2ga and 2gb head differences

[djester55]

i was wondering what my option were for putting a 99 gst head on my 95 gsx. i know the cam sensirs are in different places.

 

[Syndicate13]

There are no differences other than the placement of the cam sensor. You will want to use your cam sensor since you have a 95 ECU. It is a direct swap over.

 

[ddavisaf]

The 95-96 CAS is a POS...
Look into swapping over to a 1G CAS. I'd give you links, but they're at work.

 

[Syndicate13]

The 95-96 CAS is a POS...
Look into swapping over to a 1G CAS. I'd give you links, but they're at work.

And where are your facts to back up this claim? It serves the same purpose as the later style 2G CAS, the only advantage the 1G CAS has is adjustable timing. That in the wrong hands can be a recipe for disaster.

 

[ddavisaf]

The 95-96 CAS that mounts on the under side of the intake cam is easily broke. The clearance between the sensor and the fin is very tight and if it is install incorrectly or there's a bent fin (which can't always be seen be the naked eye) it will thrash the CAS.
Granted the 1G CAS in the wrong hands has the makings for disaster as well, it will still be better than the 95-96 CAS in my opinion. The later 2G CAS would be an improvement also in my eyes.
This is simply what I have seen for myself while working on these cars.

 

[Syndicate13]

The 95-96 CAS that mounts on the under side of the intake cam is easily broke. The clearance between the sensor and the fin is very tight and if it is install incorrectly or there's a bent fin (which can't always be seen be the naked eye) it will thrash the CAS.
Granted the 1G CAS in the wrong hands has the makings for disaster as well, it will still be better than the 95-96 CAS in my opinion. The later 2G CAS would be an improvement also in my eyes.
This is simply what I have seen for myself while working on these cars.

Good point. However, in a properly assembled and functioning timing assembly, there will be no problems. The 1G and later style CAS signals are 180 degrees out for the 95 ECU, some people say it makes no difference, some say their car idles like crap and sometimes has a weird stumbling problem, mine included.

 

[InvaderGSX]

The 95-96 CAS is a piece of crap design and when it goes bad it is a whore to change. But yes the 1G CAS is really pointless to swap over to unless you are putting in a 6 bolt block. It's a pain to get it running right without misfire's. If your not going a 6 bolt I recommend going to the 97-99 style CAS. These bad boys never go out and you can use it no problem with a 95 ECU. Just swap the plug wires from where 1 and 4 go to 2 and 3. Very simple. That is the only difference. I have used all 3 CAS's. On my automatic 2G where I have a 7 bolt I use the 97-99 CAS and it's a 95.

 

[Syndicate13]

The 95-96 CAS is a piece of crap design and when it goes bad it is a whore to change. But yes the 1G CAS is really pointless to swap over to unless you are putting in a 6 bolt block. It's a pain to get it running right without misfire's. If your not going a 6 bolt I recommend going to the 97-99 style CAS. These bad boys never go out and you can use it no problem with a 95 ECU. Just swap the plug wires from where 1 and 4 go to 2 and 3. Very simple. That is the only difference. I have used all 3 CAS's. On my automatic 2G where I have a 7 bolt I use the 97-99 CAS and it's a 95.

The only reason 6 bolt swaps RM is because you are relying on one sensor to drive two signals. The signal of the 97-99 sensors is still 180 degrees opposite from what the 95-96 ECU expects, which can lead to some drivability problems.

 

[InvaderGSX]

It does not lead to driveability issues when you swap the plug wires. I've done it on over 3 cars, you can read about it all over the forums. People do it all the time with no issues. You swap it either from the coil pack or just on the spark plug wires themselves. Where 1 and 4 is supposed to go you put 2 and 3. Very simple. That fixes your 180 degree problem. If what I was saying is not true then why do so many people with 97-99 DSMs have 95 EEPROM ECU's running DSMlink and TMO style chips? Also I personally have dropped in 97 ECU's into 95's totally stock just swapping the plug wires and works with no problems. You can verify my info on this forum, on RRE's website, Magnus website, and the DSMlink forums............

 

[Pj97GST]

Concur.. The reason that you are switching the plug wires is to match the firing order of the injectors.

I have a socketed eprom ecu with a Keydiver stage III chip in my 97 which also has a 1G CAS. He includes the CAS inversion as part of the package, so you just switch the plug wires and you're good to go.

I'm actually getting ready to swap my 97 CAS back in since it provides much more stable timing with the Keydiver chip.

 

[Syndicate13]

Concur.. The reason that you are switching the plug wires is to match the firing order of the injectors.

I have a socketed eprom ecu with a Keydiver stage III chip in my 97 which also has a 1G CAS. He includes the CAS inversion as part of the package, so you just switch the plug wires and you're good to go.

I'm actually getting ready to swap my 97 CAS back in since it provides much more stable timing with the Keydiver chip.

Your key here is that he inverts the CAS signal, which was my argument from the get go. DSMlink also does this. I have a 95 car with a 95 ECU, plug wires swapped because of the 6 bolt swap and without Invert CAS checked my car idles like crap. Your mileage may vary.

 

[babyviper]

What if you swapped a 97 head in a 95 with a 97 ECU do you have to modify the harness? Reason is, I'm buyin a 95 shell with no ecu or motor and i have a wrecked 97.

 

[InvaderGSX]

The only difference is a 95 has the CAS in the cam gear and the 97 has the CAS mounted on the passenger side of the head. Both heads are identically the same. If you put in a 97 ECU with a 97 CAS into a 95 you will still need to wire in the 97 CAS because the harness is different. It's very simple to do. It is only 3 wires.

 

[exiletalon]

What if you swapped a 97 head in a 95 with a 97 ECU do you have to modify the harness? Reason is, I'm buyin a 95 shell with no ecu or motor and i have a wrecked 97.

I recently swapped the entire 97' motor into my 95' after an engine blow. My 95' wiring harness plugged right into my 97' CAS- All I had to do was swap the plugs!-

 

[babyviper]

I recently swapped the entire 97' motor into my 95' after an engine blow. My 95' wiring harness plugged right into my 97' CAS- All I had to do was swap the plugs!-

Thanks, I thought I had to go out and buy an ecu+ or a dsmlink even though I will eventually need i don't have the money to spend on it now.