The maximum power will increase but the torgue will drop down.
Chris
----- Original Message -----
From: "joe dirt" <oldskooling@yahoo.com>
To: "barry rosenberg" <britcars@bellsouth.net>
Cc: <fot@autox.team.net>
Sent: Monday, June 13, 2005 10:46 PM
Subject: RE: 225hp
> It is my understanding that longer rods and shorter pistons is not what is
>making the power alone, it is designing a cam to take advantage of the greater
>piston dwell at tdc and other variables. So if they had put a cam in the motor
>that was designed to work with that combo I'm sure it would have made more
>power. I have not seen the article, so I don't know what they had before the
>longer rods/shorter pistons. As Barry has made the point a builder going from
>stock Triumph rods and stock sized pistons will see a great reduction in
>weight than say light aftermarket stock lenght rods and aftermarket stock
>sized pistons. The latter seems like the case in the Hot Rod article. As
>Smokey Yunick said "Use the longest rod you can fit in a motor." Also a forum
>(www.speedtalk.com) I frequent with some HUGE names in the engine builder
>circles had a thread on rod ratios. They basically resolved that it's a bunch
>of bs, and to follow Smokey's motto.
>
> barry rosenberg <britcars@bellsouth.net> wrote:
> I understand the new Hot Rod magazine issue has an article on longer
> verses shorter rods. They built an engine and swapped rods and pistons only.
> They found no power difference. I have not read it yet, but I must assume
> they had the rod/piston combinations weigh the same. I use longer rods in my
> TR4 motor so that I could reduce the piston size, weight, and friction. This
> should provide more rear wheel horsepower. So far it seems worth it. Who
> else is doing this to get rid of that huge TR4 piston? Barry
>
>
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