Final consensus on SD for a daily driver?
If youre having a tough time with the Map-kpa table, it may worth giving this a shot.
https://www.evolutionm.net/forums/ec...irst-test.html
This is how Ive got mine setup and so far it seems pretty good. Im not going to say its the "best" way, but it works very well for me. And I like having an exact correlation of psi (kpa) to load. It will require a retune of the timing map since load follows the boost curve. And the fuel map if you want the target afrs to be the same as wideband afrs.
just tossing another option out there. Aaron knows his stuff, not taking anything away from that...
By the way...I LOVE SPEED DENSITY!!! The car has never driven better. And I put 50k on the maf before switching over. No hiccups, no starting issues, no tip-in issues.
https://www.evolutionm.net/forums/ec...irst-test.html
This is how Ive got mine setup and so far it seems pretty good. Im not going to say its the "best" way, but it works very well for me. And I like having an exact correlation of psi (kpa) to load. It will require a retune of the timing map since load follows the boost curve. And the fuel map if you want the target afrs to be the same as wideband afrs.
just tossing another option out there. Aaron knows his stuff, not taking anything away from that...
By the way...I LOVE SPEED DENSITY!!! The car has never driven better. And I put 50k on the maf before switching over. No hiccups, no starting issues, no tip-in issues.
Unfortunately, it started snowing in the northeast and the temperature has dropped down quite a bit. My car has been starting up pretty good. There is a weird hesitation for about 2 seconds and then it idles up just fine. As the coolant temp rises, the ride gets smoother and smoother. I have a problem with AFR during WOT spoolup and up to 4500rpm, but i'm sure my MAPve table needs more tweaking. I have no complaints so far, its been everything everyone says.
Last edited by BigT; Oct 30, 2011 at 09:39 PM.
From my experience, you really don't get much change on the tune from altitude and temperature until things get WAY out on the fringe.
Going to a local ski resort in January, I ran into -30F temps and 8900' with 30+mph winds (honestly the coldest day of skiing I've had in 16 years of boarding). My car was tuned at 4200' and ~60F. The car ran fine going up there, AFRs were rock solid the whole way. Got to the parking lot and it had a hint of idle hunt, which my car never really gets. Shut it off, 7 hours of boarding and 8" of snow falling through the hood vent later I jump in to start it...
Lots of sputtering, but no good fires for probably 10 attempts. Little throttle, full throttle, didn't matter, just didn't want to fire. Finally the car stirs to life...then dies. Crank, start, die, repeat. Give it some gas and it fires right up and stays running until I let off the gas to let it idle then it dies again. I finally just have to tend the throttle for about 5 minutes before it will actually idle on it's own, and it is idle hunting like crazy once it finally stays alive on it's own. 5 more minutes as coolant temps get to normal, it's finally fairly stable at idle.
I got home, it worked out. Had me pretty nervous though being on top of the mountain in -30F weather with a car that wouldn't start.
But to be realistic, I never had my car in that extreme of conditions before then or since then and it's the only time I've had starting issue on SD that wasn't warm start issues attributed to the ID1000s. I go boarding A LOT and find my car at 9000' and below 0F often and it never had a problem. Just took -30F along with 9000' to cause problems. For all I know, the car stock might not have been able to pull that off without problems too. Also considering I have a lot of motor work done, getting the car to start at all in those conditions is pretty impressive.
Going to a local ski resort in January, I ran into -30F temps and 8900' with 30+mph winds (honestly the coldest day of skiing I've had in 16 years of boarding). My car was tuned at 4200' and ~60F. The car ran fine going up there, AFRs were rock solid the whole way. Got to the parking lot and it had a hint of idle hunt, which my car never really gets. Shut it off, 7 hours of boarding and 8" of snow falling through the hood vent later I jump in to start it...
Lots of sputtering, but no good fires for probably 10 attempts. Little throttle, full throttle, didn't matter, just didn't want to fire. Finally the car stirs to life...then dies. Crank, start, die, repeat. Give it some gas and it fires right up and stays running until I let off the gas to let it idle then it dies again. I finally just have to tend the throttle for about 5 minutes before it will actually idle on it's own, and it is idle hunting like crazy once it finally stays alive on it's own. 5 more minutes as coolant temps get to normal, it's finally fairly stable at idle.
I got home, it worked out. Had me pretty nervous though being on top of the mountain in -30F weather with a car that wouldn't start.
But to be realistic, I never had my car in that extreme of conditions before then or since then and it's the only time I've had starting issue on SD that wasn't warm start issues attributed to the ID1000s. I go boarding A LOT and find my car at 9000' and below 0F often and it never had a problem. Just took -30F along with 9000' to cause problems. For all I know, the car stock might not have been able to pull that off without problems too. Also considering I have a lot of motor work done, getting the car to start at all in those conditions is pretty impressive.
-03-
That sounds like a nightmare situation. The only thing that would have made it more fun was being in E98. Conditions like that at sea level (even on E85) I will starting fluid the car first to give it a chance.
Aaron
That sounds like a nightmare situation. The only thing that would have made it more fun was being in E98. Conditions like that at sea level (even on E85) I will starting fluid the car first to give it a chance.
Aaron
I just got an sd tune from a known tuner, I wont reveal his name. Im not out to bad mouth anyone. I changed my injectors and went back to pump from e85. To me its just pointless and a pita to run e85 on stock block unless your pushing a stock turbo. I have the hta green and Im not looking to build a block anytime soon. I will be happy with the power I make on pump.
Anyways. I have went to Tom at Tcompusa. So far, he has sent me a base sd 93octane tune for my injectors. We sat at idle for a while an watched the fuel trims. I had this part throttle hesitation. Its gone already. I think Tom really knows what he is doing! The car runs much, much smoother than it did on its 1st sd tune, which was only about a month old.
Check with Tom at Tcompusa for a fix on the part throttle cruise hesitation for guys running sd.
Anyways. I have went to Tom at Tcompusa. So far, he has sent me a base sd 93octane tune for my injectors. We sat at idle for a while an watched the fuel trims. I had this part throttle hesitation. Its gone already. I think Tom really knows what he is doing! The car runs much, much smoother than it did on its 1st sd tune, which was only about a month old.
Check with Tom at Tcompusa for a fix on the part throttle cruise hesitation for guys running sd.
Ahh, you meant those jitter fixes #1, #2 and #3. I know those, not really removing problem totally but helps anyway. I thought there was something new developed for this problem.
that has nothing to do with what i did. his sd was lean spiking previously causing jitter even with the jitter patches enabled. all i did was fix the afr curve to be normal so the car operates like it should.