2011 Manton Catalog

7/17/2019 2011 Manton Catalog

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2 Manton Rockerarms Tech: 951.674.2212

Our long term goal is to provide valve train products capable of providing superior performance, reliability and durability in

applications where engine speeds will exceed 10,000+ RPM and provide stability far past that number. When rst approaching

this project we found several issues needing attention. As we worked through the design process we incorporated a solution

to each one of the following issues:

Rockerarm Geometry: Proper rockerarm geometry is critical in any engine assembly, especially with engine speeds inexcess of 10,000+ RPM. There is nothing magical or mysterious about the subject, so instead of just a guess we followed

some basic rules and corrected the geometry of our Top Alcohol rockerarm assemblies. We incorporate this basic geometry

theory in everything we design. Manifold boost and cylinder pressure are also a major consideration in this process. We feel

rockerarm geometry to be dynamic, not static.

Oil Transfer and Oil Leaks: We oil our assembly through the fourth cam bearing as with most Chrysler type blocks.

From there, through a series of transfer passages, the oil lls both shafts. Radial transfer passages provide full time oiling to

the intake and exhaust adjusting screws / pushrod cup interface through the adjusting screw. This is commonly referred to as

“Forced Oiling”. Very tight clearances between the rockerarm stands and the shafts help to eliminate the majority of the excess

oil spillage and pressure loss. Threaded plugs are used in each shaft to minimize the possibility of pressure loss out the ends

of the shafts. When changing over from the stock rockerarm assembly to the Manton assembly you can expect an oil pressure

increase of 10 to 15 pounds. Our rockerarm assemblies DO NOT require the use of restrictor jets.

Strength, Stability and Rigidity: By adding the strength and support of a load screw at each rockerarm we have more

than doubled the strength of the assembly. By using heavy duty rockerarm shafts and attaching the shafts to the stands with

the load screws we have again strengthened the assembly. Each of the materials used have been selected for their ability to

do its specic job. The heat treat procedure and preparation for each material also has been carefully selected. Bottom line

is we have produced a nished product that has the ability to maintain valve train control at engine speeds over 10,000 RPM.

Five years of race day testing and hundreds of hours of lab tests have allowed us to offer a suggested valve train combination

that is stable far past 10,900+ RPM and at the same time, the service life of the valve springs, roller lifters and all valve train

components will be extended. The strength and rigidity of each component in combination with each other allows for a nished

product that performs very well, in the most extreme environment. Some say, “a little ex is good”. We Respectfully Disagree.

Our response is, “If a little ex is better than why do F1 and INDY engines not use Pushrods”?

In the past we have referred to our stands as Low and High ratio. This reference is to the exhaust rockerarm ratio. Low being

1.6 to 1 and high being 1.7 to 1. The intake ratio remains the same in either choice. Over the past 5 years the demand for

the Low ratio assemblies has been completely replaced by requests for our High ratio assembly. It stands to reason that if it

becomes necessary to slow down the exhaust side, it is cost effective to accomplish this with a camshaft change instead of a

more costly rocker assembly. For this reason we no longer offer the low ratio rocker assemblies formerly listed in our printed

material.

Rockerarm Assemblies (Including Investment Cast Intake Rockerarms)

RA 44030 Alcohol Head, High Ratio (Excluding Exhaust Rockerarms)

RA 44050 Alcohol Head, High Ratio (w/ Manton Roller Billet Exhaust)

RA 44240 Total Flow / Chuck Ford Alcohol Head, Standard Ratio (Excluding Exhaust Rockers)

Rockerarm Assemblies (Including Billet 4340 Intake Rockerarms)

RA 44060 Alcohol Head, High Ratio (Excluding Exhaust Rockerarms)

RA 44080 Alcohol Head, High Ratio (w/ Manton Roller Billet Exhaust)

RA 44280 Total Flow / Chuck Ford Alcohol Head, High Ratio (w/ Manton Roller Billet Exhaust)

Rockerarm Shaft Assembly



Sales: 951.245.6565 Manton Rockerarms

Top Alcohol / Pro Mod / “A” Fuel

We have taken an aggressive approach in the design of our Top Alcohol and ProMod intake rockerarms. It has been

designed to be an upgrade replacement for the intake rockerarm being used today in the Top Alcohol, “A” Fuel and Pro

Mod categories.

Changes have been made in several areas to improve the performance of the valve train. This will help correct some

physical geometry issues that have come about through cylinder head changes over many years. Changes in valve lift

increased spring pressure, installed spring height and changes in the location of the intake rockerarm shaft have made i

necessary to correct the valve side fulcrum length of the rocker body. This change locates the roller bearing closer to the

center of the valve which decreases the possibility of the bearing running off the edge of the contact patch. The fulcrumlength, on the pushrod side of the rockerarm, is also increased to correct the rockerarm ratio. These corrections provide

additional pushrod clearance and applications where a 7/16” diameter pushrod is being used it becomes possible to

increase the pushrod diameter to 1/2”. This improves the stability of the valve train at engine speeds above 8,500 RPM

and as high as 11,000 RPM.

Standard Features:

Oil Pressure Fed 7/16” Diameter Adjusting Screws

Replaceable Axel Pins and Roller Wheels

Valve Side Fulcrum Length 1.675”

Aluminum Bronze Bushing

.625” Diameter Lock Nuts

Materials of: Lost Wax Investment Cast Rocker Body

17-4 Stainless Lost Wax Investment Cast BodyH-13 Tool Steel Adjusting Screw

CPM1V Tool Steel Roller Wheels

9310 / Copper Masked and Case Hardened Axel Pin

Materials of: 4340 BILLET Rocker Body

4340 SteelH-13 Tool Steel Adjusting Screw

CPM1V Tool Steel Roller Wheels

9310 / Copper Masked and Case Hardened Axel Pin

Part Number Description Investment Cast Rockerarms

RA 1802 Intake Rockerarm 1.80 to 1 Ratio with 3/8 Ball


Part Number Description 4340 Billet Rockerarms



Intake Rockerarms




Top Fuel Billet Intake Rockerarms Fulcrum Length 1.600”

We took on the task of producing a Billet Rockerarm to replace the existingstainless steel casting. This design will out perform all it’s competition.To stay in line with the existing valve train format being used by all ofthe NHRA and IHRA Top Fuel and Funny Cars, at this time, we havedecided to maintain the design geometry all of us are familiar with.This is to have a fulcrum length of 1.600”.

The design incorporates an I-Beam design which strengthens andstiffens the part, minimizing deection and additional material hasbeen added around the back side of the oil pressure fed adjustingscrew. This reduces the possibility of the adjusting screw being tornaway from the rocker body.

The roller bearing axle pin has been designed to allow for easy replacement in the eld. Adjusting screws are H-13 ToolSteel and incorporate an oil band for an all pressure fed rocker body. The Manton Billet Intake Rockerarm is producedfrom 4340 Chromoly on a four axes milling center. The proven Heat Treat procedure is the same used by MantonPushrods. The Manton Billet Rockerarm can be used in Top Alcohol / Pro Mod / Injected Fuel applications as a directreplacement for Stage V rockerarms of the same ratio designation.

Part Number Description Application

RA 1709 Billet Intake Rockerarm (1.70 to 1 Ratio) w/ 7/16 x 20 x 3/8 ballRA 1759 Billet Intake Rockerarm (1.75 to 1 Ratio) w/ 7/16 x 20 x 3/8 ballRA 1809 Billet Intake Rockerarm (1.80 to 1 Ratio) w/ 7/16 x 20 x 3/8 ball

The Manton Top Alcohol Billet Rockerarm is an I-Beam replacement for our 17-4 Investment Cast Rockerarm and isprimarily designed to be used on a Manton Top Alcohol Rocker Assembly. The primary difference between our FuelRockerarm and our Alcohol Rockerarm is the fulcrum lengths.

Most rockerarms used on Dechelis, Co-Line, AJPE and BAE rocker shaft assemblies have a fulcrum length of 1.600”.The Manton Top Alcohol Billet Rockerarm has a valve side fulcrum length of 1.675”. This was done to allow the use oflarger diameter pushrods and correct the roller bearing contact point on the valve.

The I-Beam Billet Top Alcohol Rockerarm incorporates all of the same features as the Billet Top Fuel Rockerarm. Theroller bearing axle pin has been designed to allow for easy replacement in the eld. Adjusting screws are H-13 Tool Steeland incorporate an oil band for all pressure fed rocker bodies.

Part Number Description ApplicationRA 1807 Billet Intake Rockerarm (1.80 to 1 Ratio) w/ 7/16 x 20 x 5/16 ballRA 1808 Billet Intake Rockerarm (1.80 to 1 Ratio) w/ 7/16 x 20 x 3/8 ballRA 1907 Billet Intake Rockerarm (1.90 to 1 Ratio) w/ 7/16 x 20 x 5/16 ballRA 1908 Billet Intake Rockerarm (1.90 to 1 Ratio) w/ 7/16 x 20 x 3/8 ball

Top Alcohol Billet Intake Rockerarms Fulcrum Length 1.675”




Part Number Description ApplicationRA 1600 R Top Fuel (1.65 to 1) Top Fuel / AJPE or Dechelis StandsRA 1600 TA STD Ratio (1.60 to 1) Top Alcohol Head, w/Manton, BAE, Co-Line StandsRA 1700 R Hi-Ratio (1.70 to 1) Top Alcohol Head, w/Manton, BAE, Co-Line Stands

Adjusting screws are sold separately. See section below.

Top Fuel, Top Alcohol and Pro Mod rockerarm screws are made of H-13 tool steel that is heattreated triple tempered and nitrided for wear resistance. This screw is, by far, the strongest andmost durable rockerarm adjusting screw available today.

Part Number DescriptionRA 0825 “Screw” 7/16 x 20 Thread 5/16 Ball with Pressure Feed Side HoleRA 0826 “Screw” 7/16 x 20 Thread 3/8 Ball with Pressure Feed Side HoleRA 0830 “Screw” 7/16 x 20 Thread 13/32 Ball with Pressure Feed Side HoleRA 0850g “Jam Nut” 7/16 x 20 x .620 O.D. 12 PointRA 0850 “Jam Nut” 7/16 x 20 x .700 O.D. 12 Point

Adjusting Screws

Spark Plug Tubes

Exhaust Roller Tip Rockerarms After many requests from engine builders and race teams, our “NEW” RollerTip Exhaust Rockerarm has been added to our product line. The standardfeatures of the Manton “I-Beam Rockerarm” were incorporated into thedesign with the prime intention of increasing the strength, stiffness,stability and reliability required in the Top Alcohol and Pro Modcategories.

The I-Beam rocker design is not a new idea, in fact it is farfrom it. No one can claim to have the Original I-BeamRockerarm. If we look back in history we will realizethat the original Chrysler early HEMI rockerarm wasan I-Beam. Many other rockerarms designed as farback as 1918 were I-Beams. With that said, it is thepreferred design theory when it comes to structuralstrength and stiffness. That is true whether we aredesigning a building or a rockerarm.

Top Fuel engine assemblies produce cylinder pressures approaching 24,000 PSI. A-Fuel engines are in the range of13,000 PSI. In this case the exhaust rockerarm must be as strong as possible and at the same time stiff enough tomaintain valve train control.

The Manton Roller Tip, I-Beam Rockerarm provides the highest strength to weight ratio of any design conguration. Weuse 4340 steel billet to manufacture all of our billet rockerarms and each rocker body is heat treated to 305,000 P.S.IThis is not a forged rockerarm, it is a true billet rockerarm providing perfect grain alignment, which improves reliabilityand consistency. An oil passage supplies engine oil pressure to the adjusting screw which minimizes the possibility opushrod galling. This also limits unwanted and unnecessary oil spillage and oil pressure loss. The roller wheel has beenincreased in size to a very large .5710” diameter and the pin to .2756”. The increased pin diameter is necessary tomaximize the strength of the roller which has become increasingly important as cylinder pressures continue to increase

Small diameter spark plug tubes minimize the possibility of rockerarm to tube contact. These tubes are adirect replacement for your existing tubes. Top and bottom ends are billet aluminum and the tube body is4130 steel. The steel body will not dent or wear if the rockerarm rubs during operation. The tube diameterallows for an additional .040 of clearance. (O.D. = 1.180).“A minor modication must be made to the spark plug boot to allow the boot to enter the tube”.

Part Number Description ApplicationRA 0250 Small Plug Hole Spark Plug Tube Noonan X1, BAE, AJPE Muscle, Total FlowRA 0255 Large Plug Hole Spark Plug Tube Noonan X1, BAE, AJPE Muscle, Total FlowRA 0260 Large Plug Hole Spark Plug Tube Custom Length, Total Flow/Chuck FordRA 0265 Small Plug Hole Spark Plug Tube Custom Length, Total Flow/Chuck Ford




Rockerarm Shafts

With valve train stability being our main concern we manufacture our shafts to be very stiff. Our choice of material is.250” wall thickness 4130 Chromoly steel. Each pre-heat treated shaft is prepared in a four axis milling center, thencenter less ground undersize, hard chromed oversize and nish ground to size. This leaves a hard chrome surface .008”deep, providing excellent wear protection in any application, including use in your daily driven street Hemi. Our Fat Headshafts feature a new type of radial oil transfer passage which provides full time oiling to the pushrod and adjusting screw.

Without this new oiling feature the stock oiling passage is shut off as soon as the rockerarm starts to open the valve. Allof our shafts use a threaded plug to seal each end. This eliminates any chance of an oil leak from worn or poor ttingO-rings.

Part Number Description Size ApplicationRA 3010 Rockerarm Shaft (Intake) .250 Wall 426 Chrysler HemiRA 3020 Rockerarm Shaft (Exhaust) .250 Wall 426 Chrysler HemiRA 3030 Rockerarm Shaft (Intake) .250 Wall Alcohol Head Manton StandsRA 3040 Rockerarm Shaft (Exhaust) .250 Wall Alcohol Head Manton StandsRA 3050 Rockerarm Shaft (Intake) .250 Wall Fat Head using “BAE” StandsRA 3060 Rockerarm Shaft (Exhaust) .250 Wall Fat Head using “BAE” Stands

This valve spring tool comes to us from Ulf and Jörgen Leanders of Alfta Sweden. Beingmultiple time Top Alcohol Funny Car European Champions they understand the critical

need to maintain the valve train in their BAE powered race car and found a real needto check and replace valve springs within the 75 minute rule. This is the device

Jörgen designed to allow the quick and safe removal of springs between rounds.Four rocker stand attaching nuts on each head, replace the four twelve pointmounting nuts and remain on the car. These nuts are the mounting hardwarefor the spring tool. After a run you remove the valve cover and, in a matter of30 seconds you install the tool assembly. Rotate the engine to allow the valve

to seat, insert the pressure gauge. Add pressure to the spring using the loadscrew until the valve just moves. This will show the seat pressure of the spring. If

replacement is required, you simply replace the gauge with the compression tool andremove the spring. Turn the load bar over and check the second spring on the same

cylinder. Move to the next cylinder and repeat the process. Switch sides and check theother head. You can check all sixteen valve springs on a Top Alcohol, Pro-Mod or Injected

Fuel engine in less than ten minutes.

Part Number Description Application w/ T-HandleRA 0200-M Checking & Replacement Tool Top Alcohol using, Manton StandsRA 0200-RB Checking & Replacement Tool Top Alcohol using, BAE Red or Black StandsRA 0200-SB Checking & Replacement Tool Top Alcohol using, BAE Silver or Blue Stands

Part Number Description Application w/ Socket DriveRA 0201-M Checking & Replacement Tool Pro-Mod using, Manton StandsRA 0201-RB Checking & Replacement Tool Pro-Mod using, BAE Red or Black StandsRA 0201-SB Checking & Replacement Tool Pro-Mod using, BAE Silver or Blue Stands

Valve Spring Checking & Replacement Tool (Leanders Bros.)




Manton Pushrod Length Checking Kit Tools

Tools Part Number Description

RA 0630 Chrysler Hemi Pushrod Checking Kit

RA 0120 Pre-Oiler (One Gallon)

RA 0102 MSO-68 Assembly Lube (4oz)

RA 0103 Ultra Gel Moly Lube (3oz)

Chrysler Hemi Pushrod Checking Kit

Includes 4 pushrod length checking tools (10.000” to 14.000”), with

two 5/16 cups and two 3/8 cups. Also two checking springs are

included in the kit. A must for all Top Alcohol / Top Fuel / and Pro-

Mod engine builders.

Part Number RA 0630


RA 0737 3/8” Flange Washer Rockerarm Stand Mounting / Intake Manifold Washer

RA 0743 7/16” Flange Washer Rockerarm Stand Mounting / Head Bolt Washer



Hardware Part Number Description

RA 0851 Rockerarm Stand Nuts 3/8 x 24 12 Point

RA 0220-20 Rockerarm Stand to Head Studs 3/8 x 2.750 x Coarse & Fine Th

RA 0250 Spark Plug Tubes (Fat Head - Stage V)

RA 0255 Spark Plug Tubes (Fat Head - Stage VI)RA 2315-20 Rockerarm Stand Load Screws - 5/16 x 1.750 Socket Head (20 e

RA 2400-8 Pipe Plugs 1/16 Pipe Brass - Socket Head (8 each)

RA 2405-8 Pipe Plugs 1/8 Pipe Brass - Socket Head (8 each)

RA 2410-8 Oil Restrictor 1/16 Pipe x .080 - Socket Head (8 each)

RA 2420-8 Oil Restrictor 1/16 Pipe x .125 - Socket Head (8 each)

RA 2430-8 Shaft Plugs 3/8 x 24 - Socket Head (8 each)

Rockerarm “Shaft Springs”

Rockerarm “Shaft Clamps”

Rockerarm shaft springs have been preferred by most over locating clamps. Springs are trouble free, require no attention

and allow you to service the engine without the worry of leaving a screw untightened. Coiled from music wire they

provide 7.5 pounds of pressure at 1.950” height. This pressure is slightly higher than the common spring. Rockerarm

shaft shims are stamped from 1085 spring steel and heat treated for wear resistance.

Rockerarm shaft clamps do a very good job of holding the rockerarm in position during operation. Most HEMI engines

use a spring to statically push the rocker against the rocker stand and the angularity of the pushrod maintains the rocke

in that position. During valve train surge the only alignment provided is from the interference of the pushrod and the

access hole in the cylinder head. The good stability is achieved by using a large diameter pushrod, which limits thelateral travel of the rocker body on the shaft. By using a shaft clamp the rocker body is held in position even during harsh

valve oat.


RA 2200 Spring Kit (7 Long / 1 Short / 24 shims) Chrysler Hemi (One Head)

RA 2201 Spring Kit (8 Long / 24 shims) Fat Head (One Head)

RA 2210-16 Shims .876 x .1210 x .016 (16 each) All with .875 Diameter Shaft




RA 2350-8 .875 I.D. Aluminum Clamps (8pcs.) All with .875 Diameter Shaft

RA 2350-16 .875 I.D. Aluminum Clamp (16 pcs.) All with .875 Diameter Shaft



601 Crane Street, Building C • Lake Elsinore, CA • 92530

Tech Line: 951.674.2212 • Sales Line: 951.245.6565

ShippingOrders will be shipped UPS ground unless another shipping method is requested. Remember we are located in California so if you are located

far from us you may want to request faster service. It may take a week for packages to reach the east coast. The carrier has full responsibility

for all merchandise once the package leaves our facility. All damage or shortage claims must be reported to the carrier immediately.

ReturnsNo returns will be accepted without prior authorization. Any merchandise returned due to manufacturing defects or shipping errors will be

corrected at no charge.

Warranty Manton Rockerarms will repair or replace at our discretion any item manufactured by our company that is found to be defective in material

design and/or workmanship. The invoice must accompany the merchandise to verify the purchase. We reserve the right to inspect any

merchandise returned for misuse, abuse, modification or defective installation. All merchandise distributed by Manton Rockerarms is

guaranteed in accordance with the manufacturers own terms of warranty.

Terms All orders are C.O.D., cashiers check or credit card unless prior arrangements have been made. We accept Mastercard and Visa only. If

you are an open account customer and you exceed 30 days to pay an open invoice you may be put on C.O.D. without notice. If you are a

customer approved for business or personal checks and your check bounces, you will be responsible for all check charges incurred by us and

you may also be put on certified check or credit card.

2011 Manton Catalog

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