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Cosworth Duratec Caterham


Mad Hatter

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For those interested the engine specs are -

 

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

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Oh my!!! That makes my 1300cc xflow Locost look depressing. Russ

Have to agree with the statement above as it also makes my homebuilt 7 look very depressing but I still like both of them, mine and his Cosworth Duratec Caterham. I have not seen to many Caterhams painted those colors and it looks good, only drawback I can see would be it would take even longer to get fuel as people would be all over it even more when stop anywhere.....Nice ride.....

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Welcome to USA7s. Your blatchat posts inspired me. Love the Sadev sequential. Have you thought about the Geartronics paddle shift kit?

 

Karl

 

 

Now I know who was the evil influence on buying your Sadev gearbox and going one up on me! :D

 

 

 

 

Lovely car Mad Hatter! I read your post on Blatchat with the build of this. Absolutely bonkers but inspiring! In your Cadfest video - how did you mount your GoPro on the front A arms?

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Karl - thanks for the welcome, i have the Geartronics flat shifter fitted, something nice and involving about using the stick

 

Twobone - we were hitting 140+ mph, those deristricted roads are amazing

 

Croc - Thank you, its funny i was inspired by K2 RUM there is always a special being created in someones garage.Everytime we meet up there are never two cars the same.The GoPro was mounted with the best clamp in the business a Superclamp with a ball & socket. Send me an email if you want more details

 

Terry - The exhaust was built to do it's job and needed 2" primaries and a 3" collector so it had to come straight out, after all why restrict it. It does polish up but i prefer the rainbow colour of the stainless steel. Sounds great

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