572 pump gas hemi dyno test results
#2493220
05/07/18 03:00 PM
05/07/18 03:00 PM
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Joined: Aug 2003
Posts: 43,099 Bend,OR USA
Cab_Burge
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Bend,OR USA
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I built and dyno tested a pump gas 572C.I. EFI Hemi motor for a local car show guy, he didn't want a all out high performance street and strip motor It is going into a 1970 Challenger with power steering, air conditioning, 18 or 20 inch wheels with a low ride height for driving to the local car shows and a car his wife can drive also I started with a new World 4.500 bore cast grey iron block, new Scat 4.500 stroke Hemi crank, Manley SS Hemi I beam rods, Diamond pistons that ended up having 11.01 to 1 compression ratio, CNC ported Stage V street heads with all the Stage V rocker gear, EFI camshaft for power brakes, dual 4150 EFI throttle body single plane intake from Tim at FHO Holley Dominator EFI tuned by Rich at Fastman EFI on a DTS engine dyno in Chico, CA last month. It made 799 HP at 6500 RPM in a open loop with 730 Ft. Lbs. torque at 4900 RPM, I was hoping for more HP and torque but the customer is happy We tested it from 3500 RPM to 6500 RPM, it made 469 HP at 3500 with 704 Ft lbs. and it made 799 HP at 6500 RPM with 645 Ft. Lbs. Hopefully this will set the customer WAY back in his seat at WOT under any conditions That is if he doesn't loose control of it first
Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
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Re: 572 pump gas hemi dyno test results
[Re: Cab_Burge]
#2493232
05/07/18 03:19 PM
05/07/18 03:19 PM
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Joined: Jan 2004
Posts: 4,562 Motor City
6PKRTSE
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master
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Motor City
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Sounds like a nice piece. As long as the customer is happy, that is all that matters.
1963 Belvedere 440 Max Wedge Tribute 1970 Charger R/T S.E. 440 Six Pack 1970 Challenger R/T, 528 Hemi 1970 Charger 500 S.E. 440 4 BBL 1970 Plymouth Road Runner 383 1974 Chrysler New Yorker 440 1996 2500 RAM 488 V-10 4X4 2004 3500 Dually Cummins 4x4 2012 Challenger R/T Classic.
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Re: 572 pump gas hemi dyno test results
[Re: Clanton]
#2493359
05/07/18 08:42 PM
05/07/18 08:42 PM
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Joined: Aug 2003
Posts: 43,099 Bend,OR USA
Cab_Burge
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Bend,OR USA
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Power brakes,so what was the Vacuum reading ? No idea, the dyno operator didn't hook it up to record that and I din't bring a hand held vacuum gauge to check it I'm going to take a SWAG and say above 10.00 inches at or above 1000 RPM This cam was ground on a 112 LSA and installed at 112.5 ICL, I check both lobes and the intake varied from 112.5 to 113.0 on the intake lobe and the exhaust degreed in at 110 at all three points, .200,.100 and .050 before max lift
Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
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Re: 572 pump gas hemi dyno test results
[Re: fuseable]
#2493361
05/07/18 08:51 PM
05/07/18 08:51 PM
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Joined: Aug 2003
Posts: 43,099 Bend,OR USA
Cab_Burge
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What are the cam spec's, solid or roller? It is one of Tim custom ground EFI solid rollers with 254 degrees at .050 on the intake lobes(.388 lobe lift) with 262 degrees @ on the exhaust lobes with .383 lobe lift. It has Stage V rocker arms also, not sure of the ratio though
Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
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Re: 572 pump gas hemi dyno test results
[Re: Airwoofer]
#2493369
05/07/18 09:06 PM
05/07/18 09:06 PM
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Joined: Aug 2003
Posts: 43,099 Bend,OR USA
Cab_Burge
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It does have a Scat 8 bolt hemi crank in it It has a set of TTI early, pre 1965, B body 2.0x2 1/8 with 4.0 inch collectors per the instructions from Reilly motorsports on their tubular K member. We used a set of three inch pipes 42 inches long and a set of 3.0x14 inch Ultra Flow straight through muffs to prevent back flow for the O2 sensor on the EFI.
Last edited by Cab_Burge; 05/07/18 09:12 PM.
Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
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Re: 572 pump gas hemi dyno test results
[Re: fuseable]
#2493462
05/08/18 01:15 AM
05/08/18 01:15 AM
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Joined: Aug 2003
Posts: 43,099 Bend,OR USA
Cab_Burge
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I think I just built the same engine with parts from Tim with the same cam. Are the valve springs beehive springs? What size injectors did you achieve those #'s with? I did use the beehive springs Tim provided, I was hesitant to use them with only 430 lbs opened pressure though it would be interesting to add around 75 lbs. more seat pressure and 150 Lbs on the open side to see if the motor would have pulled up higher on the peak RPM The injectors are 65 lbs. per hour, I think. Rich provided them with the Holley Dominator EFI system I used a Aeromotive 1000 electric fuel pump for the dyno testing with #10 AN Teflon feed line and #8 AN Teflon to the injector fuel rails and return line to the tank Rich set the fuel regulator bypass pressure at 43 Lbs. I think
Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
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Re: 572 pump gas hemi dyno test results
[Re: Cab_Burge]
#2493479
05/08/18 02:36 AM
05/08/18 02:36 AM
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Joined: Oct 2006
Posts: 246 Cranberry Twp PA (North of Pit...
rumblefish72
enthusiast
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enthusiast
Joined: Oct 2006
Posts: 246
Cranberry Twp PA (North of Pit...
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That's a nice motor and all that torque will probably break other things in the drivetrain (unless the owner has little tires). And if RichN tuned it, I'm sure it will purr like a kitten and then roar like a lion as you mash the loud pedal. I see that TTI recommends http://www.ttiexhaust.com/MoparClassics-Headers/Hemi6265/TTiHEMI625-218214.cos.htm for E-Body with coil overs. Do the headers in the dyno run video belong to the dyno shop? I ask because I see the exhaust temp bungs welded in and I wonder if they will hit the inner fenderwell shock tower area on passenger side once that bad boy is in the car. I just ordered a custom set of TTI 2-1/4" primary tube with 4" collector with O2 sensor bungs and a V-Band flange instead of the 3-bolt collector flange. I was going to wait until after installing a Gerst K-Frame so I would only have to order those expensive TTI Headers once but decided to just go with my stock k-member for now so I can get my Hemi ( https://youtu.be/95gZTspdzsg) installed and get on the street/strip this year. My current exhaust system uses 3" UltraFlows but as my hearing gets worse, I think I'll switch back to the FlowMasters.
1972 Pro-Street 'Cuda, 500" Eagle stoker B Block, Eddy RPM heads, Victor Manifold, 850 Mighty Demon, Hemi 4 Speed, Dana 60 w/4.88 gears - Built by Hansen Racing Middlesex - NJ
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Re: 572 pump gas hemi dyno test results
[Re: Cab_Burge]
#2493606
05/08/18 12:52 PM
05/08/18 12:52 PM
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Joined: Jan 2003
Posts: 1,938 Sonora CA
Mopar_Rich
top fuel
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top fuel
Joined: Jan 2003
Posts: 1,938
Sonora CA
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OK - Here are some answers, except for Dave Hall who called me an old nerd. Idle vacuum at 1000 RPM with 18 degrees of timing was 14.5" HG Total timing was 34 degrees Injectors were 66 lb/hr Holley HP EFI running the Holley dual-sync dizzy Sequential injection Dual 4150 Accufab throttle bodies Injector max duty cycle was 73% at 386 lb/hr total flow Pump gas Here's a pic from an early pull before final tuning.
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Re: 572 pump gas hemi dyno test results
[Re: Cab_Burge]
#2493609
05/08/18 12:59 PM
05/08/18 12:59 PM
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Joined: Jan 2003
Posts: 13,351 Marion, South Carolina [><]
an8sec70cuda
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I Live Here
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Marion, South Carolina [><]
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Very nice! Surprised it made that kind of power w/ that little cam.
CHIP '70 hemicuda, 575" Hemi, 727, Dana 60 '69 road runner, 440-6, 18 spline 4 speed, Dana 60 '71 Demon, 340, low gear 904, 8.75 '73 Chrysler New Yorker, 440, 727, 8.75 '90 Chevy 454SS Silverado, 476" BBC, TH400, 14 bolt '06 GMC 2500HD LBZ Duramax
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