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#1
08-10-2024, 07:34 PM
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Monday is Dyno Day Guess my HP & Torque
I am going to put my 400/467 on the dyno Monday
1970 400 bored to 4.18 Block fitted with Program Engineering 4 bolt caps Line honed for the new caps Block filled with hard block to 1/3 above bottom of water pump holes Final hone of bores using a torque plate Scat 4.25 forged cross drilled crank Eagle 6.8 rods Ross flat top piston 13:1 compression, pistons .003-.005 above deck Cometic .040 head gasket Edelbrock Old style combustion chambers Average Intake flow @ .700 331.6 CFM Average exhaust flow @.700 lift 249.4 219/1.77 valves, CNC Ported by SD Performance in Feb of 2007 Ultradyne solid roller 264/268 @ .050, 176/187 @ .200 .3944/.3944 Lobe Lift LSA 108 Crower 1.65 rocker arms Victor with 8896 1050 Dominator home made 1-1/2 inch spacer 4 hold to open 1-7/8 Indian Adventures headers with Flowmaster 4-2-1 collectors MSD Pro billet Distributor, MSD Blaster 2 Coil, MSD 6AL Sunoco Purple 110 race gas What HP and torque numbers do you predict
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Tim Corcoran Last edited by Tim Corcoran; 08-10-2024 at 07:43 PM. |
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#2
08-10-2024, 07:44 PM
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Kind of close to my 500 but a you have a little more CR. I have 2" headers.
650 HP
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Skip Fix 1978 Trans Am original owner 10.99 @ 124 pump gas 455 E heads, NO Bird ever! 1981 Black SE Trans Am stockish 6X 400ci, turbo 301 on a stand 1965 GTO 4 barrel 3 speed project 2004 GTO Pulse Red stock motor computer tune [email protected] 1964 Impala SS 409/470ci 600 HP stroker project 1979 Camaro IAII Edelbrock head 500" 695 HP 10.33@132 3595lbs 1964 Corvette Coupe 327 4 speed |
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#3
08-10-2024, 08:29 PM
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I'll take a stab at it with 650 tq and 640 hp.
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Greg Weigart IAIIA 520/pump gas/SD 325 E-heads/266-272 SR cam/1050 Dominator/3.73/ET Street Radial Pro/3300lbs/1.35 60'/[email protected]/[email protected] Hot Rod Drag Week finishing averages: 2014 - 11.12 @ 118.56 2015 - 10.84 @ 124.97 2016 - 10.56 @ 127.88 2017 - 10.29 @ 130.74 2018 - 10.29 @ 130.53 2019 - 10.16 @ 132.34 2021 - 10.09 @ 132.69 - Quickest Pontiac 2022 - 10.13 @ 133.07 2025 - [email protected] - 2nd place SRBBNA 
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#4
08-10-2024, 08:43 PM
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602 598
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The More People I Meet, The More I Love My Dogs! |
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#5
08-10-2024, 09:33 PM
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660 HP / 570 lbft tq.
That's close to the 474 I used to run. You probably have a little better Cyl.Head |
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#6
08-10-2024, 09:36 PM
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Good wishes to you Tim
663 / 613 |
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#7
08-11-2024, 07:00 AM
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My guess is 654 Hp.
I must add that with your compression and crank stroke I think that running 1.65 rockers on the exh side will hurt your all important average power numbers. Can you make two pulls with 1.5 rockers on the motor?
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Wernher Von Braun warned before his retirement from NASA back in 1972, that the next world war would be against the ETs! And he was not talking about 1/8 or 1/4 mile ETs! 1) 1940s 100% silver 4 cup tea server set. Two dry rotted 14 x 10 Micky Thompson slicks. 1) un-mailed in gift coupon from a 1972 box of corn flakes. Two pairs of brown leather flip flops, never seen more then 2 mph. Education is what your left with once you forget things! |
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#8
08-11-2024, 12:30 PM
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engine dyno or chassis dyno?
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 66 GTO, 495, M22, Strange S-60 w/4.10 Sold new at Royal Pontiac (Dealer# 07-679) 70 Formula 400/auto |
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#9
08-11-2024, 12:38 PM
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Quote:
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Tim Corcoran |
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#10
08-11-2024, 12:39 PM
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Quote:
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Tim Corcoran |
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#11
08-11-2024, 12:50 PM
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I don't like guessing but good luck with the dyno session.
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#12
08-11-2024, 02:30 PM
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Just on the exh if your geometry does not go too far off the rails.
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Wernher Von Braun warned before his retirement from NASA back in 1972, that the next world war would be against the ETs! And he was not talking about 1/8 or 1/4 mile ETs! 1) 1940s 100% silver 4 cup tea server set. Two dry rotted 14 x 10 Micky Thompson slicks. 1) un-mailed in gift coupon from a 1972 box of corn flakes. Two pairs of brown leather flip flops, never seen more then 2 mph. Education is what your left with once you forget things! |
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#13
08-11-2024, 10:51 PM
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Close to a engine I had done 640hp 595 trq
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72 lemans,455 e-head, UD 255/263 solid flat,3.73 gears,,,10" 4400 converter,, 6.68 at 101.8 mph,,1.44 60 ft.2007 (cam 271/278 roller)9"CC.4.11gear 6.41 at 106.32 mph 1.42 60 ft.(2009) SOLD,SOLD 1970 GTO 455 4 speed #matching,, 3.31 posi.Stock manifolds. # 64 heads.A factory mint tuquoise ,69' judge stripe car. 8.45 @ 88.1 mph on slippery street tires.Bad 2.19 60ft.Owned since 86' |
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#14
08-12-2024, 01:49 AM
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640tq 610hp
Curious what timing and AFR when you're done was at peak numbers.
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69 GTO Convertible, 4000lbs 462ci, 606tq/569hp - 93 oct @ 34 deg (207psi) 11.7:1, KRE H Ports, Lunati HR 282/290 w Johnson Lifters & 1.65 Scorp, E30, EFI, Holley HP + Dual Sync, 12-1 Crank Trig, 120lb Inj & 1000cfm TB, Torker II EFI Int & Rails, PTC 10", Rock Valley SS Tank, Dual 450s, Aerom EFI Reg, Aero Front & Wilwood Rear Disc Brakes, Dougs 1 7/8" & Borla Pro XS 3", Alum Rad & Dual Fans, 12:1 Box, UMI Arms & Viking Berz Fr + Rear CO Shocks, Hella UP5.0 Vac Pump, 12 Bolt, 3.73, 33 Spline |
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#15
08-12-2024, 06:26 PM
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601 TQ and 633 HP is my guess
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James 1970 Trans Am Spotts Built 484" IA2, Highports, EFI Northwind, E85 Holley Terminator X sequential EFI fabrication and suspension by https://www.funkhouserracecars.com/ |
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#16
08-12-2024, 07:43 PM
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I cant keep this drum roll up much longer! I can hardly wait!
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. Mark S . Who needs nice and pretty, when you can have mean and nasty? KRE Aluminum headed 463CID 73 LeMans. Used to run 10.6x @ 124.55. 3700lbs . So much for 2020...shootin for 9s in 2021...and in 2022 apparently.....and 2023....and 2024.....and 2025.....who am I kidding? there will be no 9s with this engine! >>My 73 Build thread |
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#17
08-12-2024, 08:28 PM
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Sometimes no news isn't good news. Hope it went well
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Be carefull of the feet you step on today.They may be attached to the a$$ you kiss tomorrow. |
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#18
08-13-2024, 01:14 AM
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Fingers crossed its just a dilemma , not some kind of chaos.
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#19
08-13-2024, 01:27 AM
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Could have just been a very long day at the dyno cell….
 622 hp - 590 tq
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1964 Tempest Coupe LS3/4L70E/3.42 1964 Le Mans Convertible 421 HO/TH350/3.08 2002 WS6 Convertible LS1/4L60E/3.23 1966 VW Type 2 Single Cab Pickup 140hp 2276 1956 VW Type 2 Panel Van 36hp 1200 1957 VW Type 1 Beetle 180hp 2276 |
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#20
08-13-2024, 07:45 AM
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It was a long day on the dyno tuning the carburetor to improve the fuel curve and getting the timing ideal. The engine ran great and no leaks including the rear main seal was dry at the end of the day. Didn't have time to change rocker arms with 1.5's and I didn't want to pay for another day on the dyno. I will go back on Wednesday and pick up the engine and get the printed dyno pull sheets. Best pull was under 600 HP. I will tell more after I have dyno sheets. I had my street engine dynoed at the same place I think this guys dyno is not accurate. I believe the race track will tell a better story.
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Tim Corcoran |
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