I believe GM uses a mass airflow sensor rather than the speed density system that CC
uses. Most turbos use a rich mixture to control detnation
KW
jim miller wrote:
> I don't know about the size you need but my GMC Syclone had 28.5 stock and it was
> bad about knocking under turbo boost. I changed to 32 pound injectors and pretty
> much cured the knock. Did not idle rough, did not run over rich and did not hurt
> gas mileage. BTW that truck got 13 mpg in town and 18 mpg on hwy with a 280 hp
> 4.3 ltr v6, all wheel drive 4 speed auto and 3.43 axle ratio
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