MIVEC tuning
Oct 22, 2006, 09:55 PM
#182
Originally Posted by cbrtrx
can you please post up all three maps you ran with the same a/f as well, cause you posted that the aggresive map which has 0s up top made the highest power of the day, then you said that more advance in mivec makes more power down low and more power up top, im not concerned with spool up or midrange at all, im only focusing on peak power from 6k on up, so what im asking you is with all the mivec maps you tested with the same fuel map, what mivec map made the most peak hp from around 5.5k on up, johns map with the mivec advanced up top? or the other map were its all 0s, thank you
Oct 22, 2006, 09:56 PM
#183
Originally Posted by JohnBradley
Map doesnt adjust under 0* or over 30*
John, pm sent.
Oct 22, 2006, 10:07 PM
#185
Originally Posted by JohnBradley
The one with the 33's in it? I am lost about which one is the aggressive one.
When i get some time, i'll actually play with the values and see what happens.
Oct 23, 2006, 05:51 AM
#188
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Originally Posted by eficker
I agree. I dont think that the power is found in making the cam static, which is what those tests will do. I think that the power is found in the variation, to make it spool fast, and then hold the power to redline.
John, pm sent.
John, pm sent.
I don't doubt the best overal power is to be found with a variable map. However doing those static tests should allow you to see torque curve with the cam. And then allow you to choose which one is better at which area in the RPM range.
Oct 23, 2006, 12:07 PM
#191
Desktop Dyno2000 is cheap and effective. There is one thats like 400 bux thats called DynoSim (I think) thats sposed to be pretty good.
DD2000 requires you know the lobecenter (or cam engineering will do), lift, duration, etc.
It has a few issues but it gives you a fairly good idea where power can be made, and whats going on when you alter the Intake cam relative to the exhaust (without changing the exhaust).
Its power simulation algorithm doesnt take into account accessories as far as power delivery, and its forced induction routine kinda has to be fudged with to get what you need.
But with a Chevy or ford its within 1% and usually reads low. So I tend to trust it for the most part.
DD2000 requires you know the lobecenter (or cam engineering will do), lift, duration, etc.
It has a few issues but it gives you a fairly good idea where power can be made, and whats going on when you alter the Intake cam relative to the exhaust (without changing the exhaust).
Its power simulation algorithm doesnt take into account accessories as far as power delivery, and its forced induction routine kinda has to be fudged with to get what you need.
But with a Chevy or ford its within 1% and usually reads low. So I tend to trust it for the most part.
Last edited by JohnBradley; Oct 23, 2006 at 12:09 PM.
Oct 23, 2006, 03:02 PM
#194
Assuming those GSC 280s are ground on the same LCs as the HKS cams, the general tuning pattern should be the same, however . . .
The longer duration cams give more overlap at the same settings. This being the case, one should be prepared to scale the numbers down, across the board by an appropriate factor, for the purpose of reducing the overlap just a bit. I'd run it once on the dyno, then scale everything down maybe by 10% and make observations.
The longer duration cams give more overlap at the same settings. This being the case, one should be prepared to scale the numbers down, across the board by an appropriate factor, for the purpose of reducing the overlap just a bit. I'd run it once on the dyno, then scale everything down maybe by 10% and make observations.
Last edited by Ted B; Oct 23, 2006 at 03:17 PM.
Oct 23, 2006, 03:19 PM
#195
Guerillah
I would have to know what the lobecenters are for the cams, not just the duration. I could give you a rough idea and tell you to play with it from there if thats what you want. I actually have a prototype map for the day I get big cams, you are welcome to take a look at it if you want. PM me your email and I will get it off to you tonight.
Cliffs- Ted is right
I would have to know what the lobecenters are for the cams, not just the duration. I could give you a rough idea and tell you to play with it from there if thats what you want. I actually have a prototype map for the day I get big cams, you are welcome to take a look at it if you want. PM me your email and I will get it off to you tonight.
Cliffs- Ted is right