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10-12-2001:

The intake cam on my ST185 is swapped for an ST205 intake cam. The ST185 cam does have 0.5 mm less lift than the ST205 one.

More info about 3S-GTE head details can be found at Richard Doig's site: http://gtfour.supras.org.nz//
05-09-2002:
At the moment I am investigating in adjustable gam gears, and a pair of HKS 264 degrees 9.2 mm lift in- and exhaust cams.
Current cams are: Intake 8.7 mm and 240 degrees.
Exhaust 8.2 mm and 236 degrees.


15-06-2004
Received the AEM adjustable cam gears today. Since the HKS 264 cams are already waiting on my desk, I will try to install this combo asap... :) :)
HKS Install sheet, in Englisch, is already online: HKS install sheet


Pic of the HKS 264 cams:

Close up of the HKS 264 cam, you can see "264" marked on it:

Pic of the AEM cam gears:

Pic of the AEM cam gears:

HKS install sheet

25-05-2005 Cam install

Cams are in the car now. It really is not difficult, but very time consuming.
This is a close-up of the AEM exhaust cam sprocket.
Another side view of the engine, while cam tuning.
This is a pic of the degree plate, needed to time the crank with the cams, according to the HKS specs.
The pointer is installed on the bolt from the oil pump.
Proof, 264 marked in the cam :-)
A pic of the engine with the measuring instrument, needed to see when maximum lift is achieved. And needed to check the real timing with 1 mm valvelift, according to the HKS install sheet. We found out that it is very difficult to achieve the exact specs, for maximum lift, and timing with 1mm lift. Remember, 1 cam degree is 2 degrees at the crank...
Finally we installed the cams like HKS is telling us, and we ended with:
Exhaust cam gear: 6.75 retarded.
Intake cam gear: 1.75 retarded.

Some other cam statistics:
Specs of HKS 264 are:
Ex, max cam lift 9.2 mm, 264, max lift at 103 BTDC, open 55 BBDC, close 29 ATDC
In, max cam lift 9.2 mm, 264, max lift at 110 ATDC, open 22 BTDC, close 62 ABDC
Overlap 51

Specs of stock ST185 cams:
Ex, max cam lift 8.2 mm, 236, max lift at 118 BTDC, open 56 BBDC, close 0
In, max cam lift 8.2 mm, 236, max lift at 110 ATDC, open 8 BTDC, close 48 ABDC
Overlap 8

Specs of stock ST205 cams:
Ex, max cam lift 8.2 mm, 236, max lift at 118 BTDC, open 56 BBDC, close 0
In, max cam lift 8.7 mm, 240, max lift at 113 ATDC, open 7 BTDC, close 53 ABDC
Overlap 7

Don't focus on overlap times, since intake closing point is the most important event!


HKS part nrs:
Exhaust 264 cam:
2202-RT064
13692-264274EX

Intake 264 cam:
2202-RT063
13692-264274IN


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