I don't have the cash for an upgraded TMIC or FMIC, so I decided to mess around with the stock TMIC.
I pulled it off and took the coldpipe off and took a better look at what the air flowing in and out of the IC has to contend with. It didn't look good. You can definitely see where saving production costs meant more than making power. The bosses for the coldpipe bolts stick much farther into the airflow path than they need to. There are also a few places where the metal was cast much thicker than it needed to be, and where rough transitions were chosen over smooth transitions. About an hour with a porting bit and sandpaper roll took care of all of these problems. I took the end tanks off the core so I could do this work without getting metal particles into the IC core where it would be nearly impossible to clean them completely out.
I have pictures of exactly what I did inside the end tanks and cold pipe, but apparently I left my camera at work that has the pictures on it. I'll edit this with pictures as soon as I can. I do have the dyno charts though, I emailed those to myself.
Some people might think this is a waste of time... I don't. I noticed a huge difference in the way the car drives after doing this. It seems to be happier at higher RPM and have a bit more power. The dyno charts seem to back it up. It didn't gain alot of power, but it extended the power curve farther up. The only problem is I don't have a stock IC to do back to back comparison runs with the ported one. I did use the exact same dyno for all of the runs though, my Dynocom DC1800SZ. The first chart is the "before" set of dyno runs I did last fall to compare the effect resetting the ECU has on the power. The blue line is the "normal" power level. Ignore the red line. The second chart is from this past saturday. I did three runs, the black line was the warmup run, the other two are the ones to look at. I'm not sure what's up with the last run (green lines) not having that power dip that all the other runs have. You'll also notice that I did the second set of runs from 3000rpm instead of 2500... I didn't feel stressing the motor at low RPM was necessary. I also had to change the scaling due to the car cresting over 300whp for a bit. I would love to have a stock IC here to do back to back comparison runs... but I don't... so this is the closest I can get. Interesting results for a basically free mod.
I just had a thought... I'm going to see if I can overlay the blue run from the first chart and the green run from the second chart on one chart with the dyno software. I don't know why I didn't think of that earlier. Comparing them would be alot easier without the scaling differences.
Look below for more pics... it cut them off here.
I pulled it off and took the coldpipe off and took a better look at what the air flowing in and out of the IC has to contend with. It didn't look good. You can definitely see where saving production costs meant more than making power. The bosses for the coldpipe bolts stick much farther into the airflow path than they need to. There are also a few places where the metal was cast much thicker than it needed to be, and where rough transitions were chosen over smooth transitions. About an hour with a porting bit and sandpaper roll took care of all of these problems. I took the end tanks off the core so I could do this work without getting metal particles into the IC core where it would be nearly impossible to clean them completely out.
I have pictures of exactly what I did inside the end tanks and cold pipe, but apparently I left my camera at work that has the pictures on it. I'll edit this with pictures as soon as I can. I do have the dyno charts though, I emailed those to myself.
Some people might think this is a waste of time... I don't. I noticed a huge difference in the way the car drives after doing this. It seems to be happier at higher RPM and have a bit more power. The dyno charts seem to back it up. It didn't gain alot of power, but it extended the power curve farther up. The only problem is I don't have a stock IC to do back to back comparison runs with the ported one. I did use the exact same dyno for all of the runs though, my Dynocom DC1800SZ. The first chart is the "before" set of dyno runs I did last fall to compare the effect resetting the ECU has on the power. The blue line is the "normal" power level. Ignore the red line. The second chart is from this past saturday. I did three runs, the black line was the warmup run, the other two are the ones to look at. I'm not sure what's up with the last run (green lines) not having that power dip that all the other runs have. You'll also notice that I did the second set of runs from 3000rpm instead of 2500... I didn't feel stressing the motor at low RPM was necessary. I also had to change the scaling due to the car cresting over 300whp for a bit. I would love to have a stock IC here to do back to back comparison runs... but I don't... so this is the closest I can get. Interesting results for a basically free mod.
I just had a thought... I'm going to see if I can overlay the blue run from the first chart and the green run from the second chart on one chart with the dyno software. I don't know why I didn't think of that earlier. Comparing them would be alot easier without the scaling differences.
Look below for more pics... it cut them off here.
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