Plenum Water Jacket
Discussion
Hi All,
Just doing some work on the Chim and noticed that the water jacket pipes situated just underneath the inlet on the plenum are not connected. Is this a common theme or has someone removed them in the past.
If they should be connected where is the flow and return obtained from, and what benefit if any could be achieved by reinstating it.
Thanks
Just doing some work on the Chim and noticed that the water jacket pipes situated just underneath the inlet on the plenum are not connected. Is this a common theme or has someone removed them in the past.
If they should be connected where is the flow and return obtained from, and what benefit if any could be achieved by reinstating it.
Thanks

I think what Macs saying is unless you have very good 5.0 engine producing full power you won’t need a spacer and even at high revs it’s a minimal gain if any.
So if you live at 6000 revs in a 5.0 firstly good luck and secondly you might just notice a very small difference but frankly at that point you need the throttle body boring out from 65 to 72-75 mm to make any use of the incoming air.
These types of mods work at racing revs only.
For anything other than the 5.0 engine the standard plenum provides enough air.
Using shortened trumpets creates a lot more extra space inside plenum area than a spacer would.
Its a bit of a gimmick.
Some people say it removed shunting…. If it removes shunting we should all have one

TVRCHIM400 said:
Thanks, that's great.
ACT superflare kit is ordered to make the old girl breath a bit better, twinned with a Tornado chip I am hoping to see a difference in its response.
Think I’d have left the chip alone personally and looked at getting a mapping session after any mods you choose to do.ACT superflare kit is ordered to make the old girl breath a bit better, twinned with a Tornado chip I am hoping to see a difference in its response.
TVRCHIM400 said:
You may be able to tell me different Belle but from what I understand the 14CUX isn't the easiest to re code as the values can't be changed with Rover Gauge. Is there other software out there that you can change the fueling table
The 2 issues with mapping are you need an air fuel ratio meter to see what's going on, and a bit of hardware called a Moats Ostridge which plugs into the Eprom socket on the CUX and costs about £200. Its effectively a re writable USB device you can alter the fuel tables as much as you want with the software Tunerpro (free). Its worth running RoverGauge alongside Tunerpro so you can verify the map changes when you upload the new values. Once happy with the new map, a new Eprom needs to be programmed. http://www.remap-14cux.uk/
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