Fast Road Cam on a TR7

[Matt306]

Engine seems to be back together not leaking. Its also starts so win.

I fitted a Kent Cams TR7 fast road cam Search results for “DM1” - Kent Cams just wanted to know if anyone else has fitted one and what there experience at idle is.

Mine is quite lumpy just wondering if its down to running in or the adjusted timing.

 

[Nick Jones]

No TR7 experience, but looking at the numbers it shouldn’t be that lumpy. You have EFI on this IIRC?

It will need remapping (as I’m sure you are well aware) and if still running the old map it’ll probably want a bit more timing low down and a bit less fuel, and the opposite at the top end. With a single throttle body you may possibly be getting a little reversion at idle / low rpm + light throttle which may introduce a little lumpiness compared to standard, but as above I wouldn’t expect anything severe. 
 

[Matt306]

It's early days yet on it so still fiddling. Would you suggest more advance low down I am 10 btdc for idle on stock specs but a long way from that now in set up. 

Would you alter the idle from 850 as I have read some fast road cams like a bit faster idle

[Nick Jones]

850 not very low anyway. 
I used to have something like 17deg btdc when running single throttle, but now I’m on ITBs and more modern firmware I’m using the ignition-timing-based idle control so base is alot less but it’s got another 10 deg to play with.

Really, it wants what it wants so it’s a case of experimenting. Hopefully it doesn’t change its mind from dsy to day!

[Matt306]

I have the timing at 22 BTDC for idle it just dies, it will restart with some revs but dies when lifting off the accelerator.