Wednesday, December 30, 2015

japanese car is a copy of german car

02-15-2005, 04:41 AM

i was under the impression that v-tec motors werent good under high boost.

Very few enignes will handle high boost with out the proper preperation.

As for why different manufactors produce engines with differnt power curves?
Well they each have thier own pholosophies, and ideas on how an engine shuld be built and how it should perform.
And they all spend differnt amounts on R&D, and have differnt requiments for thier enignes.

Honda has a history based around motorsport, they have been involved and active in F1 longer than any other manufactor except Ferrari and most of thier engine designs are enfluenced by thier motorspoty activties. Thier chassis designs are also influenced in a similar way, and so thier cars have a reputation as being a bit sporty and generaly fun to drive. Its what happens you use the same enigneers to design your passanger cars, and your F1 cars.
Honda also started building sports cars and race cars long before they made the Civic

Nissan on the other hand is a little differnt.
Prior to about 1980 all thier engine designs had been copys of out dated British Leyland and Mercedes designs, either copyed, or made uner licence. When they started making thier own engines they based them on these old designs. They all used very strong bottom ends and very basic cylinder heads with limit flow capacities, but they ablity to make lots of useable power and torque at low rpms.
Nissan started to develop these designs, and the CA18 series of engines combined the strong bottom end with a well designed cylinder head. Then at the end of the 80s they started to get into financial trouble, and it began to show in their cars.
The SR and RB series of engines both used a very well designed bottom end that is one of the strongest ever made, but thier cylinder heads were, when compared to other designs, rather poor.
Quite simply they couldn't afford to develop a good head, and instead developed some very very good turbo systems.

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