Toyota MR2 Message Board - View Single Post

Kerry Phillips · 03-08-2009, 12:08 PM

The tranny came from a 1994 Geo Metro-only had 5K miles and was shiney, and only $250! The car had the 7AGE, I think..... The gear ratios are different based on what engine was in the car, I made sure at the time the transaxle had the 3.73 Differential. This is 15% drop in RPM over the 4.33diff. Fortunately, first gear is 15% lower, so the overall gear ratio remains unchanged for first, while 2-5 are changed. The 1-2 Shift might be a little more dramatic.

I solved my problem by heating up the flat metal bar and bending it.

I am off from work for three weeks (Unemployment = paid vacation time) and my one week off from school at the same time! Time to play Mr. Goodwrench.

I read some claims of 42 MPG for some MR2 MK1's, and that the Silvertop is more fuel efficient then the 16V. So with the new gear ratio, moderate cruising speed, and maybe the Honda Civic ignition upgrade...... Ideally I will install an A/F monitor, I have an idea on how to lean out the engine, supposedly the 16V and its ECU ran a little rich, this might be why the 20V is more efficient?
The best MPG I had was about 34. On one trip I only averaged about 27, my thermostat got stuck in the open position during winter. I lost my heater and the engine ran rich because it never came close to reaching normal operating temperature.

03-08-2009, 12:08 PM	#4 (permalink)
Kerry Phillips Cage Fighter Join Date: May 2006 Location: Chattanooga, TN area Posts: 299 Thanks: 0 Thanked 21 Times in 21 Posts iTrader Rating: (0/0% )	What Tranny The tranny came from a 1994 Geo Metro-only had 5K miles and was shiney, and only $250! The car had the 7AGE, I think..... The gear ratios are different based on what engine was in the car, I made sure at the time the transaxle had the 3.73 Differential. This is 15% drop in RPM over the 4.33diff. Fortunately, first gear is 15% lower, so the overall gear ratio remains unchanged for first, while 2-5 are changed. The 1-2 Shift might be a little more dramatic. I solved my problem by heating up the flat metal bar and bending it. I am off from work for three weeks (Unemployment = paid vacation time) and my one week off from school at the same time! Time to play Mr. Goodwrench. I read some claims of 42 MPG for some MR2 MK1's, and that the Silvertop is more fuel efficient then the 16V. So with the new gear ratio, moderate cruising speed, and maybe the Honda Civic ignition upgrade...... Ideally I will install an A/F monitor, I have an idea on how to lean out the engine, supposedly the 16V and its ECU ran a little rich, this might be why the 20V is more efficient? The best MPG I had was about 34. On one trip I only averaged about 27, my thermostat got stuck in the open position during winter. I lost my heater and the engine ran rich because it never came close to reaching normal operating temperature.