4A-GE engine mix - question

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4A-GE engine mix - question

03-10-2011, 12:22 PM

Post: #18

Project D Offline

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oldeskewltoy Wrote:
Project D Wrote:with cam around 300°, 12:1 is pretty fine actually :wink:

actually might not be enough compression!!

Actually you are right, 12:1 for 300 camshaft is a little bit low to get the maximum efficiency, but it also more reliable for a "street car".
(For real 300° @ 100° ATDC you are supposed to get something around 13.5 / 14:1)

But it depend of the "real" duration of the camshaft Smile

304° is the duration @ 0mm but most manufacturer also give the duration @ X lift (0.1mm for most japanese brand) and this duration is more accurate to calculate the DCR.

Quote:Uzelac - BEFORE you do ANYTHING, I strongly recommend you research "dynamic compression ratio". Learn how camshaft duration can affect cylinder pressures.

I have made a little program on excel for that Tongue

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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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