Hi Craig,
Here are the basic spec's for the new
motor, its built for driving to Solo II/Open
track events and running in CP. No real secrets
just a really detail oriented shop, and a really
good set of heads for the application:
"Stroked" 289 Windsor (4.03" bore X 3"
stroke = 306 ci)
CNC ported Canfeild Aluminum Heads. 2.08"
Intake/1.6" Exhaust valves
Out-of-the-box flow:(@ 28" of Water):
Valve Lift Intake CFM Exhaust CFM
0.10" 61.82 57.33
0.20" 126.31 103.58
0.30" 185.46 150.46
0.40" 234.38 178.97
0.50" 260.62 192.27
0.60" 280.64 199.24
0.70" 293.54 202.09
0.80" 308.66 203.36
10.85:1 Static Compression
4340 Steel Lightweight Eagle Crank (43 Lbs. Before
balancing, which required removal of nearly 0.25"
from the OD of each counterweight).
17 LBS Aluminum Flywheel
4340 Steel Eagle Connecting Rods
Wisco Forged Pistons
Cam (Mech/Flat Tapet):
Intake Exhaust
Lift: 0.541" 0.522"
Duration (Advertized):
2880 2840
Duration (@ 0.050" lift):
2420 2460
Canton Main Cap Stud Girdle & Windage Tray
Canton 9 Quart Road Race Oil Pan
Edelbrock Performer RPM Air Gap Intake
Holley 780 CFM Vacuum Secondary Carb
Dual 2 1/2" Exhaust with 2 chamber Flowmaster
Mufflers
Hooker Headers: 1.75" Primary tube, 3" Collectors.
At 06:09 PM 1/4/03 -0800, you wrote:
>Hi Dave,
>
>What are you running in that 306? The compression must be pretty low to
>be able to use pump gas. I'm also running a 306 in a '66 GT350 in
>Southern California. I haven't put the car on a chassis dyno, but it put
>out 425 on the engine dyno. I'd say you are getting more than that at
>the flywheel.
>
>306 ci
>'69 Windsor head (iron)
>1.94 intake
>1.64 exhaust (I think)
>Dual plane intake
>700 cfm carb
>Flat tappet solid lifters
>.550 lift cam
>285 advertised duration
>108 lobe center.
>
>torque=750@5000
>HP=425@7000
>
>You got any secrets?
>
>Craig Wright
>
>
>David R. Mapes wrote:
>
>>Hi Folks,
>>
>> Spent the day out a Maryland Performance
>>Center watching George fit a little tuning time
>>into running the business. This round of dyno
>>numbers for Ol'Beastly's new motor is looking up.
>>Keep in mind these are rear wheel numbers for a 306
>>on pump gas; I'll just touch on the highlights:
>>
>>RPM Ft/Lb HP
>>3394 305 197
>>4030 317 243
>>4955 318 300
>>5194 322 318 Torque "Peak"
>>6810 274 355 Hp Peak
>>
>>George thinks I may need to switch to a smaller
>>carb (running 780 CFM Holley with the choke horn
>>removed at the moment) as its lean and sluggish
>>below 3000 RPM, so we'll be trying a 650 HP series
>>carb on it next week some time. Today we went
>>down one jet size on each corner, reduced the
>>mechanical advance in the distributor and set the
>>timing with more initial advance, but still only
>>33 degrees total advance. Given the progress
>>a couple of simple tuning changes have made (we
>>picked up 49 HP), I can hardly wait to see where
>>the numbers end up. Now, if I could just get
>>George's undevided attention... Oh wait, I cant
>>afford that.
>>
>>All the Best! Dave ;^)
>>'66 Formula S Barracuda, CP/Vinatage (GoldFish)
>>'66 C code Mustang Coup, CP (Ol'Beastly)
>>'91 Sundance, HS (150,000 miles and counting)
>>'97 Cherokee
>>Lame Horse Racing
>>College Park, MD
>>http://www.erols.com/dmapes/
>>
All the Best! Dave ;^)
'66 Formula S Barracuda, CP/Vinatage (GoldFish)
'66 C code Mustang Coup, CP (Ol'Beastly)
'91 Sundance, HS (150,000 miles and counting)
'97 Cherokee
Lame Horse Racing
College Park, MD
http://www.erols.com/dmapes/
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