Toyota engine revs high

[AChilds]

The new RXI blueprined engine from Toyota revs higher than a Ferraris Enzo's v12 Powerplant...

Power cannot be compared to the Enzo, but a measly 1.8 litre 4 pot revving higher than a 6 litre V12??? cool

And at around 6000 rpm, a pin slips into the oil sump, which locks the cams with the engines rpm, boosting power instantly... Cool

Anyone wanna comment...

 

And at around 6000 rpm, a pin slips into the oil sump, which locks the cams with the engines rpm, boosting power instantly... Cool

A pin slips into the oil sump ?

Locks the cams with the engine rpms ?

I'll refrain from commenting on those two statements.

 

[0roo0roo]

i thought cams were always synced? eh?

 

[Vortex22]

Umm what? Small engines generally rev higher than large ones.

 

[BatmanNate]

She revs high.

 

[GroundZero]

had bearings rated for 15,000 rpm in my celica california gt.
would rev to just about 11k before i had fuel issues.
but there was some serious work that went into that motor and drive train...

 

[Zenmervolt]

Originally posted by: Roger

And at around 6000 rpm, a pin slips into the oil sump, which locks the cams with the engines rpm, boosting power instantly... Cool

A pin slips into the oil sump ?

Locks the cams with the engine rpms ?

I'll refrain from commenting on those two statements.

I know that Honda's variable valve timing and lift electronic control system uses a pin in the camshaft to engage the high-lift, long-duration cam profile. Perhaps he's confused. Very confused. Considering the "boosting power instantly" comment, very, very confused.

ZV

 

Hey Zem, I didn't want to comment or explain in detail how variable camshaft systems work because it will inevitably turn ugly as the previous threads have.

And at around 6000 rpm, a pin slips into the oil sump, which locks the cams with the engines rpm, boosting power instantly... Cool

Pins do not slip into the oil sump, an oil sump is another word for oil pan, a pin engages a separate set of camshaft lobes under directed oil pressure at a preset R.P.M., this second set of camshaft lobes are designed for high speed cylinder filling (High lift and large overlap) while the primary lobes (Low lift and small overlap) are designed for low speed cylinder filling.

 

[Zenmervolt]

Originally posted by: Roger
Hey Zem, I didn't want to comment or explain in detail how variable camshaft systems work because it will inevitably turn ugly as the previous threads have.

And at around 6000 rpm, a pin slips into the oil sump, which locks the cams with the engines rpm, boosting power instantly... Cool

Pins do not slip into the oil sump, an oil sump is another word for oil pan, a pin engages a separate set of camshaft lobes under directed oil pressure at a preset R.P.M., this second set of camshaft lobes are designed for high speed cylinder filling (High lift and large overlap) while the primary lobes (Low lift and small overlap) are designed for low speed cylinder filling.

I'd kind of figured that the bit about the oil sump was obvious enough not to need comment.

ZV

 

[andylawcc]

the 1.6L on the 85-89 corolla can be revved to 12k rpm (after heavy modifications of course), it is used in the KART race cars (the engine is better known as the Formula Atlantic 4AGE.)

 

[WinkOsmosis]

Originally posted by: Vortex22
Umm what? Small engines generally rev higher than large ones.

An I4 isn't as perfectly balanced as a V12 though... aren't V12s perfectly balanced?

 

[Howard]

Originally posted by: Roger

And at around 6000 rpm, a pin slips into the oil sump, which locks the cams with the engines rpm, boosting power instantly... Cool

A pin slips into the oil sump ?

Locks the cams with the engine rpms ?

I'll refrain from commenting on those two statements.

 

[Howard]

Originally posted by: WinkOsmosis

Originally posted by: Vortex22
Umm what? Small engines generally rev higher than large ones.

An I4 isn't as perfectly balanced as a V12 though... aren't V12s perfectly balanced?

Yes, they are. Larger I4s require 1 or 2 balancer shafts.

 

[Eli]

Originally posted by: WinkOsmosis

Originally posted by: Vortex22
Umm what? Small engines generally rev higher than large ones.

An I4 isn't as perfectly balanced as a V12 though... aren't V12s perfectly balanced?

No. They are more well balanced naturally, without balance shafts, than a 4 cylinder or 6 cylinder, though.


And.. some links would be nice.

 

[Howard]

Originally posted by: Eli

Originally posted by: WinkOsmosis

Originally posted by: Vortex22
Umm what? Small engines generally rev higher than large ones.

An I4 isn't as perfectly balanced as a V12 though... aren't V12s perfectly balanced?

No. They are more well balanced naturally, without balance shafts, than a 4 cylinder or 6 cylinder, though.


And.. some links would be nice.

V12 engine config

And I somehow knew that you were going to post in this thread.

 

[Zenmervolt]

Originally posted by: Eli

Originally posted by: WinkOsmosis

Originally posted by: Vortex22
Umm what? Small engines generally rev higher than large ones.

An I4 isn't as perfectly balanced as a V12 though... aren't V12s perfectly balanced?

No. They are more well balanced naturally, without balance shafts, than a 4 cylinder or 6 cylinder, though.


And.. some links would be nice.

Actually, it's only the 60 degree V12 that's balanced.

ZV

EDIT: Er, make that V12 with 60, 120, or 180 degrees between the banks.

 

[KokomoGST]

Well, a lot of Japanese manufacturers (Honda included) have had a lot of success in revving their 4bangers to high heaven to squeeze the maximum power out of them. Heck, Toyota has had a 1.8L made to rev well past 11k in it's race engines for quite a while now.

Honda engineers have race versions made to rev into range as well. People mod the standard engines here in the states to do the same. It's one of the best ways to wring out more power out of an NA application. All the F1 cars rev WAY up there... I think a lot of teams are running V10s currently... iirc BMW, Ford/Jaguar, and even Ferrari are all running V10s.

 

[Eli]

Originally posted by: Howard

Originally posted by: Eli

Originally posted by: WinkOsmosis

Originally posted by: Vortex22
Umm what? Small engines generally rev higher than large ones.

An I4 isn't as perfectly balanced as a V12 though... aren't V12s perfectly balanced?

No. They are more well balanced naturally, without balance shafts, than a 4 cylinder or 6 cylinder, though.


And.. some links would be nice.

7


V12 engine config

And I somehow knew that you were going to post in this thread.

Well.. No engine is perfectly balanced. They come close, but ..

V12s, 60 degree V6s are the two most balanced designs.. yes.

I don't really know much about it, it gets pretty complicated.

 

[Eli]

That link is cool, though.

There was a thread about engine balance a while back.. I can't find it though.

The Volkswagen W12 is awesome.

 

[mAdD INDIAN]

The BMW/Williams F1 engine revs to 18k RPM. Those are tiny 3.5L V10s.

Usually engines with a smaller stroke are able to rev higher than larger engines (with a larger stroke).

 

[Zenmervolt]

Originally posted by: KokomoGST
Well, a lot of Japanese manufacturers (Honda included) have had a lot of success in revving their 4bangers to high heaven to squeeze the maximum power out of them. Heck, Toyota has had a 1.8L made to rev well past 11k in it's race engines for quite a while now.

Honda engineers have race versions made to rev into range as well. People mod the standard engines here in the states to do the same. It's one of the best ways to wring out more power out of an NA application. All the F1 cars rev WAY up there... I think a lot of teams are running V10s currently... iirc BMW, Ford/Jaguar, and even Ferrari are all running V10s.

F1 uses V10 engines because they offer the best compromise between power and efficiency given the displacement limits. Some teams have tried V8 engines in the hope that increased efficiency (fewer fuel stops) would offset the marginal power loss, but that didn't work out well. Teams also tried V12 in the hopes that the marginal power increase would offset the engine being thirstier, but that didn't work well either. The V10 turned out to be the best compromise.

ZV

 

[Sukhoi]

Originally posted by: andylawcc
the 1.6L on the 85-89 corolla can be revved to 12k rpm (after heavy modifications of course), it is used in the KART race cars (the engine is better known as the Formula Atlantic 4AGE.)

Really? I have a '88 Corolla FX. Of course it has the damn deadspot in the gas pedal that makes pulling out into traffic a bit interesting.

 

[Howard]

Originally posted by: KokomoGST
Well, a lot of Japanese manufacturers (Honda included) have had a lot of success in revving their 4bangers to high heaven to squeeze the maximum power out of them. Heck, Toyota has had a 1.8L made to rev well past 11k in it's race engines for quite a while now.

Honda engineers have race versions made to rev into range as well. People mod the standard engines here in the states to do the same. It's one of the best ways to wring out more power out of an NA application. All the F1 cars rev WAY up there... I think a lot of teams are running V10s currently... iirc BMW, Ford/Jaguar, and even Ferrari are all running V10s.

V10s are required.

 

[Zenmervolt]

Originally posted by: Howard

Originally posted by: KokomoGST
Well, a lot of Japanese manufacturers (Honda included) have had a lot of success in revving their 4bangers to high heaven to squeeze the maximum power out of them. Heck, Toyota has had a 1.8L made to rev well past 11k in it's race engines for quite a while now.

Honda engineers have race versions made to rev into range as well. People mod the standard engines here in the states to do the same. It's one of the best ways to wring out more power out of an NA application. All the F1 cars rev WAY up there... I think a lot of teams are running V10s currently... iirc BMW, Ford/Jaguar, and even Ferrari are all running V10s.

V10s are required.

No, not required. There is only a displacement limit. IIRC Ford had a V8 for a few years.

ZV

 

[PsychoAndy]

This is why people need to lurk more.