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  #586  
Old 04-28-2013, 11:11 PM
oab_au oab_au is offline
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Re: Building a 10,000 rpm NA engine.

Quote:
Originally Posted by Dessertrunner View Post
There are plenty of computer simulators that can indicate how much increase in power can be expect by increasing the compression my issue with these is:-
- They don't talk about the gains at higher revs, by this I mean if higher compression enables you to move the maximum torques higher up the rev range then the gains are even greater because torque turns to HP.
- I have never seen one of these calculators for a flat engine, and my instinct is that our engine behave differently. We have short stroke, big bores, hi valve area. Its a whole different ball game.

You can't compare the behaviour of a flat engine to a V8 or straight 6, to do so is a insult to our intelligence.

Tony
Quote:
They don't talk about the gains at higher revs, by this I mean if higher compression enables you to move the maximum torques higher up the rev range then the gains are even greater because torque turns to HP.
Higher compression ratio will increase the torque, I think TomK worked out at 10%, it will be 10% higher right through the rev range.

It doesn't move max torque it just increases it. It is the breathing, cams, inlet track tuning, that will move the torque up the range.

The torque curve increases as the rpm increases, till Max torque is reached and the curve starts to drop off, but as the rpm is still rising, the "Torque X Rpm" still results in higher HP number, but as the rpm keeps increasing the breathing gets less, so the torque reduces, so the "T X RPM" reduces the HP number.

Harvey.
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  #587  
Old 08-01-2013, 03:35 PM
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Dessertrunner Dessertrunner is offline
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Re: Building a 10,000 rpm NA engine.

You guys may not be aware but I broke 2 rods on my road car
http://www.subaru-svx.net/forum/newr...ote=1&p=726534

I am dumb founded how strong the engine is, Bazza told mee the weakest part on our engine is rods his 100% right. You can follow progress on the link.
Tony
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