IMP - DAVRIAN - GINETTA - CLAN

PARTS & SERVICES PRICE LIST

 

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MODIFIED CYLINDER HEADS

All head prices are based on exchange (non exchange surcharges apply as on page 10 reconditioned heads)

Standard early type MK2 heads 7010333 + 7010171

As these heads have no facility for oil draining from head to block, top hat seals are used which foul with .310" + lift, cams to overcome this problem. I fit B1 seals, shortened valve guide (cam side) and extra strong single valve springs up to .360" lift cams can be used with this arrangement. MK2 late (L4) 71981533 have oil drain, these heads are supplied without seals.

ALL MK2 HEAD PRICES INCLUDE NEW VALVES + SPRINGS ASSEMBLED

CAPACITY: i.e. 875cc heads are suitable for 930cc where as 988cc if machined for the larger 79.7 o/d Wills ring then suitable up to 1200cc.

 
STAGE VALVE SIZES SPECIFICATION
875cc 1 1.2" x 1.06" gas flowed ports + balanced chambers 240.00
875cc 2 1.28" x 1.06" as above + larger exhaust port + inlet valve equivalent to sport head 300.00
875cc 3 1.28" x 1.06" enlarged inlet/exhaust ports + reshaped balanced chambers 360.00
998cc 2 1.28" x 1.06" as 875cc with reshaped chambers 340.00
998cc 3 1.28" x 1.06" as 875cc with reshaped chambers 400.00
998cc 4 1.28" x 1.125" enlarged ports reshaped chambers 430.00
Above 998cc heads can be machined for Wills rings for additional 60.00
875cc/930cc alternative 1.32" inlet and/or 1.125" exhaust P.O.A
998cc larger inlets if required -1.32"/1.37" 1.4" P.O.A
   
MODIFIED SPORT CYLINDER HEADS (price includes guides) READY TO FIT VALVES
   
STAGE VALVE SIZES SPECIFICATION 7100180/7010162/7010107
875cc 2 1.28" x 1.06" gas flowed ports + balanced chambers 160.00
875cc 3 1.28" x 1.06" enlarged exhaust ports/gas flowed inlets, balanced + reshaped chambers 190.00
875cc 4 1.28" x 1.06" enlarged inlet + exhaust ports, balanced + reshaped chambers 220.00
875cc 5 1.32" x 1.06" as stage 4 + larger inlet valve 240.00
875cc 6 1.32" x 1.125" as stage 4 + larger inlet/exhaust valve 270.00
       
998cc +2 1.28" x 1.06" gas flowed ports + balanced chambers 170.00
998cc +3 1.28" x 1.06" as 875cc with opened up chambers 190.00
   
MODIFIED SPORT HEADS machined for Wills rings
   
998cc + 3w/r 1.28" x 1.06" as above machined for Wills rings 290.00#
988cc + 4w/r 1.32" x 1.06" as above + larger inlet throat + port 330.00#
988cc + 5w/r 1.32" x 1.125" enlarged ports + reshaped chambers 360.00#
988cc + 6w/r 1.4" x 1.06" large inlet/small exhaust valve 390.00#
988cc + 7w/r 1.37" x 1.125" intermediate inlet + large exhaust valve 420.00#
988cc + 8w/r 1.4" x 1.125" largest conventional valve sizes 420.00#
 
# HEAD PRICES ARE FOR IRON GUIDES + INLET SEATS. BRONZE EXHAUST SEATS (suitable for unleaded fuel)
 
IMP FULL RACE CYLINDER HEAD

for 72.5mm bore (988cc) or 74mm (1040-1190cc) engines.

SPECIFICATION (A)

Sport head, pressure tested, bridged welded across waterway slots to strengthen machined Angle face and add support to machined grooves for Wills rings, Exhaust port increased diameter (26mm), Inlet port increased diameter with off set bias to encourage swirl induction, full radius multi angle alloy bronze valve seats leading into venturi shaped throat, Bronze alloy tapered valve guides, Valves reshaped highly polished 1.37" inlet - 1.190" exhaust, Chambers reshaped and equalised for high compression, Valve springs race (10,000rpm) shimmed to equalise fitted length, Tempered spring caps/cotters.

PRICE OUTRIGHT: 840.00/or EXCHANGE: 800.00

SPECIFICATION (B): 740.00/or EXCHANGE: 700.00

As above with 1.4" x 1.125" valves, steel inlet seats.

 

REG PATTEN
116 Courtney Crescent, Carshalton, Surrey SM5 4NB
(Collection/callers by prior arrangement only)

Phone/Fax: 020 8661 0183

Email: enquiries@hillmanimpspecialists.com

 

R.S. Patten 116 Courtney Crescent Carshalton Surrey SM5 4NB
Email: enquiries@hillmanimpspecialists.com