M.Dowdell - Content

With the desire to build more torque from the same small block package while maintaining longevity, driveability and much of the already purchased performance items, Brett took the stroker aproach with a newer style roller block. With the limited room between the strut towers and hood, options were limited and had to be selected with care. Not only did it build more torque but the increased flow and improved geometry gave it more horsepower to boot.

Short Block Specs:
Block:	85 Ford 302	Type:	Cast Iron
Cylinders:	8	Displacement:	326.7
Bore:	4.000"	Deck Height:	8.206
Stroke:	3.25"	Bore/Stroke Ratio:	1.231
Rod Length:	5.400"	Rod/Stroke Ratio:	1.662
Pistons:	Keith Black	Piston Type:	Hyperuetectic
Piston Rings:	3 standard tension	Piston Top:	No Coating
Timing Setup:	True Double Roller	Timing Options:	Roller Cam Button
Dampner:		Balancing:	Internal

Head Specs:
Head:	Edelbrock #60259 Performer RPM	Type:	Aluminum
Valve Dia. In.:	2.02"	Valve Dia. Ex.:	1.6"
Avg. Port Dia. In.:	1.6"	Avg. Port Dia. Ex.:	1.2"
Port Length In.:	5"	Port Length Ex.:	3"
Port Flow Coef. In.:	.45	Port Flow Coef. Ex.:	.50
Comp. Ratio:	10:1	Burn Rating:	Typical

Cam Specs:
Cam:	Ultradyne #284/284HR12	Type:	Hydraulic Roller
Centerline In. ATDC:	112 deg.	Centerline Ex. ATDC:	112 deg.
Dur. @ .050 In:	218	Dur. @ .050 Ex:	218
Open @ .050 In. BTDC:	-3	Open @ .050 Ex. BTDC:	41
Close @ .050 In. ABDC:	41	Close @ .050 Ex. ABDC:	-3
Max. Lobe Lift In.:	.3281	Max. Lobe Lift Ex.:	.3281
Rockers:	Crane	Rocker Type:	Aluminum Roller
Rocker Ratio In.:	1.7	Rocker Ratio Ex.	1.7
Gross Valve Lift In.:	.558	Gross Valve Lift Ex.:	.558
Total Cam Advance:	0 deg	Lobe Sepparation:	112
Lifters:	Retro Roller	Pushrods:	7.35"



Intake Specs:
Intake:	Weiand Action Plus #8011	Type:	Aluminum
Intake Heat:	Production (full)	Plenum:	Dual Plane - 1/4" open isolator
Runner Dia.:	1.6"	Runner Style:	Straight- No Taper
Runner Length:	6"	Runner Flow Coef.:	1.5

Carb Specs:
Carb:	Holley 4150 #4777	Type:	Double Pumper
CFM:	650	Air Cleaner CFM:	800
Power Valve:	6.5	Idle:	1000 rpm
Pri. Jets:	69	Sec. Jets:	74

Exhaust Specs:
Exhaust:	Headman Headers	Type:	Full Length
Muffler:	Flowmaster	Design:	50 Series
Inside Dia.:	1.625"	Length:	40"
Runner Flow Coef.:	1	CFM	600
Collector Length:	8	Collector Style:	Simple
Collector Size:	3"	Exhaust Size	2.5"

Drivetrain Specs:
Transmission:	C4	Type:	Auto
Torque Converter:	Stock	Stall:	1500rpm
Trans Ratio:	1st=2.46, 2nd=1.46, 3rd=1	Mods:	Shift Kit
Driveline:	Stock	Rear End:	Ford 8.5"
Gear Ratio:	3.0	Diff.:	Open
Front Brakes:	Disk	Rear Brakes:	Drum

Tire Specs:
Front Rim Size:	14"x8"	Rear Rim Size	14"x8"
Front Rim Offset:	3.75"	Rear Rim Offset:	3.75"
Front Tire Size:		Rear Tire Size:

Additional Specs:
Cooling Fan:	Electric	Water Pump & Drive:	Production Style
Ignition:		Ign. Type:	Petronix Pointless Pickup
Peak RPM:	6000 - high piston speed	Maximim Flow	614 CFM @ 100% VE
Vehicle Weight:	3800 lbs	Aero Dynamic Drag

After plugging in all the data, the 327 rolls out 372 ft lbs of torque at 4500 rpm and 354 hp at 5500 rpm. Looking at the graph you can see how smooth the power band is, a direct relation to its ideal rod ratio.


Engine_RPM     1500    2000    2500    3000    3500    4000    4500    5000    5500    6000    
Brk_Tq         258     279     303     313     335     364     372     361     338     293     
Brake_HP       73.6    106     144     179     224     277     319     344     354     335     
Exh_Pres       0.0     0.0     0.1     0.1     0.2     0.3     0.5     0.6     0.6     0.7     
Int_Vac        0.1     0.1     0.2     0.3     0.5     0.8     1.1     1.3     1.6     1.6     
Vol_Eff        68.0    72.5    78.0    80.3    86.0    93.7    99.3    98.5    96.6    91.3    
Actual_CFM     96.4    137     184     228     285     354     422     465     503     518     
Fuel_Flow      33.67   47.92   64.4    79.5    99.4    124     148     163     176     181     
Nitrous        0.00    0.00    0.00    0.00    0.00    0.00    0.00    0.00    0.00    0.00    
Ntrs_Fuel      0.00    0.00    0.00    0.00    0.00    0.00    0.00    0.00    0.00    0.00    
BMEP           119     129     140     144     155     168     172     167     156     135     
A/F_Mxtr_Qlty  92.7    96.5    99.2    100.0   100.0   100.0   100.0   100.0   100.0   100.0   
BSFC           0.457   0.452   0.446   0.445   0.445   0.446   0.463   0.473   0.495   0.540   
Thermal_Eff    32.73   33.35   33.90   34.29   34.44   34.39   33.44   33.23   32.46   31.00   
IMEP           133     144     158     164     177     192     198     195     187     169     
Frctn_Tq       29.96   34.17   38.50   42.95   47.53   52.2    57.1    62.1    67.2    72.5    
Frctn_HP       8.56    13.01   18.32   24.53   31.68   39.79   48.92   59.1    70.4    82.8    
FMEP           13.83   15.77   17.77   19.82   21.94   24.11   26.35   28.65   31.01   33.44   
Mech_Eff       89.6    89.1    88.7    87.9    87.6    87.5    86.7    85.3    83.4    80.2    
Motoring_HP    10.18   16.46   22.89   28.39   35.22   45.20   63.9    77.8    98.3    124     
Pumpng_Work    -1.62   -3.45   -4.56   -3.86   -3.54   -5.41   -15.01  -18.73  -27.98  -41.43  
Residual_Exh   11.9    7.9     5.6     7.1     6.2     4.5     2.3     2.3     2.2     2.6     
Shrt_Circuit   0.0     0.0     0.0     0.0     0.0     0.0     0.3     0.2     0.4     0.1     
Exh_Temp       1165    1242    1300    1304    1298    1322    1362    1347    1338    1339    
Mx_Cyl_Pres    741     788     843     872     931     1011    1061    1050    1025    961     
Mx_Cyl_Tmp     4194    4356    4463    4396    4434    4493    4572    4562    4553    4465    
In_Port_Tmp    167     158     149     145     136     128     124     120     117     117     
Piston_Spd     813     1083    1354    1625    1896    2167    2438    2708    2979    3250    
Piston_Gs_@_TD 130     240     370     540     730     960     1210    1500    1810    2160    
Coolant_HP     39.19   50.9    61.9    71.9    82.9    94.9    109     120     134     145     
Blow_By        3.7     3.9     4.1     4.3     4.6     5.0     5.2     5.1     5.0     4.7     
In_Tun_Pres    0.0     0.0     0.1     0.6     1.1     2.2     3.2     3.8     4.3     4.3     
Avg_In_Vel     85      113     141     169     197     226     254     282     310     339     
Avg_Ex_Vel     99      132     165     198     230     263     296     329     362     395     
Mach_#         0.117   0.157   0.196   0.235   0.274   0.313   0.352   0.391   0.431   0.470   
Act_In_FlowAre 100.0   100.0   100.0   100.0   100.0   100.0   100.0   100.0   100.0   100.0   
Act_Ex_FlowAre 100.0   100.0   100.0   100.0   100.0   100.0   100.0   100.0   100.0   100.0   
Valve_Toss                                                                             PmpUp   
Knock_Index    2.1     1.9     1.8     1.7     1.7     1.9     1.9     1.8     1.6     1.3     
Spark_Advnc    30.2    31.0    31.8    33.9    34.4    34.3    34.3    35.3    36.3    37.8

Published on: 2005-06-11 (285 reads)

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