bill/liz wessel wrote:
>
> >Get one from TWM induction. They'll custom build to your specs.
> >
> >Rob Robinson
> >CSP 67 2000
>
> OK Rob, guess everyone but me was going to let you get away without adding
> some detail. I've been looking into the TWM air horns and ITG filters. For
> the 510 Mikunis, the setup is listed as 21-JC-50 backplate and JC 50/40
> element. My assumption is that you must have taken the JC-50 blank plate
> and cut it to fit the spacing of the mikunis on the 2000 manifold (much
> different from the 510?).
>
> I e-mailed TWM for a set on my SU'ed GP 1600 and they said they would
> prefer to work through a reseller such as Dean at Fairlady. So I called
> Dean (after seeing them pictured on his website) and he said that he'd had
> them make *one* set for a customer of his and they didn't fit properly.
> This was after he'd sent them a manifold and carb bodies. I was not
> impressed to hear this. He also said that the air horns were $52 apiece
> (TMW #2700-4050 2" high, and #2700-4075 for 3" high) and the filter setup
> was $145. Thus, it was all for around $250, and I might have to do some
> cutting and filing.
>
> I can't see spending that much. Pipercross socks (from Truechoice, $25 for
> the pair!) over the horns will do me just fine.
>
> PS. I'm talking roadrace only guys....look inside your stock airbox, see
> the curved horns leading to the su's? You've got to hand it to Datsun. For
> the street, stick with the stock airfilter setup. And keep a spare *new*
> paper filter for track events (dealer or roadster parts vendor item).
>
> Bill Wessel
> Madison, WI
> '68 1600, '69 2000,
> and GP race roadsters
Do not waste your money on those socks. They will hurt your performance.
Get separate K&N filters and the shorty horns that APT sells for your
SU's or for Mikuni's get the K&N filters and the shorty horns that TWM
sells. You can find good SU info at
http://www.jetlink.net/~okayfine/sutech.html
Also here is some info from an old post I sent to the 510 list.
Here are the part numbers for all the K&N filters for SU's (and some
other logical carbs). Part #'s with an S in the number are made in
England and differ from the US made ones generally available. They are
made from stainless steel rather than chromed steel and their sizes and
designs are also different. The English K&N's are available through APT
(others may also be offering them). The offset mount filters *raise* the
filter, IOW the mounting holes are located lower on the baseplate. Part
numbers ending in x indicate that the stock slide-in type air horn will
not work with that filter on that size carb.
Carb type Part number Size
SU (1.5"/38mm) 56-1390 6"x1.75"
Offset mount (apx 1" up) SD23-317 6"x2.5"
Offset mount (apx 1" up) SD23-318 6'x1.75"
Offset mount (apx 1" up) SD23-319 6'x3.25"
Centered mount SD3-317 6"x2.5"
Centered mount SD3-318 6"x1.75"
Centered mount SD3-319 6"x3.25"
Tapered cone filter SD36
Flat panel filter SP6292
SU (1.75"/44mm) 56-1400 6"x1.75"
Offset mount (apx 1" up) SD24-317 6"x2.5"
Offset mount (apx 1" up) SD24-318 6"x1.75"
Offset mount (apx 1" up) SD24-319 6"x3.25"
Centered mount SD4-317 6"x2.5"
Centered mount SD4-318 6"x1.75"
Centered mount SD4-319 6"x3.25"
early Z's 56-1410 6"x3.25"
Tapered cone filter SD38
Flat panel filter SP6293
SU (46mm) late 240/260 56-1430 6"x3.25"
Mikuni/Weber/SK/Dellortto
40/42mm 56-1310x 4.5"x7"x1.75"
56-1312Sx 4.5"x7"x1.75"
56-1313Sx 4.5"x7"x2"
56-1315Sx 4.5"x7"x2.5"
56-1330x 5.5"x9"x1.75"
56-1320 4.5"x7"x3.25"
56-1340 5.5"x9"x3.25"
56-1350 4.5"x7"x3.25"
56-1360 5.5"x9"x3.25"
Mikuni/Weber/SK/Dellortto
44/45/47/48mm 56-1310x 4.5"x7"x1.75"
56-1330x 5.5"x9"x1.75"
56-1342S 4.5"x7"x1.75"
56-1343S 4.5"x7"x2"
56-1345S 4.5"x7"x2.5"
56-1350 4.5"x7"x3.25"
56-1352S 5.5"x9"x1.75"
56-1355S 5.5"x9"x2.5"
56-1360 5.5"x9"x3.25"
56-1365S 4.5"x7"x4.5"
56-1366S 4.5"x7"x6"
56-1367S 5.5"x9"x4.5"
56-1368S 5.5"x9"x5.5"
56-1369S 5.5"x9"x6"
Weber/Mikuni 50mm 56-1710 4.5"x7"x3.25"
56-1720 5.5"x9"x3.25"
Weber DG series 56-1030 4.5"x7"x1.75"
56-1040 4.5"x7"x3.25"
w/vent hookup 56-1070 5.5"x9"x1.75"
w/vent hookup 56-1060 5.5"x9"x3.25"
DGV adaptor kit for round american type filters w/single center bolt
85-1061
Plenum adpator kit for 85-1061 for remote filter location
dual snorkel 85-8927 fits 2.5" hose or clamp-on filter
single snorkle 85-8921 fits 2.5" hose or clamp-on filter
low profile single 85-1060 fits 4" hose or clamp-on filter
APT can be reached at 1-800-278-3278 they are also the place that is
selling the billet air horns for the SU's that I designed (wish they
would have paid me for the designs) :-(
The English K&N's are much better quality than the American ones. The
American ones have problems with the chrome flaking off (I know of one
engine that "ate it" by eating the chrome) plus they often will not take
the horns or if they do they require modification. You need horns inside
the filter so this is significant. If the filter uses the same two bolts
to attach the top cover to the base plate as it uses to mount the base
plate to the carb, then the hrons will not fit, at least not without
some modifications.
After all that I realized I left out a few things :-)
You can also get "blank" filters, that is filters without any cutouts in
the baseplate. This allows you to alter the location of the filter. It
is a major pain to cut out the baseplate but if you want or need to do
this you can. The part numbers are:
Part number Size
SD-318B 5.875"x1.75"
SD-319 6"x3.25"
SP6290 - flat panel airbox type
You can also buy most of the English K&N components separately, ie
baseplate, top, spacers, element, etc.
--
Marc Sayer
Editor/Publisher
Z Car & Classic Datsun Magazine
http://zcarmag.com
Voice 541-726-6001
Fax 541-746-0863/726-6001
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