Mike,
On my 66 2" will slip right through the driver's side - 2.5" needs a bit of
flattening. I was down at Jim Sloan's race barn, and we were looking at a
later frame and it appears they made the openings smaller on the later cars.
I've had discussions with a local hot rod guru ( he's been building race
proven motors & cars for many moons), as well as the folks at Clifford
performance and Headers by Ed with the result that I'm convinced of the
proper sizing for the "R" with the V6 - 1-5/8" primary tubes, 3 into 1,
2.25" collector, reduced to 2" duals to the rear, just ahead of the axle,
where they will join in a flowed "Y" into a single 2" and out a 2"x17"
Supertrapp. I was thinking of going dual out the back, but the same guys I
talked with said by the time the gases have travel that far, they will have
cooled and condensed enough for the low-restriction 'trapp on a single pipe
to do it.. I'm going to make the "Y" using my tubing notcher.
All three sources warned against going too large - too much volume reducing
bottom end power. Funny thing was, when I was at the local shop having the
tailpipe bent up, there was a kid in there asking about a 3.5" exhaust for
his rusty, ricey Civic ;>
I haven't modfied the passenger side of the x yet, because in need the
header collectors to see where the exhaust can be routed. I'm STILL waiting
for the collectors I ordered back on Jan 28th from Clifford. Finally got to
the bottom of it today - my order was processed and billed to my cc, but the
butthead in purchasing never ordered them from a sub-supplier. Took asking
for the owner to get it resolved - he's having the shop guys cut the
collectors off a set of heeader they have in stock and is FEDEXing them to
me so I'll have em for this weekend.
Mark Sedlack
OROC
Cuyahoga Falls OH
66 1600 http://home.neo.rr.com/mark2000/images/datsun1600/
77 280Z http://home.neo.rr.com/mark2000/images/datsun1600/Z/Z.htm
----- Original Message -----
From: "datsunmike" <datsunmike@nyc.rr.com>
To: "Mark Sedlack" <msedlack@neo.rr.com>; <Geegc@aol.com>;
<datsun-roadsters@autox.team.net>
Sent: Thursday, March 14, 2002 7:51 PM
Subject: Re: Exhaust systems Q
> Mark,
>
> I saw a car where the exhaust openings in the frame were opened up and a
> pretty large diameter pipe was welded to the frame to keep it strong and a
> 2" pipe went through without flattening.
>
> With your skills a mod like that is a piece of cake.
>
> Mike
>
> ----- Original Message -----
> From: "Mark Sedlack" <msedlack@neo.rr.com>
> To: <Geegc@aol.com>; <datsun-roadsters@autox.team.net>
> Sent: Thursday, March 14, 2002 1:42 PM
> Subject: Re: Exhaust systems Q
>
>
> > I've been playing around with exhaust options for our 66 engine swap
> > project, and am planning on 2" pipe. I had a 2" tailpipe with the
"hump"
> > over the axle bent up and it fits fine using the stock hanger locations.
> 2"
> > will also fit through the x-member, but it is very tight. Too tight to
> > allow the movement the engine would impart.
> >
> > I plan on rigidizing ( is that a word?) the exhaust aft of the
collectors,
> > and using a pair of EPI stainless steel flex couplers to connect the
> > collectors to the exhaust tubes. I'm using a pair of flex couplings
since
> > the V6 will have duals back to just ahead of the axle - I'll be
modifiying
> > the passenger side of the x with the same through tubes as on the
> drivers's
> > side -
> >
> > A single flex coupler and 2" pipe back should work very well on your 66.
> By
> > the way, JCWhitney carries the EPI's now and they're quite a bit less in
> > price than Summit, etc.
> >
> > Mark Sedlack
> > OROC
> > Cuyahoga Falls OH
> > 66 1600 http://home.neo.rr.com/mark2000/images/datsun1600/
> > 77 280Z http://home.neo.rr.com/mark2000/images/datsun1600/Z/Z.htm
> >
> >
> > ----- Original Message -----
> > From: <Geegc@aol.com>
> > To: <datsun-roadsters@autox.team.net>
> > Sent: Thursday, March 14, 2002 11:42 AM
> > Subject: Exhaust systems Q
> >
> >
> > > My 1966 1600's new fancy headers end in a 2 inch pipe, and the 20 year
> old
> > exhaust pipe is only 1.5 inches. I can get a reducer (although a flex
> > coupling reducer will be tough to find), but I wonder if anyone else
(what
> a
> > question with this group) has run 2 inches all the way on an early 1600
> and
> > what clearance issues have come up.
> > >
> > > Thanks
> > >
> > > Gary C
> > >
> > > /// datsun-roadsters@autox.team.net mailing list
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> > > /// http://www.team.net/cgi-bin/majorcool
> > > /// Send list postings to datsun-roadsters@autox.team.net
> >
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