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587 HP 360
#1361917
12/30/12 11:03 PM
12/30/12 11:03 PM
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Joined: Jul 2012
Posts: 429
Washington
skrews
OP
mopar
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OP
mopar
Joined: Jul 2012
Posts: 429
Washington
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Thought everyone would like this one.
Goal was for 10 sec pump gas non stroker 360.
1990 roller block tall filled, ARP main studs, line honed, square decked to .003 under.
Std volume oil pump, full groove mains, moroso deep pan. Milodon SB Chevy full legnth windage screen modified to fit
Eagle cast crank, H-beam rods, JE flat tops. 10.1:1 comp.
Crower solid roller cam .712/.712 lift 249*/254* @.050 108 sep 4* advanced
CNC ported IndyBrock heads with revised VJ and valves
Indy claimed flow #s / Actual OOTB#s / after my VJ and Ferrea valves
.100 72/66 w/o pipe... 59/49 w/pipe......... 65/49 w/pipe
.200 132/113 ......... 123/108 ............ 150/113
.300 197/145.......... 180/150 .............204/155
.400 248/170 ......... 229/178............. 248/184
.500 277/183 ......... 261/194 ............ 280/206
.600 302/191.......... 284/208 .............292/215
.700 306/197...........284/215............. 287/222
tested @ 28" ON SUPERFLO 1020 bench ( this bench has found to be very conservative )
950 Holley Ultra HP
Super Victor intake port matched 3" in to port maintaining proper port taper, no plenum work, 1" taper spacer
1.75 Hooker headers 3'X17" extensions
587 HP @ 6900 511 TQ @ 5200
Also tested RPM AirGap again port matched 3" into port. 1" open spacer
541 HP @ 6300-6400 508 TQ @ 4500-4600
Best in car performance
60' 1.534 330 4.452 1/8 6.95 @ 98.2 1000' 9.129 1/4 10.97 @ 122.1
3400 lbs Duster 904 w/low 1st gear 4500 stall 8" vert, 4.30 gear 28" tire 1100 ft. DA
going threw traps at 6600-6700, should be 7000+
swapped to 4.56 gear
don't think its got near enough converter should have about a 5800-6000 IMO
should have a 5800ish ATI converter for next season
hoping to get this thing in the mid tens on 91 pump and 365 ci
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Re: 587 HP 360
[Re: skrews]
#1361922
12/30/12 11:37 PM
12/30/12 11:37 PM
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Joined: Jan 2004
Posts: 13,247
Mt. Vernon, Ohio
dartman366
I Live Here
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I Live Here
Joined: Jan 2004
Posts: 13,247
Mt. Vernon, Ohio
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I had a 4800 stall TCI that was behind my 365, X headed non stroker and it went 11.18 @118.5 in my 3200# dart at the time,,so yeah, that converter is hurting you,,also I switched from a low first gear 904 to a std first gear and actually picked up some 60ft time and helped down track. 
Light travels faster than the speed of sound,,,this is why some people seem bright untill you hear them speak.
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Re: 587 HP 360
[Re: Eric]
#1361923
12/30/12 11:40 PM
12/30/12 11:40 PM
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Joined: Jan 2003
Posts: 9,826
las vegas
70AARcuda
master
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master
Joined: Jan 2003
Posts: 9,826
las vegas
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even with the tight converter you think the mph would be up higher..
122mph is about right for a 10.90s pass...
Tony
70 AARCuda Vitamin C
71 Dart Swinger 360 10.318 @ 128.22(10-04-14 Bakersfield)
71 Demon 360 10.666 @122.41 (01-29-17 @ Las Vegas)
71 Duster 408 (10.29 @ 127.86 3/16/19 Las Vegas)
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Re: 587 HP 360
[Re: pittsburghracer]
#1361925
12/31/12 07:12 AM
12/31/12 07:12 AM
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Joined: Jul 2012
Posts: 429
Washington
skrews
OP
mopar
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OP
mopar
Joined: Jul 2012
Posts: 429
Washington
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Quote:
Pretty sure the Indybrocks come with a 2.05 valve. When you upgraded the valves did you stick with that size or jump up to a 2.08 valve. When I see a head stall like that on a flowbench and start backing up its usually a high airspeed issue. I'll bet its well over 400fps over the short-turn. With your 712 lift cam you are well into the affected area. The flow numbers you posted are in the area of what a ported set of heads with a 2.02 valve usually end up with. A 5200-5500 stall convertor would really help out at that weight (3400). I don't know how you guys make a small-block Duster weigh that much. 
Used 2.055 Ferrea hollow stem int. and 1.6 24* tulip exh. The few other worked over Eddy sbm castings flowed on this bench didn't flow as good as these, and they all supposedly flowed over 300. One set by Shadey Dell, another by some guru I never heard of, and a set of cnc ported non offset rocker castings.
I didn't check, but I imagine the lift at the valve is less than theoretical after .014 lash and .030 or so from the 59* lifter angle loss and parts deflection. Likely seeing .670ish lift which is just about where the head stalled (.650).
All steel car and a fat guy behind the wheel=heavy sled. 
Hopefully the car and the driver lose some weight this winter.
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Re: 587 HP 360
[Re: skrews]
#1361927
12/31/12 07:40 AM
12/31/12 07:40 AM
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Joined: Mar 2007
Posts: 3,300
Northern Indiana
Dunnuck Racing
master
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master
Joined: Mar 2007
Posts: 3,300
Northern Indiana
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Can you post up your dyno sheet? Not trying to take a dig at you,but the calculator I use comes up with closer to 500 hp based on your performance and weight . Just curious as to what the entire pull looks like,your peak numbers come in around the correct rpm for the port volume and cam used from what I can see. Depending on how efficient your converter is,you may lose a little mph going to a higher stall.  Keith
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Re: 587 HP 360
[Re: pittsburghracer]
#1361929
12/31/12 12:41 PM
12/31/12 12:41 PM
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Joined: Jan 2003
Posts: 11,716
Portage,michigan
B3422W5
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 11,716
Portage,michigan
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Quote:
Pretty sure the Indybrocks come with a 2.05 valve. When you upgraded the valves did you stick with that size or jump up to a 2.08 valve. When I see a head stall like that on a flowbench and start backing up its usually a high airspeed issue. I'll bet its well over 400fps over the short-turn. With your 712 lift cam you are well into the affected area. The flow numbers you posted are in the area of what a ported set of heads with a 2.02 valve usually end up with. A 5200-5500 stall convertor would really help out at that weight (3400). I don't know how you guys make a small-block Duster weigh that much.
My old car( 70 Duster), at one time weighed 3400 or a hair more, 300 pound driver, mild steel cage, all steel car, frame connectors, bench seat, etc, etc. Real easy to weigh that much in an all steel caged car, especially with a 100 pound bench seat in it.
Had it across the scales at multiple tracks.
btw, i agree with Keith, i would expect a 587 horsepower car at that weight with a 904 to run 10.40's sorted out.
Last edited by B3422W5; 12/31/12 12:48 PM.
69 Dart GTS A4 Silver All steel, flat factory hood, 3360race weight
418 BPE factory replacement headed stroker, 565 lift solid cam
Best so far, 10.40 @127 1/4
1.41 best 60 foot
6.60 at 103.90 1/8
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Re: 587 HP 360
[Re: B3422W5]
#1361930
12/31/12 01:52 PM
12/31/12 01:52 PM
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Joined: Feb 2005
Posts: 20,180
PA.
pittsburghracer
"Little"John
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"Little"John
Joined: Feb 2005
Posts: 20,180
PA.
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I keep forgetting about all us fat drivers. Matts duster weighted 3050# without him at Norwalk. All steel 1970 duster except a real heavy 6 pak fiberglass hood. Caged (not moly), frame connectors, 727, rear seat, one stock bucket seat and one race seat, spare wheel tub removed but replaced with steel floor, full 12 gallon fuel cell, stock glass and non lightened steel doors, caltracs and springs.
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: 587 HP 360
[Re: pittsburghracer]
#1361931
12/31/12 02:00 PM
12/31/12 02:00 PM
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Joined: Jan 2003
Posts: 11,716
Portage,michigan
B3422W5
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 11,716
Portage,michigan
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Quote:
I keep forgetting about all us fat drivers. Matts duster weighted 3050# without him at Norwalk. All steel 1970 duster except a real heavy 6 pak fiberglass hood. Caged (not moly), frame connectors, 727, rear seat, one stock bucket seat and one race seat, spare wheel tub removed but replaced with steel floor, full 12 gallon fuel cell, stock glass and non lightened steel doors, caltracs and springs.
Sounds about right....mine had the back seat, front bench, factory hood, full factory gas tank, s/s springs,727, stock brakes all around, and my big butt in it.....lol
69 Dart GTS A4 Silver All steel, flat factory hood, 3360race weight
418 BPE factory replacement headed stroker, 565 lift solid cam
Best so far, 10.40 @127 1/4
1.41 best 60 foot
6.60 at 103.90 1/8
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Re: 587 HP 360
[Re: B3422W5]
#1361932
12/31/12 02:11 PM
12/31/12 02:11 PM
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Joined: Feb 2009
Posts: 1,532
off the grid
340B5
pro stock
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pro stock
Joined: Feb 2009
Posts: 1,532
off the grid
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Thats the first under 400 inch combo w/Indybrocks I've seen that runs good. Too much head for a basicly stock 340 IMO. I agree, a 5300-5500 converter would help.
Who ported the Indybrocks?
Yeah, it's got a smallblock.
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Re: 587 HP 360
[Re: skrews]
#1361933
12/31/12 02:54 PM
12/31/12 02:54 PM
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Joined: Jul 2010
Posts: 2,091
Delray beach, Florida
Performance Only
top fuel
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top fuel
Joined: Jul 2010
Posts: 2,091
Delray beach, Florida
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I would have to wonder if something had changed since the dyno tuning. If it truely makes 587 HP, i would think you'd be considerably quicker and a bit more MPH. The performance indicates it's more like 500-510 REAL HP.
machine shop owner and engine builder
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Re: 587 HP 360
[Re: Performance Only]
#1361935
12/31/12 04:45 PM
12/31/12 04:45 PM
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Joined: Jan 2003
Posts: 5,894
Florida
Locomotion
master
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master
Joined: Jan 2003
Posts: 5,894
Florida
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Is it just me or does anyone else feel that there is too much "big stuff" for only 365 cubic inches under 7,000? I had to re-read the cam lift! If you don't have enough cubes and rpm to get the velocity up in all the "big openings", it's not going to fill the cylinders efficiently. Peak HP numbers aren't as important as the "area under the curve" to accellerate the car. More torque is needed. I agree 100% that a looser converter will help. I can't help but wonder if the Air-Gap would actually help accelleration more than the Super Victor. But I'm sure changes would be required to optimize the carb for the different intake. At the track, jet for mph and pump cams & squirters for 60'. Sorry, but just trying to offer some constructive criticism.  I've never had an engine on a dyno and am use to spec limits. But I've found that leaning on the conservative side with specs tends to produce better results than the other way.
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