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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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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. |
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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Check out this aluminum 351W/427 "hemi"
757 hp 612 ft.lbs. Shelby/DenBeste 427 (Click image for more details) - DenBeste Motorsports Store |
402w
my 402w made 562HP and 535 ft lbs of torque under 6000 rpms...
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Rog |
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. |
Smalls blocks rule road racing and now with turbo charging being so effective they run the strip also.
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Force fed small block horsepower = naturally aspirated big block horsepower. ;)
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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. |
Dyno tune with Steve Petty.wmv - YouTube This is my dyno video of my turbo charged FFR / 924rwhp/ 986rwtq at 18 psi
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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 |
I love the 120 pound injectors, mine are 46 :mad:.
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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 |
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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