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LUBA
 Post subject: Re: 5.7 GSi - Plugs
PostPosted: Tue Aug 28, 2018 6:29 am 
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Joined: Wed Jul 27, 2011 9:07 am
Posts: 133
Location: Freeland, Michigan
What motor? I run those champion plugs in my 01 VP 5.7 GSI.

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2001 Four Winns 298 Vista
Twin 5.7 Volvo Penta GSI DP
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Graham R
 Post subject: Re: 5.7 GSi - Plugs
PostPosted: Tue Aug 28, 2018 3:26 pm 
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Joined: Thu May 18, 2006 12:31 pm
Posts: 2108
Location: Chester, UK
Apart from a negative influence on power output ( the spark is not in the optimum place in the combustion chamber), short reach plugs fitted when long reach ones are specified rarely cause engine issues.

On the other hand, long reach plugs when short reach are required; well, the piston can potentially touch the spark plug electrode; not good !
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LouC
 Post subject: Re: 5.7 GSi - Plugs
PostPosted: Tue Aug 28, 2018 6:15 pm 
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Joined: Thu Jun 29, 2006 10:26 pm
Posts: 5662
Location: Long Island NY
Check your specs but from what I recall the the pre Vortec gets the short reach; Vortec gets long reach.
The pre vortec intake has 12 bolts while the Vortec has only 8.
Do not use long reach in a pre vortec.

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88 Four Winns 200 Horizon
4.3 OMC Cobra-4bbl
2002 Walker Bay 10/2012 Suzuki 2.5
2008 Walker Bay 8

1998 Jeep Grand Cherokee 4.0/Selectrac
2007 Jeep Grand Cherokee 5.7 Hemi/Quadradrive II


Last edited by LouC on Wed Aug 29, 2018 6:09 am, edited 1 time in total.

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LouC
 Post subject: Re: 5.7 GSi - Plugs
PostPosted: Wed Aug 29, 2018 6:11 am 
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Joined: Thu Jun 29, 2006 10:26 pm
Posts: 5662
Location: Long Island NY
I see only 8 bolt holes for the intake manifold therefore it should be a Vortec taking the long reach plugs

_________________
88 Four Winns 200 Horizon
4.3 OMC Cobra-4bbl
2002 Walker Bay 10/2012 Suzuki 2.5
2008 Walker Bay 8

1998 Jeep Grand Cherokee 4.0/Selectrac
2007 Jeep Grand Cherokee 5.7 Hemi/Quadradrive II
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