John Sleath Race Cars

John Sleath Race Cars Classic and modern tuning and remapping specialist. Carburetor to EFI Rolling road and Tuning services

NOW SOLD.I've got this engine for sale right now, Fully rebuilt 450hp LS2, just been dynoed to brake the rings in and po...
08/09/2025

NOW SOLD.

I've got this engine for sale right now, Fully rebuilt 450hp LS2, just been dynoed to brake the rings in and power test. New pistons and rings, Gen 4 rods, crankshaft balanced and fitted with 60-2 trigger wheel the same as the LS3 runs, camshaft to my spec to pass IVA emissions, new LS7 lifters, new springs and pushrods, new Corvette balancer to give max radiator clearance,low profile new F body oil pan, comes with all in the photos, coil packs,ect, £4800.00. Can supply complete Canems engine management at extra cost.

Safe to say this is one of the most famous home built cars in the UK, Charlie's 27 litre Rolls-Royce Meteor powered Rove...
06/08/2025

Safe to say this is one of the most famous home built cars in the UK, Charlie's 27 litre Rolls-Royce Meteor powered Rover SD1 was back after another big upgrade to his supercharger, power was up, boost was up, the transmission lost 2nd gear, so we will be regrouping very soon.

Having a clear out of current stock,4l80E full build.Extreme automatics full manual billet PR1234 shift valve body.Setup...
28/07/2025

Having a clear out of current stock,
4l80E full build.
Extreme automatics full manual billet PR1234 shift valve body.
Setup with engine braking options
Sonnax roller billet hub.
Roller thrust
£2950+vat
or with pro release transbrake option install add £250.00
can also supply with a 4x4 output shaft option add £125.00

This past weekend saw the SantaPod/Melbourne Street Weekend https://santapod.co.uk/street-weekend.php, with very difficu...
16/06/2025

This past weekend saw the SantaPod/Melbourne Street Weekend https://santapod.co.uk/street-weekend.php, with very difficult weather and road conditions, proud to have been the tuning company of choice for the top 4 finishers.

FOR SALE, going to offer my Dax Quadra for sale to you guys first.Cosworth 4x4 running gear, around 350whp, just about e...
24/04/2025

FOR SALE, going to offer my Dax Quadra for sale to you guys first.
Cosworth 4x4 running gear, around 350whp, just about everything has been rebuilt or new, complete with full wet weather gear.
My plan was to do more track days, but work and other commitments got in the way.
Looking for around £22K ono.

Specs are
FuelTech FT600 engine management and data logging
With launch control and multi map power switching
BorgWarner EFR 7064 ball bearing water cooled turbocharger,
800cc injectors,
Custom stainless exhaust manifolds
Custom water injector kit
Transmission and chassis.
Rebuilt 4x4 cosworth 5 speed
Rebuilt transfer box
TTVR light weight steel fly wheel and alloy pressure plate, 5 paddle clutch
Custom made ProTech Shock.
Toyo Proxes R888 tyre
Full wet weather gear.

Tom from Bespoke-Auto-Engineering was in today for a pre-customer delivery setup and tune.
27/03/2025

Tom from Bespoke-Auto-Engineering was in today for a pre-customer delivery setup and tune.

Great to welcome Matt back for a workout after some winter upgrades, including camshaft and 500lb injectors, all control...
25/03/2025

Great to welcome Matt back for a workout after some winter upgrades, including camshaft and 500lb injectors, all controlled by its FT600 Fueltech.

20/03/2025

You all asked for it. I like to think I'm pretty laid back, but I'm looking quite tense in this video.

Just finishing off the 30 Chevy before putting it up for sale. Been on with this for some years, complete with a bunch o...
20/03/2025

Just finishing off the 30 Chevy before putting it up for sale. Been on with this for some years, complete with a bunch of safety upgrades, 9in axle 4.10 gears with a L*D, disc brakes all round, EFI AJ6 engine and 5 speed manual, looking for around 15K but totally open to offers.

The Rocket returns, Simon in for his yearly service and check over.
19/03/2025

The Rocket returns, Simon in for his yearly service and check over.

Made some noise today, combo of fault finding and tuning.BBC Blown Methanol whats not to love
19/03/2025

Made some noise today, combo of fault finding and tuning.
BBC Blown Methanol whats not to love

Address

Carr Grange Farm
Doncaster
DN122AQ

Opening Hours

Monday 8am - 4:30pm
Tuesday 8am - 4:30pm
Wednesday 8am - 4:30pm
Thursday 8am - 4:30pm
Friday 8am - 4:30pm

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