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09-08-2011, 09:23 PM
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CC Member
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Join Date: Mar 2009
Cobra Make, Engine: FFR
Posts: 388
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Not Ranked
Rousch #1, no doubt dyno numbers are mainly a tuning guide. Mustang dyno's usually read lower than a dynojet, but at least they are rwhp ratings. Flywheel hp ratings don't take into account drivetrain loss, much less loss from sidepipe restriction. Look at the Daytona Coupe replica's, they get killed on rwhp due to sidepipe restriction. A better measure is mph in the 1/4, that will usually give a better guide of what power a combo is making. Cheers.
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09-08-2011, 11:25 PM
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CC Member
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Join Date: Aug 2008
Cobra Make, Engine:
Posts: 1,106
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Not Ranked
Quote:
Originally Posted by AL427SBF
Thought it would be nice to see what kind of power the small block guys are getting these days. If you are one of them and don't mind sharing I would be curious to see what the range in HP & Torque is. Filling out the table below will help put it all in context, thanks for your input.
Other: Anything else "trick" you have above and beyond a street performance motor.
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Displacement: 369
Block Type: Dart
Compression Ratio: 10.5
Caburetor Size/EFI: massflo efi tb
Peak Crank HP @ RPM: 435 rwhp
Peak Torque @ RPM: 512ft/lbs @ wheels @ 3000
Trick Flow fac 190 heads, tko 600 road race, 9"diff 3.7:1 posi track lsd. Michelin slicks 27/65/18 & 30/65/18 1200kg street registered. |
09-09-2011, 06:03 AM
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CC Member
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Join Date: Apr 2011
Posts: 1,092
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Not Ranked
As far as dynos go, might as well get it done right which is part of the tuning process. Many*different types of dynos out there, but only one gold standard (my opinion) - the Dynapack*4000. Just bolt the rear hubs to those tightly calibrated servos,*read your exhaust gasses during pulls, and*adjust the ignition and fuel delivery system for absolute optimum performance across the RPM range.
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09-09-2011, 08:12 AM
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CC Member
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Join Date: Aug 2000
Location: Houston, Texas, U.S.,
Posts: 87
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Not Ranked
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09-09-2011, 07:17 PM
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CC Member
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Join Date: Mar 2006
Cobra Make, Engine:
Posts: 72
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Not Ranked
402w
my 402w made 562HP and 535 ft lbs of torque under 6000 rpms...
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09-09-2011, 09:20 PM
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CC Member
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Join Date: Dec 2010
Location: Tempe,AZ-High Point,NC,
AZ
Cobra Make, Engine: Kirkham #684, 482FE, Mike Mccluskey build
Posts: 2,520
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Not Ranked
Quote:
Originally Posted by JEwalt
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They want $40,000 it is all aluminium, they dont have any yet, and it will only be sold through Dendeste. Looks cool.
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PRIDEnJOY
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09-10-2011, 03:42 AM
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CC Member
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Join Date: Jul 2009
Location: Redland Bay,
QLD
Cobra Make, Engine: Harrison #100 under construction
Posts: 1,109
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Not Ranked
Quote:
Originally Posted by AL427SBF
Makes sense, down the road I may look into a "small" supercharger setup. Not a dedicated fulltime unit but something I can turn-on if I want a kick in the pants. Don't know they even make such a thing and it would have to be SMALL so as to fit under the hood and pull from the stock scoop. I think Mel Gibson had that setup in his Police Persuit mustang? in Mad Max. Always liked the idea of hitting a switch to spool that baby up. Probably not the best bang for the buck either, added weight and a parasitic drain until you're spun up.
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Mel's car actually is a XA-XC Falcon Interceptor Coupe. Look up Australian Fords for a bit more info. I understand that there are quite a few in the States 
Rog
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Rog 246
Harrison #100
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09-15-2011, 04:32 PM
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CC Member
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Join Date: Sep 2011
Location: Oxford,
CT
Cobra Make, Engine:
Posts: 5
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Not Ranked
SBF specs
Displacement: 347CI
Block Type: Ford Boss 8.2 deck
Compression Ratio: 10:1 +/-
Caburetor Size/EFI: 750 Barry Grant RR Demon DP
Peak Crank HP @ RPM: 482@6300 (avg 384 from 3500 - 6600)
Peak Torque @ RPM: 430@5300 (avg 414 from 3500 - 6200)
Other: Anything else "trick" you have above and beyond a street performance motor.
Basically took a new Ford Racing 450hp 347 and dropped at my engine builders shop. Complete blue print, about 5 hrs short turn radius work on heads, port match and cleanup. True decks to give comp a slight bump. Reassembled with all original parts with exception of Melling Select pump, MLS head gaskets and Aviaid GT40 pan. Very mild tune running right at 12a/f with 35 degrees timing all in by 3200 rpms. Water temp 178, oil temp 190. No doubt we could have gotten to 500hp if we leaned on it a little more.
5000 trouble free and fun miles since build completed in July 2010.
Currently building 363ci using basically same parts with exception of h-beam rods, internal balance, higher quality pistons, 11:1 cr and mid level solid roller. Hoping for 550-575hp with a usable RPM range up to 7200. Considering new Edelbrock XT FI for this engine.
High revving small blocks are a blast in these cars.
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09-15-2011, 05:12 PM
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CC Member
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Join Date: Dec 2010
Location: Tempe,AZ-High Point,NC,
AZ
Cobra Make, Engine: Kirkham #684, 482FE, Mike Mccluskey build
Posts: 2,520
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Not Ranked
Smalls blocks rule road racing and now with turbo charging being so effective they run the strip also.
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PRIDEnJOY
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09-15-2011, 05:19 PM
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CC Member
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Join Date: Dec 2001
Location: Louisville,
KY
Cobra Make, Engine: I'm Cobra-less!
Posts: 9,415
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Not Ranked
Force fed small block horsepower = naturally aspirated big block horsepower.  |
09-15-2011, 06:30 PM
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CC Member
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Join Date: Dec 2010
Location: Tempe,AZ-High Point,NC,
AZ
Cobra Make, Engine: Kirkham #684, 482FE, Mike Mccluskey build
Posts: 2,520
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Not Ranked
Quote:
Originally Posted by blykins
Force fed small block horsepower = naturally aspirated big block horsepower. |
You do have a good point.
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PRIDEnJOY
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09-15-2011, 07:09 PM
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CC Member
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Join Date: Apr 2011
Posts: 1,092
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Not Ranked
Quote:
Originally Posted by fordracing65
You do have a good point.
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Isn't that what David said to Goliath before the **** hit the fan? |
11-19-2011, 12:00 PM
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CC Member
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Join Date: Nov 2011
Location: NW Ohio,
OH
Cobra Make, Engine:
Posts: 1
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Not Ranked
Quote:
Originally Posted by AL427SBF
Makes sense, down the road I may look into a "small" supercharger setup. Not a dedicated fulltime unit but something I can turn-on if I want a kick in the pants. Don't know they even make such a thing and it would have to be SMALL so as to fit under the hood and pull from the stock scoop. I think Mel Gibson had that setup in his Police Persuit mustang? in Mad Max. Always liked the idea of hitting a switch to spool that baby up. Probably not the best bang for the buck either, added weight and a parasitic drain until you're spun up.
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The supercharger on Mel's car was not real. Was a hollowed out blower witha pulley for looks. |
11-21-2011, 06:40 PM
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CC Member
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Join Date: Oct 2002
Location: CONOVER,
NC
Cobra Make, Engine: Factory 5
Posts: 110
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Not Ranked
This is the writeup of my engine that came with the car.
It is a built 302 bored .020 over and makes a dyno tested 331hp at 5900 rpm and 324ft./lb. of torque at 4500 rpm. The machined block is equipped with a balanced rotating assembly complete with SRP forged flat top pistons and shot peened connecting rods. Next, a Comp Cams XE274HR camshaft and Air Flow Research 185cc aluminum heads with Comp Cams roller rockers were bolted up. Then an Edelbrock Performer RPM intake topped with a Holley Street Avenger carburetor finished things off. An MSD ignition system complete with both an MSD distributor and MSD coil provides the spark.
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The trouble with retirement is that I never get a day off!
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12-23-2011, 07:59 AM
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CC Member
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Join Date: Dec 2009
Location: Valdosta,
Ga
Cobra Make, Engine: FFR with Dart Iron Eagle 408w motor with AFR 225 heads and 83mm turbo, 924rwhp, 986rwtq
Posts: 13
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Not Ranked
Dyno tune with Steve Petty.wmv - YouTube This is my dyno video of my turbo charged FFR / 924rwhp/ 986rwtq at 18 psi
Last edited by 2FastCobra; 12-23-2011 at 08:12 AM..
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12-23-2011, 08:05 AM
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CC Member
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Join Date: Dec 2009
Location: Valdosta,
Ga
Cobra Make, Engine: FFR with Dart Iron Eagle 408w motor with AFR 225 heads and 83mm turbo, 924rwhp, 986rwtq
Posts: 13
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Not Ranked
Displacement: 408w
Block Type: Dart Iron Eagle
Compression Ratio: 9:1
Caburetor Size/EFI: 120 #/hr injectors
225 AFR race heads, 83mm BW turbo with race cover 18psi = 924rwhp / 986rwtq the car is now making 22-23 psi http://www.clubcobra.com/forums/pict...pictureid=6856 |
12-23-2011, 11:43 AM
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CC Member
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Join Date: Dec 2010
Location: Tempe,AZ-High Point,NC,
AZ
Cobra Make, Engine: Kirkham #684, 482FE, Mike Mccluskey build
Posts: 2,520
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Not Ranked
I love the 120 pound injectors, mine are 46  .
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PRIDEnJOY
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12-23-2011, 01:00 PM
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Senior Club Cobra Member
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Join Date: May 2001
Location: Florence,
AL
Cobra Make, Engine: RCR GT 40 & 1966 Fairlane 390 5 speed
Posts: 4,511
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Not Ranked
408 w
I picked up a 408 from Keith Craft yesterday to go into a B&B Cobra. 531 hp at 5700 and 540 tq at 4300.
Great street motor.
Dwight
__________________
''Life's tough.....it's even tougher if you're stupid.'' ~ John Wayne
"Happiness Is A Belt-Fed Weapon"
life's goal should be; "to be smarter than inanimate objects"
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12-26-2011, 03:43 PM
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CC Member
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Join Date: Apr 2010
Location: Severna Park,
MD
Cobra Make, Engine: Ford 289
Posts: 50
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Not Ranked
My engine numbers
Displacement: 333 (331 w/.040 bore)
Block Type: 5 bolt 289
Compression Ratio: 10.6
Caburetor Size/EFI: 680 Holly XE
Peak Crank HP @ RPM: 392 @ 5900
Peak Torque @ RPM: 401 @ 4200
Other "trick" parts:
custom cam, TW 170 heads, TRY-Ys, Eddy performer RPM, custom curved distributor, 2.5" exhausts, Jacobs ignition.
My numbers are RWHP and RWTQ based on chassis Dyno results. This build makes 17" of vac and is very happy, idling at 900 Rs.
Merry Christmas all!
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Ken
Severna Park, Md
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