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10-12-2010
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#1 |
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Join Date: Sep 2010
Location: Saylorsburg, PA
Posts: 50
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Best spark plugs for a stock ZR-1
Ok....I'm new to the whole LT5 thing, and I've heard alot of differing opinions. So I'll put it out to the forums.....what are your favorite plugs for a stock ZR-1?
(I'm working on a bone stock '91) Thanks, Dave
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[B][I][SIZE=3]Dave Macbeth[/SIZE][/I][/B] 1991 ZR-1 #384 1969 MGB OD, Pertronix, Monza 1972 MGB project Life should be filled with classy music and fast cars! |
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10-12-2010
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#2 |
 
Join Date: Nov 2008
Location: Grand Rapids, MI
Posts: 384
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Re: Best spark plugs for a stock ZR-1
Whatever plugs you get, make sure they are the correct style. 93+ heads used tapered seat spark plugs instead of flat ones. There is a one time 'over-torque' you can perform on the early heads to create the taper, but I don't have that number handy.
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10-12-2010
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#3 |
Join Date: May 2005
Location: Leesburg, VA
Posts: 2,713
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Re: Best spark plugs for a stock ZR-1
For a '91 with the flat seat, I used this NGK iridium plug:
BKR7EIX-11 if I had it to do over again, I'd go with BKR6EIX-11 which is not as cold of a plug. I think it's too cold for the daily driving I do, sometimes the low throttle action gets a bit rough. Some will say "open her up more", but I can't always do that. NGK recommends the BKR5EIX-11, but I've heard some of the stock recommendations are too warm of a plug and can cause knock when driving aggressively.
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Bob Saveland Former owner of #2517 [IMG]http://a.random-image.net/aurora40/vette.jpg[/img] |
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10-12-2010
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#4 |
Join Date: Apr 2008
Location: Gainesville GA
Posts: 231
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Re: Best spark plugs for a stock ZR-1
Call me old fashioned but I prefer the stock plug with the stock motor (ac delco).
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1991 ZR1, White/Red. |
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