Guess the Dyno Results - 572 CID B1 original heads
#3025006
03/17/22 09:10 PM
03/17/22 09:10 PM
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Joined: Jan 2003
Posts: 16,925 NC
440Jim
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I expect to have my engine on the dyno this weekend. Let's hear some educated guesses! Engine Summary: 572 CID (4.500” bore x 4.500” stroke) 14.3 CR B1 original Heads, CNC Ported 429/326 cfm at 0.800” lift, milled to 60cc chambers, 332cc intake ports, 125cc exhaust ports T&D paired rocker arms 1.7 ratio, part number 8013, 5/8” shafts B1 cast single 4-barrel intake manifold with RB spacers. ICON Elite forged Pistons # IC433CAKTS gas ported with rings & 0.185” wall Trend wrist pins, 1.355 Compression height, -6.5cc net relief Rings 0.043" top SS with CrN, 1/16" Napier 2nd, 3/16" oil ring Cometic 5-layer MLS head gaskets 4.530” dia x 0.056” thick Cam duration 282/295 at 0.050”, 0.800” lift, 113 LSA 7/16 dia Comp Cams pushrods, 0.165” wall, ball-ball ends, pushrod oiling Headers have 8" of 2-1/8" primary tubes, then 21" of 2-1/4” tubes with 4” collectors The initial pulls will be with an 1150 Dominator and 116 octane Sunoco Maximal race gas. Then I will switch to the bracket racing carb I will be running in the car. APD 4150 series "1000 cfm" and pure alky (methanol). If anybody has a similar dyno result, please post it. I am not really sure what this thing will make. Jim https://board.moparts.org/ubbthread...3230/572-b1-org-part-1-buying-parts.htmlhttps://board.moparts.org/ubbthread...1-org-part-2-component-observations.htmlhttps://board.moparts.org/ubbthread...2-b1-org-part-3-machine-shop-report.htmlhttps://board.moparts.org/ubbthreads/ubbthreads.php/topics/2928218/572-b1-org-part-4-mock-ups.htmlhttps://board.moparts.org/ubbthread...66856/572-b1-org-part-5-build-notes.html
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Re: Guess the Dyno Results - 572 CID B1 original heads
[Re: AndyF]
#3025053
03/18/22 04:43 AM
03/18/22 04:43 AM
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Joined: Jan 2003
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440Jim
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Has the intake been ported or is it as cast? I know those are pretty good intakes as cast but porting will still help a bit. I bought the intake used, so I don't know the history. Visually, I can see some clean up inside. But I don't know how much. The intake manifold exit openings are slightly larger than the Koffel gaskets. I "ported" the 3/4" thick RB spacers to transition to the even larger heads. Then I used a Flat Out Gasket that had the right size openings . More info on Part 5 build notes. Link to Part 5 - intake
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Re: Guess the Dyno Results - 572 CID B1 original heads
[Re: 440Jim]
#3025064
03/18/22 07:50 AM
03/18/22 07:50 AM
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Joined: Jan 2003
Posts: 2,916 A shed in England
Tig
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For comparison, we have a .030 over 572 (580) with less lift (.768 gross), less flow (around 395), less C/R (12.4) but more carb (2 x 1150 TR). According to Wallace, it makes around 910hp on a good day (142 mph + @ 4023lb). Best shift point seems to be around 6800, rpms fall back 500rpm or so. So I'm guessing around 940 on gas and 1000 on Alcohol
'74 Challenger..9.46 @ 145.9 1/4, 6.001 @ 118 1/8 so far. 4023lb !!! # N/A, Marsh performance 655ci, Indy Maxx, T/R, Indy 600-13 X's, Street legal, pump gas, full interior, Cal-Tracs, mufflers, 3:73's and real 10.5 radials. 9.51 @ 142.4 1/4, 6.003 @ 114 1/8 with our old mule KB, 572-13, 580 wedge. RHD '68 Barracuda Fastback 323ci street/strip. Best ET 13.88 @ 99.03
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Re: Guess the Dyno Results - 572 CID B1 original heads
[Re: Tig]
#3025065
03/18/22 08:06 AM
03/18/22 08:06 AM
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Joined: Dec 2021
Posts: 1,126 Loudoun County, VA
Brad_Haak
super stock
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super stock
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Loudoun County, VA
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I'm not qualified to make an educated guess, but am looking forward to the results.
2021 Challenger 6.4L Scat Pack 1320 100% stock: 1.680, 11.894 at 113.75 (DA 175 ft) weight reduction, wheels, tires, Hellcat air box: 1.661, 11.686 at 115.97 (DA 710 ft)
1973 Challenger 452 ci street/strip [2008] pump gas, DOT radials: 1.454, 10.523 at 126.44 (DA 514 ft)
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Re: Guess the Dyno Results - 572 CID B1 original heads
[Re: Brad_Haak]
#3025085
03/18/22 09:16 AM
03/18/22 09:16 AM
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Joined: Jan 2003
Posts: 10,022 MN
JERICOGTX
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On gas it should go 1075+Hp no problem.
69 GTX
68 Road Runner
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Re: Guess the Dyno Results - 572 CID B1 original heads
[Re: JERICOGTX]
#3025096
03/18/22 09:49 AM
03/18/22 09:49 AM
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Joined: Jan 2003
Posts: 14,496 So. Burlington, Vt.
fast68plymouth
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I’d be looking for around 925-950 with the 1150 and race gas.
No vacuum pump?
68 Satellite, 383 with stock 906’s, 3550lbs, 11.18@123 Dealer for Comp Cams/Indy Heads
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Re: Guess the Dyno Results - 572 CID B1 original heads
[Re: fast68plymouth]
#3025100
03/18/22 10:16 AM
03/18/22 10:16 AM
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Joined: Jan 2003
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440Jim
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That's right; no vacuum pump. Nothing fancy. It will be interesting to see the difference in the Dominator on gas and the 4150 series alky carb. I had a hard time finding a dyno that would do this motor. Some "reasons" various shops gave me: 1) We only dyno engines we built 2) We don't have the stuff to do a Big Block Mopar (one had 6-bolt but not 8-bolt crank connector) 3) We dont' run alcohol in our dyno flow meters.
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Re: Guess the Dyno Results - 572 CID B1 original heads
[Re: HardcoreB]
#3025108
03/18/22 10:32 AM
03/18/22 10:32 AM
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fast68plymouth
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I have seen enough “strange looking” dyno sheets over the years to know they definitely don’t all spit out the same numbers.
The combo is pretty straight foward, and unless something is “wrong” with the motor, it’s going to make good power.
I feel that whatever the numbers are........ they could easily vary by over 50hp if the engine were tested on some different dyno services.
Just work on the tune up, get the best numbers you can....... and don’t get too excited about whatever the actual number is.
68 Satellite, 383 with stock 906’s, 3550lbs, 11.18@123 Dealer for Comp Cams/Indy Heads
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Re: Guess the Dyno Results - 572 CID B1 original heads
[Re: 440Jim]
#3025124
03/18/22 11:15 AM
03/18/22 11:15 AM
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Joined: Jan 2003
Posts: 17,844 S.E. Michigan
ZIPPY
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I am not educated but will say like 1000-something just to play along. Good luck with it!
Rich H.
Esse Quam Videri
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Re: Guess the Dyno Results - 572 CID B1 original heads
[Re: 440Jim]
#3025139
03/18/22 11:46 AM
03/18/22 11:46 AM
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Joined: Jan 2003
Posts: 31,027 Oregon
AndyF
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That's right; no vacuum pump. Nothing fancy. It will be interesting to see the difference in the Dominator on gas and the 4150 series alky carb. I had a hard time finding a dyno that would do this motor. Some "reasons" various shops gave me: 1) We only dyno engines we built 2) We don't have the stuff to do a Big Block Mopar (one had 6-bolt but not 8-bolt crank connector) 3) We dont' run alcohol in our dyno flow meters. Those are pretty common answers. The place I work with usually won't dyno engines they didn't build since it often turns into a pig pile. He has modified his policy over the years so he'll dyno engines from certain shops that he trusts but it still goes sideways on a regular basis. Not having the correct motor mounts or crank adapters or headers is also a common problem. It can cost upwards of a $1000 to equip the dyno for each engine model and if the customer doesn't want to pay for it then why should the dyno operator. A BB Mopar is fairly common so you should be able to find a shop with the setup you need but good luck if you want your nailhead run on the dyno or a 409 or something like that. Alcohol shouldn't be an issue but I'd charge extra since it takes time to flush the system out afterwards. You're probably looking at $2000 for a couple of days of testing including switching carbs and fuel and doing multiple pulls to dial in the timing and jetting.
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Re: Guess the Dyno Results - 572 CID B1 original heads
[Re: fast68plymouth]
#3025146
03/18/22 12:05 PM
03/18/22 12:05 PM
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Joined: Aug 2003
Posts: 43,162 Bend,OR USA
Cab_Burge
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The first B1 bracket motor I built and dyno (551 C.I.) made 920 HP with a 1400+ CFM Dam Best carb that was way to rich at WOT on C12 I think, the customer provided the fuel. That was with the stock B1 cast Dominator intake and right at 13.0 to 1 compression with a World iron block. I'm in the process of making a 572 C.I. B1 KB aluminum block bracket motor running E85 with a pair of Mark Sullens E85 Dominator carbs flowing around a 1000 CFM each, I'm hoping and shooting for 1000 + HP on pump E85 I may add around 550 HP of NOS to it later for a local No Pep deal
Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
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