SOS TS Max Turbo Kit Build Thread
10-23-2013, 11:47 AM
#343
From what I have seen there really isnt much difference in the two turbo's but the 3582r makes more top end I think they spool about the same though.
10-23-2013, 11:55 AM
#344
Originally Posted by ScienceofSpeed' timestamp='1382552602' post='22842529
[quote name='RAIN H8R' timestamp='1382552121' post='22842517']I know there is no advantage as the billet wheel will not shine at low boost. I was more of less asking for the x or non x 3582 at low boost because reguardless they will share similar plots.Do you have any graphs for the other customers who ordered 3576 turbos? If so please post those up also.Sent from my Samsung Galaxy S4
[/quote]
Why do you say that? Personally, I think the GTX3576R is my ideal turbo for this setup. Will the 3582 make more power? Yes. Will it spool slower and have slower transient response? Yes. It's pretty simple physics. THe 3576 has a better wheel size match creating a better blade speed ratio which improves turbine efficiecy making it spool faster. The 76mm compressor wheel is smaller diameter and lower weight than the 82mm compressor wheel resulting in significantly less rotational inertia which again improves transient response. I'd take the extra area under the torque/power curve and improved response over a little more peak HP.
10-23-2013, 11:56 AM
#345
I think looking at dynos from boostaddict's car and the first ones they posted on the site, people should've definitely got an idea that this kit won't make the peak numbers that a bunch of other kits make. The answer to everyone's questions is just look at the torque curve, it's VERY similar irrespective of what turbo is used. That ought to tell you something. It does make me wonder to what degree the divided housing chokes the top end..
10-23-2013, 12:20 PM
#346
Originally Posted by RAIN H8R' timestamp='1382541145' post='22842056
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.
Sent from my Samsung Galaxy S4
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.
Sent from my Samsung Galaxy S4
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
I am using the same turbo (undivided though). I am at 14psi, but on E85....def an apples to oranges comparison.
Not sure if I'm spooling 1000rpms later....I'm hitting the same torque figure 500rpms later, but mine keeps climbing.
I am also seeing torque start to drop off around 7000rpm, but honestly I cannot feel it drop off
10-23-2013, 12:28 PM
#347
Former Sponsor
Yes - your curve appears to have torque nose over at 5200. Dustin's is 4200, about 1000 sooner. Regardless of the fuel use, the general shape of the torque curve explains the airflow dynamics in the engine. This is an advantage of the twin scroll design, which was one of the factors is our design criteria.
10-23-2013, 12:32 PM
#348
Former Sponsor
Why do you say that? Personally, I think the GTX3576R is my ideal turbo for this setup. Will the 3582 make more power? Yes. Will it spool slower and have slower transient response? Yes. It's pretty simple physics. THe 3576 has a better wheel size match creating a better blade speed ratio which improves turbine efficiecy making it spool faster. The 76mm compressor wheel is smaller diameter and lower weight than the 82mm compressor wheel resulting in significantly less rotational inertia which again improves transient response. I'd take the extra area under the torque/power curve and improved response over a little more peak HP.
