engine bay better than either a 1UZ or the original Merc 5 Litre. The 1UZ is still easier to fit in a lot of other cars though.
If it already has the equivalent of VVTi then it is down a bit compared to a 1UZ VVTI as it's bigger and has almost exactly the same power and torque.