3.4" Pulley Install - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


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Old 11-04-2006, 12:03 PM   #1
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Default 3.4" Pulley Install

I am looking at putting a 3.4 pulley on my 98 SSEi. I am just trying to get an idea of what kind of other upgrades are recommended to complete this modification. I already have a 180 thermostat, custom exhaust, (mufflers deleted, custom resonator) hollowed out the air box and fitted it with a K&N, and have the boost solenoid in its optimum location. The car is my daily driver and i tend to drive it pretty normally. (Most of the time ) I already took into consideration that i will have to go with a 71.5 blower belt or upsize to a 3.5" tensioner pulley. This should pretty much cover it I would think but i want to get some ideas before i dive in.
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Old 11-04-2006, 12:13 PM   #2
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the 3.4 SHOULD be ok with the mods that are listed......

we say should because every car is different, some can run a 3.4 with no KR and some have to run a 3.5
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Old 11-04-2006, 01:45 PM   #3
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You might want to add a set of plugs to that NGK TR55s gapped to 0.55 worked well in my car. Run a scan after you get the pulley on just to make sure .
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Old 11-04-2006, 02:00 PM   #4
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Ive been running the 3.4 on my car with no problems at all since July, old spark plugs too, no exh work, and a cheap CAI lol
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Old 11-04-2006, 02:16 PM   #5
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Based on the mods you mentioned I would think that the 3.4" would be safe since you have freed up both the intake and exhaust.
You should consider intalling an auxilliary transmission cooler.
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Old 11-04-2006, 02:17 PM   #6
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I will second that aux trany cooler reply. I installed one off of my old 93 SSEi, any bit of cooling helps, trust me..
No ammount of cooling could of saved mine though
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Old 11-04-2006, 02:35 PM   #7
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I thought a high-flow cat was pretty much a given for the 3.4? All Blown mentioned doing to the exhaust was removing the muffler and resonator. Neither of which have a profound effect on flow right?

Just the point of view of the man with no boost.
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Old 11-04-2006, 02:52 PM   #8
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Default BY THE WAY......

JUST TO ADD, I ALSO USE AC DELCO IRIDIUM PLUGS, GAPPED @ .060[/b]
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