Mini Cooper Cylinder Head work descriptions
(Heads with - Cams $20 and Rockers $80 Extra)
Prices
REFRESH - A complete breakdown,
inspection,,
and cleaning of the
Head,
the
Valves,
Springs,
Hand Lap Valves,
Lube,
and re-assemble. (This is usually performed between races, and/or between racing seasons...)
[Read more details...]
$495
STAGE I - The "Head Refresh" process is performed, along with a
Competition Multi-Angle valve job,
then re-assembly and vacuum testing.. (This is usually performed when valves do not seal, need replaced, or at high mileage intervals, during ANY engine rebuild, or if ANY engine damage has occured)
[Read more details...]
$595
See DYNO Results of Stage II Head, Bolted onto STOCK R53/Mini Cooper "S"- stock valves (read the story...)
STAGE II - The "Head Refresh" process is performed, along with a
Competition Multi-Angle valve job,
then 30mm "pocket port" job, chamber buff, re-assembly and vacuum testing..
(This is a performance upgrade, allowing better overall power and torque)
[Read more details...]
$950
STAGE III - The "Head Refresh" process is performed, along with a
Competition Multi-Angle valve job,
then FULL port and polish job, chamber buff, re-assembly and vacuum testing..
(This is a Street/Strip performance upgrade, allowing much better overall power and torque)
[Read more details...]
$1,150
STAGE IV - The "Head Refresh" process is performed, along with a
Competition Multi-Angle valve job,
then FULL port and polish job, Modify and Polish Combustion Chambers,
CC Chambers and balance all four volumes plus/minus 0.4cc,
re-assembly and vacuum testing..
(This is a SERIOUS performance upgrade to overall power and torque)
[Read more details...]
$1,450
"SuperCooper" - The "Head Refresh" process is performed, then
New larger, (Fully Ceramic coated face) , Valves,(with new larger seats) are installed, Competition Multi-Angle valve job, DPR "Sniper™" Valve Guides installed,
then FULL port and polish job with coated exhaust ports, Fully Modified, Polished, and Coated Combustion Chambers, CC and balance Chamber Volumes +/- 0.15cc, Blueprint Rockers, Modify Oiling,
"Microlon" Treatment, re-assembly and vacuum testing Plus much much MORE!!!(This is a full COMPETITION product, intented for only VERY SERIOUS RACER's!!!) [Read MORE details...]
* Complete your SuperCooper™ Head with a NEW, DPR
"Stage V Camshaft"
- The "HOTTEST" Mini Cooper Cam on the Market, and DPR's NEW Mini Cooper, Custom profiled, Forged Racing Pistons, Pins, and Rings!!! *
$3,495
"EXTRAS" - Full list of Performance enhancements, additional modifications, polishing, coating(s), Microlon metal treatment, Chamber work, Surfacing, Camshaft and Cam Cap work, Throttle Body Modifications and Polishing, Rocker Arm blueprinting, Oil SYSTEM AND pUMP modifications, Water Pump Modifications, Valve Spring work, "Sniper™" Valve Guides and much more...
[Read more details...]
Select ANY picture to enlarge
Disassembly/Inspection
Detailed Inspection
Cleaning Parts
Remove Burrs
Check Valve Springs
Check Valve Guides
Check Valves
Measure Cam lobes
Measure bolts
Measure Retainers
Grind Valves
Lapping Surface
Microlon Treatment(s)
Clean Valve Trains
Guides Ready to Install
Springs Ready to Install
Dan at work, porting and polishing
Dan getting into his work...
Mini heads in Progress...
Finished head, ready to Assemble
DPR Racing's Famous BMW/Mini Cooper Cylinder Heads! Record Setting BMW/Mini Cooper's!!!
BMW/Mini Cooper - Head Refresh Procedure
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• Pre-inspect cylinder heads; Check to and insure all parts are intact,
and have arrived without damage.
Disassemble head for inspection and
clean, remove carbon and clean valve train components (without media blasting).
Failure Analysis is performed on the head and all attached components.
Everything is disassembled into parts, then cleaned, thoroughly.
Camshaft(s), If applicable, is/are checked for signs of wear, valve float, straightness,
thrust surface, and threads. Head cam journals and caps are checked for wear.
de-burred, lapped flat and made to fit precisely, to each polishing alignment dowel.
Remove and Inspect; Studs, Fasteners, Bolts, and threaded Holes for proper condition. Inspect each for damage
to threads, shank, head, and thrust surface. Check for rust, corrosion, and wear. Clean as
needed, then lubricate for re-assembly. "Chase" dirt from every threaded hole with thread chaser, solvent, "thread brush",
and compressed air. Inspect spark plug holes, clean and
restore the sealing surface. Polish the inside and outside of the spark plug access pipes.
Check all manifold and gasket mating surfaces for flatness, scratches, left over gasket material and/or sealer, and over all surface
condition."Radius", "Edge Break", file, polish, and surface lap, as needed to hand finish machining. Properly re-install all studs.
Inspect deck surface for cracks, flatness, roughness, corrosion,
scratches,
"dings", bore match up, and signs of detonation arcing.
Valve Springs Checked for damage, wear, height, pressure
and installed to correct specifications.
Inspect keepers and retainers for fit, wear and evidence of valve float.
Hand lap valves and re-inspect. Head is cleaned again, and Vacuum tested.
Final Inspection and Sign Off.
Final Assembly, using new valve seals(usually supplied with new "Head Gasket Set"), is done in "clean room" environment.
Pack with Instructions, Sign Off.
Approximately 38 lbs without cam and rockers - SHIPPING EXTRA ($TBD by location)
Cam removal, cleaning, and reinstall $20 extra
Rockers removal, cleaning, and re-install $80 Extra
Head Gasket set(required); Felpro O.E.M. includes-intake/exhaust manifold, valve cover/spark plug pipes, head gasket, valve seals($149) or MLS ($299)
Head Bolts(recommended); (O.E.M. "stretch" bolts $45) or (ARP bolts $$$)
BMW/Mini Cooper - Stage I Competition Multi-Angle Valve Job
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The "Head Refresh" process is performed, along with the following work:
Light debur
Lap, port faces and upper cap and gasket area for proper sealing.
Competition, high flow, multi angle, valve job
with preparatory angles.
Polish valve margins, Hand lap valves and re-inspect.
Set up proper seat pressure and clearances.
Final clean for assembly.
Preassembly inspection.
Final Assembly, including new valve seals, is done in "clean room" environment.
Vacuum test, and sign off.
Pack and Ship with instructions.
Cam removal, cleaning, and reinstall $20 extra
Rockers removal, cleaning, and re-install $80 Extra
Head Gasket set(required); Felpro O.E.M. includes-intake/exhaust manifold, valve cover/spark plug pipes, head gasket, valve seals($149) or MLS ($299)
Head Bolts(recommended); (O.E.M. "stretch" bolts $45) or (ARP bolts $$$)
BMW/Mini Cooper - Stage II - Multi-Angle Valve Job/Pocket Port Job
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The "Head Refresh" process is performed, along with the following work:
Complete Debur.
Lap, port faces and upper cap and gasket area for proper sealing.
Port and polish intake and exhaust.
Gasket match, port 30mm into ports and pocket port under seats.
Light combustion chamber polish.
Competition, high flow, multi angle, valve job
with preparatory angles.
Polish valve margins, Hand lap valves and re-inspect.
Set up proper seat pressure and clearances.
Final clean for assembly.
Preassembly inspection.
Final Assembly, including new valve seals, is done in "clean room" environment.
Vacuum test, and sign off.
Pack and Ship with instructions.
Cam removal, cleaning, and reinstall $20 extra
Rockers removal, cleaning, and re-install $80 Extra
Head Gasket set(required); Felpro O.E.M. includes-intake/exhaust manifold, valve cover/spark plug pipes, head gasket, valve seals($149) or MLS ($299)
Head Bolts(recommended); (O.E.M. "stretch" bolts $45) or (ARP bolts $$$)
BMW/Mini Cooper - Stage III - Competition Multi-Angle Valve Job, FULL Port & Polish Job
_______________________________________________________________________
The "Head Refresh" process is performed, along with the following work:
Complete Debur.
Lap, port faces and upper cap and gasket area for proper sealing.
Port and polish entire intake and exhaust.
Gasket match, and fully port intake and exhaust.
Lightly de-shroud combustion chamber polish.
CC Chamber and match all four volumes.
Competition, high flow, multi angle, valve job
with preparatory angles.
Back cut intake valves.
Polish valve margins, Hand lap valves and re-inspect.
Set up proper seat pressure and clearances.
Final clean for assembly.
Preassembly inspection.
Final Assembly, including new valve seals, is done in "clean room" environment.
Vacuum test, and sign off.
Pack and Ship with instructions.
Cam removal, cleaning, and reinstall $20 extra
Rockers removal, cleaning, and re-install $80 Extra
Head Gasket set(required); Felpro O.E.M. includes-intake/exhaust manifold, valve cover/spark plug pipes, head gasket, valve seals($149) or MLS ($299)
Head Bolts(recommended); (O.E.M. "stretch" bolts $45) or (ARP bolts $$$)
BMW/Mini Cooper - Stage IV -
Competition Multi-Angle Valve Job, FULL Port & Polish Job and Combustion Chamber Mods
_______________________________________________________________________
The "Head Refresh" process is performed, along with the following work:
Complete Debur.
Lap, port faces and upper cap and gasket area for proper sealing.
De-flashed inside and out.
Modify oil returns for better flow and distribution.
Competition FULL Port and Polish, Intake and Exhaust. Gasket match or any intake/exhaust design fully port.
Radius exhaust seats.
De-shroud combustion chamber polish.
CC Chamber and match all four volumes within .4 cc.
Competition, high flow, multi angle, valve job
with preparatory angles.
Back cut intake valves.
Polish valve margins, Hand lap valves and re-inspect.
Set up proper seat pressure and clearances.
Blue print with documentation.
Final clean for assembly.
Preassembly inspection.
Final Assembly, including new valve seals, is done in "clean room" environment.
Vacuum test, and sign off.
Pack and Ship with instructions.
Cam removal, cleaning, and reinstall $20 extra
Rockers removal, cleaning, and re-install $80 Extra
Head Gasket set(required); Felpro O.E.M. includes-intake/exhaust manifold, valve cover/spark plug pipes, head gasket, valve seals($149) or MLS ($299)
Head Bolts(recommended); (O.E.M. "stretch" bolts $45) or (ARP bolts $$$)
"SuperCooper™;" Mini - Stage V - New Larger Ceramic Coated Intake and Exhaust valves and New Seats,
FULL Port & Polish Job, FULL Combustion Chamber Mods +Plus Ceramic Coating, Oil System rework, Rocker and Keeper Blueprinting, and Much, Much, MORE...
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The "Head Refresh" process is performed, along with the following work:
Completely debur, remove flash and blueprint casting.
Lap, upper cap and gasket area for proper sealing.
DPR's special High Lift CAM/Spark Plug tube modification(s).
Install New DPR "Sniper™" Valve Guides.
Install New Black Nitrite +2.3mm exhaust, and +1.8mm intake valves,
TBC™ Ceramic Coat Intake and Exhaust face, and Exhaust radius.
Install New DPR PCS Valve Spring Kit(Springs and Titanium Retainers).
Super finish/Polish Rocker Shafts.
Modify block to head OIL system for better flow and distribution.
Competition FULL Port and Polish, Intake and Exhaust. Gasket match or any intake/exhaust design fully port.
Radius exhaust seats.
De-shroud combustion Chambers and polish.
CC Chambers and match all four volumes within .15 cc !!!
TBC™ Ceramic Coat Chamber, And Exhaust ports.
Diamond Finish Intake ports.
Competition, high flow, multi angle, valve job
with preparatory angles.
Back cut intake valves.
Radius and Polish valve margins, Hand lap valves and re-inspect.
Blue Print Rocker arms, and rocker shafts, including full OIL modifications.
Set up proper seat pressure and clearances.
Port Faces Lapped Flat (Studs removed, cleaned and reinstalled).
Deck Milled .040" & Lapped to increase compression.
Blue print with documentation.
Final clean for assembly.
Preassembly inspection.
Final Assembly, including new "VITON" Racing valve seals,
is done in "clean room" environment.
Vacuum test, and sign off.
INCLUDES New MLS .030" High Performance Head Gasket !!!
Pack and Ship with instructions.
- DPR Valves Oversize/Nitrite(+0.5, +2.0) (IN/EX) $160
- DPR PCS Valve Spring Kit(Springs and Titanium Retainers)
$380
- DPR Dual Springs $320
- DPR Titanium retainers (For single and dual springs, NOT PCS springs)
$220
- DPR's special High Lift CAM/Spark Plug tube modification(s) $20
- DPR's High Lift Cam/Rocker Arm Oiler Mod(s) $40
- DPR Mini "Sniper™" Racing Valve Guides $164
- DPR's Exclusive Competition BMW/Mini Cooper Camshaft(s)
View Specs and Pricing
Microlon - "As featured in
Street Performance Magazine,
our little BMW/Mini Cooper "S" picked up 3 1/2hp in an independent dyno test. The dyno tech couldn't
believe that Microlon would give that much performance."
- Microlon CL100 - Add to Engine,Trans,PS for newer 4-8 cyl
$183.96+shipping(Read about "Microlon" Products)
- Microlon Parts Treatment - Valves,Rockers,Cam(s),Springs & Retainers
$60
(Read more...)
- Combustion chambers matched to the bore. Deshroud valve area.
Shape and polish. $200
- Measure and record one combustion chamber volume $18
- Or balance all four volumes plus/minus 0.4cc $60
- Balance plus/minus 0.15cc $80
- Measure and match volumes with valves installed after seat cut $300
- Custom combustion chamber modifications such as high swirl
chambers, lower combustion chambers, stop chambers. Call for pricing!
- Modify Combustion chamber "Quench Area" to direct and shape
the explosion of combustion. $30/Cyl
Rockers (+Oil upgrades)
- Blueprint rocker arms: Micro polish roller tip, hand lap, and polish hydraulic
adjuster tip, polish rocker shaft bore, polish rocker shafts, including detailing plastic spacers.
$80
- Micro Polish/Super finish rocker shafts $10 each
- Rocker Arm and shaft Oiler upgrades; to thrust surface, and side "wipers" of arms, and modify rocker shafts oil outlets,
surface $155
- Lap deck surface $20
- Mill deck surface $60
- Increase block to head oil flow $40
Camshaft and Cam Cap Work (+Oil Upgrades)
- Micro Polish/Super finish Camshaft bearing Surface(s)
$20
-
Blueprint Cam $40
- Polish camshaft journals $40
- Align "polish" cam journals and caps $40
- Machine
oil groves in camshaft journals $40
- Machine
oil retention grove in cam cap $35
- Polish one set (16) cam cap dowel pins and dowel receiving bore.
Remove oxidation, rust, dings, dents, and corrosion for proper
fit, prevents seizing and improperly located caps. $50
Valve Guides
- Valve guide replacement includes removal of valve guide, bore
prep., Hone guide to fit valve stems, install new guide. $144 labor
- DPR Mini "Sniper™" Racing Valve Guides
$164 labor
Valve Springs, Retainers, and Keepers
- Hand lap
keepers
to tighten up fit. $20 labor
- Blueprint Springs (Req'd if using titanium retainers)
$40
- Blueprint new OEM Oil pump and Pickup, for better Flow, and better Lubrication. $45 labor
Water Pump
- Blueprint new OEM
Water pump, better Flow, better Cooling. $45 labor
Mini Cooper Custom cylinder heads can be supplied outright. Contact us for availability and details.
Stage VI and VII custom modifications available for COMPETITION USE ONLY!!!
* The SuperCooper™ and Sniper™ valve guides are
DPR EXCLUSIVE!!! *
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BMW/Mini Cooper - Head Refresh Procedure
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BMW/Mini Cooper - Stage I
BMW/Mini Cooper - Stage II - 
BMW/Mini Cooper - Stage III - 
BMW/Mini Cooper - Stage IV - 
