What would you rather have on your car? Please give a reason why you choose the product...

 

If I were purchasing today, I would go for the Stillen. On a stock engine, from my observations, this kit appears to be the safest. I really have been hard pressed to find user problems on it. I've had an Eaton before and never had a problem with it and torque curve is great. The comparitive negatives are: splicing into the harness, hood scoop, warranty only with certified installer. The HKS appears/appeared to be a really well done kit. Harness connections, underhood install, HKS typically = high quality. It is a little less known at this point and looks like items are still getting worked out.

 

Really??

https://my350z.com/forum/showthread....t=Stillen+Belt

https://my350z.com/forum/showthread....t=Stillen+Belt

 

REALLY!...Interesting how different people interpret different posts...

I read it and see someone needing help with an issue with low boost/performance and belt problems. Low boost is probably attributed to belt problems and the CATs. The CATS are not recommended with this SC, or the HKS for that matter. The belt problem is probably related to miss-alignment with the SC or the tensioner. Still not that difficult to solve. I had a similar belt problem on another car and had to router out some holes to get enough supercharger movement for a better alignment. Not ideal, but hey this is aftermarket.

Then of course you have the various chime ins: I heard this and that, and I had an issue once and blah, blah blah. I think you need to listen to some of these if they are trending, but not really that much here for a company that has been around for as long as they have. There are also some pretty positive remarks.

I don't bat an eye at this one...broken landings, melted pistons and broken off pulleys seem a little more scary to me...

 

Actually I have first hand experience. I have seen 3 cars at my shop that have had Stillen superchargers with belt problems among other things. One of the cars we did the install and he has since been to other shops with the same results.
The main thing I have a problem with other then the belt, boost, and alignment problems....Is the fact that it is a $6000+ upgrade(installed) that only produces barely over 300 Rwhp

 

well....I have HKS and am very happy with the performance, qyuietness, and relatively low heat generation. But.....look at my post on FI systems and the SES light. Turns out that on newer Z's, if your A/F ratio is out of a certain range (exact numbers unknown) it will set off the Service Engine Light. This will affect ANY FI system.

Anyone else have an FI system on a '04.5 or '05 model?

 

I appreciate that response because there is first hand data here. Do you know if the belt was miss-aligned on the cars you are talking about or are you stating that this is inherent to the design and no easy work around?
On the 300whp, I agree it is not that much, but is not that little either. But the question was between the stillen and HKS, where I believe the stillen offers more power across the spectrum, could be wrong, but they are close and similar. I am reading into the question that he is looking for stock application with minimal tweaking. Too me, he is asking about the right kits. If you want the big numbers you go turbo, but at what cost?...If APS told me that they could provide me the safety record stillen has at this point and would give me a three warranty with their stock kit, I would go with them and advocate that solution on hood, heat, upgradability...etc. Without that though, you probably better do the internals, higher pressure, boost spiking. If I'm off here someone speak up...I would like to be corrected. If I am on, you need to add those costs to the system and figure out your cost/hp, granted with the higher capabilities. FI is something I am looking at as well, but I have a FX35, so the increased torque is another real advantage with the weight of my car .

 

I appreciate that response because there is first hand data here. Do you know if the belt was miss-aligned on the cars you are talking about or are you stating that this is inherent to the design and no easy work around?
On the 300whp, I agree it is not that much, but is not that little either. But the question was between the stillen and HKS, where I believe the stillen offers more power across the spectrum, could be wrong, but they are close and similar. I am reading into the question that he is looking for stock application with minimal tweaking. Too me, he is asking about the right kits. If you want the big numbers you go turbo, but at what cost?...If APS told me that they could provide me the safety record stillen has at this point and would give me a three warranty with their stock kit, I would go with them and advocate that solution on hood, heat, upgradability...etc. Without that though, you probably better do the internals, higher pressure, boost spiking. If I'm off here someone speak up...I would like to be corrected. If I am on, you need to add those costs to the system and figure out your cost/hp, granted with the higher capabilities. FI is something I am looking at as well, but I have a FX35, so the increased torque is another real advantage with the weight of my car .

 

bump

 

I did not vote . But thanks for reminding me to update my Stillen thread.

 

Okay....can you tell me how to get an independently dyno proven 300rwhp without spending $6000 ( other than nitrous). And, I believe the Stillen produces 350 rwhp, not "barely over 300".