Plenum Water Jacket
Plenum Water Jacket
Author
Discussion

TVRCHIM400

Original Poster:

36 posts

39 months

Tuesday 28th February 2023
quotequote all
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

mk1fan

10,779 posts

241 months

Tuesday 28th February 2023
quotequote all
Not required in the UK climate.

You cannremove the plate too if you get some replacement - ie shorter - imperial bolts.

Or get them welded up as part of the enlarged butterfly mod. Plus a plenum spacer. Plus shorten the trumpets.

Wow, lots to do there then biglaugh

TVRCHIM400

Original Poster:

36 posts

39 months

Tuesday 28th February 2023
quotequote all
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.

mk1fan

10,779 posts

241 months

Tuesday 28th February 2023
quotequote all
May as well add a plenum spacer too.

https://www.ebay.co.uk/itm/194002419080

TVRCHIM400

Original Poster:

36 posts

39 months

Tuesday 28th February 2023
quotequote all
Mmm, I ve seen people post of issues with the plenum hitting the bonnet after the spacer has been fittied, so I ve not opted for it

macdeb

8,668 posts

271 months

Wednesday 1st March 2023
quotequote all
Tried plenum spacer, took it off and threw in bin, waste of money gimmick imho.

Classic Chim

12,424 posts

165 months

Thursday 2nd March 2023
quotequote all
hehe
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 scratchchin



Belle427

10,784 posts

249 months

Thursday 2nd March 2023
quotequote all
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.

blitzracing

6,415 posts

236 months

Thursday 2nd March 2023
quotequote all
Is the Tornado a new acquisition? It would be interesting to have a look at the Software revision of the ECU micro code as the versions I've seen so far are donkeys years old and there were some major updates as the 14CUX was coming to the end of its life that were not incorporated.

TVRCHIM400

Original Poster:

36 posts

39 months

Thursday 2nd March 2023
quotequote all
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

Classic Chim

12,424 posts

165 months

Thursday 2nd March 2023
quotequote all
Joolz from kits and classics and Emerald ecu installs into Tvr and maybe one or two others can re map the CUX.
Joolz is the man to talk too smile


blitzracing

6,415 posts

236 months

Friday 3rd March 2023
quotequote all
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/