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Re: Opinions on building a 12 sec daily driver cuda
[Re: kenworth_goose]
#716541
06/07/10 08:23 PM
06/07/10 08:23 PM
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Joined: Mar 2005
Posts: 3,445
N.Wilkesboro,NC
DusterKrazy
master
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master
Joined: Mar 2005
Posts: 3,445
N.Wilkesboro,NC
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Quote:
how about a 360, use 273 rods, kb 10 to 1's, 508 hydraulic cam, adjustable rockers, windage tray, single plane intake, holley 750 with bigger jets and squirters. I had this in my 68 dart GTS with a 904, shiftkit, stock convertor, 3.91's. It would run 12.40's all day in 90+ degree heat. 32 degrees total timing. I had a full bodied car with full exhaust and street tires. Very simple to build, cost less than 2k in parts, and never lost 1 lb of oil pressure and I rode it very hard. It seen many 7k plus revs. Keep it simple and it will scream. Those stroker 408's are over rated and cost way to much for the power they make. Mine was well over 435 hp. Do the math. The best was 12.40 at 112mph. with zero traction and a 1.95 60 ft. time. With a stall and 4.30's and a small set of slicks it would have gone 11's all day.
What heads on that combo??
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Re: Opinions on building a 12 sec daily driver cuda
[Re: DusterKrazy]
#716544
06/07/10 10:12 PM
06/07/10 10:12 PM
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Joined: May 2006
Posts: 2,046
ky.
kenworth_goose
top fuel
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top fuel
Joined: May 2006
Posts: 2,046
ky.
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Quote:
Quote:
how about a 360, use 273 rods, kb 10 to 1's, 508 hydraulic cam, adjustable rockers, windage tray, single plane intake, holley 750 with bigger jets and squirters. I had this in my 68 dart GTS with a 904, shiftkit, stock convertor, 3.91's. It would run 12.40's all day in 90+ degree heat. 32 degrees total timing. I had a full bodied car with full exhaust and street tires. Very simple to build, cost less than 2k in parts, and never lost 1 lb of oil pressure and I rode it very hard. It seen many 7k plus revs. Keep it simple and it will scream. Those stroker 408's are over rated and cost way to much for the power they make. Mine was well over 435 hp. Do the math. The best was 12.40 at 112mph. with zero traction and a 1.95 60 ft. time. With a stall and 4.30's and a small set of slicks it would have gone 11's all day.
What heads on that combo??
Stock 75 360 heads.
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Re: Opinions on building a 12 sec daily driver cuda
[Re: kenworth_goose]
#716545
06/07/10 10:24 PM
06/07/10 10:24 PM
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Joined: Mar 2005
Posts: 3,445
N.Wilkesboro,NC
DusterKrazy
master
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master
Joined: Mar 2005
Posts: 3,445
N.Wilkesboro,NC
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Quote:
Quote:
Quote:
how about a 360, use 273 rods, kb 10 to 1's, 508 hydraulic cam, adjustable rockers, windage tray, single plane intake, holley 750 with bigger jets and squirters. I had this in my 68 dart GTS with a 904, shiftkit, stock convertor, 3.91's. It would run 12.40's all day in 90+ degree heat. 32 degrees total timing. I had a full bodied car with full exhaust and street tires. Very simple to build, cost less than 2k in parts, and never lost 1 lb of oil pressure and I rode it very hard. It seen many 7k plus revs. Keep it simple and it will scream. Those stroker 408's are over rated and cost way to much for the power they make. Mine was well over 435 hp. Do the math. The best was 12.40 at 112mph. with zero traction and a 1.95 60 ft. time. With a stall and 4.30's and a small set of slicks it would have gone 11's all day.
What heads on that combo??
Stock 75 360 heads.
Mopar 508 cam with stock converter??
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Re: Opinions on building a 12 sec daily driver cuda
[Re: dustergirl340]
#716548
06/08/10 08:48 AM
06/08/10 08:48 AM
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Joined: May 2003
Posts: 6,566
Downtown Roebuck Ont
Twostick
Still wishing...
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Still wishing...
Joined: May 2003
Posts: 6,566
Downtown Roebuck Ont
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Then it wouldn't really be a daily driver would it?  It's not that any of the suggested combos can't run the #, you could build a 273 that would run the #. You just wouldn't want to drive it every day if ever and cruising on the freeway at 5500 rpm would get old pretty fast. For what he is looking for you want big cubes low CR and a small cam. He posted that he would like to keep it 360 so I would suggest a turbo could be in his future. Kevin
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Re: Opinions on building a 12 sec daily driver cuda
[Re: DaytonaTurbo]
#716550
06/08/10 03:27 PM
06/08/10 03:27 PM
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Joined: Jan 2003
Posts: 16,123
Grand Haven, MI
patrick
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 16,123
Grand Haven, MI
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I'd do an RHS headed 408 small block, brian at IMM has a package he built up in the race section that was pretty tame and budget friendly (~$5k complete), but made enough horse to push his duster into the 10's. maybe cam it down a bit (had a comp XE295HL, IIRC, maybe drop to a 285 or 275HL) so you don't have part throttle surge at cruise), and run 3.55's with the OD, or 2.94's with a low gear 904 and 12's shouldn't be a problem. or start with a magnum block and stroke to 408, and run a roller cam https://board.moparts.org/ubbthreads/show...rue#Post5071764520HP with a pretty mild hydraulic roller and the old RHS heads, using stock magnum roller lifters....
1976 Spinnaker White Plymouth Duster, /6 A833OD
1986 Silver/Twilight Blue Chrysler 5th Ave HotRod **SOLD!***
2011 Toxic Orange Dodge Charger R/T
2017 Grand Cherokee Overland
2014 Jeep Cherokee Latitude (holy crap, my daughter is driving)
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Re: Opinions on building a 12 sec daily driver cuda
[Re: DJVCuda]
#716551
06/08/10 03:49 PM
06/08/10 03:49 PM
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Joined: Apr 2007
Posts: 4,233
petaluma,ca. u.s.a.
west
master
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master
Joined: Apr 2007
Posts: 4,233
petaluma,ca. u.s.a.
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Quote:
stock 360 - small valves and an eddy tunnel ram
3.23 gears and a 904 with low gearset
16 mpg on the highway
12.56 best et
108 best mph
i think alot of recipes listed better be in the 11's or somethings wrong with the build!
I agree,my mostly stock 360(except for cam and heads) runs mid to low 12's easy.
gears and vehicle weight have a lot to do with it.
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Re: Opinions on building a 12 sec daily driver cuda
[Re: west]
#716552
06/08/10 04:46 PM
06/08/10 04:46 PM
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Joined: Jan 2003
Posts: 16,123
Grand Haven, MI
patrick
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 16,123
Grand Haven, MI
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Quote:
Quote:
stock 360 - small valves and an eddy tunnel ram
3.23 gears and a 904 with low gearset
16 mpg on the highway
12.56 best et
108 best mph
i think alot of recipes listed better be in the 11's or somethings wrong with the build!
I agree,my mostly stock 360(except for cam and heads) runs mid to low 12's easy.
gears and vehicle weight have a lot to do with it.
true, but 4.30's, 3500 RPM converters, 240-250@.050 cams aren't exactly street friendly....
another option if you want a daily driver that runs in the 12's? get a 300 SRT8 (:
the iron case A833OD should live if you don't hook hard...
1976 Spinnaker White Plymouth Duster, /6 A833OD
1986 Silver/Twilight Blue Chrysler 5th Ave HotRod **SOLD!***
2011 Toxic Orange Dodge Charger R/T
2017 Grand Cherokee Overland
2014 Jeep Cherokee Latitude (holy crap, my daughter is driving)
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Re: Opinions on building a 12 sec daily driver cuda
[Re: DusterKrazy]
#716554
06/08/10 07:18 PM
06/08/10 07:18 PM
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Joined: May 2006
Posts: 2,046
ky.
kenworth_goose
top fuel
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top fuel
Joined: May 2006
Posts: 2,046
ky.
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Quote:
Quote:
Quote:
Quote:
how about a 360, use 273 rods, kb 10 to 1's, 508 hydraulic cam, adjustable rockers, windage tray, single plane intake, holley 750 with bigger jets and squirters. I had this in my 68 dart GTS with a 904, shiftkit, stock convertor, 3.91's. It would run 12.40's all day in 90+ degree heat. 32 degrees total timing. I had a full bodied car with full exhaust and street tires. Very simple to build, cost less than 2k in parts, and never lost 1 lb of oil pressure and I rode it very hard. It seen many 7k plus revs. Keep it simple and it will scream. Those stroker 408's are over rated and cost way to much for the power they make. Mine was well over 435 hp. Do the math. The best was 12.40 at 112mph. with zero traction and a 1.95 60 ft. time. With a stall and 4.30's and a small set of slicks it would have gone 11's all day.
What heads on that combo??
Stock 75 360 heads.
Mopar 508 cam with stock converter?? [/quot
Yes a factory high stall convertor. Was someday going to switch to a 3400 but sold the car before. The car is on utube doing a big burnout in Heath during the nats a few years ago. Do a search with kenworthgoose and you'll see it.
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Re: Opinions on building a 12 sec daily driver cuda
[Re: derekeh]
#716556
06/08/10 09:59 PM
06/08/10 09:59 PM
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Joined: Feb 2003
Posts: 18,582
Rust Belt, SW PA
Silver70
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I Live Here
Joined: Feb 2003
Posts: 18,582
Rust Belt, SW PA
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Quote:
I didn't know it would take so many cubes to make a mild 12 second cuda. How difficult is it to swap a 302 or 350 in? I know some cars running those engines that are well into the 12s and are mild enough to be driven daily.
A ford or gm motor  I hope your joking! All you need is a mild 440... there people that have take later 70s one, add steel shim headgaskets, good cam, converter, and some gears and run 12s. They are low compression and you could run 87 octane for street use. You don't need a stroker to run 12s, it may make it easier, less gear and converter, but I cann't see spending the extra money. Some of the combos here better run deep into the 11s or 10s for me to even consider spending the coin to build them!
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Re: Opinions on building a 12 sec daily driver cuda
[Re: derekeh]
#716557
06/09/10 08:02 AM
06/09/10 08:02 AM
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Joined: Jan 2003
Posts: 16,123
Grand Haven, MI
patrick
I Live Here
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I Live Here
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Grand Haven, MI
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Quote:
I didn't know it would take so many cubes to make a mild 12 second cuda. How difficult is it to swap a 302 or 350 in? I know some cars running those engines that are well into the 12s and are mild enough to be driven daily.
well, a street driven cuda with all the comforts, etc, will probably be in the 3400-3600 lb range, which takes some power.
it's easy to do with a simple stock displacement motor, if you're willing to take some compromises in gearing, drivability, and fuel economy. the 302/350 cars you mention probably have the same compromises. the OD tranny's gearing is kind of wide, so you need to take that into account when designing your motor. you need to make the torque curve flaaaat and wiiide. smaller displacement motors to make the power tend to be peaky. Ad in a high stall lockup torque converter, and you can get around the peaky torque curve.
IMHO, the key to making the power is good heads. the better they flow, the less duration you need in the cam. less duration makes the motor milder, helping with drivabulity and part throttle economy. wider LSA's also do that. if you build a 360 and a 408 identical (same cam, heads, intake, compression, etc), they will make the same horse power, but the 408 will do it at a lower RPM, and also make ~12% more torque, and have a more tame idle.
for me, If you wanted to start with a stock stroke 360, I'd start with a 360 magnum. Then I'd add some edelbrock or RHS heads, slightly massaged, and KB107 pistons. I'd then run as agressive of a hydraulic roller cam as I could, to maximize .050 and .2" duration while minimizing seat duration and overlap. I'd also run a modded edelbrock LD340, and run a demonsizzler prepped big block thermoquad.
1976 Spinnaker White Plymouth Duster, /6 A833OD
1986 Silver/Twilight Blue Chrysler 5th Ave HotRod **SOLD!***
2011 Toxic Orange Dodge Charger R/T
2017 Grand Cherokee Overland
2014 Jeep Cherokee Latitude (holy crap, my daughter is driving)
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Re: Opinions on building a 12 sec daily driver cuda
[Re: Purpleracer]
#716559
06/09/10 03:19 PM
06/09/10 03:19 PM
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Joined: Jan 2003
Posts: 13,374
Marion, South Carolina [><]
an8sec70cuda
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I Live Here
Joined: Jan 2003
Posts: 13,374
Marion, South Carolina [><]
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A VERY mild 440 will run 12s on pump gas and be extremely reliable.
Here's a mild combo that I drove 3 hours one way on the interstate to college, yet ran 11.80s at the track.
440 w/ Ross flattops, stock bottom end other than the pistons.
906 heads w/ a 3 angle valve job, that's it.
9.8:1 compression, 93 pump gas.
509/292 purpleshaft hyd. cam, stock rockers and pushrods, 0933 hemi springs
Edelbrock Performer RPM intake, 830 holley DP
1 7/8" headers, 3" exhaust to the factory tips w/ flowmasters
727, 10" 3500 stall, 3.91 gears
Car weighed 3700# w/ me in it.
ran 11.80s at 112 mph. 7.50s in the 1/8.
CHIP
'70 hemicuda, 575" Hemi, 727, Dana 60
'69 road runner, 440-6, 18 spline 4 speed, Dana 60
'71 Demon, 340, low gear 904, 8.75
'73 Chrysler New Yorker, 440, 727, 8.75
'90 Chevy 454SS Silverado, 476" BBC, TH400, 14 bolt
'06 GMC 2500HD LBZ Duramax
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Re: Opinions on building a 12 sec daily driver cuda
[Re: an8sec70cuda]
#716560
06/09/10 03:51 PM
06/09/10 03:51 PM
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Joined: Jan 2003
Posts: 16,123
Grand Haven, MI
patrick
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 16,123
Grand Haven, MI
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without an overdrive, anything lower than a 2.94 for the rear isn't daily driver friendly, especially if you go on the interstate at all..... with an overdrive and 26-28" tires, a 3.55-3.91 is about the max.... and a MP 509 doesn't sound very DD friendly either.. 224-230@.050 is about the max I'd consider for daily driver cam duration for a motor in the 340-440 cid range...
1976 Spinnaker White Plymouth Duster, /6 A833OD
1986 Silver/Twilight Blue Chrysler 5th Ave HotRod **SOLD!***
2011 Toxic Orange Dodge Charger R/T
2017 Grand Cherokee Overland
2014 Jeep Cherokee Latitude (holy crap, my daughter is driving)
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Big cubes, mild CR and mild cam. A stock stroke 440 will give you great street manners while putting you well into the 12's. If you did something like a 10:1 440 with edelbrock rpm/440source heads, edelbrock rpm or holley street dominator intake, headers, 800-850cfm carb and a mild hydraulic cam like a lunati voodoo 60303 you will be deep into the 12's and can run 11's if you ever change it up to a more aggressive cam.
