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Lets take a vote (pulley sizes)

 
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What size pulley should I drop to?
3.6
14%
 14%  [ 1 ]
3.5
28%
 28%  [ 2 ]
3.4
57%
 57%  [ 4 ]
Total Votes : 7

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pimpstrocity
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PostPosted: Tue Oct 18, 2011 12:23 pm    Post subject:  Lets take a vote (pulley sizes) Reply with quote

I'm trying to decide what to drop my pulley to. Right now I'm sporting the good ole 3.8 on a l36 bottom end. Full mod list in sig but here it is again:

LS supercharged: Top swap L67 /w 3.8, rebuilt heads, SI performance valves, wizaired CAI, ZZP 3'' dp, SLP 1.8 ratio aluminum roller rockers, SLP ceramic coated headers, GMPP Exhaust, 180* t-stat, tuned /w hp tuners

Yesterday I hooked a boost gauge up, getting about 5.5 pounds of boost, no knock.

So what size pulley should I drop to? No supporting modifications will be being changed at this time.

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2004 impala LS supercharged: Top swap L67 /w 3.8, rebuilt heads, SI performance valves, wizaired CAI, ZZP 3'' dp, SLP 1.8 ratio aluminum roller rockers, SLP ceramic coated headers, GMPP Exhaust, 180* t-stat, tuned /w hp tuners
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00impala123
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PostPosted: Tue Oct 18, 2011 12:29 pm    Post subject:   Reply with quote

With those mods you should be good on a 3.4

basically as long as you have a CAI, headers/dp, 180* stat, and a tune you're good. I would look at doing colder plugs too though.

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chibiblacksheep
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PostPosted: Tue Oct 18, 2011 12:29 pm    Post subject:   Reply with quote

Drop to the next lowest size, scan for KR, tune.

Repeat until you are at the lowest you can be, with a good tune and keeping 0 KR at all times.

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pimpstrocity
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PostPosted: Tue Oct 18, 2011 12:49 pm    Post subject:   Reply with quote

I do have cooler plugs just didn't have that in my sig.

As for dropping one size scanning repeating, I hear ya, but I'd rather not spend the time and money to buy a 3.6 and 3.5 just to scan, tune, and than replace immediately if its good to drop to a 3.4.

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2004 impala LS supercharged: Top swap L67 /w 3.8, rebuilt heads, SI performance valves, wizaired CAI, ZZP 3'' dp, SLP 1.8 ratio aluminum roller rockers, SLP ceramic coated headers, GMPP Exhaust, 180* t-stat, tuned /w hp tuners
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PostPosted: Tue Oct 18, 2011 1:14 pm    Post subject:   Reply with quote

you should be good with a 3.4, but keep in mind you may need to swing up or down from that. If you can afford it, get a quick change style so you arent constantly pressing pullies on and off, risking damage to the snout.

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pimpstrocity
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PostPosted: Tue Oct 18, 2011 2:00 pm    Post subject:   Reply with quote

^^^

Got the zzp mps already Cool

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2004 impala LS supercharged: Top swap L67 /w 3.8, rebuilt heads, SI performance valves, wizaired CAI, ZZP 3'' dp, SLP 1.8 ratio aluminum roller rockers, SLP ceramic coated headers, GMPP Exhaust, 180* t-stat, tuned /w hp tuners
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PostPosted: Tue Oct 18, 2011 2:34 pm    Post subject:   Reply with quote

Just do a 3.4 you have enough supporting mods where you should be still getting 0KR. Just scan and make sure you aren't getting KR after you swap to the 3.4...if you are you can probably just tune it out and be alright. If you can't tune it out thats when youd have to go up in size, but you should be fine.

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PostPosted: Tue Oct 18, 2011 3:12 pm    Post subject:   Reply with quote

pimpstrocity wrote:
As for dropping one size scanning repeating, I hear ya, but I'd rather not spend the time and money to buy a 3.6 and 3.5 just to scan, tune, and than replace immediately if its good to drop to a 3.4.


I agree, but at the same time with the different seasons you would probably have to swap a pulley size anyway, or retune with the changing in air temperatures.

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PostPosted: Tue Nov 22, 2011 5:37 am    Post subject:   Reply with quote

If you're up to 18-19* of timing WOT then you're ready for a pulley drop. Go to 3.6 and if you can maintain 18-19* of timing then you're ready for 3.4
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