AC delco, Platium or iridium spark plug ??????
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Junior Member
Joined: Jul 2006
Posts: 93
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From: canada,quebec,st-jerome
Car: camaro iroc-z 89
Engine: 383 HSR SC MegaSquirt
Transmission: tko 600
Axle/Gears: 9 Inch 3.75
AC delco, Platium or iridium spark plug ??????
hi all , just want to now what is the best spark plug choice for a l98 tpi . ACDelco, bosh platium or ngk iridium .... i have ngk iridium on mine but it back fire some time and smell rich at idle. i dont know if cause by the spark plug , maybe ... thanks for ur help
Joined: May 2004
Posts: 2,262
Likes: 1
From: houston
Car: 83 POS monte carlo 2015 chevy P/U
Engine: 92 5.7 tpi 5.3
Transmission: 700r4 6L60E
Axle/Gears: 2.42 too high
Re: AC delco, Platium or iridium spark plug ??????
regular A/C Delcos are fine. they are all i have ever run in my car.
with the factory ignition system they will last plenty long.
running the other plugs can lead to misfiring.
with the factory ignition system they will last plenty long.
running the other plugs can lead to misfiring.
Thread Starter
Junior Member
Joined: Jul 2006
Posts: 93
Likes: 0
From: canada,quebec,st-jerome
Car: camaro iroc-z 89
Engine: 383 HSR SC MegaSquirt
Transmission: tko 600
Axle/Gears: 9 Inch 3.75
Re: AC delco, Platium or iridium spark plug ??????
ok but i dont have the stock ignition , i have a msd coil and msd 6al ignition box maybe delco's will fail too soon ...
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Joined: Sep 2004
Posts: 546
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From: Columbia, Missouri
Car: '87 Iroc-Z
Engine: 355cid Cam'd
Transmission: T5 Manual
Axle/Gears: Stock 9 Bolt
Re: AC delco, Platium or iridium spark plug ??????
no sorry youre wrong, I have bosch and they suck. Stick with the Delco, trust me
Thread Starter
Junior Member
Joined: Jul 2006
Posts: 93
Likes: 0
From: canada,quebec,st-jerome
Car: camaro iroc-z 89
Engine: 383 HSR SC MegaSquirt
Transmission: tko 600
Axle/Gears: 9 Inch 3.75
Re: AC delco, Platium or iridium spark plug ??????
ok fine , but right now i dont have bosh platium , i have ngk iridium i dont know if it better than ac delco , maybe some one know...
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Joined: Dec 2004
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From: kissimmee fl
Car: 88 iroc-z z-28
Engine: 383
Transmission: th400
Axle/Gears: 3.42
Re: AC delco, Platium or iridium spark plug ??????
i use ngk tr6's they are amazing IMO. I use a step colder though for the nitrous
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