the reason i was thinking of running a custom intake was to get better
fuel distribution to the cilynders. i have thought of doing the 425
intake instead.

the thing with rochesters is it should work right for the most part
because of the way the secondaries work - they'll open when i start to
get boost, so i just overjet them and keep the primaries where they
are. or another alternative is to throw some injectors in the system
and a simple pressure activated driver system - not ideal, but
probably good enough. i know plenty of blow through people who are
doing great with their systems. and draw through with twins just
seems too precarious - especially since i don't have too much room.
and talk about the carbs freezing...

and i don't think i'm ready to go to efi yet. i'd need a special
computer (i'd probably go megasquirt - and then i'm committing to a
ton of fab work that i don't know much about before i can fire the
engine up).



--- In big-cube-cady@y..., "Scott Hatch" <shatch26@h...> wrote:
> under boost? why would you need a good intake under boost I'm just
running a
> stock 425 cast iron single plane with the center cut out . and what
are you
> thinking of running that has carbs on a intake and boost if it is
blow thru
> I would not do it . it is to hard to get the fuel curve right, a
carb meters
> fuel by volume i.e. more air more fuel but a blow thru system you
have a
> denity change so the same volume of air goes thru the carb but the
amount of
> air in that volume is higher so you have more air but not more fuel
and if
> you jet the carb up then you have a way rich carb in non-boost times
. seen
> lots of people try and it does not work.
> -----Original Message-----
> From: pipejw02 <jonpiper@m...>
> To: big-cube-cady@y... <big-cube-cady@y...>
> Date: Friday, December 07, 2001 11:00 PM
> Subject: [big-cube-cady] Re: caddy with a blower
>
>
> >any idea what the problem with the holleys was - i was thinking of
> >either using holleys or rochesters.
> >what do you think was causing the roughness? just the port match?
> >here's what i was thinking i'd do for my set up: a rectangular box
> >under the carbs. run either square or probably circular turbes to
the
> >heads. i was thinking i'd do my best to match the areas of the
tubes
> >and the head ports, then pound the tubes under heat to the right
shape
> >at the end before i welded the flanges to them. i don't know -
sounds
> >great in theory, but you're the only person i know who's ever
worked
> >with it. let me know what you think. worth the trouble? i think
it
> >would help some with air flow and definitely fuel distribution
under
> >boost.
> >
> >thanks, jon
> >
> >
> >--- In big-cube-cady@y..., "Scott Hatch" <shatch26@h...> wrote:
> >> the dual quad intake runs ok at wot but drivibilty was a little
> >rough the
> >> holleys did not pan out well but the edebrock 500 cfm carbs did .
> >the carbs
> >> are centered over the cyl . distribution was good but I think the
> >port
> >> mismatch was keeping it from living up to its full potential .
> >> -----Original Message-----
> >> From: pipejw02 <jonpiper@m...>
> >> To: big-cube-cady@y... <big-cube-cady@y...>
> >> Date: Thursday, December 06, 2001 3:21 PM
> >> Subject: [big-cube-cady] Re: caddy with a blower
> >>
> >>
> >> >wow... cool.
> >> >
> >> >speaking of the dual quad (are you talking about on your ustom
> >> >manifold?) - how does that custom manifold work. i know you
said
> >on
> >> >you site that it was having some problems, and i wondered if
those
> >> >were carb bormblems rather than manifold problems, because i
can't
> >> >think of a reason for that manifold to have many problems (maybe
> >> >because the inlet to the runners is perpendicular t othe carb
> >barrels
> >> >- perhaps positioning them under the barrels would help, but
> >probably
> >> >not much). i've been thinking of making a similar manifold
myself
> >> >,and wondered what your experience with that other one has been
> >like.
> >> >
> >> >thanks, jon (sorry about all the typos - i'm away from m
ycomputer
> >and
> >> >i always have trouble with keyboards other than the one i've
gotten
> >> >used to :)
> >> >
> >> >
> >> >--- In big-cube-cady@y..., "Scott Hatch" <shatch26@h...> wrote:
> >> >> the lower end of this motor has seen 600 hp and 800ft lbs with
> >the
> >> >duel quad
> >> >> and nos and had no problems .
> >> >> -----Original Message-----
> >> >> From: pipejw02 <jonpiper@m...>
> >> >> To: big-cube-cady@y... <big-cube-cady@y...>
> >> >> Date: Wednesday, December 05, 2001 7:44 PM
> >> >> Subject: [big-cube-cady] Re: caddy with a blower
> >> >>
> >> >>
> >> >> >sounds excellent. you're going to try NOS on top of that
with
> >stock
> >> >> >pistons, etc? sounds like a recipe for disaster... but i
guess
> >the
> >> >> >NOS will cool it all down. hope it lasts for you.
> >> >> >
> >> >> >
> >> >> >--- In big-cube-cady@y..., "Scott Hatch" <shatch26@h...>
wrote:
> >> >> >> runs good should be like 500 hp at this boost . i am going
for
> >8 lbs
> >> >> >up here
> >> >> >> which is like 6 lbs at sea level . the motor is all stock
with
> >a big
> >> >> >cam .
> >> >> >> it is a 74, 8 to 1 motor cleaned up but stock ,no port
work,
> >stock
> >> >> >valves
> >> >> >> stock retainers good springs set at 115 lbs seat to deal
with
> >the
> >> >> >boost ,
> >> >> >> stock rockers, stock pistons, stock rod bolts, stock 425
carb
> >intake
> >> >> >with
> >> >> >> the center cut out, i should get like 580 hp at 8 lbs and
715
> >with
> >> >> >the nos
> >> >> >> on . but the nos is next week this week i am still working
on
> >the
> >> >> >tuning.
> >> >> >> latter
> >> >> >> -----Original Message-----
> >> >> >> From: pipejw02 <jonpiper@m...>
> >> >> >> To: big-cube-cady@y... <big-cube-cady@y...>
> >> >> >> Date: Wednesday, December 05, 2001 5:26 PM
> >> >> >> Subject: [big-cube-cady] Re: caddy with a blower
> >> >> >>
> >> >> >>
> >> >> >> >so, you're running 6 psi now, eh? how much better does
that
> >feel
> >> >> >than
> >> >> >> >before boost? what do you have in/on the engine?
> >> >> >> >
> >> >> >> >i'm working (well, getting parts) on a twin turbo caddy
472
> >(i'll
> >> >> >> >probably upgrade to a 500 someday, which should drop right
in
> >when
> >> >> >i'm
> >> >> >> >ready) - just want to get a sense of how it feels :) keep
me
> >> >> >> >motivated...
> >> >> >> >
> >> >> >> >
> >> >> >> >
> >> >> >> >--- In big-cube-cady@y..., "Scott Hatch" <shatch26@h...>
> >wrote:
> >> >> >> >> i am runing a 500 cid motor with a 174 mini blower i am
now
> >at 6
> >> >> >lbs
> >> >> >> >of boost . if you want to see it it is at
> >> >> >> >http://albums.photopoint.com/j/AlbumList?u=977248 . if you
> >have
> >> >> >> >questions feel free to post them. latter caddycarlo
> >> >> >> >
> >> >> >> >
> >> >> >> >
> >> >> >> >To unsubscribe from this group, send an email to:
> >> >> >> >big-cube-cady-unsubscribe@y...
> >> >> >> >
> >> >> >> >
> >> >> >> >
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> >> >> >http://docs.yahoo.com/info/terms/
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> >> >> >> >
> >> >> >> >
> >> >> >
> >> >> >
> >> >> >
> >> >> >To unsubscribe from this group, send an email to:
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> >> >> >
> >> >> >
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> >> >
> >> >
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