422 Stroker Small Block

[MRL Performance]

Ok, here is another one ready for dyno testing. I know you guys like to guess the power, so here we go.

340 block 4.100" bore 4.00" stroke 422ci
RPM heads Stage 2 ported w/2.055/1.60 valves 63cc measured
Comp dual springs/locks/retainers
Diamnod Flat Top Pistons 12.4 to 1
SCAT I beam rods/crank
Coated piston skirts/valves/bearings
Custom made 3/8 pushrods(made in house )
PRW 1.6 stainless roller rockers w/ billet hold downs
Comp XR286R solid roller cam
MRL Solid roller lifters
Weiand Stealth Intake(special mods )
Holley Ultra HP 850
Proform electric water pump

This is a rather smallish cam, and yes its a Comp Cam. They had it, so Im using it. I would rather use a Voodoo, but money was tight and Im working the best I can with what they got.

So how much power will it make????????

 

[Chryco Psycho]

465 hp around 6000 rpm
380 ft lbs 4600 rpm ??

 

[MRL Performance]

Oh God I hope Not!!!! Maybe +100 from that on HP and +200 for tq

 

[Chryco Psycho]

Well I always lean on the low side , that way the customer is impressed not disappointed , it also depends what dyno you are using as no two are close , Mustang is tough Dyno Jet always reads much higher & what altitude you are at etc . the real # is the Timeslip
with the actual weight of the car & driver .

 

[projectmopar]

Have a question on using my block and top end, turning it into a 422 c.i. motor. What do you figure the approximate cost would run with you providing a stroker kit, machine work, labor for a running motor? Two things you would need to do is machine a dip stick hole in the block as the "R3" race block doesn't have one which is a pain and worries me with not having the ability to check oil and levels. End up changing oil more than probably needed because of this issue. The second would be 4 bolt Billet caps on crank.

See my current motor specs and parts that could be used. Had the motor dyno in Denver (mile high - 5,800') a few years ago at 546hp.

Block:​

Mopar “R3” race block with 2 bolt Billet caps.

Deck Height:​

9.00”

Bore:​

4.070”

Stroke:​

3.31”

Rods:​

GRP aluminum rods, ARP 2000 cap screws

Crank:​

Mopar steel

Pistons:​

JE forged, 13.2-1 comp. - .030 over

Wrist Pins:​

Tool steel pins.

Rings:​

C&A file fit

Oil Pan:​

Milodon 7 Qt

Oil Pump:​

Melling

Pickup:​

Milodon

Balance:​

Internal

Camshaft:​

Comp Cams #CRS 310C-R6

Lifters:​

Comp Cams roller lifters

Pushrods:​

Custom

Chain:​

Gear drive

Timing Cover:​

Mopar

Water Pump:​

Moroso Electric

Head Gaskets:​

Fel Pro 1008

Cylinder Heads:​

Mopar W2 (ported & polished) match Indy's CNC heads for air
movement.

Valve Springs:​

Comp Cams

Retainers:​

CV Products Chrome Moly

Locks:​

CV Products Chrome Moly

Seals:​

Fel Pro 11/32” Rubber

Seat Cups:​

None

Rocker Arms:​

Comp Cams Pro S. Steel 1.5:1

Valve Covers:​

Mopar Cast Aluminum

Intake Manifold:​

Victor W2 Single Plane (ports match heads)

Manifold Gaskets:

Mr. Gasket Ultra seal
Carburetor Adapter:​

Moroso 2”

Carburetor:​

Barry Grant Race Demon / 775 cfm w/slvs

Distributor:​

MSD Distributor / 6-AL ignition (two step)

________________________________________________________

Please PM me on cost so we don't take up space here, second thought would be maybe others are interested in your thoughts too? Thank you.

:wav:​

 

[MRL Performance]

Is this a Siamese bore block? And its a low deck 9.00"? Not a real good idea running a 4.00" stroke crank with such a low deck, the rod would have to be too short or the piston would look like a Hockey Puck. The best you can hope for is a large bore medium stroke engine and get around 410-417 and still have a short piston.

But depending on head flow and chamber cc size, on e of my "special" solid roller cams, you could be looking at 650-700HP.

 

[MRL Performance]

560HP 547TQ

http://youtu.be/XSnj02718I4

I will post the dyno sheet later

 

[AlleyoopMgv]

Thats some good power!

 

[MRL Performance]

Dyno sheet

 

[Chryco Psycho]

Well done !!

 

[MRL Performance]

We hit our goal of 550hp, and then some. Torque was good too.