Cams for a stock 4age 16v
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07-22-2008, 08:26 PM
Post: #5
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I've been doing a lot of research into cams, compression and ECU.
Bubble_Drift Wrote:I'm looking for a set of cams to get some good HP gains from a stock 16v. based on what you wrote... the BEST catcams option will be the 7105136. Why??? although you can get a 272 cam to idle on a stock ECU, the 272 cam makes its peak hp ABOVE 8000 rpm, the stock ecu cut is at 7500... so why run a cam that you CAN'T maximize the power for??????? Stock cams are either 232(high compression), or 240(TVIS) duration. each runs out of breath @6600 rpm. Shorter durations increase dynamic compression ratio, which helps to increase low end torque. So what you want is a cam that will achieve peak power close to, but NOT over 7500 rpm, and yet still be of a small enough duration to not harm low end torque. Catcams also shows different cams for each application. Running a "smaller" cam on the exhaust side can boost low end torque some... but the engine is usually limited to the smaller cams rpm limit (this is just informational... not a problem) Oh... one more thing... using "advertised durations" is not a good thing.... if you look, you can find most cams show a 2nd duration number... the 7105136 cams show this 2nd duration number as 222/212. This is a FAAAR better duration to use when comparing. Why??? The advertised duration of catcams exhaust cam is 238. Apparnetly smaller than a stock 240 cam. But in reality it isn't... the stock cam's 2nd duration number is 204... So although it appears the cat cam selection would not rev above 6600 because the exhaust cam is smaller.... in reality it is larger... and so will rev above 6600... Dan - You can | ![]() OST Porting service - http://hachiroku.net/forums/showthread.php?t=19991 |
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Messages In This Thread |
Cams for a stock 4age 16v - Bubble_Drift - 07-19-2008, 07:10 PM
[] - oldeskewltoy - 07-22-2008 08:26 PM
[] - Eircamae86 - 07-22-2008, 09:20 PM
[] - [Walaki]D`Lair - 08-15-2008, 02:56 PM
[] - drift_dancer - 09-28-2008, 04:32 AM
[] - drift_dancer - 10-07-2008, 10:14 AM
[] - totta Crolla - 10-08-2008, 09:22 PM
[] - totta Crolla - 10-08-2008, 10:38 PM
[] - totta Crolla - 10-08-2008, 10:57 PM
[] - Roku_trueno - 02-14-2009, 10:54 PM
[] - totta Crolla - 02-16-2009, 12:54 PM
[] - oldeskewltoy - 02-19-2009, 02:19 AM
[] - oldeskewltoy - 02-19-2009, 06:42 PM
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