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572 going to the Dyno #2592875
12/16/18 06:14 PM
12/16/18 06:14 PM
Joined: Sep 2009
Posts: 500
MD
JACK1440 Offline OP
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well Guys... going to the dyno tomorrow after a long journey. If some of you might remember it started as a 557 and after lots of oiling issues. Hopefully now it's correct. Here's the combo

4.500 bore bill Mitchell alum block
4.500 molnar crank
molnar rods
racetec flat top pistons
15:1 comp
indy -1 heads 2.25 int valves (heavily ported) (flow sheet attached)
1.6 ratio T&D rockers
Comp Roller (cam card attached)
indy 3x intake
pro systems 1050 dom (flows 1180) also have a 1400 cfm SV1 to try

I'll update with hopefully good numbers Wednesday

http://pic20.picturetrail.com/VOL1316/13778739/24824990/414091188.jpg

http://pic20.picturetrail.com/VOL1316/13778739/24824990/414091190.jpg

http://pic20.picturetrail.com/VOL1316/13778739/24824990/414091189.jpg

Re: 572 going to the Dyno [Re: JACK1440] #2592879
12/16/18 06:19 PM
12/16/18 06:19 PM
Joined: Jan 2003
Posts: 14,479
So. Burlington, Vt.
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fast68plymouth Offline
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I hope things go well for you and that you have a good time.


68 Satellite, 383 with stock 906’s, 3550lbs, 11.18@123
Dealer for Comp Cams/Indy Heads
Re: 572 going to the Dyno [Re: JACK1440] #2592903
12/16/18 07:42 PM
12/16/18 07:42 PM
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KOS Offline
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sounds like 900+ ....good luck can't wait for the results!

Re: 572 going to the Dyno [Re: JACK1440] #2592913
12/16/18 08:10 PM
12/16/18 08:10 PM
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Oregon
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AndyF Offline
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Should make good power if everything is happy. That carb is going to hold back the peak power numbers if you care about that. The SV1 would be big enough if it works. Those can be tricky to dial in on a new combo.

Re: 572 going to the Dyno [Re: JACK1440] #2592964
12/16/18 10:16 PM
12/16/18 10:16 PM
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MI, usa
dvw Offline
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Hope everything rocks. It'll be interesting to see. -1 heads, 2.25 int valve, same; cubic inch, int duration, lift at the valve, lobe separation, 15-1 flat top. 2 750 Eddy's, Indy cross ram. Obviously way different intake and carb, and iron block vs aluminum. Never dynoed mine. 9.0@150,3345#1500D/A
Doug

Last edited by dvw; 12/17/18 12:36 AM.
Re: 572 going to the Dyno [Re: JACK1440] #2592990
12/16/18 11:29 PM
12/16/18 11:29 PM
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So. Burlington, Vt.
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fast68plymouth Offline
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One of the ones I did was 14:1, cnc345’s(which flowed exactly the same on a 4.375 and 4.500 bore........385-ish), 1.7 rockers, 282/282-110 .460/.460(not the cam that was intended for this motor, but that’s a whole nuther story)made about 875hp with a port matched 440-2/w-4150-4500 adapter and an hp1150.
The motor was going to be run with the Indy TR and 2x750’s, and I wanted to see what it was worth.
Mild port match only...... it made 911hp with the TR/2x750 combo.
9.07@145, 3660lbs.

A subsequent cam swap and 2x 1050 4500’s netted a 2mph gain, but no better on the ET.

Of course........ dynos vary like crazy(and every dyno service will tell you how stingy their dyno is) so there’s no telling what kind of numbers you’ll end up with.

The main thing I like to do is make sure the timing and carb are dialed in.


68 Satellite, 383 with stock 906’s, 3550lbs, 11.18@123
Dealer for Comp Cams/Indy Heads
Re: 572 going to the Dyno [Re: JACK1440] #2593005
12/17/18 12:11 AM
12/17/18 12:11 AM
Joined: Sep 2009
Posts: 500
MD
JACK1440 Offline OP
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Funny you say that. I was already told the dyno is very tight. I just hope for healthy motor after the dyno session and well 850hp would be nice too😁. The dyno shop is Cunningham competition in southern jersey. I’ll be sure to update you guys once I have the numbers.

Re: 572 going to the Dyno [Re: JACK1440] #2593024
12/17/18 01:17 AM
12/17/18 01:17 AM
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Aurora, Oh.
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max_maniac Offline
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Originally Posted By JACK1440
Funny you say that. I was already told the dyno is very tight. I just hope for healthy motor after the dyno session and well 850hp would be nice too😁. The dyno shop is Cunningham competition in southern jersey. I’ll be sure to update you guys once I have the numbers.



I'll guess based on that build you should get around 925 HP.

Re: 572 going to the Dyno [Re: JACK1440] #2593059
12/17/18 08:18 AM
12/17/18 08:18 AM
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Balt. Md
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383man Offline
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Good luck Jack. Keep us posted on results. Ron

Re: 572 going to the Dyno [Re: fast68plymouth] #2593068
12/17/18 09:34 AM
12/17/18 09:34 AM
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N.E. Ohio
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Nice Combo! Should be 900+ easily.

Fast69plymouth comments were interesting on the lack of ET gain with 2 Dominator's. My setup current runs two 750's and have been throwing the idea around of swapping them out for two 1050 Dominator carbs.

Interesting note, the 750's were Fast68Pymouth's dyno mules about 10 years ago and have served me well.


68 GTX, 9.38 at 144, Best Machine 540..
Re: 572 going to the Dyno [Re: JACK1440] #2593075
12/17/18 10:27 AM
12/17/18 10:27 AM
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Posts: 9,791
MI, usa
dvw Offline
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I tried 2 Quickfuel Holleys vs my box stock Eddy 750's. Maybe 1 mph but no ET improvement.
Doug

Re: 572 going to the Dyno [Re: JACK1440] #2593118
12/17/18 01:10 PM
12/17/18 01:10 PM
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Posts: 14,479
So. Burlington, Vt.
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fast68plymouth Offline
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Assuming the flow numbers can be compared to what I get from the cnc345’s(meaning, the OP’s heads are better), the extra point of CR, the higher lift, and the 3x manifold....... I’d say it “should” be really close to 900hp with appropriately sized headers.

Good candidate for a Q16 test as well.


68 Satellite, 383 with stock 906’s, 3550lbs, 11.18@123
Dealer for Comp Cams/Indy Heads
Re: 572 going to the Dyno [Re: dvw] #2593131
12/17/18 01:45 PM
12/17/18 01:45 PM
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UK
rb446 Offline
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Originally Posted By dvw
Hope everything rocks. It'll be interesting to see. -1 heads, 2.25 int valve, same; cubic inch, int duration, lift at the valve, lobe separation, 15-1 flat top. 2 750 Eddy's, Indy cross ram. Obviously way different intake and carb, and iron block vs aluminum. Never dynoed mine. 9.0@150,3345#1500D/A
Doug


Because I like to do this stuff, I put your no's@that DA in and came up with 919fwhp
60 Foot E.T. : 1.25
1/8 Mile E.T. : 5.65
1/8 Mile Trap Speed : 120.23
1/4 Mile E.T. : 8.96
1/4 Mile Trap Speed : 150
slide rule will show less.

Last edited by rb446; 12/17/18 01:50 PM.

1969 'Cuda 446ci, best 9.96@133.9 in 1990
1971 340 'Cuda, best 11.01@122.8 in 1987
Re: 572 going to the Dyno [Re: JACK1440] #2593160
12/17/18 03:00 PM
12/17/18 03:00 PM
Joined: Dec 2007
Posts: 12,587
Great Neck,LI,new york
hemi-itis Offline
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With an expectation of 850hp you will be VERY happy!!Dialing in SV1s are a bit of a chore to get right but they work well.

SV1ports2012.jpg9.30.1823.jpg

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My condition is fully BLOWN!!
Re: 572 going to the Dyno [Re: dvw] #2593171
12/17/18 03:14 PM
12/17/18 03:14 PM
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Bend,OR USA
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Cab_Burge Offline
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Originally Posted By dvw
I tried 2 Quickfuel Holleys vs my box stock Eddy 750's. Maybe 1 mph but no ET improvement.
Doug

Can you jet either set of carbs up rich enough to slow the MPH down in the 1/4 mile? If you can your at the best setup for your motor up If not maybe you should try that next work
What sizes are the Quickfuel carbs ?


Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
Re: 572 going to the Dyno [Re: fast68plymouth] #2593176
12/17/18 03:21 PM
12/17/18 03:21 PM
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Oregon
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AndyF Offline
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Originally Posted By fast68plymouth
Assuming the flow numbers can be compared to what I get from the cnc345’s(meaning, the OP’s heads are better), the extra point of CR, the higher lift, and the 3x manifold....... I’d say it “should” be really close to 900hp with appropriately sized headers.

Good candidate for a Q16 test as well.


Yeah an engine like that would probably pick up 25 or 30 hp with Q16 if you're willing to put up with the cost and the nasty side effects.

Re: 572 going to the Dyno [Re: JACK1440] #2593213
12/17/18 03:55 PM
12/17/18 03:55 PM
Joined: Jan 2003
Posts: 14,479
So. Burlington, Vt.
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fast68plymouth Offline
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I like trying it on that type of motor so you know:
- if it’s worth anything, and how much
- that you have the jetting and timing for it dialed in, in case you’d like to try it on some killer day when you’re trying for a new “best” at the track.


68 Satellite, 383 with stock 906’s, 3550lbs, 11.18@123
Dealer for Comp Cams/Indy Heads
Re: 572 going to the Dyno [Re: fast68plymouth] #2593225
12/17/18 04:16 PM
12/17/18 04:16 PM
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Oregon
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AndyF Offline
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Good point, especially on the jetting. What I learned while working with Q16 was that most carbs couldn't handle Q16 with just a jet change. I eventually ended up with a custom 1250 carb from BLP that could switch back and forth from gas to Q16 for dyno testing. On that carb we changed metering blocks rather than jets since the internal fuel passages all had to be larger to work with the larger jets. That was a nice dyno carb, it would've been perfect for this 572.

Re: 572 going to the Dyno [Re: JACK1440] #2593313
12/17/18 07:21 PM
12/17/18 07:21 PM
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So. Burlington, Vt.
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fast68plymouth Offline
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I wonder if it’s 900hp o’clock yet.


68 Satellite, 383 with stock 906’s, 3550lbs, 11.18@123
Dealer for Comp Cams/Indy Heads
Re: 572 going to the Dyno [Re: fast68plymouth] #2593382
12/17/18 09:37 PM
12/17/18 09:37 PM
Joined: Dec 2007
Posts: 12,587
Great Neck,LI,new york
hemi-itis Offline
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Originally Posted By fast68plymouth
I wonder if it’s 900hp o’clock yet.

That is the best time of the year!


HEMI-ITIS has no cure.
My condition is fully BLOWN!!
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