Why do car makers do things to annoy mechanics!!!

[Mr Revhead]

Yeah, we all bitch about some of the cars we have worked on. You should hear me go off sometimes....

[iOnic]

dont get me wrong they have their fsults but wanking on that they are worse than alfas and fiats it just crazy.

I'll give you that At least Rotors are cool. I actually like the sound of a ported rotary I think they sound awesome. Each to their own I guess.

and as for the "not 1.3L" They are advertised, Sold and Registered as 1.3L.

Supras/GTR's are advertised, sold and registered as having 280hp. The true number is slightly north of that. Blacktop power figures - actual vs quoted = two somewhat different numbers. Manufacturers lie. Saying their 13b is a 1.3 litre engine that makes huge power is more impressive than saying it's a lazy 3.9L engine - only one of these statements will sell cars and let's face it, most people wouldn't know any different anyway. It's called marketing.

Just because they have 3 combuston strokes per "crank" revolution doesnt mean they have any more displacement, they have good design.

No it has a larger displacement because it displaces a higher capacity in the process of achieving a full Wankel cycle.

also how are they not a 4 stroke engine? that still have inlet, compression, ignition and exhaust "strokes"??

2 strokes do all the above too - does that make them 4 strokes? A rotary can't be a 4 stroke engine because it's not a reciprocating engine - there is no stroking to happen. The "stroke" is the up and down movement of a piston. It is a Wankel engine and operates on a Wankel cycle - it is neither a 4 stroke nor a 2 stroke. 2 stroke means it completes the cycle (intake, compression, ignition, exhaust) in 2 strokes of the piston or one revolution of the crank. A 4 stroke does it in 4 strokes of the piston (2 revolutions of the crank) and a Wankel cycle engine does the same thing in 3 revolutions of the crank.

This is why they make low torque figures, they take another 360deg of crank rotation for each face of the rotor to complete the combustion cycle. They also flow a lot of exhaust gases due to their large capacity - hence why they can spool such huge turbos without any issues - if they were really a 1308cc engine, they'd have a real job spooling a GT35 turbo with a huge exhaust housing yet this is the norm on rotaries.

This isn't rotor hate btw. I love them - a common combustion chamber means they are physically small and light but their large displacement means they are good for lots of power. Few moving parts is good too - yes they're not perfectly reliable but they are revolutionary in many ways.

[Mr Revhead]

but they are revolutionary in many ways.

oh hardy har har

[iOnic]

but they are revolutionary in many ways.

oh hardy har har

[Al]

but they are revolutionary in many ways.

oh hardy har har

o i c wat u did thar

[iOnic]

BTW, if OP had been working on a Rotary and not a transverse V6 - he wouldn't have had to bitch about how cramped shit was.

[d1 mule]

Just because they have 3 combuston strokes per "crank" revolution doesnt mean they have any more displacement, they have good design.

No it has a larger displacement because it displaces a higher capacity in the process of achieving a full Wankel cycle.

^ going by that statement an inline 4 cylinder 2 Liter engine engine should be classed as a 8 litre then shouldnt it, as

it displaces a higher capacity in the process of achieving a full cycle

[Mr Revhead]

[iOnic]

Just because they have 3 combuston strokes per "crank" revolution doesnt mean they have any more displacement, they have good design.

No it has a larger displacement because it displaces a higher capacity in the process of achieving a full Wankel cycle.

^ going by that statement an inline 4 cylinder 2 Liter engine engine should be classed as a 8 litre then shouldnt it, as

it displaces a higher capacity in the process of achieving a full cycle

lolwut?

[bzrspeed]

i do not understand, why would 2l, 4 stroke be a 8l engine?

I think i cause problem, i am sorry. I dont want to hurt feelings or make trouble yes!

Worked on a land cruiser today, so simple and easy, also replaced rear shocks on a commodore wagon, and rack ends on a gti golf, all in same time as mazda autozam...

[bzrspeed]

..

[iOnic]

Get another work visa?

[bzrspeed]

can only have 1. Its ok i just needed to get it off my chest (correct english yes?)

[iOnic]

Yes correct english. So you cant extend your visa or anything?

[RomanV]

I cringe every time I hear the "But it's good for a 1.3l" argument.

[duddley]

Just marry a kiwi solo mum, Their easy enough to find

[bzrspeed]

yes lots of young girls have sexual experence and have child with no marry or long term goal.

I dont think my current girl friend will like me marry other girl. I think she may be upset.

[Leon]

Just don't tell her. What could possibly go wrong?

[RomanV]

I guess my main gripe with the "it's a 1.3 litre engine, therefore its good" argument is:

If the engine had 100% VE, how much air would it consume over a set period of time, say 1 minute?

And the answer as best I can figure, is the same amount as a 2.6 litre 4 stroke 6 cyl engine. (Or it might be 3.9 litre as per that thread... But it's definitely not comparable to a 1.3)

This doesnt mean that it's an amazing design for a 1.3 litre, it just means that it's not really a 1.3 litre at all, in any way that's comparable to a piston engine.

If you want to rate something as a 'good' engine then what are the criteria?

-Does it make good power, for a given amount of air and fuel? No.
(Which not only means its uneconomical, but also doesnt make high amounts of power efficiently either)
-Does it have comparable or better longevity to a piston engine? No.
-Does it have potential to make a lot of power? Yes.
-Does it sound cool? Yes, in my opinion.
-Is it a compact design for the 'real' displacement and attainable power levels compared to alternatives? Definitely
-Is it a totally sweet engine for a race car or something? Definitely!

[bzrspeed]

if so good race engine, why only mazda from japan use it? Everyone else use piston engine? That not make sense.

Most used race engine i would think would be ford or chevy v8, in my home country it is cosworth turbo and fiat twin cam most used. Never seen wankel back home, only when come to nz.