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Old 01-14-2005, 07:13 AM
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advice,stall n gears

I am looking for some advice for my chevelle,these are the specs,what stall and gears would work best with this setup.The bottem end pretty much stock out of a 72 chevelle SS.thanks

INTAKE:.
Dart aluminum single-plane Intake Manifold. This single-plane, air-gap
style manifolds has a raised water crossover to keep incoming air cold
and has optimized intake-runner cross sections to maintain high
mixture velocity while the extended runner dividers equalize the port
lengths. Dart also incorporated integral nitrous bosses on this
manifolds, for those wanting even more power. Unique single plane
plenum design uses airflow technology developed for NASCAR and NHRA
engines.

CARBURETOR:.
Barry Grant 750 Speed Demon. These are the BEST carburatiors on the
market. Barry Grant dedicates himself in making only the best fuel
equipment. Die cast concentric venture and specially sculpted air
entries work with the carburetors billet aluminum metering block and
large float bowl to provide the best air and fuel flow possible.
Comes with electric choke, vacuum advance, see through site bowls for
hassle free float adjustment.

VALVE TRAIN:.
1.6 ratio CNC machined extruded aluminum roller rockers with needle
bearing fulcrums, super light, super accurate and super stiff.
Proform die-cast aluminum lightweight tall valve covers. They come
with internal oil drippers, OEM style baffles and classic Chevrolet
red logos. they will not scratch or be harmed by chemicals. These
valve covers will not leak!
Comptition Magnum Cam with matched hydraulic lifters.Duration @.050"
Int./Exh.=230º/230º, Lift Int./Exh 480º/480º

HEADS:.
Professionally built Pro-Action, Cast Iron, Cylinder Heads. Angled
Plug for better spark location, 64cc combustion chamber – 220 Intake
Runners, 2.02 exhaust & 1.6 intake Manley stainless valves, 3 angle
valve job. Long runners and heart shaped combustion chambers for
create great flow numbers. These are the best flowing cast iron heads
for using with Flat-Top Pistons on the market!! These heads are
manifactured by pro-topline located in New Zeland. They have been
buling championship motors your years.

They include...
phosphor bronze exhaust valve guides for superior heat dissipation
manganese bronze intake guides for longer life.
CompCams guide plates
7/16 ARP screw in rocker arm studs.

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Old 01-14-2005, 07:27 AM
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To properly suggest stall speed and rear gearing you would have to state what your intended use of the vehicle is. For example: Street only, street & strip, strip only.

Unless you are going to use on the strip only, I would suggest that you use a dual plane intake over the single plane you listed.

The 750 cfm carb would probably be too big for street only usage.

That cam requires a higher than stock stall and taller gearing. It doesn't really "come on" until 2500 RPM.

220 intake runners on an otherwise mild engine will give less than satisfactory bottom end but will perform well at higher RPM's.

Need more info.
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Old 01-14-2005, 07:30 AM
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We're still going to need a little more info. Is this car being built for the street or will it see a lot of drag strip duty? Also which automatic are you using and how has it been prepared?

Centerline
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Old 01-14-2005, 08:13 AM
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These guys are right on the dual plane intake, you'll like it much more.

I've got a 71 Chevelle with a 355, and Sportsman II heads, fairly agressive lunati, and an x-celerator single plane, but soon will be a crosswind (rpm air gap clone).

Sparing the rest of the details, and this is totally dependent on application/intended use, I have a Hughes 3500 stall, and 3.55 Richmonds, and Eaton Posi, and love it.

Feel free to pm me if you want to talk about different stuff I've tried on my Chevelle.
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Old 01-14-2005, 01:33 PM
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it will mostly be street,but it will be at the track on the weekends.
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Old 01-14-2005, 02:11 PM
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I might have missed it, but how many cubic inches is the motor?

Adam
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Old 01-14-2005, 04:04 PM
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Best advice: determine vehicle weight, and intended rear end gear ratio, and CALL TCI.

Besides that recommendation, I can say that I have a similar setup in my vehicle (2900 lbs) with upgraded vortec heads, the same Magnum 280H cam (that is the cam you have, right?)
and I'm using a TCI dual-pattern converter
part number TCI-240900 and flexplate TCI-399273.

Again. BEST RECOMMENDATION: contact a torque converter manufacturer and go with their advice.

Good luck

the blonde weasel
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Old 01-14-2005, 07:36 PM
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Since you have a dual-action street/strip vehicle go mid route with 3.42-3.55:1 gears and a 2500 small diameter stall.
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