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Author Topic: SAVED: Cams  (Read 3785 times)

mhack

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    • http://akdusa.com/xr2
SAVED: Cams
« on: April 11, 2003, 07:13:00 PM »

Cams?

The mx5I ran worked with the o/lap, weight&gearing worked for my mx5.GTX
likes less o/lap more" bottom end". Still got the webcams that made the
miata idle crappy,sounded GREAT at idle. Never tied the auto cam though.
NickZ
----- Original Message -----
From: "Bob Bundy" <bundybob@e...>
To: <323gtx@yahoogroups.com>; "Fred H" <_supa_fly_@y...>
Sent: April 10, 2003 1:55 AM
Subject: Re: [323GTX] Cams?


> I have experimented just a little with cams and have attempted to research
> others experiences as well. I have a 90 Turbo miata and a 88 323 GTX. In
the
> miata I have tried, stock cams 5sp miata cams, GTX cams, miata automatic
> cams, and some cams that I bought that were supposed to be Webcam cams
from
> Corksport. I measured them and I believe they are webcam 207 grinds which
> have quite a bit more duration than Corksport lists on their website so
I'm
> not sure. So far my favorite combination is the Miata 5sp or GTX intake,
> which are the same, with the miata Automatic exhaust cam. This combination
> tends to spool the Garrett T28 turbo quicker and makes the car feel like
it
> has a little more torque. A little less duration on the exhaust seems to
be
> a small improvement to me not so much in peak power but in the shape of
the
> power and drivability.
>
> I do think that Mazda did a pretty good job of figuring out the cams and I
> don't think you can find big amounts of power by swapping cams. I think
even
> the people who have played with adjustable cam gears have not found any
> secrets. I am guessing that keeping just about stock duration and timing
but
> adding some lift will be about as good as you can do. Webcam makes a cam
> like this called a 505 grind. I know people seem to like but I haven't
seen
> any hard numbers as to the improvement. It also looks like about the same
> specs as what Corksport lists on their site as well. I think to get the
most
> benefit from bigger cams you would need to do a good port job on the head
at
> the same time. Naturally aspirated cars might like more duration but my
> turbo cars don't seem too and they don't like too much overlap either.
>
> I have measured all the lift profiles with a dial indicator in a engine
for
> the cams I have.
> Hears some data as well. Interesting that the 99+ cams have increased lift
> to just about where the Webcams are.
> http://members.aol.com/solomiata/cams.html
> http://www.webcamshafts.com/mazda-auto.html
> HKS also makes cams but I have no Idea what their specs are.
>
> I'd be interested in cams if there was a known benefit and the price was
low
> enough to justify the benefit. I do think you got a much bigger market
with
> Miatas but the engines are about the same an cams are interchangeable.
> Theirs probably more Miatas modified with a turbo than Mazda even built
323
> B6t's.
>
> Bob
> 88 323 GTX
> 90 Turbo Miata
>
> ----- Original Message -----
> From: "Fred H" <_supa_fly_@y...>
> To: <323gtx@yahoogroups.com>
> Sent: Tuesday, April 08, 2003 7:35 PM
> Subject: [323GTX] Cams?
>
>
> > I work for a major distributor of aftermarket parts up here in
> > Canada, and one of the brands we carry is Cat Cams. I believe we are
> > the only distributor of Cat Cams in Canada, actually. They are out
> > of Amsterdam, and are a well respected company and make great quality
> > products. I was taking a look at the application sheets today, and I
> > noticed that they make nothing for the B series engines, let alone
> > the B6T. No miata cams either.
> >
> > I have the ability to get a set of cams made for our B6T engines.
> > All I need to know is if there is a demand for this product, how many
> > people would buy them (pending dyno testing, of course) and what
> > specs you guys think they should be, etc.
> >
> > What do you guys think of the stock B6T cams, and what do you think
> > can be done to improve upon them.
> >
> > I would need a set of cams to send off to Cat Cams so they could
> > examine them and decide how they can improve on them.
> >
> > What do you guys think?
> >
> > -Fred
> >
> > *1990 B6T Festiva
> >
> >
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