Im buying all my parts for my 393w stroker, and im thinking about going supercharged. Do you guys know where i can find a single carb blower for a 351w. A twin screw would be nice. Its gonna be a street driven car that i will take to the track often. Its gonna go in my 66 coupe.

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Under Construction 66 Coupe - - -
306, 10.2:1, 66 289 heads 1.84/1.50, mild port work, comp cams 270H cam, Performer manifold, Holley 700cfm double pumper, tri-y headers, 2.5 dual exaust w/flows, centerforce dual friction, 8" 2.79 gears, w/mini spool

quote:

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Originally posted by Fstln69:
If i was you i would look into the centrifugal blowers.Vortech makes a blow thru carb setup for a sbf and it would be under the hood..

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http://www.blowerdriveservice.com/pcar31.jpg

http://www.blowerdriveservice.com/manifolds_manifolds.html
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SCOOP

oddly obsessed with big scoops on little Mustangs

65 coupe,351w,C4,Big Boss 429 hood scoop,8" 3.40 TracLoc.

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quote:

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Originally posted by Dynoram:
tuning a centrifugal blower is a bitch when carbuerated and doesnt make neer the power a roots style could potentially make. BDS makes killer huffers.

[This message has been edited by Dynoram (edited 06-13-2004).]

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Well i will disagree with that.A carbed blow thru deal is producing 8.50 ets on small tires and stock suspensions.The nice thing about centrifugal's is you can easily intercool them and run more boost,Roots is OLD school centrifugals are the future.
Dennis
also here is a great site that will help
http://www.boards2go.com/boards/board.cgi?&user=huntracers

Roots blowers put out a relatively constant level of boost from a very low to high rpm, so it's not that difficult to tune the carb in right. A centrifugal doesn't make ANY boost down low, then makes more as the engine revs. It's tough for a carb to keep a decent fuel curve through this RANGE of boost pressures and rpm. It takes a lot of research and tuning to do it right. Most people end up buying an expensive carb specifically for this application. I forget what company is popular right now... but I'm sure someone at a blowthru carb site could help you out.

Here's one... It's an email list with member access to archives, etc.

http://sports.groups.yahoo.com/group/BLOWTHRU/

Good Luck!

Umm, no. Centrifugal is also very old school. As are axial and
intermeshing screw. For instance, the screw compressor patent was issued
in 1878 (to German Heinrich Krigar) though it wasn't until the 1930's that
Alf Lysholm developed it for gas and steam turbine use. Lysholm was chief
engineer at Swedish steam turbine manufacturer Ljungstroms Angturbin which
later (1951) became Svenska Rotor Maskiner (SRM). Initial applications were
primarily industrial: air compressors, refrigeration, air-conditioning, etc.
The earliest I can find reference to automobile applications was in 1965,
when British engineer Mark Ransome proposed using one on a Formula One engine.
That proposal insired the development of the PSI drag race supercharger in
the United States. SRM appears to still control most of the manufacturing
licences with SRM, Opcon, Sprintex, IHI, and PSI all making screw type
superchargers.

> anything can be a PITA if you let it

But some things are inherently more difficult due to the nature of
the physics. A positive displacement supercharger such as a Roots
or Lysholm sweeps out a fixed amount of flow with each revolution
of the impellor, so flow varies linearly (to a first approximation)
with impellor RPM. Double the speed and you get double the flow.
Centrifugal (and axial flow such as the Latham) superchargers produce
flow that is proportional to the square of the impellor speed. Double
the speed and you'll quadrouple the flow. That may seem like a good
thing (more flow = more boost) but it's not necessarily. The non-linear
flow curve limits the working range of a centrifugal supercharger. Gear
one to produce meaningful boost at 2000 RPM and you'll over-boost the
engine at 6000 RPM, unless the static compression ratio is very low.
The linear output of positive displacement blowers allows them to
operate over a wider RPM range without over-boosting and makes them
much less sensitive to tuning errors.

Anyone know of any company that makes this?, it would be very interesting to investigate.

Paul

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1970 Grande
H code 351W FMX

quote:

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Originally posted by Daniel Jones:
Kenne Bell does a Lysholm for the fuel injected 5.0L and 351W engines.

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An intermeshing screw supercharger, named after Alf Lysholm, the Swedish
engineer who developed the idea gas and steam turbine use. The screw
compressor uses two helical rotors, one male and one female. The male
and female rotors intermesh but do not touch. As you move down the
rotors, the pitch gets closer together so the trapped volume of air is
compressed. This makes the Lysholm supercharger positive displacement
and a true compressor. The Lysholm design is very efficient at producing
boost, much more so than a Roots, but tends to consume power even when not
producing boost because the air is still being compressed (work is being
done, unlike a Roots or centrifugal design). There are bypass arrangements
that can be implemented to get around this, however.

I also made mention of a Latham supercharger. A Latham is an axial flow
compressor, very similar to the compressor stages of an axial flow
turbojet. Latham built and marketed a supercharger based upon this
approach in the early 1960's.

Paul

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1970 Grande
H code 351W FMX

1998 SVT Mustang Cobra
Bright Atlantic Blue