Re: Dynoing soon! 550 cu un 572-13 what will it make?
[Re: gregsdart]
#3108580
01/04/23 07:56 PM
01/04/23 07:56 PM
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Joined: Jan 2003
Posts: 14,514 So. Burlington, Vt.
fast68plymouth
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I haven’t tested enough stuff on methanol to really have a feel for how it would compare to something like Q16 in a build like that. I suspect the Q would perk it up pretty good up top, and the TQ would likely take a hit lower down.
Al might have some experience between the two fuels.
Still decent numbers, and it’s still in one piece.
68 Satellite, 383 with stock 906’s, 3550lbs, 11.18@123 Dealer for Comp Cams/Indy Heads
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Re: Dynoing soon! 550 cu un 572-13 what will it make?
[Re: dvw]
#3108629
01/04/23 10:14 PM
01/04/23 10:14 PM
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6PKRTSE
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Nice numbers. So, who was the closet on the prediction? We always do a dollar a guess at work per person on h.p. & torque numbers and the closest to both numbers wins the pot.
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: Dynoing soon! 550 cu un 572-13 what will it make?
[Re: gregsdart]
#3108635
01/04/23 10:19 PM
01/04/23 10:19 PM
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Joined: Jan 2003
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440Jim
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Greg, It may not have made the 1000 hp you wanted, but it is healthly. And with more vacuum (sealing crankcase) it will be closer. From posts over the years, my impression with these combos are one small difference can be +/- 50 hp. I am trying to compare to your 550 CID tricked out 440-1 heads. - Same bore x stroke - Same cam - Same intake manifold. But Wilson ported for 572-13 - Same alky injection system - CR: 15.1 (440-1), 14.5 (572-13) - Headers: 2.25" (440-1), Stepped 2.125" to 2.25" (572-13) 440-1 heads ___ 572-13 heads 747.9 tq 5700 __768.8 tq 5300 (lowest rpm measured on 572-13) 926.2 hp 7200 __957.1 hp 7400 (highest rpm measured on 440-1) Are there any changes to above? Tested some 9 year old M5 (alky) that tested dead on at .807 sq, 968.7 hp at 7400, 772 tq at 5700 (782@5300).
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Re: Dynoing soon! 550 cu un 572-13 what will it make?
[Re: gregsdart]
#3108673
01/04/23 10:44 PM
01/04/23 10:44 PM
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Joined: Aug 2003
Posts: 43,292 Bend,OR USA
Cab_Burge
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I Win
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Next dyno test take, it to 8000 RPM Don't be surprised if it picks up 50 HP
Last edited by Cab_Burge; 01/04/23 10:44 PM.
Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
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Re: Dynoing soon! 550 cu un 572-13 what will it make?
[Re: Cab_Burge]
#3108820
01/05/23 09:35 AM
01/05/23 09:35 AM
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gregsdart
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Next dyno test take, it to 8000 RPM Don't be surprised if it picks up 50 HP Cab, i get nervous enough at 7600! I am not going to re dyno it, but am thinking of some changes. I am at 74.4 cc on the heads, going with a . 030 cut will being them to 69.4 and raise compression to 15.24/1. The other change is go with back cut valves . If the high lift doesn't hurt power, as shown by flow loss/turbulance at . 800+ lift, i might see my 1000 hp at the track. At our average DA around hear, that would put me at about 8.48 et. That will have to do🙃
8..603 156 mph best, 2905 lbs 549, indy 572-13, alky
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Re: Dynoing soon! 550 cu un 572-13 what will it make?
[Re: Cab_Burge]
#3108834
01/05/23 10:14 AM
01/05/23 10:14 AM
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JERICOGTX
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Next dyno test take, it to 8000 RPM Don't be surprised if it picks up 50 HP It made 9 hp from 7100 to 7600. Doubt it will pick up 50hp winding it up another 400 rpm. Greg, it might not have been the number you are looking for, but as has been stated many times before, the dyno is just a tool, and at the end of the day you have a nice piece to install in the car, and it's going to be fast.
69 GTX
68 Road Runner
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Re: Dynoing soon! 550 cu un 572-13 what will it make?
[Re: gregsdart]
#3108840
01/05/23 10:28 AM
01/05/23 10:28 AM
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Joined: Feb 2005
Posts: 20,197 PA.
pittsburghracer
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Next dyno test take, it to 8000 RPM Don't be surprised if it picks up 50 HP Cab, i get nervous enough at 7600! I am not going to re dyno it, but am thinking of some changes. I am at 74.4 cc on the heads, going with a . 030 cut will being them to 69.4 and raise compression to 15.24/1. The other change is go with back cut valves . If the high lift doesn't hurt power, as shown by flow loss/turbulance at . 800+ lift, i might see my 1000 hp at the track. At our average DA around hear, that would put me at about 8.48 et. That will have to do🙃 Greg you probably have it on this post somewhere but why didn’t you want a 30 degree back cut done. What did Larry Smith think about you not wanting it done
1970 Duster Edelbrock headed 408 5.984@112.52 422 Indy headed small block 5.982@112.56 mph 9.42@138.27
Livin and lovin life one day at a time
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Re: Dynoing soon! 550 cu un 572-13 what will it make?
[Re: pittsburghracer]
#3108863
01/05/23 11:17 AM
01/05/23 11:17 AM
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gregsdart
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Next dyno test take, it to 8000 RPM Don't be surprised if it picks up 50 HP Cab, i get nervous enough at 7600! I am not going to re dyno it, but am thinking of some changes. I am at 74.4 cc on the heads, going with a . 030 cut will being them to 69.4 and raise compression to 15.24/1. The other change is go with back cut valves . If the high lift doesn't hurt power, as shown by flow loss/turbulance at . 800+ lift, i might see my 1000 hp at the track. At our average DA around hear, that would put me at about 8.48 et. That will have to do🙃 Greg you probably have it on this post somewhere but why didn’t you want a 30 degree back cut done. What did Larry Smith think about you not wanting it done Not sure what Larrys thinking was, just that he wanted no back cut. But due to other knowledgeable folks saying go with a back cut, i am probably going to do that.
8..603 156 mph best, 2905 lbs 549, indy 572-13, alky
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Re: Dynoing soon! 550 cu un 572-13 what will it make?
[Re: gregsdart]
#3108896
01/05/23 12:23 PM
01/05/23 12:23 PM
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Joined: Jan 2003
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HardcoreB
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Next dyno test take, it to 8000 RPM Don't be surprised if it picks up 50 HP Cab, i get nervous enough at 7600! I am not going to re dyno it, but am thinking of some changes. I am at 74.4 cc on the heads, going with a . 030 cut will being them to 69.4 and raise compression to 15.24/1. The other change is go with back cut valves . If the high lift doesn't hurt power, as shown by flow loss/turbulance at . 800+ lift, i might see my 1000 hp at the track. At our average DA around hear, that would put me at about 8.48 et. That will have to do🙃 YOU COULD EASILY LOOSE POWER by doing that!!! Overmilling generally hurts flow and who's to say the dome you have is helping power?! Leave it alone fix what you know is bad e.g.-lack of crankcase vacuum
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Re: Dynoing soon! 550 cu un 572-13 what will it make?
[Re: gregsdart]
#3108921
01/05/23 01:05 PM
01/05/23 01:05 PM
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CSK
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I know you guys are smarter than me , the AFR for meth is out of wack on the dyno sheets, you leaned it out & lost power, it was already to lean to begin with, just asking how the wide band was set up to read the AFR. on mine I can set what fuel is used ?
Last edited by csk; 01/05/23 01:07 PM.
1968 Charger COLD A/C Hilborn EFI 512ci 9.7 compression, Stealth heads, 4.10 gear A518 ODtrans 4100lb,10.93 full street car trim 2020 T/A 392 Stock 11.79 @ 114.5
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Re: Dynoing soon! 550 cu un 572-13 what will it make?
[Re: CSK]
#3108927
01/05/23 01:15 PM
01/05/23 01:15 PM
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Al_Alguire
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Guess my 950/770 guess wasn't so far off afterall...Get the vaccum up to 15 or more and you will find a little HP. The back cut may not show much on the dyno sheet either but worth a shot if you want to try but depends on how the bowl area is done to take advantage. It certainly shows on a flow sheet but may not be a great idea.
"I am not ashamed to confess I am ignorant of what I do not know."
"It's never wrong to do the right thing"
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Re: Dynoing soon! 550 cu un 572-13 what will it make?
[Re: Al_Alguire]
#3108946
01/05/23 01:46 PM
01/05/23 01:46 PM
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Joined: Feb 2005
Posts: 20,197 PA.
pittsburghracer
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Greg do you know what valve job was done on the head. (Angles and how many)
1970 Duster Edelbrock headed 408 5.984@112.52 422 Indy headed small block 5.982@112.56 mph 9.42@138.27
Livin and lovin life one day at a time
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Re: Dynoing soon! 550 cu un 572-13 what will it make?
[Re: CSK]
#3108953
01/05/23 02:07 PM
01/05/23 02:07 PM
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Blusmbl
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I know you guys are smarter than me , the AFR for meth is out of wack on the dyno sheets, you leaned it out & lost power, it was already to lean to begin with, just asking how the wide band was set up to read the AFR. on mine I can set what fuel is used ? I assume it wasn't touched and that's on the gasoline scale.
'18 Ford Raptor, random motorcycles, 1968 Plymouth Fury III - 11.37 @ 118
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Re: Dynoing soon! 550 cu un 572-13 what will it make?
[Re: CSK]
#3108960
01/05/23 02:18 PM
01/05/23 02:18 PM
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440Jim
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I know you guys are smarter than me , the AFR for meth is out of wack on the dyno sheets, you leaned it out & lost power, it was already to lean to begin with, just asking how the wide band was set up to read the AFR. on mine I can set what fuel is used ? I couldn't resist commenting, since Greg has not. The two dyno runs he posted are with different fuels. Straight methanol, and M5 And the dyno note "8 bigger pill" was for run 8 compared to run 7 (which was not posted). Run 8 at 14:08 (larger pill, leaner than run 7) 957hp at 7400 rpm 11.2 air/fuel (gas scale). Lambda=0.76 Run 10 at 14:31 (changed fuel to M5) 968 hp at 7400 rpm 10.7 air/fuel (gas scale). Lambda=0.73 I am using methanol Stoichiometric 6.45, M5 may have a slightly different number. I have run gas, methanol, and E85. I just prefer to display the gasoline scale on the O2 sensor so I don't have to remember different numbers for close to best power ratio (approximate) for different fuels. And when I ran injected methanol, I found too rich was better than too lean. And I think 11.2 is on the rich side. (4.9 A/F on methanol scale)
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Re: Dynoing soon! 550 cu un 572-13 what will it make?
[Re: gregsdart]
#3108967
01/05/23 02:29 PM
01/05/23 02:29 PM
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Next dyno test take, it to 8000 RPM Don't be surprised if it picks up 50 HP Cab, i get nervous enough at 7600! I am not going to re dyno it, but am thinking of some changes. I am at 74.4 cc on the heads, going with a . 030 cut will being them to 69.4 and raise compression to 15.24/1. The other change is go with back cut valves . If the high lift doesn't hurt power, as shown by flow loss/turbulance at . 800+ lift, i might see my 1000 hp at the track. At our average DA around hear, that would put me at about 8.48 et. That will have to do🙃 Greg you probably have it on this post somewhere but why didn’t you want a 30 degree back cut done. What did Larry Smith think about you not wanting it done Not sure what Larrys thinking was, just that he wanted no back cut. But due to other knowledgeable folks saying go with a back cut, i am probably going to do that. Be VERY careful using a back cut IF you are not going to test the crap out of it. It probably will make more air flow and hurt power. If you live and die by flow numbers you love back cuts. If you understand the limits of a flow bench and don’t live and die by flow numbers you won’t think so highly of back cuts. Flow numbers sell heads. But complete testing makes horsepower.
Just because you think it won't make it true. Horsepower is KING. To dispute this is stupid. C. Alston
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Re: Dynoing soon! 550 cu un 572-13 what will it make?
[Re: pittsburghracer]
#3109222
01/05/23 11:16 PM
01/05/23 11:16 PM
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Joined: Jan 2003
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gregsdart
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I am not sure on the valve job, i assume three angle? I never thought to look! Thanks for the comments! I have decided to wait and not change anything till i run it, or come across solid proof what i want to change will be a positive. This is what i think needs addressing at this point. Fix vacuum leaks. Remove spraybar oiling- reason; my system wasn't pushing out oil before through the vacuum system. Same system, over a full quart, maybe two in my big vacuum breather tank from ten pulls. The motor has to be making a lot of oil froth to do that. Also this motor has a wierd dome shape that i don't like, and timing ended at 37 degrees total, and i ran 34 without that weird little dome in the 440-1 headed combo. So if i ever want to raise compression i think it best to wait till i can have that little odd ball bubble part of the dome removed. My apologys if i missed anybodys questions.
Last edited by gregsdart; 01/05/23 11:19 PM.
8..603 156 mph best, 2905 lbs 549, indy 572-13, alky
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