question= 20v vvt top seal removal rev past 10k rpm????

[Mr Revhead]

ok... never seen that.
unless its old warner bros im not into cartoons!

[Hiro]

I've questioned why it can't be done.

Stock bike engines get well past 10k rpm, I'm pretty sure Formula 1's get to at least 10k. Why not make normal cars do that? Sure you'd need much lighter internals and a new (fast) ECU, but why not?

I'm preparing myself to be shot down in flames...

Formula 1 cars have ridiculously short stroke. This means that torque is practically non-existant. A 3L V10 F1 car makes somewhere in the vicinity of 800-900HP, yet a stock Falcon probably has more torque than it. Low torque is very bad for drivability, which is probably the main thing you want in a normal car - wide power band, fat torque curve so you don't have to rev its tits off just to make it go.

Then, there are all the component enhancements you need to make it rev that high. Its more than just lightening rods etc, valves and vavle springs will start to float with shocking regularity if you run them at too high a speed. This is one reason why F1 cars run pneumatics in their valvetrains, to prevent valve-float.

There are many more reasons too, but the ones above by themselves are enough to make it completely impractical for road use

[takai]

But i rev my 4AGE in my AE86 to 11,000rpm, all i did was fit an aftermarket tacho

[M.J.H]

Formula 1 cars have ridiculously short stroke. This means that torque is practically non-existant. A 3L V10 F1 car makes somewhere in the vicinity of 800-900HP, yet a stock Falcon probably has more torque than it. Low torque is very bad for drivability, which is probably the main thing you want in a normal car - wide power band, fat torque curve so you don't have to rev its tits off just to make it go.

Then, there are all the component enhancements you need to make it rev that high. Its more than just lightening rods etc, valves and vavle springs will start to float with shocking regularity if you run them at too high a speed. This is one reason why F1 cars run pneumatics in their valvetrains, to prevent valve-float.

There are many more reasons too, but the ones above by themselves are enough to make it completely impractical for road use

I think I remember reading somewhere that they went to the pneumatics because they couldn't get past 12000 rpm with springs.

[4agte]

I think I remember reading somewhere that they went to the pneumatics because they couldn't get past 12000 rpm with springs.

yup but i think it was a little higher than that 13-14k

[clubagreenie]

There was an article in a recent Race Tech mag, re developing the current series F1 engines prior to the "freeze". I can't remember the manufacturer but they were pushing current engines to 24000rpm for 24 hour periods (and keeping them together!) so running multiple races to only 18/19000 rpm wasn't going to be an issue.

[4agte]

yet renalt still had issues keeping theirs together for 1 sesson hhahah

[clubagreenie]

When Ed returns the collection of mags, I'll scan it.

[bje10s]

thats it inital d!!! act 9 series 2 and act 10. but ive also read it somewhere in a fast fours mag ill scan the artical in tomorrow morning.

but as i said i have no intention of build such an engine i just wanted to confirm what i heard.

i can help with the f1 issue they now have a limit of 19000rpm down from 20000rpm because it was costing the low budget teams SPYKER etc to much to build a engine every race that could rev to 20000rpm so the fia introduced that teams have to use their engine for 2rounds of racing + qualifying to give low budget teams fair playing ground. only if the engine blows they can touch it.

f1 are now v8's they run a short stroke and a dry sump. GO TOYOTA!!!!!!!!!!

[takai]

thats it inital d!!! act 9 series 2 and act 10. but ive also read it somewhere in a fast fours mag ill scan the artical in tomorrow morning.

but as i said i have no intention of build such an engine i just wanted to confirm what i heard.

i can help with the f1 issue they now have a limit of 19000rpm down from 20000rpm because it was costing the low budget teams SPYKER etc to much to build a engine every race that could rev to 20000rpm so the fia introduced that teams have to use their engine for 2rounds of racing + qualifying to give low budget teams fair playing ground. only if the engine blows they can touch it.

f1 are now v8's they run a short stroke and a dry sump. GO TOYOTA!!!!!!!!!!

Yes, we can read press releases too, and forums, and Atlas F1.....

Although that last one is probably over your head.

[The Witzl]

This thread is no longer on topic, nor does it really contain any "Tech & conversions" info beyond the original question and answer.

Locked now.