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Discussion Starter · #1 ·
Hey how goes it with ye all.. got a good question for som1 out there in the know!! i have a 4afe sr corolla 1.6.. soon it will have a blacktop motor fitted im saving/sourcing for parts at the moment.. but currently im wondering is the an interchangeable camshaft for my 4afe from other a series motors, maybe a 5/7afe.. ive trolled the web for specs on each engines camshaft and cant find any and got frustrated and came here!! lol !! . what im saying is if there was a cam from either motors that would fit into my 4a that had more lift and duration and was worth doing i would. surely there must be a difference in profiles between them and lift also.. please people if ye know let me know. IF there is a better cam between them i will fit it.. as im bored and i want to get the spanners goin some before i do the blacktop swap.. also IF there is a better cam i will stick a 7afe head gasket on to raise comp. maybe a head skim and a little home polish job nothing deep just a cleanup.. all in all in my mind if all three were done - cam,thinner gasket and MINOR head work its got to add up to a few more ponies.. BUT unless i can be 100% certain on the camshaft scenario im not putting a spanner near it till it swap time.. OR if som1 can reply and give me exact lift and duration of all three engines camshafts i.e - the 4a/5a and 7a i will come to a conclusion of my own. maybe a lot to ask for but fence sitters get nowhere. thanks if youv'e read this and muchos gracias if you can answer.
 

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I would assume the a-series is similar to the e-series...4e-fe, 4e-fte and 5e-fe all have the same cams, only the 4e-fhe (higher sompression has different cams...

with that I mean to say I assume the 4a-fe 5a-fe and 7a-fe all probably have similar cams, and the ST or BT 4a-GE have higher lift cams, as the 20V is higher compression and power than the other 3 engines...
 

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Brit, in Bitz!
Carina2 1991
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224 Posts
Holy Thread Resurrection, Batman!!

Hi... Just popped over from Corona section [Carina II, Europe only]

Further to the above = the 4A-F is 6MM lift and 4A-FE is 7MM lift.

Timings and duration are slightly different :-

4AFE

1st GEN
Overlap: 9.00 degrees
Intake Duration: 220.00 degrees
Exhaust Duration: 220.00 degrees
Intake Installed Centerline of 104.00 degrees ATDC.
Exhaust Installed Centerline of 107.00 degrees BTDC.
6.6MM lift in/ex
30mm int diameter 24.5mm ex dia
the amount of ²cm**of air coming in through the intake valve is 12.440696 ²cm

2nd GEN
Overlap: 8.00 degrees
Intake Duration: 224.00 degrees
Exhaust Duration: 224.00 degrees
Intake Installed Centerline of 106.00 degrees ATDC.
Exhaust Installed Centerline of 110.00 degrees BTDC.
7.6MM lift in/ex
the amount of ²cm**of air coming in through the intake valve is 14.803172 ²cm

ALSO >>
7AFE cams will swap into 93+ 4AFE heads because it is the same head. The 7afe is just a 4afe with 200cc more displacement due to a larger stroke, the pistons are the same bore.

Anyone on a Carbbie 4A-F considered fitting 'breaker parts' from a 2nd gen injection engine for [at a guess] some slight benefit ??

I have reviewed the majority of responses [power upgrade on a 4A-F or FE] and know 4A-GE is the default advice ... Ah Soh! :nerd:

2sav
 

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Registered
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164 Posts
Holy Thread Resurrection, Batman!!

Hi... Just popped over from Corona section [Carina II, Europe only]

Further to the above = the 4A-F is 6MM lift and 4A-FE is 7MM lift.

Timings and duration are slightly different :-

4AFE

1st GEN
Overlap: 9.00 degrees
Intake Duration: 220.00 degrees
Exhaust Duration: 220.00 degrees
Intake Installed Centerline of 104.00 degrees ATDC.
Exhaust Installed Centerline of 107.00 degrees BTDC.
6.6MM lift in/ex
30mm int diameter 24.5mm ex dia
the amount of ²cm**of air coming in through the intake valve is 12.440696 ²cm

2nd GEN
Overlap: 8.00 degrees
Intake Duration: 224.00 degrees
Exhaust Duration: 224.00 degrees
Intake Installed Centerline of 106.00 degrees ATDC.
Exhaust Installed Centerline of 110.00 degrees BTDC.
7.6MM lift in/ex
the amount of ²cm**of air coming in through the intake valve is 14.803172 ²cm

ALSO >>
7AFE cams will swap into 93+ 4AFE heads because it is the same head. The 7afe is just a 4afe with 200cc more displacement due to a larger stroke, the pistons are the same bore.

Anyone on a Carbbie 4A-F considered fitting 'breaker parts' from a 2nd gen injection engine for [at a guess] some slight benefit ??

I have reviewed the majority of responses [power upgrade on a 4A-F or FE] and know 4A-GE is the default advice ... Ah Soh! <img src="http://www.toyotanation.com/forum/images/ToyotaNation_2014/smilies/tango_face_glasses.png" border="0" alt="" title="Nerd" class="inlineimg" />

2sav
Glad you resurrected the thread right before I found it haha. I want to fit better cams on a budget into my 4af carbie. I'm wondering if the stock 2nd gen cams from a 4afe will fit? Found some at a JY cheap and I'm debating. Soon I'll be doing some exhaust mods and hopefully dual webers just trying to get this thing to breathe easier but would like to first experiment w/ cams
 

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not sure if 4AFE cam set even matches the journal bearing mounts of the 4AF BUT I know the 4AFE cams also have that fuel pump cam even though it is EFI.... so maybe?

You can try if those cams are $10 to $50 cheap.... not sure if it also affects the valve clearance as well.... you might need to install those cams AND take feeler gauge measurements to be sure the cam lobes clear the lifters.
 

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Brit, in Bitz!
Carina2 1991
Joined
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224 Posts
not sure if 4AFE cam set even matches the journal bearing mounts of the 4AF BUT I know the 4AFE cams also have that fuel pump cam even though it is EFI.... so maybe?

You can try if those cams are $10 to $50 cheap.... not sure if it also affects the valve clearance as well.... you might need to install those cams AND take feeler gauge measurements to be sure the cam lobes clear the lifters.
.... Hi, all :nerd:

If you get a look at EFi cams you will see the fuelpump eccentric on the casting >> it isn't finish ground (for running on the pump arm) so some belt sander action would be needed :surprise:

2sav
 

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Senior TN Member
Porsche
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7,505 Posts
Doing swap with factory cam typically results in such mild improvements due to similar specs, that it's not worth effort. Cams really should be customised and done last to tie together all other upgrades: big-bore high-comp pistons, oversized valves, radiused seats, ported intake & exhaust, free-flow intake & exhaust. Then cam would really make difference. Such as some of these:

http://www.catcams.com/engines/engine-selection.aspx?SelectedManufacturer=26

Although you can get all those head mods by going to 2nd-gen 4A-FE head which flows so much better than previous generations. And wider bucket allows you to run more lift on cam lobe.
 
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