Well the car is still not here yet...gd. But I talked to the previous owner about the tune today. It is currently tuned for 93 ocatne gas. He has a map that he is going to e-mail me for the race gas. So it is not as off as I thoght (for 91 gas). I will have it tuned asap but I was even afraid to drive it to get tuned until I learned more. Thanks for the advice from everyone.

 

tune it fast..or boom

 

I have said on this thread many times that I am going to tune it "fast". But come on "boom" is bull. I have been around High performance cars long enough to know manure when I smell it. What I mean is You are trying to tell me that if the guy who owned the car before me drove it to Albuquerque (5200 feet MSL) and put 91 octane in the car (premium at the pump) that he would blow it up if he did not retune it while he was in town. That is ridiculous. I think alot of people on this forum are teying to make magic out of something that is really pretty straight forward.

 

if the car is tuned for a certain level of boost, the timing may not change enough when and if you "de-boost" If it is retarded(timing) and you feed a lot less air, he can get pre det. or post. (dont know, the car is not in front of me) the pre det. is where "grenading" comes from. The piston is rising on the compression stroke and before it gets near the top, bang. The crank shaft and the internal combustion at the same time....not good for our pistons.

 

I was told by an AEM mech that since the car is on speed density that altitude changes should not affect the tune. Also, I am not planning on de-boosting. The tune on the car has the boost set pretty low right now, so the issues you brought up do not apply, no? The 91 octane is different than the car is tuned for (93) but running on 91 for a while should not make the car grenade. If it was on a really high level race tune it could but otherwise I don't think so and neither does my tuner. He suggested running it a few days on 91 , at altitude and with my driving habits to see where it is and where I want it to be before the tune. I am not going to race it at all or WOT it much before the new tune so this strategy makes sense to me.

 

If you don't know how ask the tuner to show you how to hook the laptop up to the ECU. Connect to the ECU, click on templates, load the fuel template, the go to log and start logging. Drive it as you normally would. Stop, save the log, disconnect from the ECU, shut off the car. Do that several times using either the fuel or ignition template and then go over the logs with your tuner. As long as you are not running around at full boost and drive it conservatively you'll be OK. Go to www.aempower.com and sign in as a guest. Look at the forums, download the software and familirize yourself with it. If nowone will give you a MAP or log to look at PM me with your email address and I will. I may be slow, I work alot, but I'll get one to you. Make sure you leave me your email.

 

Thanks for the good advice. This gives me a great place to start!

 

 

OK, so I just got back my car from Solid-Technology in Albuquerque. The car seems to run a lot better and is at about 20 lbs boost. Running good on 91 octane. Still having trouble with initial start. Has to turn over about 5-6 times before starting most times. But before I took it in it would hardly start at all on hot start - way too rich. It was also stalling after hot starts. Does not seem to stall anymore. Feels a little more powerful! Anyway so far satisfied with the tune. Iwill keep everyone posted.

 

Go to www.aempower.com and register for the electronic forums. Do a search and you can fix your starting poblems.

 

a quote for your long cranking issues from the AEM forums

"We have found a setting in the software that is affecting this issue.

Go to Setup/Sensors/cam-crank sensors/advanced then click on the template. You are looking for "Tooth time min" which is in the upper left hand options window. Change this number to 500!

If you are still having excessive cranking issues, look at your fuel under cranking as usual.

Jason."