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Old 10-14-2013, 08:59 AM   #26
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Its all trade offs. The base turbos kick in crazy fast. You got the bigger ones that will do 1100+ and are making <700. A 3" exhaust will help a bunch though so don't be too worried.
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Old 10-14-2013, 09:36 AM   #27
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Ya, thats what I think also. Honestly right now its awesome the way it is. Im not worried at all.

The "only" problem i've had so far is getting someone to play with me once they hear my car :(

I've passed a turbo porsche and a ton of mustangs and a couple rice burners and not getting much love in getting someone to play LOL
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Old 10-14-2013, 12:45 PM   #28
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Quote:
Originally Posted by Levischilz View Post
Well a few things were playing into that graph. A little false knock was making it jump down. Things fit pretty tight and we thought they might be tapping/rubbing around that point. I was going to try alternate motor mounts later along with other goodies and will retune and see how it looks.

Also the car needs 3" exhaust for these turbo's, I would worry about it even less with the s251's but I think it would help even more with these. The exhaust and motors mounts will get done come spring. Already getting down to the 40's here.

I tried to play a little the other day when it was about 65 out was just going sideways lol

Also it would continue to build better imo with a .82 a/r as right now im running .63 which Kevin recommended I swap to the larger but since I already had the kit and was more wanting a street toy I wanted to see how the lower a/r would play on the street. Ill be running more in the mid band than upper on the street.

I was actually a little disappointed at the boost kick in, you can tell that they are there from 2k+ on the street but it does not get wild till about 3500+
I'm sure it's still a ton of fun.
I was actually saying I would want boost sooner, not more power.
All depends what you want,but most go too big because they think 1000whp will happen in the future. The kits don't seem to be any different.
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Old 10-14-2013, 12:49 PM   #29
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This is what I'm after.
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Old 10-14-2013, 01:38 PM   #30
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Quote:
Originally Posted by Levischilz View Post
I was actually a little disappointed at the boost kick in, you can tell that they are there from 2k+ on the street but it does not get wild till about 3500+
I saw that you installed the AEM Truboost EBC - did you/they set up the Spring Pressure (SPr) to get that boost up earlier? If so, what is the current setting for SPr?
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Old 10-14-2013, 01:43 PM   #31
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That is what the shop car graph looks like but much more of a torque spike down low. Went to 740ftlbs then dropped back down.
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Old 10-14-2013, 02:20 PM   #32
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This is what I'm after.
[IMG]
If you look at both graphs they are very similar in powerband.

Levischilz makes 500 ft lbs at 3400rpm
Unobtanium makes 500 ft lbs at 3200rpm

Levischilz makes 600 ft lbs at 3600rpm
Unobtanium makes 600 ft lbs at 34000rpm

I know I am racing dyno graphs here which I HATE, but it's not as big of a difference as you see. Those couple hundred rpm difference can be made up or equalized by different dynos on different days, etc.
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Old 10-14-2013, 02:41 PM   #33
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If you look at both graphs they are very similar in powerband.

Levischilz makes 500 ft lbs at 3400rpm
Unobtanium makes 500 ft lbs at 3200rpm

Levischilz makes 600 ft lbs at 3600rpm
Unobtanium makes 600 ft lbs at 34000rpm

I know I am racing dyno graphs here which I HATE, but it's not as big of a difference as you see. Those couple hundred rpm difference can be made up or equalized by different dynos on different days, etc.
Absolutely agree. Also agree that dyno's are not ideal comparisons, but both are dyno jet, and just meant having that 50-100 ft/lbs a few hundred rpm sooner is a lot more fun than 50 hp up top.
The graph posted is of a 6L LQ9(ls6 cam) with 25 year old technology Grand National stock turbos, at 9 and 12 psi. They are rated as 350hp turbos, and are really quite small. Point being, same exact size with the new wheel technology would be better all over.
What turbos are on the shop car? Those sound like a killer set-up.
Post up a vid of the car...would like to see that!!!
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Old 10-14-2013, 03:33 PM   #34
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Absolutely agree. Also agree that dyno's are not ideal comparisons, but both are dyno jet, and just meant having that 50-100 ft/lbs a few hundred rpm sooner is a lot more fun than 50 hp up top.
The graph posted is of a 6L LQ9(ls6 cam) with 25 year old technology Grand National stock turbos, at 9 and 12 psi. They are rated as 350hp turbos, and are really quite small. Point being, same exact size with the new wheel technology would be better all over.
What turbos are on the shop car? Those sound like a killer set-up.
Post up a vid of the car...would like to see that!!!
It's close to 100 up top. but I'm not counting. And that few hundred RPM sooner on a drift car might be ideal. Either of these setups on the street is way more than will be utilized fully. I do completely see your point and any little bit of widening the area under the curve is what the goal is, (whether or not it's ever usable).

Turbos on the shop car are identical to what the OP has.
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Old 10-14-2013, 03:47 PM   #35
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I have a video but it doesn't show anything but a black Camaro going down the track. Can't read the boards or hear it. Hopefully a better one pops up.

I do have a few good photos.
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Old 10-14-2013, 04:01 PM   #36
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It's close to 100 up top. but I'm not counting. And that few hundred RPM sooner on a drift car might be ideal. Either of these setups on the street is way more than will be utilized fully. I do completely see your point and any little bit of widening the area under the curve is what the goal is, (whether or not it's ever usable).

Turbos on the shop car are identical to what the OP has.
Yes, you are right. It's almost 100hp. That is a decent difference. If you are racing, I could see this being a big deal too.
That said, the almost 100ft/lbs difference at 3500 would be a ton of fun on the street.
Is the shop motor bigger, or cams?
The S256 would love more boost too. Anybody running your kit with a built motor? Should do 850whp pretty easy around 12-13lbs.
Anyway, love that blue on the C7. Those cars are putting down 450whp or so and more torque with just headers. I love that the v8's are finally embracing some technology!
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Old 10-14-2013, 05:03 PM   #37
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If Levi just bolted on dual 3" exhaust, it would spool several hundred RPM quicker too. And then factor in you could use smaller turbos than the big ones he got. You can really get a lot of power down low if you want it.
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Old 10-15-2013, 01:47 AM   #38
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Here is one of my pulls you can compare.
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Old 10-15-2013, 10:03 AM   #39
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do you have larger turbos than the other 2 people? If not why is your tq curve with the same kit so drastically different?
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Old 10-15-2013, 10:16 AM   #40
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he has the base kit if im correct. Which uses s251's and im on the s256's.
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Old 10-15-2013, 02:26 PM   #41
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he has the base kit if im correct. Which uses s251's and im on the s256's.
That doesn't make any sense. On the same dyno, why is it soft down low like that? Centris have made more under 4000...
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Old 10-15-2013, 04:04 PM   #42
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No loaded type Dynojet vs. loaded.
Boost controller adjustment plays a huge roll on how early the gates start to open. Someone posted a dyno here not long ago that had 600tq through an auto at 3400 on a bone stock L99.
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Old 10-15-2013, 04:23 PM   #43
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L99 stock with AGP base kit
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Old 10-15-2013, 04:52 PM   #44
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No loaded type Dynojet vs. loaded.
Boost controller adjustment plays a huge roll on how early the gates start to open. Someone posted a dyno here not long ago that had 600tq through an auto at 3400 on a bone stock L99.
The ones I'm referring to are all on ADM's dyno jet.
The boost controller I would consider part of the tune.
The dynapack one looks much better. The L99 builds better torque stock, so no surprise there I guess. And 11psi too.
700wtq must be incredible. Certainly won't need gears!!!
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Old 10-15-2013, 04:58 PM   #45
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The spool of most of the s200-56 and the 51mm seems slow, but probably faster on the street. Can anyone post what their high gear logs show on the street for boost at certain rpms?

I have twin S300 60mm with .91 a/r on an 6.0 LQ4 (equiv of iron LS2, slightly lower compression) and in high gear I get
3psi at 3000rpm
5psi by 3350rpm

My setup is non-intercooled and carbed, but that shouldnt matter much. My boost readings are under the carb. Im not running a boost controller and am running a pretty light spring. (making 8psi on them)

My S300 turbos have 68mm turbines and S200 turbos have 61mm turbines so you'd think the S200s would typically spool much faster.

I want faster spool and am looking at the 56mm S200 but not sure if it does spool that much faster according to these graphs, but my experience on dynojets in the past has been slower spool than the cars have acted on the street.

Like I said if anyone could look in their logs from street driving and see what boost you have by 3000rpm in high gear from a roll on from about 2000rpm, that would be very interesting!

Thanks everyone for posting all the details and graphs, the AGP kits look very nice.

Thanks!
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Old 10-15-2013, 05:47 PM   #46
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One of the things to also consider is boost vs. power. Most of these graphs aren't showing where boost is made, but rather showing where power (torque) is coming on. These changes can have more to do with engine setup, tune, and cam than the actual turbos.

You can have turbos make 10psi at 2500rpm, but your engine's natural torque curve isn't going to show that on a dyno graph.
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Old 10-15-2013, 05:50 PM   #47
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The ones I'm referring to are all on ADM's dyno jet.
The boost controller I would consider part of the tune.
The dynapack one looks much better. The L99 builds better torque stock, so no surprise there I guess. And 11psi too.
700wtq must be incredible. Certainly won't need gears!!!
So far we have done:

LS 376 AUTO 3200 STALL 9.0 COMPRESSION - BASE AGP KIT .58 AR REAL LAGGY

LS 417 AUTO 3600 STALL 10.5 COMPRESSION - BASE AGP KIT .58 AR A LITTLE LAGGY

LS 376 MANUAL STOCK WITH LS9 CAM - BASE KIT .58 AR A LITTLE LAGGY

LS 427 MANUAL 9.5 COMPRESSION LS9 CAM - SECOND TURBO UP .82 AR NOT LAGGY - WITH CUSTOM 2.5" TUBING TO THROTTLEBODY

LS 427 AUTO 9.75 COMPRESSION LS9 CAM - LARGEST TURBOS .82 AR(NOT FINISHED) WITH CUTOM 2.5" TUBING TO THROTTLEBODY

Overall we like the systems,just will continue fine tuning them to our liking
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Old 10-15-2013, 05:54 PM   #48
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One of the things to also consider is boost vs. power. Most of these graphs aren't showing where boost is made, but rather showing where power (torque) is coming on. These changes can have more to do with engine setup, tune, and cam than the actual turbos.

You can have turbos make 10psi at 2500rpm, but your engine's natural torque curve isn't going to show that on a dyno graph.
Anybody that's seen a pd blower graph would argue that I think.
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Old 10-15-2013, 06:20 PM   #49
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Anybody that's seen a pd blower graph would argue that I think.
I get what you're trying to say here, but natural torque curves of an air pump will play more of a roll in a torque graph than you may think. And other things to consider as well like surge for one example if you're getting a turbo to spool up too quickly.
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Old 10-15-2013, 06:38 PM   #50
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So far we have done:

LS 376 AUTO 3200 STALL 9.0 COMPRESSION - BASE AGP KIT .58 AR REAL LAGGY

LS 417 AUTO 3600 STALL 10.5 COMPRESSION - BASE AGP KIT .58 AR A LITTLE LAGGY

LS 376 MANUAL STOCK WITH LS9 CAM - BASE KIT .58 AR A LITTLE LAGGY

LS 427 MANUAL 9.5 COMPRESSION LS9 CAM - SECOND TURBO UP .82 AR NOT LAGGY - WITH CUSTOM 2.5" TUBING TO THROTTLEBODY

LS 427 AUTO 9.75 COMPRESSION LS9 CAM - LARGEST TURBOS .82 AR(NOT FINISHED) WITH CUTOM 2.5" TUBING TO THROTTLEBODY

Overall we like the systems,just will continue fine tuning them to our liking
So you're saying these kits are real laggy? I've driven three of these cars that were built here locally and laggy has never even popped into my head. Or are you just saying on your dyno they are laggy?
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