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I put a MSD Blaster Coil on my engine last October. I have to say this is the ONLY thing I have bolted onto my truck, and I do mean bolted, that has actually IMPROVED my mileage. I got mine from Summit for a wopping $52 including shipping and handling. To install it all you have to do is take off your air filter housing, locate your stock coil, unplug the 3 wires going to it, unbolt it, drill out the rivets that hold it to the metal frame, bolt the MSD coil to that metal frame, reinstall the MSD coil and frame in the factory location, plug the wires back in, reinstall the air filter housing, and you are ready to go. Only took me about an hour. Someone who actually can claim to be mechanically inclined could do it much faster. Much, much faster to be honest./wwwthreads_images/icons/crazy.gif
Like I said, cheap and easy to do.
Now, at first I didn't notice any improvements. Drove same as before and gas mileage was unchanged. Then I was advised that I should open the gap in my plugs a little. I just use the AC Delco replacement plugs, nothing special. First off I opened them up .010 over the factory settings, so I was at .045. No noticeable improvement in driving, but my mileage went from 280-290 a tank to 310-320 (I live in SoCal, all stop and go driving). The engine seemed to be running fine, so I decided to push my luck a bit and open the plugs up some more. Another .005 to .050. It drives the same as it did before, but now I am getting about 330-340 a tank (same stop and go driving). So I am not getting about 1.5 mpg more than I was before I put the MSD coil on. For $52.
As far as I can tell, it should work for all GM TBI engines. None of the ads I have seen for it differentiates between engines, just say GM TBI. The MSD part number is MSD-8226. That is the part number that Summit uses.
Just wanted to share this little doohickey with my fellow TBI users./wwwthreads_images/icons/smile.gif Try it, I can't see how it would hurt you any, and you will either be out $50 or be getting better gas mileage.
1992 Blazer Sport, 350 TBI, 3" Flowmaster 40 DF, 4L60, K&N, Rancho 2.5" lift, 285/75R16's on 16x8 Bajas /wwwthreads_images/icons/laugh.gif
Like I said, cheap and easy to do.
Now, at first I didn't notice any improvements. Drove same as before and gas mileage was unchanged. Then I was advised that I should open the gap in my plugs a little. I just use the AC Delco replacement plugs, nothing special. First off I opened them up .010 over the factory settings, so I was at .045. No noticeable improvement in driving, but my mileage went from 280-290 a tank to 310-320 (I live in SoCal, all stop and go driving). The engine seemed to be running fine, so I decided to push my luck a bit and open the plugs up some more. Another .005 to .050. It drives the same as it did before, but now I am getting about 330-340 a tank (same stop and go driving). So I am not getting about 1.5 mpg more than I was before I put the MSD coil on. For $52.
As far as I can tell, it should work for all GM TBI engines. None of the ads I have seen for it differentiates between engines, just say GM TBI. The MSD part number is MSD-8226. That is the part number that Summit uses.
Just wanted to share this little doohickey with my fellow TBI users./wwwthreads_images/icons/smile.gif Try it, I can't see how it would hurt you any, and you will either be out $50 or be getting better gas mileage.
1992 Blazer Sport, 350 TBI, 3" Flowmaster 40 DF, 4L60, K&N, Rancho 2.5" lift, 285/75R16's on 16x8 Bajas /wwwthreads_images/icons/laugh.gif
