4afe to 4age - Toyota Nation Forum : Toyota Car and Truck Forums

1992corolla · 05-15-2005, 02:10 AM

I got a 4afe in my car right now and i got a 4age that my friend gave me cause he said it ran out of oil and wouldn't start up again. I took it all apart and the cylinder walls are all scratched up, same with the crankshaft, one of the pistons is bad, and ect. But the head of the engine is still fine. So my question is could i take the head of the 4age and put it in my 4afe and actually gain some results from it? Like i asked a shop and went to napa and asked them if theres a difference between the head gaskets on both engine and they told me that they both use the excact same head gasket. And the shop told me that it would bolt right on. But i don't want to do all that work if i'm not gonna gain anything out of it. If someone could please reply that has done this before or knows it'll work for sure. Thanks

Dr Tweak · 05-15-2005, 02:50 AM

Yeap, it would work. Except that you have the weaker lower end of the 4AFE. You might as well just swap over a complete 4AGE.

toyotaspeed90 · 05-15-2005, 03:25 AM

you will gain.... however, the compression won't be raised.... if anything it might be lowered.... you should definately find some 4ag pistons.... with a 4afe block you would have to use an early 4ag (pre 88) set....... some of the sensors are different, though....

Dr Tweak · 05-15-2005, 03:26 AM

That's right, I forgot about that. The compression will be really low, like 7.5:1 or something...

toyotaspeed90 · 05-15-2005, 03:30 AM

this should give you some insight to a 4afe to 4age complete swap...... would be similar even with a 4afe block

VooDoo · 05-15-2005, 11:25 AM

Quote:

Originally Posted by Dr Tweak

That's right, I forgot about that. The compression will be really low, like 7.5:1 or something...

turbo!!!

toyotaspeed90 · 05-15-2005, 12:01 PM

http://www.cardomain.com/memberpage/219038/9

forgot the link

Flashmn · 05-15-2005, 02:29 PM

Compression would be around the same as a GZE.... however you wouldnt have the advantage of the forged pistons.. but it would run on boost still.... VooDoo yes definately

1992corolla · 05-15-2005, 07:50 PM

well i got the 4age wiring harness and the ecu too and i can always get the heads lowered

1992corolla · 05-16-2005, 10:22 AM

and would i actually get any gains from it, as in would i be able to feel it

toyotaspeed90 · 05-16-2005, 11:19 AM

find a 4ag block and you will.........

1992corolla · 05-16-2005, 08:53 PM

so its not like a b16 that you can slap a b18 and it makes a big difference?

Kwanza · 05-16-2005, 09:59 PM

Quote:

Originally Posted by 1992corolla

so its not like a b16 that you can slap a b18 and it makes a big difference?

No. Even with an LSVTEC build up (B16 or GSR VTEC head on B18A/B "LS" block), the pistons will need to be, or should be changed otherwise compression will suffer. Not as dramatic as a 4AF/4AG head swap, but it'll have less compression.

1992corolla · 05-16-2005, 11:16 PM

yeah but it still makes a noticeable difference, thats what i'm trying to ask with the 4afe block and 4age head, if it'll make a noticeable difference

Dr Tweak · 05-16-2005, 11:18 PM

Yes, it will make a noticable difference.