Good advice! Listen!
Calvin Grandy
Vermont
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> From: Jim Tyler <jtyler29@idt.net>
> To: 'datsun-roadsters@autox.team.net'
> Subject: RE: A nice offer from TWM induction
> Date: Friday, December 10, 1999 9:11 PM
>
> I'll make you you the same offer on the following parts which you need
about as much as the
> TWM airbox:
>
> Full race cam.
> Maximally ported intake.
> Chrome 4" inch exhaust tip
> Solid core spark plug wires
> 50 mm solexes
> Titanium valves w/8mm stems (those big ones are TOO restrictive for
street use!)
>
> Get my point? Actually Daniel I am not being sarcastic, I'm just thought
I would to help you avoid wasting a bunch of money. As nice as the offer
is from TWM, it simply doesn't mean much for street use.
>
> Best case, after spending a small fortune in dynoing, you may add a few
HP at redline.
>
> You see the first thing you are going to find is that at certain RPM's
your mixture and or timing
> is less than optimal. This will hurt you much worse than the airbox will
help.
> Then you are going to need to work out a solution/compromise across the
RPM band. That will involve several runs, a bunch of jet swapping, and
timing light work (by the way you are on the clock...) maybe recurving
(again) or eliminating the distributor. Oh yes, Fuel delivery issues?
>
> You have to do all this since it makes no sense to try to optimize an
airbox on a mis-tuned engine,
> right?
>
> Now you start swapping velocity stacks, boxes, and filters. Did any of
this change your mixture/timing requirements? Are you detonating at
different loads/throttle positions?
> maybe. Go back to the above.
>
> Get my point?
>
> TWM makes nice stuff, but it isn't a magic bullet. If you are going to
sqeeze more HP out of
> your Solex 2L, buy a jet assortment and a choke assortment and learn how
to tune the carbs carefully. You can pick up real power this way. The
factory air cleaner will work fine.
>
> Jim
>
>
>
> ----------
> From: Daniel Neuman[SMTP:dneuman@stars.sfsu.edu]
> Sent: Thursday, December 09, 1999 11:58 AM
> To: datsun-roadsters@autox.team.net
> Subject: A nice offer from TWM induction
>
> Hello All,
>
> Have been communicating with TWM induction about the cold air box and
> velocity stacks they make. TWM are the people that make fuel injection
setup's
> for Mikuni/Solex's. They have offered to 'loan' me a cold airbox and
some
> velocity stacks to see which combo works best on the roadster. I would
have
> to have the car dyno'd though to really see the difference. If I find a
combo
> that works well I buy it and return the rest and if I don't find a good
combo
> I return everything back to them with 'no charge'
> I say 'no charge' cause I don't know what it will cost to have the
> car dyno'd.. Actually I know nothing about haveing a car dyno'd... I
would
> probably need to do at least four runs. ONe with the stock setup and one
> each for small medium and large velocity stacks. Does anyone know how
much
> this might cost me??
> Does anyone know of a place in the bay area that does this kind of
> thing??
> Thanks,
> DAniel 69 2000
> SF CA
>
>
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