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Molnar Technologies

Crankshafts and Connecting Rods for High Performance and Racing Engines

molnar technologies rods and crankshafts logo

Tom Molnar has been involved with the design and manufacture of high performance and racing engine connecting rods and crankshafts for over 30 years. He is well respected in the performance and racing parts industry. Adept and using the latest technologies Molnar continues to advance the state of the art in high performance and racing engine parts.

Molnar applies current cutting edge technologies to design superior performing parts at affordable prices. The technologies Molnar have used are familiar to many of the top engine builders in the high performance and racing engine parts aftermarket. Many of you will recognize Tom as being a large part of the success as General Manager of one of the largest connecting rod and crankshaft manufacturing companies in the USA.

Molnar Technologies Connecting Rods

We have the full range of Molnar rods which are available to cover a large range of engine types. To view all of the available rods please click > Molnar Technologies Connecting Rods

molnar technologies connecting rod side view

 

Want to know about racing engine technologies? Molnar is the guru!

Molnar is putting his wealth of knowledge, real world experience, and entrepreneurial spirit to work to constantly bring improved and more refined products to market. He has spent many years refining the design of crankshafts and connecting rods for use in high performance and racing engines. His products have been made to fit a wide range of engines, from small cubic inch 4 cylinder turbo engines, 6 cylinders, to huge V8 stroker engines and even the Dodge V10 Viper engine.

Molnar Crankshafts

Molnar Crankshafts

Molnar Technologies crankshaft models are available for many engines, in both stock stroke and stroker versions. The majority Molnar cranks are premium forged crankshafts made from 4340 grade steel and precision machined to exacting tolerances. Also available for certain extreme applications a4340 e billet steel cranks.

Molnar Technologies Crankshaft Catalog Quick Jump Links

Domestic V8 Crankshafts

Sport Compact Import Engine Crankshafts

 

American V8 Engine 4340 Forged Steel Crankshaft Specs (Billet cranks are noted as such in the Description and Notes)

Buick 455 Billet Crank

Stroke Description and Notes Rod Pin Dia. Main Journal Size Min
Rod
Length
Bob
Weight
Part # and Price
4.400

Buick Billet Crankshaft

455 Buick with 2.200" diameter rod pins - Uses .925 Wide Buick Rods

2.200 Buick 455 6.600 2200 455-4400UC8B

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SBC CHEVY

All small block Chevy cranks listed here are 2 piece rear seal type unless noted as being for a one piece seal in the description column. One piece rear seal cranks will also have OPS included in the part number.

3.480

3.480 Stroke 50 pound Legal with rounded leading and trailing counterweight edges 50 pound Late Model Stock Legal

2.100 350 5.700 1500 350-3480BB6F-RN

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3.480 3.480 Stroke 2.100 350 5.700 1875 350-3480BB6F-57

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3.500 3.500 Stroke with big block snout and Honda journal 1.888 (Honda journal) 283 / 327 6.000 1675

283-3500AD6F-60

Discontinued, no longer available

3.500 3.500 Stroke 2.100 350 6.000 1825 350-3500BB6F-60

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3.562 3.562 stroke with Honda journal 1.888 (Honda journal) 350 6.000 1800

350-3562BD6F-60

Out of stock, Discontinued by Manufacturer

3.625 3.625 Stroke 2.100 350 5.700 1800 350-3625BB6F-57

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3.750 3.750 Stroke 2.100 350 5.700 1800 350-3750BB6F-57

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3.750 3.750 Stroke 2.100 350 6.000 1800 350-3750BB6F-60

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3.750 One piece rear main seal 2.100 350 5.700 1800 350-3750BB6F-OPS-57

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3.800   2.100 350 5.700 1800 350-3800BB6F-57

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3.875   2.100 350 5.700 1800 350-3875BB6F-57

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3.875 3.875 stroke with 400 main journals 2.100 400 5.850 1850 400-3875CB6F-585

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4.000   2.100 350 5.850 1850 350-4000BB6F-585

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4.000   2.100 350 6.000 1850 350-4000BB6F-60

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4.000 4.000 stroke with 400 main journals 2.100 400 5.850 1850 400-4000CB6F-585

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4.125 4.125 stroke with 400 main journals 2.100 400 5.850 1850 400-4125CB6F-585

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SBC CHEVY LIGHTWEIGHT CRANKS

Stroke Description and Notes Rod Pin Dia. Main Journal Size Min
Rod
Length
Bob
Weight
Part # and Price
3.350 3.350 Lightweight, Honda journal 1.888 (Honda journal) 283 6.000 1750 283-3350AD6L-60

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3.500 3.500 Lightweight, 2.000 small journal 2.000 350 6.000 1750 350-3500BA6L-60

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3.500 3.500 Lightweight 2.100 350 5.700 1750 350-3500BB6L-57

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3.500 3.500 Lightweight 2.100 350 6.000 1750 350-3500BB6L-60

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3.750 3.750 Lightweight 2.100 350 5.700 1750 350-3750BB6L-57

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3.750 3.750 Lightweight 2.100 350 6.000 1750 350-3750BB6L-60

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3.875 3.875 Lightweight 2.100 350 6.000 1750 350-3875BB6L-60

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CHEVY LS Cranks

Stroke Description and Notes Rod Pin Dia. Main Journal Size Min
Rod
Length
Bob
Weight
Part # and Price
3.622 3.622 stock stroke LS Crank with 24 tooth ring 2.100 LS 6.125 1800 346-3622LB6F-610-24

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3.622 3.622 stock stroke LS Crank with 58 tooth ring 2.100 LS 6.125 1800 346-3622LB6F-610-58

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3.750 3.750 LS stroker crank with 24 tooth ring 2.100 LS 6.125 1800 346-3750LB6F-610-24

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3.750 3.750 LS stroker crank with 58 tooth ring 2.100 LS 6.125 1800 346-3750LB6F-610-58

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3.900 3.900 LS stroker crank with 24 tooth ring 2.100 LS 6.125 1800 346-3900LB6F-610-24

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3.900 3.900 LS stroker crank with 58 tooth ring 2.100 LS 6.125 1800 346-3900LB6F-610-58

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4.000 4.000 LS stroker crank with 24 tooth ring 2.100 LS 6.125 1800 346-4000LB6F-610-24

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4.000 4.000 LS stroker crank with 58 tooth ring 2.100 LS 6.125 1800 346-4000LB6F-610 58

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4.125 4.125 LS stroker crank with 24 tooth ring 2.100 LS 6.125 1800 346-4125LB6F-610 24

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4.125 4.125 LS stroker crank with 58 tooth ring 2.100 LS 6.125 1800 346-4125LB6F-610 58

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4.250 4.250 LS stroker crank with 24 tooth ring 2.100 LS 6.125 1800 346-4250LB6F-610 24

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4.250 4.250 LS stroker crank with 58 tooth ring 2.100 LS 6.125 1800 346-4250LB6F-610 58

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Chevrolet LS7 Long Snout

4.000 4.000 Stroke LS7 long snout crank with 58 tooth ring 2.100 LS 6.100 1800 346-4000LB6F-LS7 58

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4.100 4.100 Stroke LS7 long snout crank with 58 tooth ring 2.100 LS 6.100 1800 346-4100LB6F-LS7 58

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Big Block Chevy Cranks BBC

Stroke Description and Notes Rod Pin Dia. Main Journal Size Min
Rod
Length
Bob
Weight
Part # and Price
4.000 4.000 Stroke 6 counterweight 2.200 454 6.135 2200 454-4000DC6F-6135

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4.000 4.000 Stroke 6 counterweight, One piece rear seal 2.200 454 6.135 2200 454-4000DC6F-OPS-6135

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4.250 4.250 Stroke 6 counterweight 2.200 454 6.135 2200 454-4250DC6F-6135

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4.250 4.250 Stroke 6 counterweight 2.200 454 6.385 2200 454-4250DC6F-6385

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4.250 4.250 Stroke 6 counterweight, One piece rear seal 2.200 454 6.385 2300 454-4250DC6F-OPS-6385

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4.250 4.250 Stroke 8 counterweight 2.200 454 6.385 2300 454-4250DC8F-6385

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4.375 4.375 Stroke 8 counterweight 2.200 454 6.385 2300 454-4375DC8F-6385

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4.375 4.375 Stroke 8 counterweight, One piece rear seal 2.200 454 6.385 2150 454-4375DC8F-OPS-6385

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4.500 4.500 Stroke 6 counterweight 2.200 454 6.535 2300

454-4500DC6F-6535

Discontinued

4.500 4.500 Stroke 8 counterweight 2.200 454 6.535 2300 454-4500DC8F-6535

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4.750 4.750 Stroke 8 counterweight 2.200 454 6.700 2300 454-4750DC8F

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SBM 318 340 Mopar Chrysler Dodge Plymouth

Stroke Description and Notes Rod Pin Dia. Main Journal Size Min
Rod
Length
Bob
Weight
Part # and Price
3.580 3.580 Stroke with Chevy 2.100 Rod Pins 2.100 318 340 6.123 1850 340-3580EB6F

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3.580 3.580 Stroke with stock Mopar Rod Pins 2.125 318 340 6.123 1850 340-3580EF6F

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3.790 3.790 Stroke with Chevy 2.100 Rod Pins 2.100 318 340 6.123 1850 340-3790EB6F

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4.000 4.000 Stroke with Chevy 2.100 Rod Pins 2.100 318 340 6.123 1850 340-4000EB6F

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4.000 4.000 Stroke with standard small block Mopar rod pins 2.125 318 340 6.123 1850 340-4000EF6F

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4.125 4.125 Stroke with 2.000 small block chevy, small journal rod pins 2.000 318 340 6.123 1850 340-4125EA6F

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SBM 360 Mopar Chrysler Dodge Plymouth

3.790 3.790 Stroke with Chevy 2.100 Rod Pins 2.100 360 6.123 1850 360-3790FB6F

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4.000 360 Chrysler main journals and 4.000 Stroke with standard small block Mopar rod pins 2.125 360 6.123 1850 360-4000FF6F

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Chrysler Dodge EFI Gen3 HEMI Cranks

Stroke Description and Notes Rod Pin Dia. Main Journal Size Min
Rod
Length
Bob
Weight
Part # and Price
3.593 Chrysler Drag Pack Hemi Crank with 2.100 rod pins (**NHRA Approved**) 2.100 Stock 2.559 6.000 1700 345-3593JB6F

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3.795 3.795 stroke with 2.100 Rod Pins (**NHRA Approved**) 2.100 Stock 2.559 6.000 1700 345-3795JB6F

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3.893 3.893 inch stroke with 2.100 inch diameter rod pins 2.100 Stock 2.559 6.000 1700

345-3893JB6F
Sold out, Discontinued

3.900 3.900 stroke with 2.000 rod pins 2.000 Stock 2.559 6.125 1700 345-3900JA6F

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3.900 3.900 stroke with 2.100 rod pins 2.100 Stock 2.559 6.125 1700 345-3900JB6F

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4.000 4.000 stroke with 2.100 rod pins 2.100 Stock 2.559 6.125 1700 345-4000JB6F

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4.050 4.050 stroke with 2.000 rod pins 2.000 Stock 2.559 6.125 1700 345-4050JA6F

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4.050

Extra Heavy Duty billet steel crank with 8 counterweights.

2.100 rod pins for use in brutal high output applications.

2.100 Stock 2.559 6.125 1700 345-4050JB8B

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4.080 4.080 stroke with 2.000 rod pins 2.000 Stock 2.559 6.125 1700 345-4080JA6F

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4.250

4.250 stroke with 2.000 rod pins

NOTE: This 4.250 stroke crank is NOT recommended for use with boost or nitrous.

2.000 Stock 2.559 6.125 1700 345-4250JA6F

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361 383 400 Mopar B Engine Stroker Cranks

3.910 3.910 stroke 6 Bolt Flange 2.200 361 383 400 6.450 2300 383-3910NC6F

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4.150 4.150 stroke 6 Bolt Flange 2.200 361 383 400 6.450 2300 383-4150NC6F

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4.250

4.250 stroker 6 Bolt Flange

2.200 361 383 400 6.500 2300 383-4250NC6F

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BIG BLOCK MOPAR 413 426 Wedge 426 Hemi 440 RB Engine Crankshafts

Stroke Description and Notes Rod Pin Dia. Main Journal Size Min
Rod
Length
Bob
Weight
Part # and Price
3.750 6 Bolt Flange 2.375 413 426W 426 Hemi and 440 6.760 2350 440-3750ME6F

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3.750 8 Bolt Flange 2.200 413 426W 426 Hemi and 440 6.760 2350 426-3750MC6F

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3.750 8 Bolt Flange 2.375 413 426W 426 Hemi and 440 6.760 2350 426-3750ME6F

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4.150 6 Bolt Flange 2.200 413 426W 426 Hemi and 440 6.760 2350 440-4150MC6F

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4.150 6 Bolt Flange 2.375 413 426W 426 Hemi and 440 6.760 2350 440-4150ME6F

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4.150 8 Bolt Flange 2.200 413 426W 426 Hemi and 440 6.760 2350 426-4150MC6F

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4.150 8 Bolt Flange 2.375 413 426W 426 Hemi and 440 6.760 2350 426-4150ME6F

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4.250 6 Bolt Flange 2.200 413 426W 426 Hemi and 440 6.760 2350 440-4250MC6F

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4.250 8 Bolt Flange 2.200 413 426W 426 Hemi and 440 6.760 2350 426-4250MC6F

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4.375 8 Bolt Flange 2.200 413 426W 426 Hemi and 440 6.760 2350 426-4375MC6F

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4.500 8 Bolt Flange 2.200 413 426W 426 Hemi and 440 6.760 2350 426-4500MC6F

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FORD 302

Stroke Description and Notes Rod Pin Dia. Main Journal Size Min
Rod
Length
Bob
Weight
Part # and Price
3.250 302 Ford with 302 width rod pins, 3.250 stroker crank 2.100 302 5.400 1750 302-3250GB6F

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3.400 302 Ford with 302 width rod pins, 3.400 stroker crank 2.100 302 5.400 1750 302-3400GB6F

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FORD 351

3.500

50 pound Ford Late Model Stock

50 pound Legal with rounded leading and trailing counterweight edges

2.100 351 Cleveland 6.000 1450 351-3500HB6F-RN

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3.750 351 Ford with 2.100 small block Chevy size rod pins 2.100 351 Cleveland 6.000 1900 351-3750HB6F-60

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3.850 351 Ford with 2.100 small block Chevy size rod pins 2.100 351 Cleveland 6.000 1900 351-3850HB6F-60

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4.000 351 Ford with 2.100 small block Chevy size rod pins 2.100 351 Cleveland 6.000 1900 351-4000HB6F-60

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4.000 351 Ford with 2.100 small block Chevy size rod pins 2.100 351 Cleveland 6.200 1900 351-4000HB6F-62

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FORD Big Block 429 and 460 | 385 Series Engines

4.300 429 and 460 Ford with 2.200 big block Chevy size rod pins 2.200 460 6.700 2300 460-4300PC6F

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4.500 429 and 460 Ford with 2.200 big block Chevy size rod pins 2.200 460 6.700 2300 460-4500PC6F

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4.600 429 and 460 Ford with 2.200 big block Chevy size rod pins 2.200 460 6.700 2300 460-4600PC6F

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FORD 4.6 MODULAR

3.543

Extreme Duty 4.6 Billet Crank Stock Stroke 3.543

8 counterweight billet steel crank with full fillet bearing journals. Bearings will need to be narrowed or chamfered to clear the fillets.

8 counterweight cranks are also referred to as fully counterweighted or center counter weighted.

Stock 4.6

2.086

Stock 4.6

2.657

5.933 1780 281-3543SJ8B

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Pontiac 400

Stroke Description and Notes Rod Pin Dia. Main Journal Size Min
Rod
Length
Bob
Weight
Part # and Price
4.250 400 Pontiac with 2.200 Rod Pins 2.200 400 6.535 2150 401-4250RC6F

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4.375 400 Pontiac with 2.200 Rod Pins 2.200 400 6.535 2150 401-4375RC6F

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4.500 400 Pontiac with 2.200 Rod Pins 2.200 400 6.535 2150 401-4500RC6F

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4.650 400 Pontiac with 2.200 Rod Pins 2.200 400 6.535 2150 401-4650RC6F

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Sport Compact 4340 Steel Billet Cranks

Stroke Description Rod
Pin
Main Min
Rod
Length
Bob
Weight
Part #

MITSUBISHI Cranks Lightweight

88mm Mitsubishi 4G63  Lightweight stock stock     M8804G63-L
$1672.24 $1444.31

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94mm Mitsubishi 4G63  Lightweight stock stock     M9404G63-L
$1672.24 $1444.31

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97mm Mitsubishi 4G63  Lightweight stock stock     M9704G63-L
$1672.24 $1444.31

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100mm Mitsubishi 4G63  Lightweight stock stock     M10004G63-L
$1672.24 $1444.31

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SUBARU Cranks

75mm Subaru EJ20 and EJ25 stock stock     S750EJ20
$1625.79 $1404.19

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79mm Subaru EJ20 and EJ25 stock stock     S790EJ25
$1625.79 $1404.19

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83mm Subaru EJ20 and EJ25 stock stock     S830EJ25
$1625.79 $1404.19

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Chrysler and Dodge Gen 3 Hemi Reluctor Gear

Molnar 5.7 6.1 6.4 hemi reluctor ring

For use with Molnar Technologies Gen3 Hemi Crankshafts

Description Part #

This reluctor gear is the correct one to use with Molnar Technologies Gen 3 Hemi stroker cranks in engines requiring a 32 tooth reluctor. It uses a 4 bolt attachment which is the same as the OEM Chrysler 6.1 crankshaft. The 2003 - 2008 5.7 and 6.1 used the 32 tooth wheel.

 

MRR-32

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If you have a 2009 or newer Gen3 Hemi with a 58 tooth reluctor and a Molnar Technologies crankshaft, this is the correct gear for you. (NOTE: Some people count the teeth on the 2009 and later as 60, but difference is only in how people count the large teeth, so even though some people say 58 and some 60, they are both the same reluctor) MRR-60

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2013 and Newer:

Chrysler / Dodge changed the OEM reluctor and engine management system in 2013. If you are working with a 2013 or newer vehicle and a Molnar Technologies crankshaft, then this is the proper 58 tooth reluctor to use.

MRR-6013

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Molnar Connecting Rods

Molnar Rods HP Rating

 

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