Does anyone know if the mail order tune guys guarantee any level of open loop A/F accuracy or drive-ability? I am concerned that I will end up with something is is set rich and just relies on feedback to make it right. It seems like people are generally happy with the results they have experienced, but I am still a little sceptical.

 

If you are worried or have a setup that you feel like needs OL tuning, you need to take it to a person with a wideband to be done in-person.

 

Here's what I can say about the accuracy of mail order tunes: utterly worthless.

 

Some guys know how better than others, but I purchased a mail order tune after my cam install, and when I finally did get it to a dyno (no tuner) it was in the high 13s and low 14s at WOT. Not sure how it stayed together

 

id just go get it tuned at a shop man, then theres almost no worries, it is more money... but it comes down to the old sayin.. " you get what you pay for"

 

Find a shop near you and have them write you a baseline tune to get you down to them

 

Buy hpt and do it yourself.