3.5 pulley= marginal gaines - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


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Old 04-17-2005, 07:03 PM   #1
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Default 3.5 pulley= marginal gaines

Yessterday Nate (LakevilleSSEi) and myself went to a guys house from mncgp to replace my coupler and install the 3.5". Last night when it was cold out it seemed considerably quicker. However, now that its warm I went for a 40 mile drive and at the end it seemed about like stock. Another thing is, does the 3.4 have much over the 3.5 in terms of hp, tq? I couldn't imagine it being even noticable.

BTW, thanks Nate and the guys from mncgp for making this possible.
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Old 04-17-2005, 07:05 PM   #2
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You'll probably get a 1lb of boost more from the 3.4 and maybe around 5 or 10 HP. However, that extra 1lb can give you some serious KR if your car isn't set up for it.

Also, even with the 3.5, you could be seeing some KR which contributes to the power loss you may feel.
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Old 04-17-2005, 07:15 PM   #3
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you should probably consider investing in a CAI and some new plugs, among other things that go with a general tuneup. Some Top Engine Cleaner will help you out too.
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Old 04-17-2005, 10:13 PM   #4
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Quote:
Originally Posted by Sol
You'll probably get a 1lb of boost more from the 3.4 and maybe around 5 or 10 HP. However, that extra 1lb can give you some serious KR if your car isn't set up for it.

Also, even with the 3.5, you could be seeing some KR which contributes to the power loss you may feel.
werd......dont do a 3.4" unless you are planning on a full intake and exhaust, with my current setup I know im getting KR......but the PEMs are on the way and the RT DP is in my garage awaiting install (thank goodness for the stock market)
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Old 04-17-2005, 11:09 PM   #5
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Give the car about a week for the PCM to learn and the car will probably do better. You are probably seeing some KR which is why it feels slower. Also, it is probably quicker than it was before, but since you put the pulley down and it was cold it was faster, and now it warmed up and you might be seeing some/more KR and its slower so since your used to what it did after the pulley you think its slower than it was before. (hopefully that makes sense to you)

Put on a CAI, colder plugs, t-stat, and maybe a DHP and you should probably kill most of your KR and the car should feel much quicker.

Shawn
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Old 04-18-2005, 01:09 AM   #6
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I'm also thinking about the fact that I gapped my NGK TR55'* at 0.60 insted of 0.55 like I should. Nate gapped his at 0.60 but forgot the fact that he has intake & exaust. I don't. My only supporting mods are: NGK TR55'*, 180 t-stat, and gutted air box w/ K&N drop in filter.
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Old 04-18-2005, 01:10 AM   #7
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Drop the gap down to .054 or so like you said, and put a CAI on, and a PCM like I said and you should be doing a lot better.

Shawn
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Old 04-18-2005, 01:13 AM   #8
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Yup, i'll prolly order the PCM ASAP. BTW- how does the PCM help combat KR?
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Old 04-18-2005, 01:18 AM   #9
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Quote:
Originally Posted by fantastic88
Yup, i'll prolly order the PCM ASAP. BTW- how does the PCM help combat KR?
Better fuel & timing tables. It also, at least some versions do, has a faster recovery rate for KR, meaning when there is KR and then lets say it goes away, the PCM will give you full timing back quicker than it would've before. And it makes the car have much better driveability on the street due to shiftpoints and all that stuff as well so its worth the money just for that.

Shawn
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