Chris, please post a graph of a gtx3582 and a gt3582 on low boost with 93 octane. Do you have any with approx 10-15psi? I want to see if it does flat line. A graph that is spread out with better resolution would be better too. Evans uses a graph similiar to a dynojet so I know it can be done.

If the flow threshold has been reached at 7k with 93 oct why would you even offer this turbo in the first place?! If you think it is because of the fact that I am on 93 octane and not e85, then that should have been brought up when I purchased this turbo. Actually, im pretty sure I thoroughly explained my setup to a T when I ordered.

Just like the sos sc stage 1 kits for 00-05 cars, you do not sell them with the n1200 because the rrfpr does not handle the flow of the blower, so you only sell the stage 1s with the n1220. Why would you sell the 3576 if it reaches its flow threshold at 7k on an engine that is famous for its high rpm power and flow range? My only assumption is that I was the first to get this turbo and test it.

So far I have not been able to justify the 700 dollar option to get the 3576 over the basic 3076. Im still interested in converting to a 3582 but I sure am not going to be the guinea pig again.

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This is the challenge we face daily, isn't it? We cater to a market and customer base that has a wildly varied degree of experience and knowledge. We hear constantly that our product pages inundate the reader with too much detail and information. Compare this page with any other vendor's (many of whom sell a turbocharger system with a five sentance paragraph). We have tried to provide as much detail and education to the potential customer with our alienating others. That being said, generalizations can and do help us at this task. We're happy to share more technical detail with those that seek it out.

Understand our interest is not recommending the setup that will push the engine to the nth degree of safety. We prioritize long term reliability over short term satisfaction of marginally more power at the expense of reliability. Like an OEM, we factor in considerations of a dynamic environment an engine in a street car will live in including fuel quality, fuel system performance, temperatures, etc. and pad our recommendations with this.

 

I think the selling point of this kit is that it fits and is pretty simple.

hell the full race efr kit I just did spools the efr7670 only about 4-500 rpms later but makes 50hp more only 12psi and carries out to 9500 rpms very well. But you have to redo the a/c lines, build a heatshield, etc.

The question for the customer is, .. do you want to give up a few hp to have something that fits or do a little extra work, spend a little extra $ to work around the "fit" of a kit that makes more power.

A divided t3 or evo8 is never going to break any power records.... ever

 

I would like to know why they would pick a turbo designed for a 7000 rpm top end also. I think the vast majority of people buying the kit dont spend 95% of their time at a track. Forget about fuel here for a minute. There are kits out their that make power all the way to redline without race gas. I think everyone would like to see what the OP would make with the current turbo vs the 82mm version. I personally would gladly give up 500rpm lower spool up to make power all the way to redline.

Show us the data of the two types you say you offer. Let customers have the ability to choose what they want.

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Sounds like you guys were looking for a unicorn and got a dose of reality...

 

^What he said.

I'm not sure what the big problem is. Sure it doesn't have the big top end some other kits have (and if the OP was promised otherwise then that sucks), but it shouldn't be a huge surprise after just looking at the kit. Also, it's funny how people say the power "falls off" at redline. Just because the torque curve isn't flat all the way to redline doesn't mean it falls on its face past 7K.

 

Are there any Dyno charts of this turbo kit with the gtx3582r on pump gas at the 14psi boost level?

 

I agree. Would people be happier if it took all the way to redline to make it's max power? Like a supercharger? If wanting around 400whp this kit would be perfect. Make the max power a couple thousand rpms sooner and hold it to redline.

 

hi Dustin --

Chris here. As you may remember, we did not list the GTX3576R until you requested it. When you placed the order, we spoke about why we did not list it (I do not feel the benefit warranted the price for 99% of our customers - and didn't want yet another option to confuse customers). I was very upfront with you that we had not tested this specific turbocharger, and that I felt it was only beneficial for higher pressure applications. You knew this, and accepted an additional discount I offered to try this turbocharger which we agreed we would pay you when dyno results were posted. You've since received the payment we sent for this. The turbocharger at the pressure ratio you're using did exactly what it was designed to do.

Frankly, I didn't realize that you were so unhappy with the product - based on our prior conversations, you seemed pretty excited. Personally, I'm very excited about the performance of this system because it accomplished our goals, and delivered (more than) the power that we advertised. The drivability of the system with such fast boost response I think is awesome! Compare it to the other GTX3576R dyno posted a few pages back from another system - your kit is responding a full 1000 RPM sooner. That's awesome! Bare with me, I get really excited about how this system performs - and have a system on both our street and race cars.

I know you've been a long time user and supporter of our products. I really want to make sure you're happy with your purchase, and will call you today to follow up with you to see what we can do to make you a continued ScienceofSpeed fan.

-- Chris

 

Please do not be confused. The GTX3576R is not our default turbocharger. Our default turbocharger is the GT3076R and our most popular option is the GT3582R.