On paper it should be scary fast. On the road, not so much

[Mattax]

you could help a lot by providing more info. (To specific posts asking you for SPECIFIC info.) Also, if your automotive knowledge (or lack of it), precludes you from answering, NO PROBLEM! That's why your're on here asking for help! Just tell us!

This is such a good observation, and for everyone, not just Pedro. Many threads where it would be super helpful if a question doesn't make sense or isn't understandable, it would be great of the person asked for clarificatoin or ask how to fin d or do the thing.

 

[dr dodge]

some of these threads that die may also could be

"oh, I did something dumb, and am too embarassed to say"

me, I admit I do dumb stuff, we all do from time to time

why it's always good to have someone check your work

 

[SpeedThrills]

I notice the OP's in Sacramento too. Plenty of guys in the area willing to lend a hand, including me.

I have time. But South Jersey's juuuust a bit out of my range. Unless, of course, Pedro's willing to fly my wife and me out there, and put us up, and feed us... If he calls my bluff, I'd BETTER fix it!

 

[MiradaMegaCab]

1-8-4-3-6-5-7-2

 

[SpeedThrills]

This is such a good observation, and for everyone, not just Pedro. Many threads where it would be super helpful if a question doesn't make sense or isn't understandable, it would be great of the person asked for clarificatoin or ask how to fin d or do the thing.

Thanks. You Philly guys are alright!

-Full disclosure- I was born and raised in Philly.

 

[Mattax]

Thanks. You Philly guys are alright!

-Full disclosure- I was born and raised in Philly.

Ha! I'm actually a jersey kid - North Jersey at that. Moved to Philly in '93.

 

[mopowers]

Looks like Pedro peaced out. That's a bummer because I really wanna see what the problem was/is.

 

[junkyardhero]

Ha! I'm actually a jersey kid - North Jersey at that. Moved to Philly in '93.

go back to Ho-Ho-Kus JERZ

*throws a D cell*

 

[BrianT]

From another Jersey guy, I once had a 340 that I thought was lacking in performance. My buddy put four more degrees of timing in it, played around with the mixture and idle speed a bit, and then realized that the throttle wasn't opening all the way when the pedal was to the floor. After fifteen minutes of work, it was a new vehicle. Just goes to show, it could be something simple.

 

[RustyRatRod]

Chalk this up to another hit n run.

 

[toolmanmike]

We might eventually get to the root of the problem but all we can do is guess. Many of the issues on these forums need to go to someone's garage that knows their way around these old Mopars. It's near impossible to diagnose and fix a problem over your phone. I know, frustrating for both of us.

 

[missing linc]

From another Jersey guy, I once had a 340 that I thought was lacking in performance. My buddy put four more degrees of timing in it, played around with the mixture and idle speed a bit, and then realized that the throttle wasn't opening all the way when the pedal was to the floor. After fifteen minutes of work, it was a new vehicle. Just goes to show, it could be something simple.

The first Dart that I bought had J heads and intake, thermoquad carb on a bagged out 318/904. Had no throttle pressure linkage at all, and the throttle cable was tied around the carb stud, with no brackets. WOT was barely 25%, and it was in 3rd gear by 20 mph. Seller had done all that work but had no clue. I got all the proper linkage and brackets and suddenly it would smoke the tire!

 

[MobileCustoms]

 

[mopowers]

 

[MOPAROFFICIAL]

is it this engine?

Chrysler Small Block Compatible 408 c.i. Engine - 465 Horsepower - Deluxe Dressed - Carbureted

Overview:​

This BluePrint Engines crate engine delivers a strong 465 horsepower and 494 ft-lbs. of torque with a pump-gas-friendly 10:1 compression ratio, making it an ideal choice for classic muscle car builds and street performance applications. Built with a durable cast crankshaft, forged pistons, and a performance roller cam, it’s topped with aluminum heads for improved airflow and efficiency. A Holley 750cfm Classic Carburetor feeds the engine, supported by a complete fuel system including a fuel pump, fuel line, and spark plugs and wires for reliable ignition. Cooling is handled by a drive side inlet water pump, thermostat, and thermostat housing, while a harmonic balancer, timing cover, valve covers, distributor, oil pan, and air cleaner round out this turn-key package—perfect for dropping into your next street-ready project.

Description:​

• Horsepower & Torque: 465 Horsepower / 494 FT. LBS. Torque
• Compression Ratio: 10:1
• Aluminum Heads
• Roller Cam
• Cast Crankshaft
• Forged Pistons

Block:​

• Hand-Picked Seasoned Magnum Block
• Square and Parallel Decked
• Align Honed Main Bearing Bore
• Cylinders Honed on Computer Controlled Machine to Within .0002 Straightness and Roundness
• Cylinders are Sonic Tested for Thickness
• 2-Bolt Main
• 4.040" Bore
• 2-Piece Rear Main Seal
• Mech Fuel Pump Provision: Yes

Rotating Assembly:​

• Cast Crankshaft
• 4.000" Stroke
• Forged Magnum 6.123" Connecting Rods w/ 150,000 PSI Bolts
• Forged Pistons
• Externally Balanced Front and Rear

Cylinder Heads:​

• BluePrint Engines Assembled and Machined Edelbrock 61769 Casting
• Aluminum Magnum Pattern Cylinder Heads
• 58cc Chamber
• Full Roller Rocker Arms
• 2.02" Intake / 1.60" Exhaust Valves
• 176cc Intake / 75cc Exhaust Runners

Cam Specs:​

• Cam Type: Roller
• .544 Intake / .541 Exhaust Lift
• 236 Intake / 242 Exhaust Duration
• @.050-110 Degree Lobe Separation

Ignition Timing:​

• 34 Degrees Total at 4000 RPM

Also Includes:​

• Holley 750cfm Classic Carburetor - BPP080508S
• Thermostat and Thermostat Housing
• Passenger Side Water Pump
• Fuel Pump and Fuel Line
• Spark Plugs and Wires
• Harmonic Balancer
• Timing Cover
• Valve Covers
• Air Cleaner
• Distributor
• Oil Pan

Notes:​

• If installing with a Manual Transmission with .750" input shaft, Recommended Pilot bearing is PN FC-69907.
• Recommended Pilot OD is 1.81"

You've been blueprinted..lol

 

[Hysteric]

A year and a half ago I bought a 67 Barracuda Convert. Came with newish Blueprint crate 408 and a new 904. Blueprint says it should have around 450 hp and tq. I added a new steering box and Doug headers. The engine sounds and is strong. Just had the timing and the carb tuned. I'll add the engine stats below. With all this, I should be going through tires , but it wont do a burn out and feels like I'm dragging a cinder bock! The only thing similar I've had was a 68 Charger with a 318 almost 40 years ago. It had lots more torque...that is to say it would easily smoke the tire. Not the Barracuda. Any thoughts? I know lower gears would help (3.23 now), but shouldn't really be needed.

408 Stroker, • HP & Torque: 465 HP / 494 FT LBS • Compression Ratio: 10:1 • Aluminum Heads • Roller Cam • Cast Steel Crank • Forged Pistons BLOCK: • Hand picked seasoned Magnum block • Square and parallel decked • Align honed main bearing bore • Cylinders honed on computer controlled machine to within .0002 straightness and roundness • Cylinders are sonic tested for thickness • 2-Bolt Main • 4.000" Bored .040" over • 2-Piece Rear Main Seal • Mech fuel pump provision: Yes ROTATING ASSEMBLY: • New Steel crankshaft • 4.000" Stroke • Forged Magnum 6.123" connecting rods w/ 150,000 psi bolts • Forged pistons • Externally balanced CYLINDER HEADS: • BluePrint Engines Assembled and Machined Edelbrock 61769 Casting • Aluminum Magnum Pattern Cylinder Heads - 58cc chamber • Aluminum Roller Rockers • 2.02" intake/1.60" exhaust valves • 176cc intake/75cc exhaust runners CAM SPECS: • Cam Type: Roller

Id start with a compression check and then the ignition strength.

 

[Johnny Mac]

You've been blueprinted..lol

I don’t get it?

 

[496 polara]

You've been blueprinted..lol

xzhibit up in here....up in here.

 

[MOPAROFFICIAL]

is it this engine?

Chrysler Small Block Compatible 408 c.i. Engine - 465 Horsepower - Deluxe Dressed - Carbureted

Overview:​

This BluePrint Engines crate engine delivers a strong 465 horsepower and 494 ft-lbs. of torque with a pump-gas-friendly 10:1 compression ratio, making it an ideal choice for classic muscle car builds and street performance applications. Built with a durable cast crankshaft, forged pistons, and a performance roller cam, it’s topped with aluminum heads for improved airflow and efficiency. A Holley 750cfm Classic Carburetor feeds the engine, supported by a complete fuel system including a fuel pump, fuel line, and spark plugs and wires for reliable ignition. Cooling is handled by a drive side inlet water pump, thermostat, and thermostat housing, while a harmonic balancer, timing cover, valve covers, distributor, oil pan, and air cleaner round out this turn-key package—perfect for dropping into your next street-ready project.

Description:​

• Horsepower & Torque: 465 Horsepower / 494 FT. LBS. Torque
• Compression Ratio: 10:1
• Aluminum Heads
• Roller Cam
• Cast Crankshaft
• Forged Pistons

Block:​

• Hand-Picked Seasoned Magnum Block
• Square and Parallel Decked
• Align Honed Main Bearing Bore
• Cylinders Honed on Computer Controlled Machine to Within .0002 Straightness and Roundness
• Cylinders are Sonic Tested for Thickness
• 2-Bolt Main
• 4.040" Bore
• 2-Piece Rear Main Seal
• Mech Fuel Pump Provision: Yes

Rotating Assembly:​

• Cast Crankshaft
• 4.000" Stroke
• Forged Magnum 6.123" Connecting Rods w/ 150,000 PSI Bolts
• Forged Pistons
• Externally Balanced Front and Rear

Cylinder Heads:​

• BluePrint Engines Assembled and Machined Edelbrock 61769 Casting
• Aluminum Magnum Pattern Cylinder Heads
• 58cc Chamber
• Full Roller Rocker Arms
• 2.02" Intake / 1.60" Exhaust Valves
• 176cc Intake / 75cc Exhaust Runners

Cam Specs:​

• Cam Type: Roller
• .544 Intake / .541 Exhaust Lift
• 236 Intake / 242 Exhaust Duration
• @.050-110 Degree Lobe Separation

Ignition Timing:​

• 34 Degrees Total at 4000 RPM

Also Includes:​

• Holley 750cfm Classic Carburetor - BPP080508S
• Thermostat and Thermostat Housing
• Passenger Side Water Pump
• Fuel Pump and Fuel Line
• Spark Plugs and Wires
• Harmonic Balancer
• Timing Cover
• Valve Covers
• Air Cleaner
• Distributor
• Oil Pan

Notes:​

• If installing with a Manual Transmission with .750" input shaft, Recommended Pilot bearing is PN FC-69907.
• Recommended Pilot OD is 1.81"

If it has a shitty converter, or there's something wrong with it, that could cause the whole issue. But that's why he needs to get the engine in good tune first. I'd hate to see him spend 600 bucks on a converter and it not solve it. But then, as I said earlier, that whole transmission would get **** canned if it was mine.

And if he can't tune it, thats a real mess and disappointment. 3.23 is weak for gears, 3.73/3.91 would be ideal for a real driver/stoplight racer.

 

[MOPAROFFICIAL]

I don’t get it?

It's a spin on the idea of what a blueprint engine actually is, in that his car/drive train prolly isn't set up for this motor.
Convertor/gears..

That aside he probably isn't Savvy with tuning either

 

[RustyRatRod]

And if he can't tune it, thats a real mess and disappointment. 3.23 is weak for gears, 3.73/3.91 would be ideal for a real driver/stoplight racer.

I've always considered 3.23s as "big block" or really stout small block gears. Even still, the correct converter will still make a night and day difference, IF that turns out to be the issue. Hopefully this doesn't turn into yet another hit n run. Those are gettin old.

 

[abodyjoe]

3.23 is weak for gears, 3.73/3.91 would be ideal for a real driver/stoplight racer.

weak or not a stock 360 should boil the tires with a 3.23. a 408 with all that tq should really boil them.

 

[Ricks70Duster340]

weak or not a stock 360 should boil the tires with a 3.23. a 408 with all that tq should really boil them.

I can tell you this: I've had two 70 Dusters now with the BP 408 engine, 727, and 3.55 gears. Traction *IS* a problem. Those engines put out in the neighborhood of 500 torque.

 

[MOPAROFFICIAL]

weak or not a stock 360 should boil the tires with a 3.23. a 408 with all that tq should really boil them.

You would think so. ..but initial timing 5 before tdc and carb not dialed.. who knows..

 

[RustyRatRod]

weak or not a stock 360 should boil the tires with a 3.23. a 408 with all that tq should really boil them.

I had an 8.5:1 360 I built years ago that was VERY mild that would fry the tires on command with 3.23s. All it had for mods was the crane magic cam, headers, the MP electronic ignition stock 71 TQ intake and a Moroso carburetor pan sealed to the hood scoop. It ran 13.70s as it sat and with the 4.10s swapped in with slicks it ran 13 teens. I wanted 12s but sold the car before I got there. It was in a 71 Dart.