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Old 11-06-2012, 11:23 AM
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327 sbc build HP & Tq estimate

327 .40 over sbc
ported and polished 291 cast heads 64cc
2.02, 1.5 steel rockers screw in studs
Flat Top Pistons
Lunati 60102 Cam
Advertised Duration (Int/Exh): 262/268
Duration @ .050 (Int/Exh): 219/227
Gross Valve Lift (Int/Exh): .468/.489
LSA/ICL: 112/108

670 Holley VS
edelbrock RPM intake manifold
HEI, mallory wires
Hooker Shorty Headers
Spintech Mufflers
March performance front runner serpentine system
anyone have a similar build or a dyno sim

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Old 11-06-2012, 01:31 PM
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Quote:
Originally Posted by chevyrally68 View Post
327 .40 over sbc
ported and polished 291 cast heads 64cc
2.02, 1.5 steel rockers screw in studs
Flat Top Pistons
Lunati 60102 Cam
Advertised Duration (Int/Exh): 262/268
Duration @ .050 (Int/Exh): 219/227
Gross Valve Lift (Int/Exh): .468/.489
LSA/ICL: 112/108
670 Holley VS
edelbrock RPM intake manifold
HEI, mallory wires
Hooker Shorty Headers
Spintech Mufflers
March performance front runner serpentine system
anyone have a similar build or a dyno sim
Great job on matching parts, except maybe for the shorty headers. Nothing wrong with 'em at lower R's, I just personally don't like 'em. I see 9.60:1 static compression ratio, 8.31:1 dynamic compression ratio. I would guesstimate 350 hp and 380 ft/lbs of torque, smooth idle and a very driveable motor on the street. 112 LSA will favor mid-range and upper rpm power over low rpm power.
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Old 11-06-2012, 02:54 PM
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I would guesstimate 350 hp and 380 ft/lbs of torque
I'll throw out a similar guess- 365hp/370tq
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Old 11-06-2012, 11:11 PM
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315 horses. 350 torque is my guess,now test it and see who wins the prise
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Old 11-07-2012, 04:54 AM
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I guess 300 and 330 ftlbs.

better heads and headers would help a lot.
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Old 11-07-2012, 05:58 PM
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Do me do me next! Lol......
350, flat tops
416 heads, very ported,heavily worked, 194/150
1094 head gaskets
60cc chambers
Performer rpm
Holley 750dp
Soon to be xe284
240/246
507/510
110lsa
Hei
Mid length Shorty headers, 3" to 3.5" spiral flow mufflers
......that's it
Any guesses?
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Old 11-07-2012, 06:41 PM
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bygddy,make a fun board,Ill guess 365 hp,385 torque without knowing the heads flow
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Old 11-07-2012, 07:28 PM
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Originally Posted by vinniekq2 View Post
bygddy,make a fun board,Ill guess 365 hp,385 torque without knowing the heads flow
What's a fun board??! Lol....and yah, assuming I followed f-birds tutorial accurately maybe he can chime in with an estimated ballpark for flow..
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Old 11-08-2012, 02:26 PM
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Quote:
Originally Posted by bygddy View Post
Do me do me next! Lol......
350, flat tops
416 heads, very ported,heavily worked, 194/150
1094 head gaskets
60cc chambers
Performer rpm
Holley 750dp
Soon to be xe284
240/246
507/510
110lsa
Hei
Mid length Shorty headers, 3" to 3.5" spiral flow mufflers
......that's it
Any guesses?
I see 10.7:1 SCR, 8.778:1 DCR. If I were going to try to get away with this combination, I'd build in a 0.035" squish. I see cylinder heads that will stall well before the cam wants to stop pulling. Cam makes power to 6500 in a well-prepared motor with the right heads, needs minimum 3000 stall converter and 4.something gears. I see a mismatch of parts. With the extreme velocity of the XE profile, I see lifters goin' bye-bye if everything is not just right.
http://www.crankshaftcoalition.com/w...ips_and_tricks
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Old 11-08-2012, 03:10 PM
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ok this could be fun..
30 over 350
flat top trw lt1 pistons (copies of the 1970 lt1) full floating pins, zero gap rings..
brodix track I heads ported 331cfm at 680 280cfm at 490 intake
exhaust 218cfm at 680 and 204cfm at 490 all tested at 28"
comp 292 magnum cam with roads type lifters(mine are cranes)
full roller s/s rockers with stock %
bowtie single plane port matched to gaskets..
piston .ooo1 down the bore
option of 750vac 2nd/ 750 d/p and 850dp.
dual stage n.o.s. both from one plate..
lunita crank and olover rods..
arp studs mains and heads, felpro head gaskets
windage tray and crank scraper
reg presure high volume oil pump..
built in 1991 waiting on first fire..
what it make, what should I change as I'll have to open it to get the moly lube off the cam.. and redo..

and yes it's sat for 22 years.. I know I know..
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Old 11-08-2012, 05:23 PM
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Quote:
Originally Posted by techinspector1 View Post
I see 10.7:1 SCR, 8.778:1 DCR. If I were going to try to get away with this combination, I'd build in a 0.035" squish. I see cylinder heads that will stall well before the cam wants to stop pulling. Cam makes power to 6500 in a well-prepared motor with the right heads, needs minimum 3000 stall converter and 4.something gears. I see a mismatch of parts. With the extreme velocity of the XE profile, I see lifters goin' bye-bye if everything is not just right.
http://www.crankshaftcoalition.com/w...ips_and_tricks
Other then the cam this is the combo I'm currently running, stock 4 valve relief flat tops, I believe 12cc dish? I have 411's, and a 3000 stall on my bench going in before cam swap....it pulls hard right to 6000 and doesn't run out of breath at all yet....with the XE I will be shifting it at 6500....! Lots of reading, then lots and lots of porting in the heads seems to work.....
Pistons are identical to these.....still would appreciate tech inspecters estimate on HP if this changes anything
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Old 05-09-2014, 12:15 PM
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Finally got on a set of ceramic long tube header and added 8 inch extensions at the collectors into 2.5 inch pipe with a cross over to cancel out that drone of the straight duals. Seems like lost some bottom end a little from changing from the shorty headers, but added a 1" 4 hole spacer under the 670 holley and it brought the bottom end back if better then previously with the shorties.
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Old 05-09-2014, 08:11 PM
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I doubt long tube headers lost any bottom end over shorties? Show me the dyno sheets.
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Old 05-10-2014, 11:30 AM
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RWHP???

My car/combo: Titanium/Gun Metal 1964 Corvette (as seen in the first 2 minutes of the 1964 Corvette restoration on the current season of Wheeler Dealers)

331 CI, pump-friendly 9.5:1 CR
K&N 14"x4" air filter, Corvette drop base and lid
Holley 600 dp, choke horn milled and blended, Primary - 69, Secondary – 74, Squirters - 21
1/2" Aluminum open spacer port matched to manifold, exterior polished
Edelbrock Performer RPM intake manifold, port matched, exterior polished with all extraneous castings and lettering removed
Homemade lifter valley splash shield to keep hot oil off manifold bottom
Manifold heat riser crossover blocked
Camel hump 1.94/1.50 heads hogged out to 2.02/1.60, pocket ported, port matched, pump-friendly hardened seats, 3-angle valve job
Cylinder bores clearanced to unshroud the valves
Comp Cams 1.52:1 roller-tip rockers
Crane Cam Vintage Muscle 327/350 hp cam, 222 degrees @ 0.05, 0.447" lift (with 1.50 rockers)
Doug Thorley headers, dechromed and ceramic-coated
2.5" mandral-bent exhaust (including tips), 2" cross-over just before rear axle
DynoMax stainless Ultra Flow mufflers
Millerspeed 1-1/2” Gilmer under drive belt drive system
Mallory Hyfire IV CD ignition box triggered off Accel points
Mallory high voltage chrome coil
Mallory spiral-wound coil wire
Mallory solid copper plug wires, ends soldered to wires
Champion plugs
37 degrees total ignition advance
Carter high volume fuel pump
Melling high volume oil pump
Open breathers
Polished aluminum high flow water pump
160-degree thermostat
Flex fan with polished aluminum spacer
Polished aluminum one-wire 100 amp alternator
Header Power Bracket
Keisler TKO600 5-Speed
Hurst shifter
3.70:1 positraction with Big Block yokes
225/60/15 Firestone Firehawk SZ50s on 7”-wide Western 30-spoke Turbine Wheels

From what I read and seen lately, I think a set of lightweight beehive springs and titanium retainers would up the RPM closer to 6K and get a tad over 300 RWHP.


Last edited by toddalin; 05-10-2014 at 11:38 AM.
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Old 05-12-2014, 02:18 PM
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327

The primary tubes on the shorties where smaller so the velocity was faster, the primaries tubes on the long tube headers where slightly bigger so slowed things down a little on the bottom end, never got the chevelle on the dyno to show u the sheets so this is all on the feel of the performance.
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