The YOB started off as a 2004 R300 Caterham 7
This had been converted to a 2.3 Duratec with mild cams and throttle bodies giving 256bhp
Not a bad start for your first 7 i can hear you thinking, but the upgrade bug got a grip and things started to get carried away

The first dyno run with a new GoodFab exhaust, before the BIG upgrade

• The only thin left from my last engine is the block, which has been rebored to 89mm
• Cosworth billet crank
• Cosworth steel I beam rods
• Supertech 89mm forged pistons
• Pace dry sump
• Cosworth H/Duty rod shells
• Cosworth H/duty mains
• ARP bolts through out
• Cosworth Pulley Wheels
• New high port cylinder head (Ultimate Performance phase 4 spec, this takes valve lift from 12.75mm to 14.5mm)
• Bore tappets out +2mm to 33mm
• Special spring platforms,bronze vavle guides
• 54mm Jenvey throttle bodies (they are just temporary)
• Raceline cam cover
• 300mm Laminova
• Radtec Extreme Radiator and 11" spall fan (black)
• GoodFabs exhaust system (2" primaries & 3" collector) straight out the bonnet
• Racelines new compact bell housing and clutch
• Sadev 6 speed sequential
• Flat Shifter
• H/duty prop
• Seven speed alloy diff bracing arms
• 22% steering rack
• R500 aero wishbones
• AP racing master cylinder
• Tillett B4 Carbon Seats
• Willans 3" six point harnesses
• 270mm D shaped Momo steering wheel
• Roadsport rollcage
• Carbon floor mats
• Lots of Samco & Mikalor
• Image Billet 60 Wheels
• Nitron NTR R1 Shocks
• Stack temp gauges for the engine and gearbox oil

plus more to follow

Click on the picture for the full sized image

Engine Build Spec -


Duratec Engine Build Specification – Job 603

Donor engine 2.3 Duratec c/w Pace dry sump

Work carried out/items fitted/build specifications:

1. Block bored to 89mm for 2339cc capacity
2. Cosworth 94mm steel crank new spigot bearing fitted
3. Stock main bearing shell set
4. ARP main bearing stud kit
5. Raceline reduced diameter flywheel to suit low-line sump/bell housing
6. ARP flywheel bolts
7. Carrillo I-beam connecting rods c/w ARP bolts
8. Vandervell VP2 big end bearing shells
9. Supertech 89mm forged pistons, valve pockets modified for Ultimate cams
10. 13:1 compression ratio
11. New High Port cylinder head upgraded to Phase 4+ specification and modified to accept Raceline water rail.
12. Oversize Kolbenschmidt hard inlet and exhaust valve seats fitted
13. Colsibro bronze valve guides fitted
14. Valve spring decks machined min-to-clean to accept larger spring seats
15. Tappet bores machined and burnished to 33.0mm diameter
16. Supertech 36.8mm inlet valves, 32.0mm exhaust valves
17. Ultimate special valve spring seats
18. Ultimate ultra high capacity valve spring set
19. Ultimate 33mm lightweight steel cam followers
20. Ultimate 10mm diameter 'biscuit' tappet shims
21. Ultimate profile cams 14.5mm x 304degree inlet, 13.3mm x 292degree ex.
22. Cam timing 100 degrees atdc inlet, 105 degrees btdc exhaust
23. Tappet clearances set at 0.2mm(0.008") inlet, 0.25mm (0.010") exhaust
24. Stock Duratec head gasket
25. ARP head stud kit
26. New cam chain and sprockets – crank sprocket slot machined for key
27. Modified cam chain tensioner
28. Cosworth small diameter crank pulley and trigger disk
29. ARP crank pulley bolt for Pace pump belt drive pulley
30. New water pump with Cosworth anodized aluminium drive pulley

Many Thanks goes to Simon Armstrong at Ultimate Performance for building a cracking engine
http://www.ultimatep.com
Incase you don't know Simon supplies Caterham Cars with the R500 Duratec cylinder heads, his work is first class.

Just add the Mad Hatter to the above and you get

I never knew that it had the AP master cylinder in it - happy to go out in it at Llandow now, personally I think that is the best upgrade.

Snakey

You should know me better Snakey

You asked about it and what you should an all..........

Or am I day dreaming about whether to have a brake balance valve fitted??????


Any roads I have decided that I will drive the Yob at Llandow so that you can have definitive answer about how good/excellent/mega the car is.

Snakey

Lets hope the new coil pack turns up in time