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@...>
To: big-cube-cady@yahoogroups.com <big-cube-cady@yahoogroups.com>
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:
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>> >> >> >
>> >> >> >
>> >> >> >
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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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