Pushrod Nascar engines are hitting 9000 and doing it for 500 miles or so.
Sure, not nearly as many RPMs as F1 engines but then again even CART engines
don't hit those RPMs either. RPMs = $$$$
For what one F1 engine costs I could buy a fleet of Roadsters and afford to
build a garage to house them.
BTW, doe anyone know what F1 blocks are made of? Someone told me they're made
of some super strong steel like what rollbars are made of.
Mike
----- Original Message -----
From: SLBESQ@aol.com
To: datsunmike@nyc.rr.com ; datsun-roadsters@autox.team.net
Sent: Friday, March 15, 2002 1:05 PM
Subject: Re: Twice as much
you make very good points. however, i think the engine's ability to rev has
most to do with the design of its valve train. moving the camshaft closer to
the valves allows the engine higher revs, pushrods being the limiting factor.
and as someone else aptly noted, at 7,000 rpms, you may want to watch out for
flying pushrods. in general, overhead cam engines will be able to rev higher
than a pushrod engine, all other things being equal. then to take that one
step further (as F1 teams do), you can eliminate the cam shaft
altogether.....using air for example to open and close the valves, or air to
open and springs to close....etc
s
67.5 MIZU
In a message dated 3/15/02 3:36:16 AM Pacific Standard Time,
datsunmike@nyc.rr.com writes:
The 2000 is a stroked 1600 that is fully counterbalanced, however 1600s
can
be revved quite high even though the cranks aren't fully counterbalanced.
The shorter stroke 1600 should be able to rev higher than a 2000. I have
heard of 3 main engines hitting 8000.
There's a lot more to revs than just the crank - valve springs play a very
important part. And of course careful balancing and preparation and
lightening of the reciprocating parts.
Mike
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