>> What if you got a 'better' cam grind that made power in a broader
>>powerband? I have been wondering this
>> why is the solex b cam the only one you ever hear about???
>>
>> Daniel 69 2000
>
>Give Nissan a little credit. They know how cams work too!
>The B cam is a very good compromise cam. Not too lumpy (rough idle),
>reasonable power band and torque. They did a pretty good job. The SU
>cam is smoother, however.
>
>If you go with a cam with much more lift and duration, you start
>to loose lower end performance (no torque, bogs as you give it
>gas etc.) You will pick up top end though once you get into
>the power band. If you get too radical without improving the
>whole engine, you will get a big soggy overcammed mess.
>
>If you want a SMOOTH street motor, don't even think about a cam
>significantly more radical than a B. You won't be happy.
>
>
>Jim Tyler
>Topless Datsun
Daniel,
There is no denying the "cool" factor when you raise the hood and half
the engine compartment is filled with those big dual throat carbs.
However, keep a couple of things in mind. Jim and Scott make good points
regarding cam choice, in particular. There ain't no such thing as a free
lunch, especially with cams. If you go with just the Solexs (probably if
you added the "B" cam, too) don't be surprised if your expectations for
increased performance aren't met by these changes alone. We've discussed
the cost difference using Webers, too, if I remember correctly.
If I were going to do the switch (on a primarily street driven car) it
would include (maybe) a slightly stouter cam than the "B" cam along with
some mild head work and a free flowing exhaust system. I'd then have this
combo jetted and tuned by someone who really knows what they're doing and
add a 4.11 LSD differential. It should be a real E-Ticket ride! You'd
probably spend $4K (semi-educated guess based on $1500 for the Solexs,
$700-$1K for the 4.11 LSD) to do this. You can probably get at least 80%
of the total performance increase just from going to the 4.11 gearing
with no other changes.
Bottom line, if it's what you want and if you can afford to do the whole
thing right, go for it. The one person you need to satisfy is yourself.
FWIW, Ron
________________
Ronnie Day
rday@cyberramp.net
Dallas/Ft. Worth
'71 510 2-dr (Prepared class autocrosser)
'73 510 2-dr (Street Toy)
|