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Search results
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GM8 vs Various Turbos
Tuning is definitely a big part. When I went from the stock tune to Heaths with my GM 8 6 years ago, there wasn't much improvement over the stock one. I actually sent it back to them the first time thinking the programming didn't take because I really didn't notice any difference in power...- 1999gmc
- Post #35
- Forum: 6.5 Performance
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GM8 vs Various Turbos
I don't if it was old news or not, but yeah he is tuning OBD II.- 1999gmc
- Post #32
- Forum: 6.5 Performance
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GM8 vs Various Turbos
I got a low boost code with the stock PCM but not with the heath one. I'm thinking you should have tried the KOJO tune before you sent it back. I had a lack of power in OD with the Heath PCM and ATT. I am trying the KOJO one now and it solved my OD problem. So now I have to order my own KOJO...- 1999gmc
- Post #29
- Forum: 6.5 Performance
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