Ninehigh
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| posted on 20/4/09 at 08:42 PM |
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What's CR?
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iank
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| posted on 20/4/09 at 09:08 PM |
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quote:
Originally posted by Ninehigh
What's CR?
Compression ratio. Optimal value is higher for NA cars.
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Never argue with an idiot. They drag you down to their level, then beat you with experience.
Anonymous
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iank
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| posted on 20/4/09 at 09:19 PM |
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Here's an interesting idea of using a small turbo (quick spool, no nasty power surge mid corner, higher CR possible) to boost torque at low revs
with minimal engine changes required.
http://autospeed.com/cms/A_111106/article.html
While it's a waste of time according to the big bhp is better pub debates, but as the adage goes torque wins races. Would certainly make a
peaky engine much more tractable on the road. Small turbos cost peanuts relatively as they're the ones replaced by people seeking big bhp.
Might well suit a BEC.
I'm still undecided...
[Edited on 20/4/09 by iank]
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Never argue with an idiot. They drag you down to their level, then beat you with experience.
Anonymous
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Ninehigh
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| posted on 20/4/09 at 09:38 PM |
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I've always said peak bhp figures are only relevant if you constantly drive round at 5000rpm, where torque is the real shove you need.
I read something about low pressure turbos in Saabs and that looks like a really good idea, especially if I don't have to do much engine
fettling!
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brianthemagical
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| posted on 20/4/09 at 09:47 PM |
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Give prodrive a call, they may sell you a variable CR engine. I'm guessing it cost a couple of quid like, but maybe.
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Ninehigh
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| posted on 20/4/09 at 09:53 PM |
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Oh I've got a brilliant deal on an engine already. 1.8 BMW unit, cost? I got to wait until he's broken the car apart and I have to let him
help me build it!
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