Post 11 second small block combos
- Thread starter joes68340s
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PB?
mderoy340
Well-Known Member
personal best
skips dart 2
Member
Cast iron 340 R3 4 bolt main block @ 4.070
Diamond forged street strip dished pistons #51409
Scat forged rods, mopar forged crank 4" arm
Comp solid tappet 247/254 at .050 107.0 LS
Lift 550/532 with 1.6 PRW rockers and shafts
IMM prepped Mopar LA alumn heads 2.05/1.60
Comp Bhive springs and retainers
IMM prepped mopar alumn. 6 Pack intake
Holley 6 pack set up c/w Promax metering and jet plates
also modified the kill bleed circuits to accept interchangeable
bleed inserts for front and rear carb opening control.
3/8' phenolic carb to intake spacers
Custom machined billet velocity air intake
Sealed to hemi hood as good as possible
SMR built manual 727 --9" converter
Denny's driveshaft, 8 3/4 rear 489 case Trutrac 3.91 gears
Moser Axles
MSD box,coil and distributor.
T T I step headers 3'' exhaust
MT Street radials 255 60R 15"
Made 525 hp at flywheel at 5800 RPM
Tried AED 850 HO and airgap intake for a bit, lost a tenth
Little much maybe--- so back to 6 pack which I enjoy.
Very nice car! Love the green!!! At 525 hp, keep chipping away... there’s a 10.90 in there somewhere.
Any more pics, by chance??
skips dart 2
Member
Thanks for that Doug, haven't been chasing that 10, already in roll bar territory and been told a few times its time.
Definitely pushing my luck without one just cant bring myself to install one in this car, besides up here in the north tough to get classic car insurance
when they see a roll bar installed.
Couple more pics, thanks for the interest.
Gary
To bad you can’t bolt it in and in bolt it out.
skips dart 2
Member
Good thought on the bar rumblefish, food for some thinking.
I don’t know if that would be a “legal option” to perform.
RBConvert
Well-Known Member
Beautiful ride. What did you do to lighten the car? Looks like a full interior; fiberglass hood? Is the batt in the trunk?
skips dart 2
Member
Hey RB, thanks, really have made no effort to lighten car other than the fiberglass hood. Has a totally restored full interior ,battery still up front, was an exceptional 1 family owned original steel real F6 green dart 340 swinger that I won off Ebay a few years back. Basically did a repaint,restored interior, removed original numbers 340 drivetrain which I have sitting and replaced with existing power, has SS springs and Caltracs which work not to bad.
RBConvert
Well-Known Member
Sharp interior. Even has the roller radio - don't see too many of them anymore.
Cope
Fusing with fire
Bolt in is ok. Must be 4, 5/8 bolts with 6x6 plates on both sides.
I guess I can join the club now.
And with a DA of 4500ft. First run, new combo, rolling into throttle off idle.
408 magnum block 11.6:1
Speed master LA cnc heads w/ external oiling mods
Super Vic intake port matched
Howard's solid roller 257/267 .640/.645 108/104
Dynamic converter 4500ish
904 mv
4.30 gears
255/60/15 Mt et street r
Cal Trac mono leaf and bars
And with a DA of 4500ft. First run, new combo, rolling into throttle off idle.
408 magnum block 11.6:1
Speed master LA cnc heads w/ external oiling mods
Super Vic intake port matched
Howard's solid roller 257/267 .640/.645 108/104
Dynamic converter 4500ish
904 mv
4.30 gears
255/60/15 Mt et street r
Cal Trac mono leaf and bars
Last edited:
Oh yeah, with a little more tuning this thing is gonna be a monsyer. Built the engine with nitrous in mind as well. Can't wait for the fun.
furrystump
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- Joined
- Nov 13, 2004
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I think mine is a 78 360 block bored to .040. With Icon forged flat top pistons .010 in the hole. Scat h beam rods and Scat 4” cast crank. The heads are x heads ported by Dwayne Porter of Porter Racing Heads. Flow about 280 cfm intake. The cam is an Engle flat tappet intake .557 lift 245 degs at .050 lift. Exh is .551 lift with 261 degs at .050 lift. 112 degs lobe seperation. Intake is stock 68-69 340 manifold with the divider cut down and smoothed out a bit. Stock hipo 340 exh manifolds. Eddy 800 cfm AVS thunder series. Two fuel pumps. A big Carter mechanical and a Holley red pump back at the tank with Holley hydra mat inside. Mallory billet distributor and MSD 6al. Cope Racing trans 727 auto shift with a PTC 9.5 “ converter. 4:10 rear gear in an 8 3/4”. TTI 2.5” exhaust. Original 340 front torsion bars with QA1 R’s on the front and 1” over arched leafs on the rear with lame KYB shocks. Car is original 68 Barracuda 340-s Fastback, weighs 3445 lbs with me in it. Tires are f70-14 polyglas redlines. Best run is 1.71 60’ 11.83 at 116. Shifting at 6300 rpm.
1986 b250 block w/scat408 11:1cr kit, Muscle Motors prepped and ported Eddy top end, comp custom grind .571"/.571 248/254 duration @.050" 112deg separation installed at 108 deg. Hughes roller rockers and lifters with B3 geometry kit and FAST XFI sportsman efi with MSD on aforementioned ported super victor intake, TTI 1-7/8",Hughes 3500 converter,FB built 727 rmvb and 2.94 low set,2" narrowed(each side) 8-3/4 3:91's,front halfed HDK nose ,control freak 4 bar rear,viking coil overs,custom cell,scaled with full tank (16 gallons) at 2960#,185/75x15 frt,325/50x15 rear.Full interior. running 100 unleaded. first run when built at the last mopars at Englishtown was 11.43,last runs at Mopars at the valley 11.1's. Street driven anywhere
Coffee&Cars
Well-Known Member
My first Duster
Holly DP 750
1 Inch butterfly phenol spacer
M-1 intake, Pleninuim and runners deburred, port matched to heads
587 J's, home ported,243 cfm intake, 2.05 nail head intake valve, head was cut .015
Felpro head gasket, .039 thick
1970 340 block
Stock crank
Stock rods, fitted for floating pins
TRW forged +.030
Double roller timing chain
Mopar purple shaft, solid lifter, 292 duration,.528 lift,
Crane iron adjustable rockers
Melling high volum oil pump, ported and worked on, 90 psi at idle
Lifter valley cross over tube set up
oversized oil pickup
Moroso 7 qt pan
727
3,000 stall
8 3/4
strange axels
4:56 gears on a spool
Cal tracks on super stock springs
C-Body rear drums
Factory discs on the front
28x10.5 M/T
11.6 @ 116mph
Holly DP 750
1 Inch butterfly phenol spacer
M-1 intake, Pleninuim and runners deburred, port matched to heads
587 J's, home ported,243 cfm intake, 2.05 nail head intake valve, head was cut .015
Felpro head gasket, .039 thick
1970 340 block
Stock crank
Stock rods, fitted for floating pins
TRW forged +.030
Double roller timing chain
Mopar purple shaft, solid lifter, 292 duration,.528 lift,
Crane iron adjustable rockers
Melling high volum oil pump, ported and worked on, 90 psi at idle
Lifter valley cross over tube set up
oversized oil pickup
Moroso 7 qt pan
727
3,000 stall
8 3/4
strange axels
4:56 gears on a spool
Cal tracks on super stock springs
C-Body rear drums
Factory discs on the front
28x10.5 M/T
11.6 @ 116mph
Updated time - 11.77@114 @ 5900ft da (Sea level is gonna be a blast)
I broke some top end stuff, so ended up buying new trickflows and getting it all sorted. This was the shake down run 32* total timing and baby soft launch, 1st and 2nd gear were shifted at 5500rpm and it sounded and felt good so I let it ride out 3rd, now through the traps at almost 7000rpm (6400-6500 with the other heads).
2nd run, Shift light set at 6500, footbrake to 2500, timing at 34*. Launched so hard it threw me back in the seat and pulled my seat mount through the floor which caused me to shift into 2nd about the 60ft mark. Still ran 11.83. I guess i'm gonna need to strengthen some stuff.
I broke some top end stuff, so ended up buying new trickflows and getting it all sorted. This was the shake down run 32* total timing and baby soft launch, 1st and 2nd gear were shifted at 5500rpm and it sounded and felt good so I let it ride out 3rd, now through the traps at almost 7000rpm (6400-6500 with the other heads).
2nd run, Shift light set at 6500, footbrake to 2500, timing at 34*. Launched so hard it threw me back in the seat and pulled my seat mount through the floor which caused me to shift into 2nd about the 60ft mark. Still ran 11.83. I guess i'm gonna need to strengthen some stuff.
dugascarman
Member
That's pretty impressive! I'm building a '72 Scamp for the street and strip and think this would be a decent combo. Was it the KB107 Pistons you used? And did you have the heads ported? Would like to know more if possible. Thanks!
Coffee&Cars
Well-Known Member
Coffee&Cars
Well-Known Member
Later on this engine was rebuilt after 6 seasons of racing. The engine was perfic. The valve springs were tired and needed replacing. He added a little more port work and we added the 320 degree-.620 lift soild lifter Purple shaft cam. It went 11.30 @119mph. All day long..............
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