A Few Questions About 4age

[Johno]

I am changing my motor from 4ac to 4age. I have bought the motor and I'm currently painting the car. While the engine is out I want to do a bit of work to it.

I have decided to keep the 4ac gearbox because its in better condition than the 4ages one. I am getting a Exedy HD Clutch but i need a new throw out bearing. Are they expensive?

 

The Water pump needs to be replaced, it that an easy job?

 

The 4age is slightly worked, the head was reco'd about 40,000 km ago and has been ported, grinded and polished. With a cold air intake system, how many Kw do you think i would get at the wheels?

 

I was thinking of getting bigger cams but running the stock ECU. Is this possible?

 

Thanks in advance, Johno :dance:

[Trev]

I am changing my motor from 4ac to 4age. I have bought the motor and I'm currently painting the car. While the engine is out I want to do a bit of work to it.

I have decided to keep the 4ac gearbox because its in better condition than the 4ages one. I am getting a Exedy HD Clutch but i need a new throw out bearing. Are they expensive?

 

No.

 

The Water pump needs to be replaced, it that an easy job?

 

Do it before you put the motor in, Save yourself alot of hassle if you have never done one.

 

The 4age is slightly worked, the head was reco'd about 40,000 km ago and has been ported, grinded and polished. With a cold air intake system, how many Kw do you think i would get at the wheels?

 

Only a dyno could tell you that but 75 - 80 kw's.

 

I was thinking of getting bigger cams but running the stock ECU. Is this possible?

 

Thanks in advance, Johno :dance:

 

Yes, If you look at a cam manufacturers specifications it will tell you what is needed but don't go over a 256 degree.

[Johno]

Thanks heaps for that Trev! :dance:

Someone was telling me if i get bigger cams i will have to change the underbucket shims, WTF are they? and do i need to?

[Trev]

Thanks heaps for that Trev! :dance:

Someone was telling me if i get bigger cams i will have to change the underbucket shims, WTF are they? and do i need to?

 

If you go for something like a 272 you will have to get a different ecu and change the bucket/shim setup.

 

It goes Cam Shaft> Shim> Bucket> Valve.

[Johno]

So by going 256 deg cams I don't have to change anything like the valves or shims?

[Trev]

So by going 256 deg cams I don't have to change anything like the valves or shims?

 

No, Well I have not seen anyone having too.

[Johno]

Thanks for the info trev :dance: