Jump to content


Whats the Difference between a 7a-fe and a 4a-fe motor?


Recommended Posts


Whats the Difference between a 7a-fe and a 4a-fe motor?

4A is 1.6L, 7A is 1.8L

In depth:

4A-FE

1,587cc inline 4

81mm bore, 77mm stroke

16 valves, narrow angle OHC scissor-gear configuration (aka 2 camshafts but only one cam pulley)

Electronic fuel injection

Approx 77kw

7A-FE

1,762cc inline 4

81mm bore, 85.5mm stroke

16 valves, narrow angle OHC scissor-gear configuration

Electronic fuel injection

Approx 86kw

In essence, the 7AFE is a stroked 4AFE

Link to comment
Share on other sites

Guest dong-soo
Whats the Difference between a 7a-fe and a 4a-fe motor?

200cc

juzt put a 4age in :D

u will have a great time with a mildly tuned smallport... i know i do ^__^ ke ke.

Link to comment
Share on other sites


Guest dong-soo
Whats the Difference between a 7a-fe and a 4a-fe motor?

In essence, the 7AFE is a stroked 4AFE

i wonder what the redlines on both of these engines are ??

i wonder if the 7afe has a lower redline because of extra stroke ??

Link to comment
Share on other sites

7a-fe produces torque much lower than the 4afe . The cam profile in the 7a produces peak torque at 2800rpm and peak power at 5600rpm.

4a has peak torque at 4800rpm and peak power at 5800.

if you get a jap 4afe ecu it will increase revs to 6000 and add an extra 10nm and 10hp.

only 200cc difference but massive response difference.

7a-fe redlines at 7600 dont know 4a any driveres round here know? My 4afe has aftermarket ecu so i set the revlimit at 8000. never ran the engine with a stock ecu.

Edited by Rosegum
Link to comment
Share on other sites

7a-fe produces torque much lower than the 4afe . The cam profile in the 7a produces peak torque at 2800rpm and peak power at 5600rpm.

7a-fe redlines at 7600 dont know 4a any driveres round here know? My 4afe has aftermarket ecu so i set the revlimit at 8000. never ran the engine with a stock ecu.

7AFEs are gauge-redlined at 6200 rpm. Cutout may be around 7600 but definitely not redline.

Also, the 7AFE in the AE112 has slightly different outputs to the AE102 one, the peak power/torque rpms are different, as well as the ECU mapping and exhaust manifolds being different

Link to comment
Share on other sites

* A 7afe is not just a stroked 4afe, the engines are completly different internally, Pistons are different, Cam profiles are different, Valves are different sizes, 7afe uses a 2 piece oil pan, also the cooling system is different and more efficent on the 7afe then the 4afe's, 7afes cooling system promotes cooler intake temps for better knock resistance and increased volumetric efficency.

* 7afes fuel cut off is 6800, mate i used to be there everyday.

Link to comment
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.




  • Join The Club

    Join the Toyota Owners Club and be part of the Community. It's FREE!

  • Latest Postings

    1. 1

      Vehicle tool kit

    2. 5

      Front oil cooler hose

    3. 0

      ABS/TC Fault?

    4. 0

      Looking for reviews on the “2000 Corolla” automatic

    5. 11

      CH-R sudden engine failure

    6. 0

      car lost all power

    7. 2

      2008 Camry Altise - H7 Bulb Fitting/Loom

    8. 0

      A Toyota Prado has been stolen last night from garage

    9. 11

      Those Deadly Rubber Oil Cooler Lines 2GRFE

    10. 1

      Head light Relay Location corolla 2005 wagon Japan ver. 4AT

×
×
  • Create New...

Forums


News


Membership