Bosch Plug Question
- Thread starter Jman
- Start date
RedRagTop
Well-known member
What do you notice different from stock?BigRed said:
garycr14
Well-known member
- Joined
- Aug 31, 2002
- Messages
- 260
- Location
- Newark, CA
- Corvette
- 1994 Torch Red Coupe, 1981 Blue Coupe, 1973 Orange
Bosch +4
When I replaced my plugs I used the +4's and found a world of difference, but couldn't say for sure if it was because the old plugs probably had 60k miles on them and anything would have been an improvement, or if the plugs were that much better. I wouldn't think changing the type of plug would give a "seat of the pants improvement". I am happy with them, and do not intend to change until it is time to do so. My mechanic hates them, and is concerned that because it has four prongs which are slightly smaller than one, may heat up, weaken, and possibly fall off under stressful driving (racing), causing damage to the heads, pistons etc... He suggests NGK Iridium, you can check them out on their website, www.ngk.com .
Good luck!
When I replaced my plugs I used the +4's and found a world of difference, but couldn't say for sure if it was because the old plugs probably had 60k miles on them and anything would have been an improvement, or if the plugs were that much better. I wouldn't think changing the type of plug would give a "seat of the pants improvement". I am happy with them, and do not intend to change until it is time to do so. My mechanic hates them, and is concerned that because it has four prongs which are slightly smaller than one, may heat up, weaken, and possibly fall off under stressful driving (racing), causing damage to the heads, pistons etc... He suggests NGK Iridium, you can check them out on their website, www.ngk.com .
Good luck!
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