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 5Likes
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1
Post By Dwight
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1
Post By Three Peaks
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1
Post By jhv48
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2
Post By Cobra #3170
02-14-2016, 05:23 PM
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CC Member
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Join Date: Feb 2016
Location: North of London,
UK
Cobra Make, Engine: AC Cars Limited, 302 EFI
Posts: 204
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Not Ranked
Anybody's 347 sound like this?
http://youtu.be/RRBbjOSID_s
I know it's a 427 BB of course, but can a 347 be configured to sound like this?
If so what spec please, for example:
Cam?
Compression?
Heads?
Valve size?
Carb size or EFI?
Anything else?
Many Thanks!
Last edited by AC Ventura; 02-14-2016 at 05:29 PM..
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02-14-2016, 06:10 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
Yes
mine was EFI
195 Brodix heads CNC by Keith Craft
80 mm Victor intake
90 mm mass air
80 mm throttle body
Comp cam 35-518-8 2.02 valve .555/.565 lift but with the 1.7 Scorpion roller rockers = .590/.595 lift
274/282
224/232 with a 112 lobe separation
EEIV processor with SCT chip, Ford distributor
10.67 compression
1 5/8 equal length header with 3" Classic Cobra Pack side pipes.
402 rear wheel hp and 422 rwtq
350 rwtq at 2300 rpms
__________________
''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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02-15-2016, 01:21 AM
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CC Member
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Join Date: Feb 2016
Location: North of London,
UK
Cobra Make, Engine: AC Cars Limited, 302 EFI
Posts: 204
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Not Ranked
Thanks for that Dwight.
Is this the motor you said got 20 mpg?
I've been looking at Keith Crafts Street and Street Perfomance 347, both carbed. Do you think they'd sound similar?
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02-15-2016, 04:19 AM
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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: 9,417
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Not Ranked
You can reproduce the lope from engine to engine, as it's a function of the camshaft. You can also reproduce how *hard* an engine hits as it's a function of exhaust and compression ratio.
However, you can't reproduce the same tone because a big inch motor sounds completely different than a small inch motor. A 347 and a 427 are 80 cubic inches apart and you can tell the difference from that.
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02-15-2016, 04:54 AM
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CC Member
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Join Date: Apr 2009
Location: Little Rock area,
AR
Cobra Make, Engine: ERA Street Roadster #782 with 459 cu in FE KC engine, toploader, 3.31
Posts: 4,519
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Not Ranked
Can the BB ignition firing order be replicated with the 347? Seems I remember one of the SB series was wired the same as an FE, but I forget which one - Windsor, Cleveland or both?
Apparently Patrick, with his tuning fork trained ear lobes can readily distinguish between them.  |
02-15-2016, 04:55 AM
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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: 9,417
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Not Ranked
OLD 289/302's had a 15426378 order, which is the same as an FE. However, the sheer size (both physically and displacement-wise) will add to the sound.
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02-15-2016, 06:19 AM
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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
yes 20 mpg
people would asked "is that a 427?" and I would asked "what do you think?" they always said "yes"
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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04-15-2016, 08:30 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
video
here is a KC 408 idling in front of my shop while I lock the doors.
https://youtu.be/_qv-9DawYs0
__________________
''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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04-16-2016, 09:21 AM
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CC Member
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Join Date: Jan 2005
Location: Hillsboro,
OR
Cobra Make, Engine: Scratch built CSX style frame, Carbon fiber body, 393 Stroker, T-bird IRS, T5
Posts: 1,623
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Not Ranked
My 393 sounds a lot like that but doesn't have the very low end grumble. It sounds awful sweet to me as it's winding through the gears.
Besides the specs as described above, I think picking the right side pipes goes a long way to getting the sound you want. Our club has a large mix of different Cobras and they all sound different. Some of the big blocks are some of the quietest of the bunch, mostly because of the pipes, IMHO.
Bob
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04-16-2016, 09:39 AM
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CC Member
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Join Date: Aug 2007
Location: Carlsbad,
Ca
Cobra Make, Engine: SPF 2932 with 438 Lykins Motorsports engine. Previous owner of FFR 5452.
Posts: 2,616
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Not Ranked
Quote:
Originally Posted by Dwight
yes 20 mpg
people would asked "is that a 427?" and I would asked "what do you think?" they always said "yes"
Dwight
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And we used to jump all over Real1 for this same reason.
PS, I did the same thing when I had a 302 in my FFR.
__________________
Jim
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04-16-2016, 09:41 AM
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CC Member
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Join Date: Aug 2007
Location: Carlsbad,
Ca
Cobra Make, Engine: SPF 2932 with 438 Lykins Motorsports engine. Previous owner of FFR 5452.
Posts: 2,616
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Not Ranked
Quote:
Originally Posted by Dwight
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That sounds a lot like the first few seconds of "Hot For Teacher" by Van Halen.
__________________
Jim
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04-16-2016, 10:27 AM
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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: 9,417
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Not Ranked
Sounds like the idle speed is too low to me.....
They all will "Dairy Queen" like that if they're idling at 700 rpm....LOL
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04-17-2016, 02:58 AM
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CC Member
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Join Date: May 2008
Location: Brisbane,
QLD
Cobra Make, Engine:
Posts: 2,797
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Not Ranked
Quote:
Originally Posted by jhv48
That sounds a lot like the first few seconds of "Hot For Teacher" by Van Halen.
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Yes, it does, once you get in your head, LOL.
Quote:
Originally Posted by blykins
Sounds like the idle speed is too low to me.....
They all will "Dairy Queen" like that if they're idling at 700 rpm....LOL
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Yes, idling way too slow.
Would sound much better picked up by 200 rpm. |
04-19-2016, 08:13 AM
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CC Member
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Join Date: Jan 2016
Location: Hot Springs,
AR
Cobra Make, Engine: Backdraft
Posts: 34
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Not Ranked
Cubic Inch, Camshaft, Compression, Idle Speed, and Timing will all affect the sound of the engine. Getting that sound is not an issue. We use custom grind camshafts on all engines, the specs vary depending on car specs, application and desired idle characteristics.
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04-19-2016, 10:30 AM
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CC Member
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Join Date: Apr 2007
Cobra Make, Engine:
Posts: 1,009
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Not Ranked
This engine is a 498 CID FE and I think it has more of a small block sound. Specs are 15 to 1, cam is 287 in and 297 ex @.050 with .800" lift, Ported Blue Thunder heads, modded Victor Jr. intake, 1650 cfm Wilson throttle body (with secondaries wired shut because of wheel spin), Fast EFI, 65 lb injectors, Carrillo rods, Moldex crank, Dailey Dry sump, Shelby Aluminum Block, MSD with crank fire chipped at 8200.
[ame]https://www.youtube.com/watch?v=RL6d5KMG3zw&list=UU0CJQuj-tI4J89NccUhpJ1Q&index=4[/ame]
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