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2006 STS-V
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36 Posts
Discussion Starter #1
Hey guys, what would you recommend for my next mod? I have an 06 STS-V, 39K miles, with a full intake and tune. What would be the next logical performance mod? Not looking to spend a whole lot or get crazy with her. TimmyC upper 10% OD pulley? I think the lower is a bit more than id like to invest in right now. Let me know what you guys think.
 

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894 Posts
I'd go with cooling mods. You can add the pulley and retune after. But you'll get more consistency with the cooling mods
 

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2006 STS-V
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36 Posts
Discussion Starter #9
Timmy, is that upper or lower? would I need new injectors for this pulley? any other mods needed?

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who besides D3 offers a heat exchanger? and which pump?
 

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2006 STS-V and 2007 STS-V The Murdalac
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It's an upper pulley. Injectors will be maxed out but might not need to be changed. I've done it both ways, just depends on the car. A heat exchanger is a good supporting mood for the 2.4
 

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'06 STS-V, '17 CTS-V
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776 Posts
my thoughts on pump are this, but tell me if Im wrong. For a car with an upper, the slower the gpm of the pump, the longer time for the fluid to cool in the TC exchanger, and therefore the more hest can be absorbed. Am I nuts? Wouldnt a stronger pump defeat the purpose?
 

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2007 STS-V
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213 Posts
Upper pulley or lower, your spinnig the sc faster.pump the coolant slow and more time to absorb heat, pump faster and absorb less heat, plus you have about double the coolant and better heat exchanger to defeat the little heat that it incured threw the ic.i think bigger heat exchanger, bigger pump and double the coolant is better.bigger is better.lol
 

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2006 STS-V and 2007 STS-V The Murdalac
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More pump is always better. Less time in the heat exchanger, yes, but more passes per minute.
 

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'06 STS-V, '17 CTS-V
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776 Posts
TimmyC has a good heat exchanger and jabsco pump is the easiest to install and has great reviews
FACK. Tim I need a pump, and I know you've got 'em. Cannot remember how much.

Whats the Jabsco GPM flow vs. stock, out of curiosity?
 

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2006 STS-V
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36 Posts
Discussion Starter #17
What injectors is everyone upgrading to? Is there a point to choosing the 17% upper over the 27% lower pulley if you have to upgrade injectors either way?
 

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If you don't have the cooling under control you won't get a good result with the lower. The upper will be slightly better without cooling mods.
 
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