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09-21-2012, 05:10 PM | #126 | |
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That's rich coming from the guy comparing gt35's and 3071's and omitting boost data
Obviously it was a typo. If you examine the graphs you can see the 100oct is running a few more psi in the mid range, and is making more power on less boost up top. Assuming they're pushing the knock threshold of 93 on that particular setup, it says good things about the low mount setup.. Quote:
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09-21-2012, 07:18 PM | #127 | |
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Cory |
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09-21-2012, 07:50 PM | #128 | |
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09-21-2012, 07:56 PM | #129 |
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makes more sense. I agree, this is an amazing kit!
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09-21-2012, 08:38 PM | #130 |
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Chris is an engineer and not a marketing major. I don't think he begins with how to best market his products which isn't to say he doesn't think about it. I agree that some sort of better comparison data would help to plop down the bucks for this kit, but the design and testing are at least transparent which is more than I can say with other companies who use the term "testing."
Personally I would like to see a standard 3076 thrown on to compare to the other efi logic dyno runs. It would take out the effect of the gtx wheels on the spool and curve and at least allow some correlation between the reduced header volume. Chris these guys do have a point. The kit won't be cheap, so a bit more effort on the comparison data can help with skepticism. If the pricing were a lot lower I don't think the skepticism would be as great. |
09-21-2012, 10:10 PM | #131 | ||
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If the kit doesn't provide higher quality and beter performance vs similarly priced kits (and in some instances much more expensive kits), there's no point for us going into production. As simple as that. So far, a lot of data is pointing in that direction. We'll see. On the 3076 check out below... Although now that I'm thinking about it I can't recall if this was a GT or GTX and it was also catless :/ Quote:
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09-22-2012, 10:39 PM | #132 |
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Car people can be so funny.
"you need to do test xyz to satisfy the skeptics" as if the point hasnt already been pretty proven. Haters gonna hate. And if you cant grasp the concept that moving the turbo over 2 feet closer to the heads is going to do anything but good things, then I'm not sure any other "test" is going to help you. |
09-22-2012, 11:27 PM | #133 |
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is there pricing on this yet so you can sell this to me?
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09-23-2012, 01:10 AM | #134 |
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09-23-2012, 09:30 AM | #135 |
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OK so you have a bigger turbo with more lag and less power on less boost. The cars should be tuned to the same margin of safety given the same tuner was used. So for less out-of-pocket you get a bit less performance. We all have budgets so I can understand going this route. BUT...
The way the car is setup now is with the tial 0.63 A/R. It is an absolute BLAST on the street and autocross. Although, it is not the highest HP setup we've had on the car and this is something we will be going back to, the 0.82 A/R. Here's a plot from the first setup. It had a 44mm WG (now on 38mm), which I suspect was a bit sticky upon opening due to the torque dip you see as it reaches target boost, and it had the 0.82 A/R turbine housing. I know I know, it's not the same dyno and not the same tuner, but butt dyno confirms similar torque, but much more power up top. In fact with the 0.82 A/R we kept pushing the rev limit to 7.500RPMs until power started to taper down. The plots give a resemblance of this as well. For Max power and a car that would see road coarse duty I would without a doubt go with the 0.82 A/R housing or maybe even a 1.06 A/R. Plus we have the GTX3576 with the 0.63 A/R that Garrett tells me will spool like the 3071 with the 0.82 A/R, but make MUCH more power. Well see, still lots more testing to do! Another benefit to this kit is in its versatility. The ATP turbos we're seeing here in the comparisons have A/R 0.73 IIRC and that's it. So say you're running someone's rotated setup. You have to pull header, up-pipe, down pipe and replace all those gaskets, OR pull the turbo and deal with oil coolant lines plus still changing gaskets. With out kit it should take a lot less time and NO gaskets. I will be doing this in the next few weeks, but if it goes according to plan, it will be 3 V-bands and you can swap the housings. We'll see how smoothly this goes in the coming weeks, but for those running street/track tunes this can be a significant advantage to the kit. Maybe? While I REALLY enjoy street driving the car with the 3071 I'm not convinced yet that it's going to hit the sweet spot we are looking for, for this kit, on pump anyway. E85 and its a different story, but that's a debate for another day. My point is, this is a work in progress. I really enjoy sharing the info as we go and the feedback from the community. In the end if the kit isn't worth the price of admission, it won't go into production and I'll be able to enjoy it's marginally better performance all by myself |
09-26-2012, 06:50 PM | #136 |
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I'll definitely be watching this
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09-27-2012, 01:38 PM | #137 |
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Very cool setup! Have you experienced Higher water temps at idle? I would apply this to my dd so sitting at stoplights is a concern. I'm just wondering about heat soak for the radiator possibly because it's so close to the runners/collector? Can't really see how close they are from the pics.
I'd love to see some dyno numbers with built heads, a large 30r, and meth! Thanks and good luck with progress. Hopefully this will go into production. |
09-27-2012, 02:15 PM | #138 |
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I've been in gridlock passing through a couple cities with temps in the triple digits. The car handled it better than I did The fan cycles off/on just like the OEM setup. Coolant and IAT are so uneventful I don't even log them anymore
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09-28-2012, 06:04 PM | #139 |
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So no AC with this setup?
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09-28-2012, 06:54 PM | #140 |
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I had a universal condenser in there for a while and the compressor is still there. It was never hooked up. In the begining I was taking it apart often and ended up removing the condenser just because it was always in the way. It could go back in at any time. The only thing left to be done was make an adapter to go from the Suby lines to the universal condenser fitting. I tried searching for an off-the-shelf adapter, but can't seem to find one
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10-03-2012, 01:09 PM | #141 |
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Any idea on when the GTX3576-R will be fitted for testing?
Also any estimated ETA for production or it is still way to early? This looks like promising option to the current choices. Good work! |
10-03-2012, 01:45 PM | #142 |
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Working on the details for building the motor to handle the 3576. The dimesions of the 3576 are exactly the same as the 3071, so it should fit like a glove
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10-29-2012, 09:12 AM | #143 |
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Guys sorry for the delay on updates. I'm working on finalizing the details on the build. The engine will be built to handle more power than this kit will put out, with relaibility and rebuildability in mind. No performance enhancing will be done to the block/heads, besides stronger components, to assure we are only measuring kit performance.
In the mean time I'm still driving the car (a lot more than our 2012) and it's still a blast on the street. |
10-29-2012, 09:59 PM | #144 |
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Assuming that this isn't your daily driver, it seems cheaper to just let the current block go as to make the kind of power you're expecting requires a better fuel system. I think everyone here is smart enough to know that if the sleeves let go it's not going to be a problem with the kit itself.
I can't wait for the 3576 as I'll at least be able to see the delta from the 2 turbos since all else will remain the same. I'm really liking the gtx3071 in .63 though. |
11-02-2012, 12:59 PM | #145 |
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Chris, it was nice talking with you the other day and appreciate the fast responses.. I'm on board with this prototype setup and cant wait for the results of the 35r... i really hope this hits production... this makes me very interested as well and cant wait to see the results..
"Plus we have the GTX3576 with the 0.63 A/R that Garrett tells me will spool like the 3071 with the 0.82 A/R, but make MUCH more power." |
11-05-2012, 08:09 AM | #146 | ||
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On the engine I was on the fence for a while on this, but I'd rather play it safe and not have an engine failure on the dyno. The short block will be pulled inspected and put into the 2012 for another similar project (shhh, don't tell anyone), and a fresh sleeved block will be put into the 05 that will be made for ~800whp that it will likely never see. We plan on tearing it down ever 20K or so as I am testing some other secret stuff and want to check progress and the general health of the engine to avoid unplanned failure. I've considering a few option on fuel. I'm not overly concerned on 93 pump, but race gas and E85 will definitely requre something. Since the car will live on pump and only be tested on race/E85 we may just rig something temporary on the pump side of things, but I'm still thinking things through. In all honesty I really like the GTX3071-R (0.63 A/R) as a street only setup. OEM-ish drivability with a whole lot more go-go. The one downside (if you can call it that) is the throttle is much more sensitive to throttle inputs. Or as my wife puts it, an on/off switch. It took her some time to get used to gentle inputs on the throttle, wheras the 0.82 A/R had just enough lag where you could dip into it some and accelerate in a more predictable manner I too am really looking forward to the GTX3576-R results too Quote:
On the GTX3576-R, that's what garrett tells me. I've even gone back and said "are you sure?" more than once We'll see |
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11-15-2012, 05:42 PM | #147 |
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^ love this post.. I'm anxiously awaiting!
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11-16-2012, 07:23 AM | #148 |
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Thanks!
We're still driving and working up a plan for the build and turbo. In the mean time we're throwing around another idea for a different version of this setup improving the potential even more, but it's just an idea at this point so I don't want to tease anymore than we already have here. |
11-16-2012, 10:41 AM | #149 |
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Im sure this is a question for perrin, but would you think I could simply swap the turbo on my 30r old school (meaning not 3" at hotside) perrin turbo kit? to a 3576? for one to fit the piping, and if that worked, I feel bad swapping my pretty much brand new turbo, but that would be nice, is there any interchangable parts on the 3076? (ie, center cartridge, hotside, or compressor housing?
thanks |
11-16-2012, 12:59 PM | #150 |
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I'm mostly familiar with the GTX series, but I think the hot side you can put a different housing on (in this case the Tial). I've heard different things on the CHRA, but never confirmed one way or the other since we've only been using the GTX series. I do know for a fact the compressor housings are different, and not swapable.
My guess is that you could use that turbo with the Tial housing and if you sent us the compressor housing, to modify it for the inlet, you'd be good. Maybe |
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