RichHH Posted January 15, 2022 Share Posted January 15, 2022 Hi All, picked up a new Caterham recently... As I thought might be the case the race focused 2l Zetec engine has a pretty aggressive cam and am now thinking ahead to potentially changing to more compliant cams for driveability/mostly road use... The car currently runs around 220hp, so am not too bothered about losing a few horses in exchange for better road manners.... Has anyone (more technical than me) done something similar? Any ideas how much hp would be lost? Any other thoughts/ tips, including what options might be out there, or even if just a re-map might help. Thanks all. Link to comment Share on other sites More sharing options...
Wrightpayne Posted January 15, 2022 Share Posted January 15, 2022 Do you know the spec / reference of the cams installed? May help with choice of replacements. Link to comment Share on other sites More sharing options...
Grant_7 Posted January 15, 2022 Share Posted January 15, 2022 Need to know more about the specification, but...I had my car remapped by Northampton Motorsport and it transformed the day-to-day driveability. Link to comment Share on other sites More sharing options...
RichHH Posted January 15, 2022 Author Share Posted January 15, 2022 Thanks... I have a lot of paperwork for the engine, but not much for the cams specifically... It's a Dunnell 217bhp CV engine. Cams are described as ZRV, but struggling to find out any more about them. May have to contact Dunnell. Link to comment Share on other sites More sharing options...
7 wonders of the world Posted January 15, 2022 Share Posted January 15, 2022 are you on carbs or TB's..... what ECU too.If correctly mapped with TB's and Wasted spark ignition you can make wild cams perfectly driveable and keep the stable full for when you can enjoy them.Bear in mind if you swap the cams yo will need a rolling road session anyway. Link to comment Share on other sites More sharing options...
RichHH Posted January 15, 2022 Author Share Posted January 15, 2022 Hi, thanks....is on throttle bodies, not carbs and a Pro-Line 3d ECU. Link to comment Share on other sites More sharing options...
7 wonders of the world Posted January 15, 2022 Share Posted January 15, 2022 I'd look at the mapping first then Having have a K series on race cams and current Duratec on long duration cams both can be mapped to be docile and well mannered, there should be none of the old 'off cam ' rough running you had to endure on old X/flow's on carbs and a dizzy. Link to comment Share on other sites More sharing options...
SM25T Posted January 16, 2022 Share Posted January 16, 2022 Mapping is the way forward. Beats filing down those cam lobes;-) Link to comment Share on other sites More sharing options...
oilyhands Posted January 16, 2022 Share Posted January 16, 2022 I would also look carefully at the cam timing as this can have a profound effect on the way an engine delivers its power. Oily Link to comment Share on other sites More sharing options...
nic.day Posted January 16, 2022 Share Posted January 16, 2022 Go talk to Tony at Northampton motorsports. He will sort it. Link to comment Share on other sites More sharing options...
RichHH Posted January 18, 2022 Author Share Posted January 18, 2022 Thanks all for your responses... I now need to work out how to go about 'opening up' the ECU for a re-map.... It's an older AAE unit circa 2000 ish, I believe supplied by Dunnell (with the engine). From reading around the web, these generally seem to have been 'locked' (by Dunnells). I'll have cam timing investigated too (thanks Oily). Link to comment Share on other sites More sharing options...
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