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Trying to decide Overkill or ZZP tuning

Robby Avery

Robby Avery

New member
I'm trying to decide on tuning here which will be better for a 2003 N/A grand prix. future mods are power log, 3in dp, tb spacer, and tuning. just need input on which is going to be the best tuning for the buck. Thanks in advance
 




How are spacers a waste of money? cool sound and a tiny bit more air every little bit helps IMHO. Still up in the air on tuning here?
 
I purchased a Zzp PCM way back when I first got the car I was not a fan seemed to cause more knock then the stock PCM. Down the road added more mods and went the overkill route could not be any happier..it killed a lot of knock I was getting. The trans shift points were firmer. I rate it a 10 I will in the upcoming months will be making a drive to have a local adjust it for cam and getting my a/f were it needs to be instead of sending it back for a retune.

A few guys seem to have problems with Zzp tunes lately. Only downfall to overkill is it takes time to get in contact with him and since he's in Canada shipping takes time.
 


A tb spacer is a waste because it doesn't make you flow more air and is a possibility for a coolant and vacuum leak.
 


The PCM won't be worth the investment. I had one. Returned it shortly thereafter.

Only thing I noticed were different shift points.

TB spacer will be equally pointless.
 
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