At Performance Research Industries, we have been applying our tried & true performance techniques that have won so many Superbike races in the past to our Spitfire engine rebuilds with astonishing dyno and racetrack results. Our "entry level" stage one Spitfire rebuild is nearly doubling the horsepower of these engines in their original state. (Spring issue of "Spitfire & GT6" magazine)
STAGE 1 ENGINE REBUILD
Our stage 1 engines are precisely machined and meticulously assembled. They are built with care and attention to detail.
Cylinder Head Work
Hot tank cleaning
Magnafluxed for cracks
Blend porting
Performance valve job
C.C. combustion chambers and Surface head to desired compression ratio
Rebuild rocker assembly
New rocker shaft
New rockers
New valve guides
New intake and exhaust valves
New valve springs
New spark plugs
New freeze plugs
New paint
New hardware if needed
New gasket set
Block Work
Hot tank cleaning
All parts magna-fluxed for cracks
Line bore main saddles if needed
Rebuild rods, resized big end, re-bushed small end, polish beams, match weights
Bore and hone cylinders
Turn (if needed) and polish crankshaft
Regrind camshaft
Degree camshaft
Set piston deck height
Match piston weights
Balance crank assembly
New piston set
New rod bushings, bearings and bolts
New cam bearings if applicable
New main and thrust bearings
New lifters
New cam chain (gear if needed)
New oil pump
New water pump
New seals and gaskets
New oil galley plugs
Paint
Freeze plugs
*This price does not include re-sleeving block if necessary.
A new clutch assembly is recommended for balancing with the newly rebuilt crank assembly. P.R.I. warranties only non-upgraded stage 1 engine packages on a "conditional" 12 months or 12,000 miles.
All parts for the stage 1 rebuild are o.e. type and not P.R.I. parts. All P.R.I. parts are discounted 10% with in-house precision rebuilds for performance upgrading.
(Any performance upgrades other than what is listed below will void this warranty)
Extras!
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CARBURETION: Single Weber, 2 barrel draft progressive. Keihin CR, side draft quad set 31mm only.
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EXHAUST SYSTEMS: Any header and free flow exhaust is OK but must be in optimum condition. We currently offer "modified" PaceSetter headers and our own tuned performance exhaust systems.
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P.R.I. modified PaceSetter header
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P.R.I. performance exhaust systems for Spitfire
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Replacement catalytic converters
Catalytic converter systems: must be new with no cracks in manifold, or replaced with a performance header. We have after- market rebuilt cats for those unfortunate cars that may still require them.
Speciality Built Engines - Stage 1, SPITFIRE = $3,900.00 USD
STAGE 2 ENGINE REBUILD
All that is done on the Stage 1 Engine Rebuild plus the following:
Cylinder Head Work
Extreme performance cylinder head conversion kit
Roller rockers chose from 1.55 or 1.65 ratio
Maximum port work flow bench tested
Block Work
Complete engine ARP hardware set
Exterior oil line to feed rocker shaft
Stock rods are lightened, polished and shot peened
Light tubular push rods
Lightened lifters
Lighten flywheel
Additional parts 10% Discount
(with the exception of the ARP hardware already discounted)
Speciality Built Engines - Stage 2, SPITFIRE = $5,900.00 USD
STAGE 3 ENGINE:
Professional Race Application
All that is done on the Stage 2 Engine Rebuild plus the following:
Cylinder Head Work
P.R.I. Pro comp series head conversion kit (Titanium valves available)
Block Work
4340 Chrome Moly steel, or Titanium connecting rods. PRI designed ultra-light JE piston set with gapless low friction ring package. PRI Stage 3 cam - PRI tubular Chrome Moly "heat treated" push rod set - PRI crank case venting kit w/K&N filter.
Stage 3 engines are also built in street-able specification.
Speciality Built Engines - Stage 3, SPITFIRE = $9,000.00 USD
We do not email info about our engines.
Please call if you are seriously interested. 541-459-5442
For pricing and availability please call (541) 459-5442 or e-mail: info@prirace.com