Is there something special going on here, or have I just not seen enough 347 motors in my research? most folks seem to advertise 347 EFI as ~420hp. 503hp seems like quite a jump.
inflated numbers, high quality, reduced life, magic badgers?
i prefer to see a bit more torque with HP being a close 2nd
the heads and cam probably
edlebrock is poken more on SBF now i see
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MK3.1 #6945 her name is Buffy
p/u 04/04/09 roller 08/27/09
start-up Pearl Harbor Day 12/07/10
go-cart Memorial Day 2011
body on 11/11/11 Veterans Day
all legal except paint 02/12/12
372w handbuilt
That peek HP is over the 5250 RPM range. I would like to see what the torque numbers are in the 3800 RPM to 4800 RPM range. As to the price you have to take into consideration that it does include EFI.
Don
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FFR-4000, CHP 408ci./600hp, Wayne's Stack F.I. & Tec-3, T-600, IRS, Smith gauges, 17" Pin-Drive wheels, Whitby's rag top & paint by Ken Pike (SRP).
Edelbrock does not have a dyno graph uploaded for this engine yet, but the secret appears to be in the combo of the pump friendly 9.9:1 comp, hydraulic roller cam, CNC ported heads and the unique for a SBF XT intake manifold;
Hi,
They are sacrificing some low end for big #'s, the cam will be 3500 to 7000 so you'll have to have some steep gears. 10* less duration would make it more street friendly.
Perry.
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Started Dec 1/07 and on the road Sept /09.
Candy blue with metalic silver stripes,clearcoat wetsanded to 2000 grit.
331 Stroker,"CNC" Keith Craft Brodix heads, HP=ALOT, tremec 5 speed, 3.73 Traction Lock, 4 wheel power disc brakes. Koni coilovers, A/C, Glass Hatch, carpet, Kirkey seats, Leather Wheel,180 mph reverse speedo, Sony system,18" cobra wheels, wide M/T on the rear, Eagle F1 tires, single Magnaflow exhaust with heat shields.
Twin Turbos are installed:) HP=ALOT + 60% more.
they must be running the motor to 7000 to get those HP numbers with 10 to 1 CR. That would be great for the track. Sucks for a street car. You would need a close ratio box and fairly low rear gears, 3:73s. The torque seems really high for a 347. I have low 400's in torque. torque is cubic is inches and compression ratio, mathematically doesn't make sense to me.
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FFR3842, Levy Forged 349ci/500hp, AFR185's, Wilwood 6/4 piston Superlites, Koni DAs, Magnesium bellhousing and Tilton Triple disk clutch, GF5R dog ringed 5 speed, 3link, VPM sway bars, Hoosier A6s, CCW forged wheels, wings, undertray, diffuser
On my 347, we had 452hp and 427tq on the dyno with Performer RPM cam and heads.
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FFR 6872 base kit with 92' donor. 5.0L EFI T5 3.73 4 links.Tubular LCA. 4 wheel disc.
Feb14 2009 Pick up .
May 02 2009 Start build.
July22 2009 Roller.
July 25 2009 Motor in.
August 10 2009 Motor running !
October 18 2009 Gokart ! http://www.youtube.com/watch?v=uhni-JPOnNs
June 1 2010 Paint shop.
July 22 On the road !
Winter 2010: Motor upgrade 347-Powerjection III
Summer 2012: spun bearing
Spring 2013: Built myself a new engine.(with a bigger oil pan)
On my 347, we had 452hp and 427tq on the dyno with Performer RPM cam and heads.
thanks for the comparison! do you have a chart? or at least, can you describe what the chart looks like, and perhaps some details about your gear ratios/driving characteristics?
Everyone had the right idea, it hits 503hp right at (redline)6500 RPM, and the first part of the torque curve is kinda low. Peak torque at 5000RPM. I'll steer away from those cams, but good to see that this setup can breathe well enough.
You can make lots of power with the right combo. You do pay for it down low, but I launch at ~3000 anyway. Here are a couple of articles that show great #'s from sbf's 527 HP 347 ci AFR 185 cc 535 HP 331ci AFR 185cc
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FFR 4816, non-donor build, 331, 4 into 4\'s, fuel injection, tremech 3550, 3.55 grears, Silver dual rollbars. Just waiting for boost!
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#6945
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