ZL1 pulley upgrade

[Allmotor1313]

Originally Posted by scdrj

I installed a Texas Speed 9.1 lower and a Roto-Fab. Did the work myself, and only had $670 invested. All stock besides that...including tune. It picked up 7 tenths in the 1/8th. I do use Torco at the track, and 93 for everyday driving.

BTW, add $50 more for a new belt.

Do you know how much hp you gained?

[hognutz]

what is you injector duty cycle and boost level? the texas speed is cheaper but it is fixed you can't change the pulley.

I have been interested to see if there boost numbers match the other kits because they seemed lower in there post.

[eodtech72]

Originally Posted by scdrj

No idea, but the consensus is around 75hp. Seat of the pants says it must be a pretty strong 75hp



Have no idea, but it seems to work. With the CAI, the factory gauge says ~12psi. I like it because it looks stock. People did not like it because it was heavier than the very heavy stock unit. If you look at the attached pic, you can see how I tapered the face of it. It took off 2 lbs. I could have taken more off, but I wanted to retain the stock appearance, especially since I have retained the factory tune. I checked the balance, and tweaked it a bit, but the small amount of weight that came out was from the same place they had been drilling it. Hell, I'm sure it was probably made in China, so the balance may have been out that much coming out of the box...

Have you data logged your car? I'd like to add that pulley since they have a lighter aluminum version now. Just wondering if I could run it with a CAI and ported TB on the stock tune safely..?

[vyfxbrunowfr]

It is also much easier to install IMO

[tpower]

I have used balancer and pulley if you would like to save around $300.00

http://www.camaro5.com/forums/showthread.php?t=379759

[jessrayo]

I suggest you take it to a competent shop and have an upper pulley done and make sure they change the isolator. Your 2013 will have the spring isolator and once you change any pulley the dealers are not going to want to warranty the supercharger. If you have the upper and isolator changed at the same time it is all fixed. Change the injectors and you are good for unlimited mods.

[RandysZL1]

Do you have to change the belt with either high or lower pulley?

[CRTZL1]

Originally Posted by RandysZL1

Do you have to change the belt with either high or lower pulley?

upper pulley yes, lower pulley no with a 5 percent, anything 10 and higher yes...

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[JDP Sales]

Originally Posted by RandysZL1

Do you have to change the belt with either high or lower pulley?

You'll have to swap out the belt with any combination other than a 5% lower damper.

Best regards,

Tyler
888-308-6007

[Six.Two SC]

With a rotofab and 10% lower pulley, no tune but using torco, would I still need aftermarket injectors?

[CRTZL1]

Originally Posted by Six.Two SC

With a rotofab and 10% lower pulley, no tune but using torco, would I still need aftermarket injectors?

People will say no, others will agree But you should change the injectors whenever you increase boost.. period!!
There are some who rather run at 5 percent capacity left in there duty cycle... cause they don't wanna spend the money or time.. I'm not one of them.

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[Six.Two SC]

Originally Posted by CRTZL1

People will say no, others will agree But you should change the injectors whenever you increase boost.. period!!
There are some who rather run at 5 percent capacity left in there duty cycle... cause they don't wanna spend the money or time.. I'm not one of them.

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Is there any negative effects with running with 5% left on the duty cycle?

[CRTZL1]

Originally Posted by Six.Two SC

Is there any negative effects with running with 5% left on the duty cycle?

Again I feel added boost should require new injectors Plain and simple... but with the 5 percent I think you'll be fine, Maybe even so with the 10 ...but me I like peace of mind.
That and who ever stops at just doing a 5 percent lower when Modding.. most people continue to mod... so I say Why not just do it now and be safe..
I will say people who have just done headers, intake and ported tb have seen duty cycles almost maxed out on the stock injectors.... so I ask what do you think boost is going to do? ..........
As far as negative effects with running that close to Max out I really don't know but I would say no


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[CRTZL1]

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