MIVEC tuning
#77
The odd thing is it is the GT that has the magnesium compressor wheel and different cover, yet apparently it has the same map as the GSR!
The RS map does seem to help spool up on the GSR though.
The RS map does seem to help spool up on the GSR though.
#78
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Originally Posted by jcsbanks
The odd thing is it is the GT that has the magnesium compressor wheel and different cover, yet apparently it has the same map as the GSR!
The RS map does seem to help spool up on the GSR though.
The RS map does seem to help spool up on the GSR though.
#82
Have you tried? and how do you know nothing happens? When you say nothing happens do you mean you don't gain anything or that the ecu does not processes the -'s?
as posted by f-dub would be a good reason to go negative at ~7k or so.
http://www.billzilla.org/engvariable.html
as posted by f-dub would be a good reason to go negative at ~7k or so.
http://www.billzilla.org/engvariable.html
#83
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Because Mitsu says in their service manual that it doesnt, that is why I know it doesnt go negative. There is 30 crank degrees of movement in the MIVEC (covered here in this very thread I believe) and the intake duration as listed by Mitsu starts off IVO 0-30 BTDC.
Actually the camshaft also starts off at what is the equivalent of -5 cam degrees compared to an VIII per Mark at Turbotrix and deducing from this photo (notice cam marks in relationship to each other):
http://img.photobucket.com/albums/v5...mivecmotor.jpg
The best I have found with stock IX cams is to have the cam retarded about 1.5* (cam degrees) which means advancing it on the stock map (which mind you is in crank degrees).
Actually the camshaft also starts off at what is the equivalent of -5 cam degrees compared to an VIII per Mark at Turbotrix and deducing from this photo (notice cam marks in relationship to each other):
http://img.photobucket.com/albums/v5...mivecmotor.jpg
The best I have found with stock IX cams is to have the cam retarded about 1.5* (cam degrees) which means advancing it on the stock map (which mind you is in crank degrees).
#85
Originally Posted by JohnBradley
Because Mitsu says in their service manual that it doesnt, that is why I know it doesnt go negative. There is 30 crank degrees of movement in the MIVEC (covered here in this very thread I believe) and the intake duration as listed by Mitsu starts off IVO 0-30 BTDC.
Actually the camshaft also starts off at what is the equivalent of -5 cam degrees compared to an VIII per Mark at Turbotrix and deducing from this photo (notice cam marks in relationship to each other):
http://img.photobucket.com/albums/v5...mivecmotor.jpg
The best I have found with stock IX cams is to have the cam retarded about 1.5* (cam degrees) which means advancing it on the stock map (which mind you is in crank degrees).
Actually the camshaft also starts off at what is the equivalent of -5 cam degrees compared to an VIII per Mark at Turbotrix and deducing from this photo (notice cam marks in relationship to each other):
http://img.photobucket.com/albums/v5...mivecmotor.jpg
The best I have found with stock IX cams is to have the cam retarded about 1.5* (cam degrees) which means advancing it on the stock map (which mind you is in crank degrees).
#86
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Originally Posted by cbrtrx
are you sure that the camshaft is -5 derees when your map is at 0, id just think that -5 is alot to run on a stock car in the higher rpms
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Bringing this back from the dead.
So has anyone found good (any) gains from modifying the VVT Map? I've read this thread and saw 4-5 different custom MIVEC maps..
My current map at 6500RPM shows values other than "0" in the 180+ cells (Stock has them at 0..)
Not sure if this is helping or not.
So has anyone found good (any) gains from modifying the VVT Map? I've read this thread and saw 4-5 different custom MIVEC maps..
My current map at 6500RPM shows values other than "0" in the 180+ cells (Stock has them at 0..)
Not sure if this is helping or not.