Do I need a computer tune?

[gearheadbob]

Have a 99 T/A with full bolt on, minus long tubes headers.
I 'am about to put long tubes on and I was needing to know if I will have to tune.

Thanks Gearheadbob

[mrr23]

do you HAVE to tune, no. should you, yes. i ran around for a while with stock tune and most bolt ons.

[nhraformula]

agreed with above.

[Capster78]

I really dont see a need to tune your car untill you get a Cam. The computer usually will adjust for boltons. You will pull out a few extra ponies but is that really worth the cost of dyno tuning.. Not in my opinion.

[hammertime]

I really dont see a need to tune your car untill you get a Cam. The computer usually will adjust for boltons. You will pull out a few extra ponies but is that really worth the cost of dyno tuning.. Not in my opinion.

Good point. If you plan to get a cam, or heads and cam, down the road, you will definitely need to tune then. If headers is the last mod you want to do for a while, you will get some modest gains from a tune, but as stated it is not mandatory.

[Bombguy99Z28]

The computer will adjust for part throttle conditions, the computer will not adjust for wot conditions. You would basically be hoping that the car will run somewhere within the acceptable A/F ratios (12.5-13.5) but the computer ultimately cannot do much about that without tuning.

The more mods you do without tuning, generally the more horsepower you leave unusable. You wouldn't neccessarily need a dyno tune, but having a friend or something make sure you are ballpark is a good idea.

[Wikid NaSSty]

I agree that a tune is not required...but it is a good thing. Get a MAF tranlator.....its not as effective a as a full dyno tune but you can adjust the MAF signal to get ur car operating at a better A/F ratio if you have a way to monitor your o2 voltage and/or knock retard. I use a scanmaster for that.

[keliente]

I really dont see a need to tune your car untill you get a Cam. The computer usually will adjust for boltons. You will pull out a few extra ponies but is that really worth the cost of dyno tuning.. Not in my opinion.

I disagree. Unless you plan on adding a cam like...next week, then get a tune. Adding headers I made 339hp and 342 ft/lbs tq. After a tune, 351hp and 355 ft/lbs tq. I gained almost as much from the tune as I did from the headers alone. I also like knowing that my air fuel ratios & timing is as good as it can be, so that I am not missing out on any power.

I mean heck the least you can do is a mail order tune, which run around $150. Experienced tuners have seen every bolt-on setup in the book and can get you pretty damn close to what you'd see on a dyno.