Performance". Only Boost Performance can offer Cosworth 24v Turbo cast iron exhaust
manifolds. Built to endure.
iron lasts much much longer then fabricated items, it's extremely tough and
durable which is why car producers use it. It won't twist, flex, warp or
crack like stainless steel. These manifolds have been designed for retrofit engine
installations. We can
offer them with a 4 bolt per flange fixing if required. The turbo/s can
be mounted onto the manifold (depends on turbo type) or remotely using
fabricated elbows or extensions.
supply adaptor flanges for remote locations if required. A single 2
into 1 turbo exhaust manifold (pictured at the bottom of this page -
http://www.chevroletls1.com/blueprinting.html) can be purchased for use
with single turbo diy installations for £265. Both exhaust banks feed
into one t3 frame turbo located on the passenger side of the engine.
£200 each or £380 a pair.
high strength Gen 2 forged turbo pistons
All our engines are assembled using
only premium quality custom made forged pistons designed to our own specification,
fitted with race type piston rings & taper wall gudgeon
pins. The internal components are individually balanced
and weight matched to a fraction of a gram where required and are significantly
lighter then standard. The crankshaft is then dynamically balanced
by machine. This produces a free revving engine with less
internal stress, that idles smoothly.
We still retain the Cosworth 24v crank (we offer a tuftriding service) and con-rods but precision billet or 'H' beam
steel rods are available to special order as is our girdled
sump assembly which strengthens and unites the lower block and main bearing
Our turbocharged engines with big-bowled pistons usually have
a compression ratio of 7:1 or 8.5:1, whilst our normally aspirated
engines with true flat top pistons have a compression ratio
of approximately 10.5:1. All our engines are fitted with deeper
valve cut-outs in case of over revving, also allowing the use of after market camshafts.
We can also build these engines with bushed little ends thus allowing
'fully floating' piston fitments, with pin retention by circlips.
Please note that we don't sell piston kits alone. These pistons are
specific to each custom engine build we undertake.
cosworth 24v plenum, BOA or BOB available. BOB throttle body manifolds also available.
Performance developed this plenum assembly for 'blown'
or n/a applications. It can be supplied ready to accept stock plenum
fitments and bolts on in the original position. We can offer a twin throttle body version. Air can now flow freely
into the engine via the stock throttle body assembly as there are no
internal restrictions. We provide threaded holes for you to mount a
throttle cable bracket. The internal volume can be reduced with packers
if required. The base plate can be purchased separately and used as an
adaptor to mount the BOB runner assembly or even a supercharger such as
Height is the same as stock and the throttle can be mounted
vertically or tipped forwards. Trumpets can be fitted if required.
Cosmetically it should be painted or coated but we supply it 'as is' unless asked.
Your logo can also be added to the lid.
£500 - £550 depending on fitments
24v Shortened Cosworth Bronze Aluminium Valve Guides
For turbo or high performance road/race engines engines we produce shortened bronze silicon exhaust valve guides. They transfer excess heat from the hot
exhaust valve to the head. These require reaming in situ for final valve
to guide clearance. We can do this for you if you like.
PRICE: £10 each or £20 installed
V6 Integral Girdle
Gen 2 Turbo Piston
Our forged, Gen 2 low compression, high strength turbo pistons feature
a turbo specific ductile ring pack, stronger yet lighter wrist pins,
deeper valve cut-outs and they also feature a performance enhancing
tighter 'squish' clearance. These pistons are designed specifically for
'boosted' applications and bespoke engine builds.
We have successfully developed a precision CNC machined
billet aluminium sump girdle which is integral to the sump.
This is for high rpm/ high torque engines. It's function is to tie
'ALL' of the the main bearing caps to eachother, the sump and engine block.
This prevents cap shuffling and fretting because
every cap is properly supported and held captive.
The girdle unites, stabilizes and braces the main bearing caps as well as the engine block.
This is a bespoke item, machined to suit each engine we build.
The picture shows a modded girdled sump with turbo drain tubes
for a tarmac race car.
PRICE: £800 (includes fitting kit).
have also developed a more affordable, heat treated 'cast' alternative to the
above billet machined item which is suitable for 4wd as well as 2wd
high revving road engines or forced induction.
PRICE: £600 2WD, £700 4WD (includes fitting kit).
may be offerred on an exchange basis for DIY fitment. We need your sump
to do this and some fettling may be required by you for final fitment.
Cosworth 24v BOA Cam cover gaskets.
We've developed a 'race proven' solution to those tired leaking O/E 'factory' gaskets. We produce gaskets that are easier to fit then other brands on the
market and ours work. Our design copies the race proven FBE race engine gaskets. Our gaskets are wider then the original items and are completely
flat which is how we get a better seal. We supply 4 hard resin inserts
to seal the front of the heads and the gaskets lay over the top. No leaking,
squishy bungs here.
£65 including UK postage
24v BOA-BOB Timing cover gaskets in stock!
We recently started producing these ourselves from new tooling as
they're no longer available from Ford. If you mistakenly use a BOB
gasket on a BOA block you could end up with an open oil gallery and
wreck your engine on startup! Buy the right gasket for the job.
£10 including UK postage
24v BOA/BOB. Engine inspection or rebuild service.
We will dismantle your engine and remove the crankshaft and internal
parts. After inspection for damage or wear we advise on a course of
repair or improvement. We repair and rebuild stock engines as well as
building custom engines and we also carry out some mechanical repairs
£180. Rebuilds from £700.
Cosworth 24v, BOA-BOB Timing Chains!
We offer O/E chains for either engine as well as a budget option.
£350 O/E including UK postage. Budget, £200.
New BOA tensioner blades and sleeves available. POA
Cosworth 24v, BOA-BOB Head stud kits!
We order these studs, manufactured to our specifications using high
strength 12.9 grade steel. These allow
superior head clamping and are reusable. These are for any
high performance engine build. The ARP nuts are also 12.9 grade.
£300 including UK postage
24v BOA/BOB Piston ring sets now available.
We have sourced an aftermarket high performance ring pack that fits the 24v
engine. This is a custom made ring pack. These are for standard bore engines.