Under construction - not yet accurate...
Mod | Benefit | Drawback | Is it a problem? | Notes |
Replacement camshafts |
|
|
ish |
Too longer duration will need some careful setup to avoid a "lumpy" idle An aftermarket ECU is advisable to take advantage of this setup Popular durations are 264 and 272
Stock durations:
Stock lift: 205 cams will not fit the 165 head 205 cams will fit the 185 head |
Vernier cam pulleys |
|
|
ish |
Popular choice for HKS 264 seems to be: 4 deg advance intake 8 deg retard exhaust |
Forged pistons |
|
|
No |
205 fitted with Hypereutectic pistons, a "halfway house" between cast and forged pistons |
Metal head gasket |
|
|
No |
Popular opinion is that the HKS gasket seals very well TTE gasket is recommended for price/performance Commonly available in 1.0, 1.2 and 1.4mm widths Only fitted as standard on the 205 - 1.0mm. No other GT4 came with a MHG |
Shot peened rods |
|
|
ish |
The rods can be distorted by incorrect shot peening |
Nitride crank |
|
|
ish |
Needs to nitrided after all machining and polishing work has been completed or the "coating" will be removed Probably not required |
Knife edge crank |
|
|
No |
Only really talking about a few hp I think, but every little helps? |
ARP fasteners |
|
|
No |
ARP fasteners are available for: Head |