Since there is a good chance I can, down the line, acquire a 4A-FE powered AE92 for parts...

I was wondering if the 4A-FE head (thus allowing injection) bolt onto a 4A-FC block?

Has anyone done this and, if so, how did it go?

 

I also have no idea about compression ratios or interference/non-interference status on these engines ... that could be problem...

 

Anyway - let me know if anyone has done this or thinks it's possible. My theory is that it's a sound and good idea :)

Since there is a good chance I can, down the line, acquire a 4A-FE powered AE92 for parts...

I was wondering if the 4A-FE head (thus allowing injection) bolt onto a 4A-FC block?

Has anyone done this and, if so, how did it go?

 

I also have no idea about compression ratios or interference/non-interference status on these engines ... that could be problem...

 

Anyway - let me know if anyone has done this or thinks it's possible. My theory is that it's a sound and good idea :)

I ran a 4AFE head on a 4AFC Block, The 2 heads are identical except for a fuel pump cut out and injectors in inlet ports.

I've also ran a big port 4ag head on a 4afc block for a while.

The only differences - water pump, timing belt and pulleys, the manifolds and the flywheel...

 

And from memory the A-series range is all non-interference heads (Except the 20v)

And i was told that it wouldn't work cause of the 4af pistons would give the motor a "super" low compression. Still reckon the motor had the same power but better economy after i did it....

whoops i made a boo boo :D

Edited January 27, 200917 yr by MYSTIK

And from memory the A-series range is all non-interference heads (Except the 20v)

 

no quite right

 

is more like this "all A-series range in non-interference(including the 20v)" :D

I've also ran a big port 4ag head on a 4afc block for a while.

The only differences - water pump, timing belt and pulleys, the manifolds and the flywheel...

 

And from memory the A-series range is all non-interference heads (Except the 20v)

And i was told that it wouldn't work cause of the 4af pistons would give the motor a "super" low compression. Still reckon the motor had the same power but better economy after i did it....

 

Correct

excluding the 4A 4AC (as no valve cut outs on pistons)

 

no quite right

 

is more like this "all A-series range in non-interference(including the 20v)" :D

 

Wrong

quiet clearly 2 people in this post have ran other heads successfully.

Correct

excluding the 4A 4AC (as no valve cut outs on pistons)

 

 

 

Wrong

quiet clearly 2 people in this post have ran other heads successfully.

 

The 4a - 4ac are not interference either.

Don't forget very low boost friendly compression when you put a GE head on an FE bottom end.

 

I've also ran a big port 4ag head on a 4afc block for a while.

The only differences - water pump, timing belt and pulleys, the manifolds and the flywheel...

Wow - so pretty much any 4A head will work. Sweet :jamie:

Yes and no. Like you'd be wasting your time in fitting a 20v head to the 4a-f block. Where as the big port head wouldn't be so much of a waste of time.

 

All in all you'll be dealing with a crank that can only use a 6 bolt flywheel instead of an 8 bolt flywheel. Unless you swap in a 4ag crank, but then its a case of why bother.....

Yes and no. Like you'd be wasting your time in fitting a 20v head to the 4a-f block. Where as the big port head wouldn't be so much of a waste of time.

 

All in all you'll be dealing with a crank that can only use a 6 bolt flywheel instead of an 8 bolt flywheel. Unless you swap in a 4ag crank, but then its a case of why bother.....

 

Indeed!

 

The main idea here was to ascertain the possibility of running a 4AFE head on a 4AFE block - which seems to be the case.

I think using 4AGE heads would be a tad silly regardless though... don't they run a chain drive on those? (be stuffed if I can remember ...)

I think using 4AGE heads would be a tad silly regardless though... don't they run a chain drive on those? (be stuffed if I can remember ...)

 

No, all A-series engines are belt.....

hehe

 

You could be thinking of the t-series, r-series twincams

actually the ae86 ADM 4ac engines have 6 bolt flywheels soremoving the carb engine and droping in a 4af/age hybrid would bolt in prefectly leaving you with all the std gear but then again why bother

I ran a 4AFE head on a 4AFC Block, The 2 heads are identical except for a fuel pump cut out and injectors in inlet ports.

 

What did you have to do about the fuel pump cut out and injector inlet ports? I would like to keep the carby on the 4A-FC, so would the injector ports cause a problem?

Edited June 15, 200917 yr by kdrakon