4A-GE engine mix - question

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4A-GE engine mix - question

11-04-2011, 07:28 PM

Post: #57

oldeskewltoy Offline

4AG Super Genius ;)

Posts: 1,822
Joined: Jan 2007
Reputation: 1

Wow... lots going on in here........

You can machine the keeper end of the valve some to gain back what is lost. Personally I wouldn't sink the valves... too much overall cost.

FACT: ALL 16V 4AGES, large port and small port begin life (stock unshaved) between 36, and 36.25 cc To get an unported head down to 32cc that head would have to been cut very deep

[Image: AEU86 AE86 - ]

I have opened up a head once before. From 36cc to nearly 39cc - note the 2 chambers on the left, compare those to the 2 on the right. The 2 on the right now measure nearly 39cc each

[Image: AEU86 AE86 - ]

here is a shot showing before and after on one chamber

[Image: AEU86 AE86 - ]

Finally, the changes by the numbers - note the squish areas have only changed minimally at most

[Image: AEU86 AE86 - ]

Another area to "tune" your compression.... Are your Wiseco pistons pointed? You can usually have some of that pointed amount removed - have you machinist check, by as much as 2mm of the crown center can be machined away, this is another option in lowering static CR

[Image: AEU86 AE86 - ]

Dan -

You can | Sad

.... OR you can ask for help!!!

OST Porting service - http://hachiroku.net/forums/showthread.php?t=19991

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Messages In This Thread

4A-GE engine mix - question - Maren - 11-26-2010, 03:55 PM

[] - Ivan141 - 11-26-2010, 06:55 PM

[] - Maren - 11-26-2010, 07:40 PM

[] - oldeskewltoy - 11-26-2010, 07:42 PM

[] - Uzelac - 03-04-2011, 08:10 PM

[] - oldeskewltoy - 03-05-2011, 08:50 AM

[] - Uzelac - 03-05-2011, 02:54 PM

[] - oldeskewltoy - 03-08-2011, 07:56 PM

[] - Uzelac - 03-09-2011, 01:55 AM

[] - oldeskewltoy - 03-09-2011, 02:05 AM

[] - Uzelac - 03-09-2011, 03:55 AM

[] - Project D - 03-09-2011, 02:26 PM

[] - Uzelac - 03-09-2011, 03:04 PM

[] - oldeskewltoy - 03-09-2011, 07:29 PM

[] - Uzelac - 03-10-2011, 02:33 AM

[] - oldeskewltoy - 03-10-2011, 03:59 AM

[] - Bean - 03-10-2011, 09:51 AM

[] - Project D - 03-10-2011, 12:22 PM

[] - Uzelac - 03-10-2011, 01:13 PM

[] - Nomuken - 03-10-2011, 01:56 PM

[] - Uzelac - 03-10-2011, 02:48 PM

[] - Project D - 03-10-2011, 03:45 PM

[] - Uzelac - 03-10-2011, 04:57 PM

[] - Bean - 03-10-2011, 05:41 PM

[] - Uzelac - 03-10-2011, 05:50 PM

[] - Project D - 03-10-2011, 05:57 PM

[] - Bean - 03-10-2011, 05:58 PM

[] - oldeskewltoy - 03-11-2011, 04:34 AM

[] - Uzelac - 03-19-2011, 01:48 PM

[] - oldeskewltoy - 03-20-2011, 05:04 AM

[] - Uzelac - 03-20-2011, 10:26 AM

[] - Uzelac - 11-02-2011, 12:29 AM

[] - Bean - 11-02-2011, 08:43 AM

[] - Uzelac - 11-02-2011, 10:35 AM

[] - Uzelac - 11-02-2011, 10:44 AM

[] - Bean - 11-02-2011, 12:02 PM

[] - NoHachi - 11-02-2011, 12:25 PM

[] - Uzelac - 11-02-2011, 12:40 PM

[] - Bean - 11-03-2011, 06:39 AM

[] - Uzelac - 11-03-2011, 11:41 AM

[] - Bean - 11-03-2011, 11:53 AM

[] - Uzelac - 11-03-2011, 12:36 PM

[] - NoHachi - 11-03-2011, 12:44 PM

[] - Uzelac - 11-03-2011, 02:37 PM

[] - Bean - 11-03-2011, 02:40 PM

[] - Uzelac - 11-03-2011, 03:03 PM

[] - Project D - 11-03-2011, 03:18 PM

[] - Uzelac - 11-03-2011, 03:51 PM

[] - NoHachi - 11-03-2011, 03:54 PM

[] - Bean - 11-03-2011, 03:56 PM

[] - Uzelac - 11-03-2011, 04:08 PM

[] - Uzelac - 11-03-2011, 04:11 PM

[] - Project D - 11-03-2011, 04:11 PM

[] - Uzelac - 11-03-2011, 04:15 PM

[] - NoHachi - 11-03-2011, 04:20 PM

[] - Project D - 11-03-2011, 04:23 PM

[] - oldeskewltoy - 11-04-2011 07:28 PM

[] - NoHachi - 11-04-2011, 08:27 PM

[] - oldeskewltoy - 11-04-2011, 09:38 PM

[] - Uzelac - 11-05-2011, 12:48 AM

[] - Uzelac - 12-05-2011, 01:15 PM

[] - NoHachi - 12-05-2011, 05:21 PM

[] - Uzelac - 12-06-2011, 02:46 PM

[] - Uzelac - 01-14-2012, 03:08 AM

[] - totta Crolla - 01-14-2012, 11:50 AM

[] - Uzelac - 01-17-2012, 05:10 PM

[] - Uzelac - 03-07-2012, 11:31 AM

[] - Bean - 03-07-2012, 11:36 AM

[] - Uzelac - 03-07-2012, 12:08 PM

[] - Bean - 03-07-2012, 12:23 PM

[] - Uzelac - 03-07-2012, 12:36 PM

[] - oldeskewltoy - 03-08-2012, 04:13 AM

[] - Bean - 03-08-2012, 12:35 PM

[] - Uzelac - 03-08-2012, 01:01 PM

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