| Mod |
Benefit |
Drawback |
Is it a problem? |
Notes |
| |
| Wash out IC with petrol |
- Clean out the internal crap/oil within the IC
- IC more efficient
- Reduced intake temps
- More power
- Less chance of detonation
|
- Need to ditch old oily petrol
- Need to buy some more
Toyota coolant - expensive!
|
No |
As you've got the IC off, you might as well insulate it! |
| Insulate IC |
- IC more efficient
- Reduced intake temps
- More power
- Less chance of detonation
|
- Need to buy some heat reflective
tape and/or insulating mating
|
No |
The IC sat unshielded on top of engine and exhaust manifold, and therefore suffers from heat soak - reducing the IC efficiency |
| Exhaust manifold heat shield |
- IC more efficient
- Reduced intake temps
- More power
- Less chance of detonation
|
|
No |
The area directly beneath the IC is unshielded and the very hot exhaust manifold is exposed... |
Upgrade front IC radiator
Picture |
- Improve IC efficiency and lower intake temperatures
- IC more efficient
- Reduced intake temps
- More power
- Less chance of detonation
|
- Need to
remove aircon
- Need to buy and probably modify a water radiator and then mount it
- £
|
Yes, need to ditch aircon |
A Metro turbo radiator is a good choice Serck Part No 2019047 |
Constantly running IC pump
How to article |
- To ensure IC operates at maximum efficiency
- IC more efficient
- Reduced intake temps
- More power
- Less chance of detonation
|
- Increased wear on IC pump
|
No |
18 months of constantly running and no problem with reliability... |
| Heat deflector plate |
- IC more efficient
- Reduced intake temps
- More power
- Less chance of detonation
|
- Need to fabricate aluminium plate
|
ish - requires measuring and fabrication |
Factory provided exhaust manifold insulation is not very good and tends to heat the IC |
Water Injection
How to...
What is... |
- Reduce intake temperatures dramatically
- Help prevent detonation
- More power
- Less chance of detonation
- Helps to clean valves etc
|
- ~£300
- May need to drill inlet manifold or throttle body to mount sensors
|
ish - fitting and wiring of components |
An excellent way to cool the intake air temperatures You can also use the system to help raise the octane rating by adding Methanol to the water |
| Remove Throttle Body coolant pipes (should be heater pipes!) |
- Reduce intake temperatures
- More power
- Less chance of detonation
- Less engine complexity
- More room in engine bay
|
- Emissions may rise (doubtful)
|
ish |
Access is awkward and you need to identify the correct pipes! |
Remove under bonnet insulation
Picture |
- Reduce under bonnet temperatures
- Cooler engine bay
- More power
|
- Require heat deflector tape under bonnet, above the turbo/cat to protect paintwork
- Remove and dispose of carefully - may contain asbestos
- Engine noisier - especially if you have a dump valve installed
|
ish
|
Make sure you protect the paintwork directly above the turbo/cat! |
| Remove firewall bonnet sealing strip |
- Reduce under bonnet temperatures
- Provide a high level exit for engine bay heat
- Cooler running engine bay
|
- Smells may enter the cabin from engine bay, especially if you have any exhaust, fuel or oil leaks!
|
ish |
Noxious leaks can be harmful |
| Remove cam belt top cover |
- To reduce the temperature within the cambelt area
- Prolong cambelt life
- Allow better "air cooling" to No 1 cylinder area
- Can instantly see the condition of the cambelt
|
- Awkward to remove
- Exposed rotating parts - dangerous
- Wires may get caught in the rotating sprockets
|
ish |
Cable tie all the wires out of the way, be very careful when working in the engine bay when the engine is running Adding cambelt area cooling was a later modification to the 185CS/RC and 205 GT4s |
| |
