Track 2005 engine
#21
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A friend pointed out to me that the nissannews.com site had a media site called "The 35 days of the Z" which I can't find any longer. The 35th day of the media presentation listed the Track and Anniversary Z engine changes, written down by my friend:
1- strengthened connecting rods and bolts
2- double-mass crank pulley
3- strengthened valve springs
4- revised shape of the piston head
5- new camshaft profile
6- remapped ECM
7- addition of valve timing control to the exhaust cam
8- modified intake w/ shorter and wider runners
9- revised oil pan baffling and more
1- strengthened connecting rods and bolts
2- double-mass crank pulley
3- strengthened valve springs
4- revised shape of the piston head
5- new camshaft profile
6- remapped ECM
7- addition of valve timing control to the exhaust cam
8- modified intake w/ shorter and wider runners
9- revised oil pan baffling and more
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if the gearing of the transmission has not changed, there should not be a significant difference in performance, but the track engine should accelerate the car faster at higher rpms than the 287 version. Even though the track version gives up peak torque, it holds the torque level for longer in the rpm range with less drop off. 300 hp at 6400rpm translates to 246 lbs torque. The other engine, which has slightly less hp 6400rpm, est. 285, is only making 235 lbs torque. Overall the torque curve for the new engine should be flatter and last longer, meaning it should accelerate harder.
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Originally posted by cupcar
A friend pointed out to me that the nissannews.com site had a media site called "The 35 days of the Z" which I can't find any longer. The 35th day of the media presentation listed the Track and Anniversary Z engine changes, written down by my friend:
1- strengthened connecting rods and bolts
2- double-mass crank pulley
3- strengthened valve springs
4- revised shape of the piston head
5- new camshaft profile
6- remapped ECM
7- addition of valve timing control to the exhaust cam
8- modified intake w/ shorter and wider runners
9- revised oil pan baffling and more
A friend pointed out to me that the nissannews.com site had a media site called "The 35 days of the Z" which I can't find any longer. The 35th day of the media presentation listed the Track and Anniversary Z engine changes, written down by my friend:
1- strengthened connecting rods and bolts
2- double-mass crank pulley
3- strengthened valve springs
4- revised shape of the piston head
5- new camshaft profile
6- remapped ECM
7- addition of valve timing control to the exhaust cam
8- modified intake w/ shorter and wider runners
9- revised oil pan baffling and more
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the track engine should accelerate the car faster at higher rpms than the 287 version. Even though the track version gives up peak torque, it holds the torque level for longer in the rpm range with less drop off. 300 hp at 6400rpm translates to 246 lbs torque. The other engine, which has slightly less hp 6400rpm, est. 285, is only making 235 lbs torque. Overall the torque curve for the new engine should be flatter and last longer, meaning it should accelerate harder.
#29
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I think will all agree that the new 300 engine is much better than the 287 engine in the 6000 - 7000 RPM range. The thing you guys are forgeting is that that 6000 - 7000 RPM area is rarely ever used except at the drag strip. I think that if you look at the area under the curve of the torque on the 287 and 300 engines between 1000 and 5500 that the 287 will have more. That is what I would call useable fun to drive torque.
#31
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Originally posted by King Tut
I think will all agree that the new 300 engine is much better than the 287 engine in the 6000 - 7000 RPM range. The thing you guys are forgeting is that that 6000 - 7000 RPM area is rarely ever used except at the drag strip. I think that if you look at the area under the curve of the torque on the 287 and 300 engines between 1000 and 5500 that the 287 will have more. That is what I would call useable fun to drive torque.
I think will all agree that the new 300 engine is much better than the 287 engine in the 6000 - 7000 RPM range. The thing you guys are forgeting is that that 6000 - 7000 RPM area is rarely ever used except at the drag strip. I think that if you look at the area under the curve of the torque on the 287 and 300 engines between 1000 and 5500 that the 287 will have more. That is what I would call useable fun to drive torque.
Low-end torque is pretty useless unless you want to pull heavy load. Certainly not in a sport car !
When do you get to use 100% torque at 3000 rpm ? You would need to be WOT going up a steep enough hill pulling a trailler so that the car can not accelerate any more. Then you use all your torque.
So what if you get more torque using 60% throttle. I'll just give 62% throttle and keep up. I'll still have enough torque to smoke the tires, and if I really want to go faster, I won't be below 5000 rpm for long.
Low end torque is good for drivability at low speed. Both engine have plenty usable torque and low rpm. There won't be much difference there.
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Originally posted by cupcar
Another way to look at it is torque is only a force, horsepower is capacity to do work/time which is force X distance traveled/time.
Horsepower with the right gearing usually wins- except sometimes when the time to shift gears is added in....
Another way to look at it is torque is only a force, horsepower is capacity to do work/time which is force X distance traveled/time.
Horsepower with the right gearing usually wins- except sometimes when the time to shift gears is added in....
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I talked to Nissan parts guru Dave Burnette a week or so ago and he said he had the latest parts diagrams SR20DEN.
Basically, he said ANYTHING that rotates/moves in the engine was a different part number on the '05s.
I think they changed A LOT more then most think.
Basically, he said ANYTHING that rotates/moves in the engine was a different part number on the '05s.
I think they changed A LOT more then most think.
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He just emailed me and said,
Anniversary & Track only! And EVERYTHING on the bottom end is diff! On the the top end, its the cams/chains/covers/vt crap that's different. And YES, the oil pump is a new one !
#35
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I wonder if any of the parts are from this list of jewels:
Nismo engine kit
If you use Google, right click on the page and select "Translate to English"
Makes me very interested, The only thing I've missed from my stolen Integra Type R is an engine that revs!!
Nismo engine kit
If you use Google, right click on the page and select "Translate to English"
Makes me very interested, The only thing I've missed from my stolen Integra Type R is an engine that revs!!
#38
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Here is description of the S1 engine kit, use your Google right click to translate to English
Nismo S1 engine kit
Note that it just consists of different cam timing units, cams, air filter, ECU, stronger, rod bolts and change intake system and carbon engine cover with different spark plugs shown in the picture. Listed in the text are changes to the exhaust catalysts on back plus different valve springs.
Sounds like the Track engine is a lot more than the S1 kit.
Nismo S1 engine kit
Note that it just consists of different cam timing units, cams, air filter, ECU, stronger, rod bolts and change intake system and carbon engine cover with different spark plugs shown in the picture. Listed in the text are changes to the exhaust catalysts on back plus different valve springs.
Sounds like the Track engine is a lot more than the S1 kit.
Last edited by cupcar; 01-21-2005 at 10:22 AM.
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I'm anxious to see a dyno on one of these cars. I'm really curious what exactly they did with the ECM.
Former ITR owner here by the way...I had a Championship White '98 #765. Theives tried to steal it once when I owned, and at least twice from the guy I sold it to...bastards.![Mad](https://my350z.com/forum/images/smilies/mad.gif)
I do miss those revs sometimes!
Former ITR owner here by the way...I had a Championship White '98 #765. Theives tried to steal it once when I owned, and at least twice from the guy I sold it to...bastards.
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I do miss those revs sometimes!