Any high power Q's around?

[maxnix]

PRICELESS.

The point is with enough cubic inches (a la V10 Viper), a larger crude engine design can over come a smaller sophisticated. What Shelby and Ford proved at Le Mans in the sixties. Gas turbines are the most efficient engines in the world, but not very practical for the street.

The Q wins when it passes these monsters at the pump which they must visit twice as often. Why race cars use pressurized refueling when the rules permit.

An interesting engine is the twin turbo V10 diesel in the Toureg. Heavy, for sure, but monster torque output, and thus quite fast off the line in even that heavy vehicle.

[MattB]

An interesting engine is the twin turbo V10 diesel in the Toureg. Heavy, for sure, but monster torque output, and thus quite fast off the line in even that heavy vehicle.

And sadly we won't be seeing that engine anymore. VW has dropped it from the US lineup. Still a very sweet engine though...we once had a used V10 TDI Touareg at the dealership I work for during the summer and the thing was a monster.

[Q45tech]

http://www.maintenanceworld.co...2.htmhttp://www.eng.wayne.edu/page.php?id=759

http://www.mce-5.com/mce-5_tec...s.htm

[heywier427]

what parts are forged ans possibly interchangeable? 900 horses sounds fun!

[one ton garage]

wow good reads, but leaves me with more questions now....

The Ford Cobra motor comes with all forged internals... crank, rods, pistons, etc. and a CR of 8.5:1 I believe. VH45 has at the least a forged crank, but I believe spindly rods, and definitely a not-very-boost-friendly CR.

AHA! I knew some googling would result in something useful:http://www.turbochargedpower.c...s.htmScroll down a bit to see excerpts from the super rod article I was talking about... now that I know which issue it was from I'll have to try and dig it up, since that page doesn't include the numbers the engine put out when they dynoed it in n/a form, at 8.5:1. Again, if the 4.6L MOD motor can do it.... no reason the 4.5L VH45 can't...

[Cathode]

wow good reads, but leaves me with more questions now....

The Ford Cobra motor comes with all forged internals... crank, rods, pistons, etc. and a CR of 8.5:1 I believe. VH45 has at the least a forged crank, but I believe spindly rods, and definitely a not-very-boost-friendly CR.

AHA! I knew some googling would result in something useful:http://www.turbochargedpower.c...s.htmScroll down a bit to see excerpts from the super rod article I was talking about... now that I know which issue it was from I'll have to try and dig it up, since that page doesn't include the numbers the engine put out when they dynoed it in n/a form, at 8.5:1. Again, if the 4.6L MOD motor can do it.... no reason the 4.5L VH45 can't...

Thats why I am a proponent of the 5.6l vk it is almost a slightly stroked big bore ford 4.6l. The problem i have is finding a suitable chasis. I want an m45 but money aint making that happen . The import guys usually don't get it unless they are entusiast. Torque is the most realistic measure of engine efficency. What keeps torque from being the holy grail of auto racing lack of light weight gear boxes that can withstand 600+ lbs/ft. Look at how hard the diesel drag racing guys have it!

[John Dixon]

If mine doesn't make 400bhp, I'll probably cry!I've got 98mm 12:1 slipper pistons, moly coated. Steel rods. Cams ground 30/70 70/30 with 10.8mm lift new valve springs and retainers, HLA changed for soilds. Heads ported and vavles back cut. 8 x 45mm throttles with IR intake design. Heders are 41mm ID, 990mm primary length to tune for ~5000rpm. Ali flywheel. Dry sumped with pace 3 stage gear pump scavange is ~75l/min/1k rpmAt the moment I'm only waiting on the ali crank pulley being made up so the bottom end can be assembled and balanced.Will post some pics of the parts soon, forgot my camera last time!!

[maxnix]

http://www.eng.wayne.edu/page.php?id=759

"The following conclusions are achieved, based on this research:

The wear occurred in the highest rate at the beginning of the break-in period. The wear rate then decreased sharply during the first hour. The wear reached its low steady rate after three and a half hours of engine break-in. Accordingly, the wear particles reached a high concentration in the oil after the first hour. Change the oil after one hour would reduce the wear in an engine."

Pretty good argument for early lubrication change and perhaps conversion to synthetic right away on a new engine.

[qsiguy]

If mine doesn't make 400bhp, I'll probably cry!I've got 98mm 12:1 slipper pistons, moly coated. Steel rods. Cams ground 30/70 70/30 with 10.8mm lift new valve springs and retainers, HLA changed for soilds. Heads ported and vavles back cut. 8 x 45mm throttles with IR intake design. Heders are 41mm ID, 990mm primary length to tune for ~5000rpm. Ali flywheel. Dry sumped with pace 3 stage gear pump scavange is ~75l/min/1k rpmAt the moment I'm only waiting on the ali crank pulley being made up so the bottom end can be assembled and balanced.Will post some pics of the parts soon, forgot my camera last time!!

John, Are you doing this to a VH45 on a Q? If so, very cool. Can't wait to see it.

[elwesso]

"The following conclusions are achieved, based on this research:

The wear occurred in the highest rate at the beginning of the break-in period. The wear rate then decreased sharply during the first hour. The wear reached its low steady rate after three and a half hours of engine break-in. Accordingly, the wear particles reached a high concentration in the oil after the first hour. Change the oil after one hour would reduce the wear in an engine."

Pretty good argument for early lubrication change and perhaps conversion to synthetic right away on a new engine.

very interesting!!!!!!! Very interesting, this would be a great thing to post in the G35 and M forums since us Q guys dont have to worry about breaking in an engine!

[John Dixon]

John, Are you doing this to a VH45 on a Q? If so, very cool. Can't wait to see it.

Afraid not, it's going in a '92 300ZX. No reason you couldn't do it in a Q, but you'd probably want different cams with such a heavy car.

[DrewQ45]

"The following conclusions are achieved, based on this research:

The wear occurred in the highest rate at the beginning of the break-in period. The wear rate then decreased sharply during the first hour. The wear reached its low steady rate after three and a half hours of engine break-in. Accordingly, the wear particles reached a high concentration in the oil after the first hour. Change the oil after one hour would reduce the wear in an engine."

Pretty good argument for early lubrication change and perhaps conversion to synthetic right away on a new engine.

The break in period is a necessary one and there is no sense in delaying it.

"Breaking in an engine is a process of properly wearing-in the pistons/cylinders/rings, bearings, valves, camshaft, lifters, rockers, etc... In addition, part of the breaking in process is not only wearing-in and seating the internal engine components but also stress relieving the components as well. Crankshafts, connecting rods, pistons, blocks etc... have many stresses due to the casting or forging process, machining and welding process."

http://www.synthetic-oil-tech....l.htm

[qsiguy]

Afraid not, it's going in a '92 300ZX. No reason you couldn't do it in a Q, but you'd probably want different cams with such a heavy car.

Ooo, another VH in a 300ZX...it's a beautiful thing. No turbo(s)?

[John Dixon]

Ooo, another VH in a 300ZX...it's a beautiful thing. No turbo(s)?

No, definately not. I hate turbo engines, it's the reason I wanted to swap out the VG30DETT in the first place. Looking forward to NA response and no laaaagggggg

[qsiguy]

It should be a real kick in the butt. Always loved the 300Z.

Funny story about the 300ZX.....when I was about to get married my grandma was against her little grandson getting married and she offered to buy me a 300ZX if I called it off!..........

......went for the woman instead...I'll always wonder where I'd be if I took the other road... hehe

3 kids later....still never got that elusive Z car.

[defrag010]

http://www.maintenanceworld.co...2.htmhttp://www.eng.wayne.edu/page.php?id=759

http://www.mce-5.com/mce-5_tec...s.htm

Basically, all those links said is that there is more friction at the begenning of a breakin period before the hone finish forms the plateau and the rings start to seal... duh

You lose more power from the blowby and compression bleed than you do from the friction from a tight ring seal, not to mention you're contaminating your oil..Instead of doing it ghetto, you could always just use low-tension rings and a fine hone finish and get the same or better results.

The only time blowby should be acceptable is on large-gap poweradder motors.