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What will it make, 518 UPDATE #839958
10/27/10 12:14 AM
10/27/10 12:14 AM
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Bend,OR USA
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Cab_Burge Offline OP
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I'm getting ready to retest my pump gas 518 C.I. low deck stroker motor, I have tested this motor before with different heads, intakes, camshafts, crankshafts, compression ratio and different dyno brands. The last time I had it on a engine dyno was several years back, I tested it on the Studka dyno that Rodneys now runs , the motor had a set of Eddy RPM CNC ported by MCH that flowed 319 CFM at .600 on Jeffs bench, six pak intake and carbs on OR pump gas. The best pulls resulted in 718 Hp at 5800 RPMs and 744 Ft Lbs at around 4500 to 4800 RPM. I decided to change the heads to a set of Indy 40-1 CNC ported by MCH that flowed right at 370 CFM at .700 lift and a Indy 400-3 intake with a Summit two inch cloverleaf phenolic spacer. I will test four different Holley 1050 Dominators, one 9375HP, two 9375 non HP and one modified early 9375 with annular boosters Rodney was kind enough to test the 9375 annular carb. for me several weeks back so it will be interesting to see which carb. will make the most power Take a guess on HP at what RPM and torque also BTW, the 518 will go back into the Duster this winter , if it survives another test session See the last post by me on this for the updates

Last edited by Cab_Burge; 10/28/10 02:52 AM.

Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
Re: What will it make, 518 pump gas low deck [Re: Cab_Burge] #839959
10/27/10 12:35 AM
10/27/10 12:35 AM
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Delray beach, Florida
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couldn't even take a WAG without knowing more about the combo.
isn't that stuska dyno the one you found out was about 100 HP happy over a couple other ones you used?


machine shop owner and engine builder
Re: What will it make, 518 pump gas low deck [Re: Performance Only] #839960
10/27/10 01:04 AM
10/27/10 01:04 AM
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Bend,OR USA
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Quote:

couldn't even take a WAG without knowing more about the combo.
isn't that stuska dyno the one you found out was about 100 HP happy over a couple other ones you used?


I will provide what I forgot The other dyno operator(before Rodney) insisted that he calibrated it before every dnyo session each day I'm taking this motor back to the DTS which is at 4100 Ft above sea level, the Studka is at 2500 FT ASL. I forgot to mention on the first post that I'm using the same cam and lifters as before, Comp Cams solid roller with 260 @.050 intake with .420 lobe lift, 266 @.050 exhaust with .409 lobe lift. Harland Sharp 1.6 rockers(check to be right 1.64 actual net ratio at the retainers Manton 3/8 .145 wall thickness Stage 3 pushrods, PAC valve springs with around 50 lbs more seat and opend pressures than before, was 250 to 260 lbs seat, now 325 lbs on the seats, was 650 to 660 lbs opened, now 720 to 730 lbs open with Comp Cams 10 degree tool steel retainers and locks.The Eddy heads had Comp Cams Titianum 10 degree reatiners and keepers. The 440-1 heads have 8 cc smaller chambers so the new compression ratio is now 10.84 to 1 versus 10.29 to 1 before. Enjoy I'll post the results tomorrow evening, time permitting and the creek don't rise


Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
Re: What will it make, 518 pump gas low deck [Re: Cab_Burge] #839961
10/27/10 01:38 AM
10/27/10 01:38 AM
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Northeast, Alpine, NY
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I dont care what it makes CAB, just have fun and learn what you can. Try to make more then two pulls per swap. Enjoy my friend, I know you enjoy these days....Phill

Re: What will it make, 518 pump gas low deck [Re: Cab_Burge] #839962
10/27/10 01:41 AM
10/27/10 01:41 AM
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ohio
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Re: What will it make, 518 pump gas low deck [Re: Cab_Burge] #839963
10/27/10 01:51 AM
10/27/10 01:51 AM
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Oregon
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I'll be interested to see the numbers. The dyno I usually use is still down waiting for repairs after my last test session. I wouldn't mind bringing that motor over there and running it on Rodney's setup just to compare dynos.

Re: What will it make, 518 pump gas low deck [Re: AndyF] #839964
10/27/10 02:49 AM
10/27/10 02:49 AM
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Bend,OR USA
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Quote:

I'll be interested to see the numbers. The dyno I usually use is still down waiting for repairs after my last test session. I wouldn't mind bringing that motor over there and running it on Rodney's setup just to compare dynos.


Come on over, you may be suprised on the differences in the differnt dyno machines and how they operate. I'm spoiled on the DTS, Superflows and the new Studkas like Rodneys


Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
Re: What will it make, 518 pump gas low deck [Re: Cab_Burge] #839965
10/27/10 06:35 AM
10/27/10 06:35 AM
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on the happy dyno 1200hp

Re: What will it make, 518 pump gas low deck [Re: Quicktree] #839966
10/27/10 09:17 AM
10/27/10 09:17 AM
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Bend,OR USA
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Once Rodney learned how and calibrated the Studka dyno it lost right at a hundred HP and torque from one pull to the next after the calibration. It gets calibrated regulary now


Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
Re: What will it make, 518 pump gas low deck [Re: Cab_Burge] #839967
10/27/10 10:05 AM
10/27/10 10:05 AM
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Weddington, N.C.
Streetwize Offline
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My guess is around 785hp on a conservative dyno (so about 860 on 'happy' one )

I'm real curious to see the results, sounds like your heads are about on par with my Chapmans, I know you've got more Cam and the big single but still it ought to give me the most apples to apples since we've got near identical short blocks/cubes/heads...I've got 12:1 and looking at your spec really the cams are fairly close (264/268 @.050 HR .600/592 lift w 1/6's) too. What do the heads flow at .450 and at your peak lift? Those 2 lifts always seem to zero in on what these motors will make. for comparison mine did right at 310 @ .450 and 362 @ .600. It's not a ton of compression for a big port -1 with the big Indy intake, torque may take a little hit initially which I've seen can have an effect on the whole (momentum) curve on a dyno pull.

I kick myself for not dynoing mine, It was meant to have a big solid roller and Dommy/-3 and be set in an A-body race car like yours....it kind of wound-up slightly de-tuned and in the Charger after one too many 'barley pops'

Is your block Girdled? mine's not that's why I didn't take it to the full limit of my heads potential.

Last edited by Streetwize; 10/27/10 11:12 AM.

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Re: What will it make, 518 pump gas low deck [Re: Cab_Burge] #839968
10/27/10 10:22 AM
10/27/10 10:22 AM
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Quote:

I tested it on the Studka dyno that Rodneys now runs , the motor had a set of Eddy RPM CNC ported by MCH that flowed 319 CFM at .600 on Jeffs bench, six pak intake and carbs on OR pump gas. The best pulls resulted in 718 Hp at 5800 RPMs and 744 Ft Lbs at around 4500 to 4800 RPM.

I decided to change the heads to a set of Indy 40-1 CNC ported by MCH that flowed right at 370 CFM at .700 lift and a Indy 400-3 intake with a Summit two inch cloverleaf phenolic spacer.

Comp Cams solid roller with 260 @.050 intake with .420 lobe lift, 266 @.050 exhaust with .409 lobe lift. Harland Sharp 1.6 rockers
The 440-1 heads have 8 cc smaller chambers so the new compression ratio is now 10.84 to 1 versus 10.29 to 1 before


I think the head/intake change will give big results.

Guess +80 hp. But on a different dyno, all bets are off.

What header specs?


1993 Daytona, 5.50 at 130mph (1/8) 1.19 sixty ft (PG). Link to 572 B1 - Part 1
Re: What will it make, 518 pump gas low deck [Re: Cab_Burge] #839969
10/27/10 10:37 AM
10/27/10 10:37 AM
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Posts: 5,746
Ontario, Canada
Dodgem Offline
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My guess is 828 hp!

Re: What will it make, 518 pump gas low deck [Re: Dodgem] #839970
10/27/10 10:42 AM
10/27/10 10:42 AM
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Virginia Beach, VA
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Old School Offline
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Virginia Beach, VA
735hp 675tq


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Re: What will it make, 518 pump gas low deck [Re: Old School] #839971
10/27/10 11:06 AM
10/27/10 11:06 AM
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Highland beach Fl
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Highland beach Fl
751 HP @ 6700

Re: What will it make, 518 pump gas low deck [Re: poisondart2] #839972
10/27/10 12:35 PM
10/27/10 12:35 PM
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United Socialist States of Ame...
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Cab...Can't wait for results! That cam is almost identical to the one in my 512...


The end is near.....
Re: What will it make, 518 pump gas low deck [Re: Cab_Burge] #839973
10/27/10 01:02 PM
10/27/10 01:02 PM
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State of confusion
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Not good at guessing these things but would hope for at least 50-60 more hp/tq. Good luck either way.


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Re: What will it make, 518 pump gas low deck [Re: Cab_Burge] #839974
10/27/10 01:19 PM
10/27/10 01:19 PM
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Frostbitefalls MN (Rocky&Bullw...
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760 hp pops into my head. Hope you get more. For a reference, 760 hp to me would produce 9.20 ET at 146 mph in a 3,000 lb package, at sea level.


8..603 156 mph best, 2905 lbs 549, indy 572-13, alky
Re: What will it make, 518 pump gas low deck [Re: Old School] #839975
10/27/10 01:29 PM
10/27/10 01:29 PM
Joined: Feb 2006
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The Great White North
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Quote:

735hp 675tq




I'm with OldSchool, Somewhere around the 740 hp and 670-682 tq marks. J.Rob


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Re: What will it make, 518 pump gas low deck [Re: RAMM] #839976
10/27/10 02:04 PM
10/27/10 02:04 PM
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720ish hp... The heads flow more but at more lift... If you went with a taller cam then I can see that you are going to get th emost out of those heads...


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Re: What will it make, 518 pump gas low deck [Re: Boosted] #839977
10/27/10 02:35 PM
10/27/10 02:35 PM
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Queens, New York
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The number that pops out to me is the 718 hp with a ported eddy head on pump gas.

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