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Another Thumperdart Success.....572 Hemi Sized (pics&Vids) #2042293
03/30/16 09:53 PM
03/30/16 09:53 PM
Joined: May 2004
Posts: 11,197
Taxes & Virus's R-US, NY
Dragula Offline OP
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Dragula  Offline OP
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Joined: May 2004
Posts: 11,197
Taxes & Virus's R-US, NY
Well, I probably am leaving out some details, but a friend of mine built a similar engine as mine....And asked if would come down and watch it being dyno'd....Of course I said yes, and brought my Thumperized 1250 Dominator to try if we had time.

Build specs:
572 Hemi
Eddy heads
Solid Mechanical 283 dur @50 .680 lift
9.5:1
World Block
Intake....Depends! But probably a Six Pack.....Yeah, Sixpack Hemi!

-We tried a heavily modified six pack on a Modman intake first...This is Rob's engine, and for anyone who does not know him in the Mopar circles, he IS Mr. Six Pack.....He has been racing these six packs on Wedges for so long, I don't think he could help himself and built one for the Hemi. I was very glad he went with the Modman intake on this build as well.

-First of many pulls was with the sixpack...Lots of tuning went into it on a basic run in stand with an AFR gauge before the dyno, but without a load, its tough....

Best pull with it was 741hp & 666ft/lbs....lots of tuning to get it there. Still needs work as the transition was blubbery with the vacuum carbs coming in...I prefer to run three mechanicals over anything vacuum, but I am sure he will figure it out.






Vid.............:
https://www.youtube.com/watch?v=ueC_4nAdSZ4&feature=youtu.be


Next was the Promax 950 Dyno mule carb he had....Not sure what was done, but we made a bunch of pulls with it changing air bleads, timing, etc and netted a best of 749hp at 704ft/lbs...





Vid.......................:
https://www.youtube.com/watch?v=5QjkTW-o1QY&feature=youtu.be



Now we get to my 1250 G3 Holley that I had Thumperized.....Now it has not had fuel in it since the conversion....It was a 3-circuit and I could not make it work on my 605...Had it converted to 2-circuit, and never touched it!

Fired right up to a perfect idle, and then mad 779hp & 717ft/lbs of torque....No adjustments other than floats....





Vid......................:
https://www.youtube.com/watch?v=M5l_w8n8gbE&feature=youtu.be


Thanks Mike at Jan Cen Racing and Rob Brooks for inviting me....


Last edited by Dragula; 03/30/16 10:35 PM.

'71 Duster 400/512
https://www.youtube.com/watch?v=Znuo3jMUXTk (6.00 at 114.05mph)
https://www.youtube.com/watch?v=Y9hxSMAWoII (9.66 at 139mph)

'70 Cuda, Plan C....605 Hemi Street Car
https://www.youtube.com/watch?v=WYw6RA-k5Bk (6.25 at 108.75mph)(823hp and still tuning)
https://www.youtube.com/watch?v=3zQEb9uxFng
https://www.youtube.com/watch?v=JCvfzsC4NgM (9.9)
Re: Another Thumperdart Success.....572 Hemi Sized (pics&Vids) [Re: Dragula] #2042296
03/30/16 10:03 PM
03/30/16 10:03 PM
Joined: Jan 2003
Posts: 19,129
Park Forest, IL
slantzilla Offline
I Live Here
slantzilla  Offline
I Live Here

Joined: Jan 2003
Posts: 19,129
Park Forest, IL
Very nice!


"Everybody funny, now you funny too."
Re: Another Thumperdart Success.....572 Hemi Sized (pics&Vids) [Re: Dragula] #2042303
03/30/16 10:11 PM
03/30/16 10:11 PM
Joined: Jan 2005
Posts: 4,243
Charlotte, North Carolina
sgcuda Offline
master
sgcuda  Offline
master

Joined: Jan 2005
Posts: 4,243
Charlotte, North Carolina
Very cool piece. Way to go, Dom!


[image][/image]
Re: Another Thumperdart Success.....572 Hemi Sized (pics&Vids) [Re: sgcuda] #2042338
03/30/16 10:31 PM
03/30/16 10:31 PM
Joined: May 2004
Posts: 11,197
Taxes & Virus's R-US, NY
Dragula Offline OP
I Live Here
Dragula  Offline OP
I Live Here

Joined: May 2004
Posts: 11,197
Taxes & Virus's R-US, NY
Not sure if anyone on here has heard of Jan-Cen Racing or Mike Janis, but those guys are Pro Mod gurus....I saw so many high end blowers and Hemis today all over the shop....Amazing.....

Here are a couple more pics....




************************
A torched Seal 4-Good Exhaust gasket from Rob's motor on the run in stand...Ironic really!*********************************







Last edited by Dragula; 03/30/16 10:33 PM.

'71 Duster 400/512
https://www.youtube.com/watch?v=Znuo3jMUXTk (6.00 at 114.05mph)
https://www.youtube.com/watch?v=Y9hxSMAWoII (9.66 at 139mph)

'70 Cuda, Plan C....605 Hemi Street Car
https://www.youtube.com/watch?v=WYw6RA-k5Bk (6.25 at 108.75mph)(823hp and still tuning)
https://www.youtube.com/watch?v=3zQEb9uxFng
https://www.youtube.com/watch?v=JCvfzsC4NgM (9.9)
Re: Another Thumperdart Success.....572 Hemi Sized (pics&Vids) [Re: Dragula] #2042367
03/30/16 10:51 PM
03/30/16 10:51 PM
Joined: Jan 2011
Posts: 4,754
Utah and Alaska
astjp2 Offline
master
astjp2  Offline
master

Joined: Jan 2011
Posts: 4,754
Utah and Alaska
No stageV intake and dual carbs? Or the Eddy intake with duals?


1941 Taylorcraft
1968 Charger
1994 Wrangler
1998 Wrangler
2008 Kia Rio
2017 Jetta

I didn't do 4 years and 9 months of Graduate School to be called Mister!
Re: Another Thumperdart Success.....572 Hemi Sized (pics&Vids) [Re: astjp2] #2042405
03/30/16 11:28 PM
03/30/16 11:28 PM
Joined: May 2004
Posts: 11,197
Taxes & Virus's R-US, NY
Dragula Offline OP
I Live Here
Dragula  Offline OP
I Live Here

Joined: May 2004
Posts: 11,197
Taxes & Virus's R-US, NY
Originally Posted By astjp2
No stageV intake and dual carbs? Or the Eddy intake with duals?


Ahhh No....You forgot to lend them to us...Still waiting!


'71 Duster 400/512
https://www.youtube.com/watch?v=Znuo3jMUXTk (6.00 at 114.05mph)
https://www.youtube.com/watch?v=Y9hxSMAWoII (9.66 at 139mph)

'70 Cuda, Plan C....605 Hemi Street Car
https://www.youtube.com/watch?v=WYw6RA-k5Bk (6.25 at 108.75mph)(823hp and still tuning)
https://www.youtube.com/watch?v=3zQEb9uxFng
https://www.youtube.com/watch?v=JCvfzsC4NgM (9.9)
Re: Another Thumperdart Success.....572 Hemi Sized (pics&Vids) [Re: Dragula] #2042410
03/30/16 11:37 PM
03/30/16 11:37 PM
Joined: Jul 2004
Posts: 19,201
State of confusion
T
Thumperdart Offline
I Live Here
Thumperdart  Offline
I Live Here
T

Joined: Jul 2004
Posts: 19,201
State of confusion
Originally Posted By Dragula
Well, I probably am leaving out some details, but a friend of mine built a similar engine as mine....And asked if would come down and watch it being dyno'd....Of course I said yes, and brought my Thumperized 1250 Dominator to try if we had time.

Build specs:
572 Hemi
Eddy heads
Solid Mechanical 283 dur @50 .680 lift
9.5:1
World Block
Intake....Depends! But probably a Six Pack.....Yeah, Sixpack Hemi!

-We tried a heavily modified six pack on a Modman intake first...This is Rob's engine, and for anyone who does not know him in the Mopar circles, he IS Mr. Six Pack.....He has been racing these six packs on Wedges for so long, I don't think he could help himself and built one for the Hemi. I was very glad he went with the Modman intake on this build as well.

-First of many pulls was with the sixpack...Lots of tuning went into it on a basic run in stand with an AFR gauge before the dyno, but without a load, its tough....

Best pull with it was 741hp & 666ft/lbs....lots of tuning to get it there. Still needs work as the transition was blubbery with the vacuum carbs coming in...I prefer to run three mechanicals over anything vacuum, but I am sure he will figure it out.






Vid.............:
https://www.youtube.com/watch?v=ueC_4nAdSZ4&feature=youtu.be


Next was the Promax 950 Dyno mule carb he had....Not sure what was done, but we made a bunch of pulls with it changing air bleads, timing, etc and netted a best of 749hp at 704ft/lbs...





Vid.......................:
https://www.youtube.com/watch?v=5QjkTW-o1QY&feature=youtu.be



Now we get to my 1250 G3 Holley that I had Thumperized.....Now it has not had fuel in it since the conversion....It was a 3-circuit and I could not make it work on my 605...Had it converted to 2-circuit, and never touched it!

Fired right up to a perfect idle, and then mad 779hp & 717ft/lbs of torque....No adjustments other than floats....





Vid......................:
https://www.youtube.com/watch?v=M5l_w8n8gbE&feature=youtu.be


Thanks Mike at Jan Cen Racing and Rob Brooks for inviting me....



Thank you so much and glad it worked out for you guys.......... thumbs

Last edited by Thumperdart; 03/31/16 11:28 AM.

72 Dart 470 n/a BB stroker street car `THUMPER`...Check me out on FB Dominic Thumper for videos and lots of carb pics......760-900-3895.....
Re: Another Thumperdart Success.....572 Hemi Sized (pics&Vids) [Re: Dragula] #2042423
03/31/16 12:04 AM
03/31/16 12:04 AM
Joined: Jun 2003
Posts: 9,224
Charleston
S
sixpackgut Offline
Drag Week Mod Champion
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S

Joined: Jun 2003
Posts: 9,224
Charleston
Now that sounds like a fun dyno day


Gen 3 power 6.22@110, 9.85@135
Follow @g3hemiswap on instagram

performance only racing, CRT, ultimate converter, superior design concepts, ThumperCarbs
Re: Another Thumperdart Success.....572 Hemi Sized (pics&Vids) [Re: Dragula] #2042514
03/31/16 05:02 AM
03/31/16 05:02 AM
Joined: Sep 2005
Posts: 526
Deep DEEP SOUTH
LAD 524 Offline
mopar
LAD 524  Offline
mopar

Joined: Sep 2005
Posts: 526
Deep DEEP SOUTH
Nice numbers on a low CR too !!

Re: Another Thumperdart Success.....572 Hemi Sized (pics&Vids) [Re: Dragula] #2042545
03/31/16 08:55 AM
03/31/16 08:55 AM
Joined: Jun 2015
Posts: 227
Northeast Indiana
7
73DAD Offline
enthusiast
73DAD  Offline
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7

Joined: Jun 2015
Posts: 227
Northeast Indiana
Did they do anything special for the exhaust relief on the pistons for the edelbrock heads' different exhaust valve angle? Or was the compression height low enough to make it a non-issue? Awesome motor, box stock head castings or ported?

Re: Another Thumperdart Success.....572 Hemi Sized (pics&Vids) [Re: Dragula] #2042628
03/31/16 11:12 AM
03/31/16 11:12 AM
Joined: Jan 2003
Posts: 1,229
North Central, Indiana
Roughbird72 Offline
pro stock
Roughbird72  Offline
pro stock

Joined: Jan 2003
Posts: 1,229
North Central, Indiana
up NICE!


72 Plymouth Roadrunner 11.08@123.25
Re: Another Thumperdart Success.....572 Hemi Sized (pics&Vids) [Re: Dragula] #2042759
03/31/16 02:46 PM
03/31/16 02:46 PM
Joined: Jul 2010
Posts: 2,419
Pittsburgh PA
Eric Offline
top fuel
Eric  Offline
top fuel

Joined: Jul 2010
Posts: 2,419
Pittsburgh PA
Originally Posted By Dragula
Not sure if anyone on here has heard of Jan-Cen Racing or Mike Janis, but those guys are Pro Mod gurus....I saw so many high end blowers and Hemis today all over the shop....Amazing.....

Here are a couple more pics....




************************
A torched Seal 4-Good Exhaust gasket from Rob's motor on the run in stand...Ironic really!*********************************








My block is there right now..lol


5.53 @ 125 1/8th on the launch control..more left in her!

Re: Another Thumperdart Success.....572 Hemi Sized (pics&Vids) [Re: 73DAD] #2042917
03/31/16 06:59 PM
03/31/16 06:59 PM
Joined: May 2004
Posts: 11,197
Taxes & Virus's R-US, NY
Dragula Offline OP
I Live Here
Dragula  Offline OP
I Live Here

Joined: May 2004
Posts: 11,197
Taxes & Virus's R-US, NY
Originally Posted By 73DAD
Did they do anything special for the exhaust relief on the pistons for the edelbrock heads' different exhaust valve angle? Or was the compression height low enough to make it a non-issue? Awesome motor, box stock head castings or ported?


The eddy heads caused major issues for Rob and how they fit up with the pistons....I know he had to have the pistons re-done multiple times due to the newness of the heads, and ultimately, I think it contributed to the lower compression than what his target was.


'71 Duster 400/512
https://www.youtube.com/watch?v=Znuo3jMUXTk (6.00 at 114.05mph)
https://www.youtube.com/watch?v=Y9hxSMAWoII (9.66 at 139mph)

'70 Cuda, Plan C....605 Hemi Street Car
https://www.youtube.com/watch?v=WYw6RA-k5Bk (6.25 at 108.75mph)(823hp and still tuning)
https://www.youtube.com/watch?v=3zQEb9uxFng
https://www.youtube.com/watch?v=JCvfzsC4NgM (9.9)
Re: Another Thumperdart Success.....572 Hemi Sized (pics&Vids) [Re: Dragula] #2043022
03/31/16 09:13 PM
03/31/16 09:13 PM
Joined: Nov 2004
Posts: 6,890
North Alabama
M
Monte_Smith Offline
master
Monte_Smith  Offline
master
M

Joined: Nov 2004
Posts: 6,890
North Alabama
Predictable results from the selected carb and manifold combinations. Six Pack was actually closer to Dominator than I thought it would be. Would have been interesting to try single top on Mod Man, just to see results. But would only be a research project as doubt anybody would use one for that

Re: Another Thumperdart Success.....572 Hemi Sized (pics&Vids) [Re: Monte_Smith] #2043116
03/31/16 10:09 PM
03/31/16 10:09 PM
Joined: May 2004
Posts: 11,197
Taxes & Virus's R-US, NY
Dragula Offline OP
I Live Here
Dragula  Offline OP
I Live Here

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Posts: 11,197
Taxes & Virus's R-US, NY
Originally Posted By Monte_Smith
Predictable results from the selected carb and manifold combinations. Six Pack was actually closer to Dominator than I thought it would be. Would have been interesting to try single top on Mod Man, just to see results. But would only be a research project as doubt anybody would use one for that


I actually thought the Dominator was too big for this motor, but I had it sitting on the shelf waiting for my 605 to be finished up. AFR on his motor was right around 12.7-13.0 and he used ethanol free fuel. So it seemed right in the ball park and we just left it that way.

What you can't see is how bad the six pack was where the outboards opened in the mid range. The AFR jumped all over when the opened. A couple of the pulls it was real noticeable. I do not have a copy of the dyno sheets, but you might be able to hear it in the vid. It stumbled every-time. The more we messed with it, the more it seemed to get a tad worse. First pull was the best. And the engine was the coolest. Bringing it earlier seemed better. It did make the Hp though....I would loved to have tried three center carbs.

Last edited by Dragula; 03/31/16 10:10 PM.

'71 Duster 400/512
https://www.youtube.com/watch?v=Znuo3jMUXTk (6.00 at 114.05mph)
https://www.youtube.com/watch?v=Y9hxSMAWoII (9.66 at 139mph)

'70 Cuda, Plan C....605 Hemi Street Car
https://www.youtube.com/watch?v=WYw6RA-k5Bk (6.25 at 108.75mph)(823hp and still tuning)
https://www.youtube.com/watch?v=3zQEb9uxFng
https://www.youtube.com/watch?v=JCvfzsC4NgM (9.9)
Re: Another Thumperdart Success.....572 Hemi Sized (pics&Vids) [Re: Dragula] #2043148
03/31/16 10:35 PM
03/31/16 10:35 PM
Joined: Nov 2004
Posts: 6,890
North Alabama
M
Monte_Smith Offline
master
Monte_Smith  Offline
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M

Joined: Nov 2004
Posts: 6,890
North Alabama
No way the Dominator is too big for a motor that size

Re: Another Thumperdart Success.....572 Hemi Sized (pics&Vids) [Re: Monte_Smith] #2043166
03/31/16 10:47 PM
03/31/16 10:47 PM
Joined: Jul 2004
Posts: 19,201
State of confusion
T
Thumperdart Offline
I Live Here
Thumperdart  Offline
I Live Here
T

Joined: Jul 2004
Posts: 19,201
State of confusion
I`m w/you, maybe 2 1050`s on a sheet metal intake....... work


72 Dart 470 n/a BB stroker street car `THUMPER`...Check me out on FB Dominic Thumper for videos and lots of carb pics......760-900-3895.....
Re: Another Thumperdart Success.....572 Hemi Sized (pics&Vids) [Re: Dragula] #2043252
04/01/16 12:16 AM
04/01/16 12:16 AM
Joined: Jun 2003
Posts: 52,807
Romeo MI
MR_P_BODY Offline
Master
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Master

Joined: Jun 2003
Posts: 52,807
Romeo MI
I know Mike very well.. surprised you didnt jet up
on that 1250... all in all a good day on the dyno
congrats
wave

Re: Another Thumperdart Success.....572 Hemi Sized (pics&Vids) [Re: MR_P_BODY] #2222150
12/28/16 12:16 PM
12/28/16 12:16 PM
Joined: May 2004
Posts: 11,197
Taxes & Virus's R-US, NY
Dragula Offline OP
I Live Here
Dragula  Offline OP
I Live Here

Joined: May 2004
Posts: 11,197
Taxes & Virus's R-US, NY
Bump to keep from being bored...


'71 Duster 400/512
https://www.youtube.com/watch?v=Znuo3jMUXTk (6.00 at 114.05mph)
https://www.youtube.com/watch?v=Y9hxSMAWoII (9.66 at 139mph)

'70 Cuda, Plan C....605 Hemi Street Car
https://www.youtube.com/watch?v=WYw6RA-k5Bk (6.25 at 108.75mph)(823hp and still tuning)
https://www.youtube.com/watch?v=3zQEb9uxFng
https://www.youtube.com/watch?v=JCvfzsC4NgM (9.9)
Re: Another Thumperdart Success.....572 Hemi Sized (pics&Vids) [Re: Dragula] #2222158
12/28/16 12:28 PM
12/28/16 12:28 PM
Joined: Aug 2009
Posts: 1,057
Ohio
J
jlatessa Offline
super stock
jlatessa  Offline
super stock
J

Joined: Aug 2009
Posts: 1,057
Ohio
I always felt that six packs were better suited to wedges due to port arrangement and 2 fours better suited to Hemis.

Just my 2 cents...Joe

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