Toyota MR2 Message Board - View Single Post - 93 5sfe

mrturrari · 09-22-2007, 01:43 AM

Another update...

Still have a slight misfire showing up once or twice a day. I'm not sure what is causing it but it's good enough that I am going to try to move forward with the rest of my plans.

So today I put 315cc injectors and a 3sgte MAP sensor in and did some rough tuning. I still need to tune out that lean spot at part throttle between 2000-3000 rpms that keeps showing up. It's hard to pin it down to a set of specific load points as it happens only once in a while. Maybe it's time to do a ride along with someone else driving. At idle I had to pull a bit of fuel to get it in a range where the closed loop mode could somewhat consistently get it to 14.7 AFR and then had to add fuel as the load got greater across the map. I'm sure even with the addition of fuel the 315cc injectors and 2 bar MAP are making the ECU advance the timing a bit. Just to be safe I set my base back to 10 degree (I was running it at 12) and I'll play with that as time goes on. At WOT it is running great and holds an AFR around 13.8-14.0:1 after some tuning. With the maps at 0 it was in the 14-15:1 range which is great for power but not for cold days or having a margin of safety.

So now that I have some extra headroom to add fuel if I need it I can get ready to put the new cams in. This fuel setup should be enough for 200rwhp NA but with a 6300 red line that isn't going to happen. Almost time to take bets on what kind of dyno numbers it's going to put out.

09-22-2007, 01:43 AM	#4 (permalink)
mrturrari I <3 my 5sfe Join Date: Mar 2005 Location: Salt Lake City, Utah Posts: 511 Thanks: 2 Thanked 125 Times in 82 Posts iTrader Rating: (0/0% )	Another update... Still have a slight misfire showing up once or twice a day. I'm not sure what is causing it but it's good enough that I am going to try to move forward with the rest of my plans. So today I put 315cc injectors and a 3sgte MAP sensor in and did some rough tuning. I still need to tune out that lean spot at part throttle between 2000-3000 rpms that keeps showing up. It's hard to pin it down to a set of specific load points as it happens only once in a while. Maybe it's time to do a ride along with someone else driving. At idle I had to pull a bit of fuel to get it in a range where the closed loop mode could somewhat consistently get it to 14.7 AFR and then had to add fuel as the load got greater across the map. I'm sure even with the addition of fuel the 315cc injectors and 2 bar MAP are making the ECU advance the timing a bit. Just to be safe I set my base back to 10 degree (I was running it at 12) and I'll play with that as time goes on. At WOT it is running great and holds an AFR around 13.8-14.0:1 after some tuning. With the maps at 0 it was in the 14-15:1 range which is great for power but not for cold days or having a margin of safety. So now that I have some extra headroom to add fuel if I need it I can get ready to put the new cams in. This fuel setup should be enough for 200rwhp NA but with a 6300 red line that isn't going to happen. Almost time to take bets on what kind of dyno numbers it's going to put out.