Want a nice aftermarket turbo that's not too bad on lag? Consider a Garrett 3071
Jun 23, 2006, 08:52 AM
#1
Want a nice aftermarket turbo that's not too bad on lag? Consider a Garrett 3071
In my never ending quest to make the car faster, I finally decided to stop using internally gated 16Gs. I had a TME, and its results were great compared to the stocker, but the top end power was lacking. To remedy this, I acquired a Vishnu Stage 2 kit a few months back. This is not the same ATP kit, as it retains the original Garrett hotside and uses a custom downpipe to accomplish this. FWIW, the ATP based kits we've dynoed are about 25-30whp lower than the Garrett ones on pump fuel and 50whp+ lower on race gas!
Realize these runs were completed on a Dyno Dynamics, so Dynojet and Dynapack nutswingers multiply the correction in accordingly.
Run #254 is 93 octane
Run #258 is 110 octane
Run #259 is 110 octane with a little less timing starting at 6000rpm and tapering off on its way up because I'm a chicken wuss.
Horsepower and torque
Boost and AFR
The graphs below are my current state of tune and was done by Shiv from Vishnu Performance when he visited for our dyno day at Dyno4mance last month. This is what happens when a professional maps your car instead of a learning hobbiest like myself.
A couple of months before, with me at the XEDE's controls, the car made 325whp on pump fuel. Shiv was able to eek 15whp more (using less boost) to hit 340whp.
The time in my sig was from a week before this tune at a local forum's day at the dragstrip, so it was just a conservative guess race gas map that I made. I really wanted to race at the event, but without being at the dyno, I didn't want to make any broad changes that could potentially mess something up. My end result then was conservative- what I'd assume was in the vicinity of 365whp or so. Basically, I took my 325whp pump map, added a couple degrees of timing up top, took the boost from 23-25psi, and very slightly leaned out the fuel globally from boost onset to the rev limiter.
Car has the following power mods:
Vishnu Cam Gears set at -2/0
Vishnu XEDE piggyback and XEDEflash
HKS 264 intake and 272 exhaust cams
Precision 680cc injectors
Walbro 255 Lph pump
Vishnu Stage 2 kit which consists of:
-Garrett GT3071R turbocharger (customers can opt for a GT3076R if they wish)
-Vishnu collar/adapter plate from OE manifold to turbo
-Vishnu lower IC pipe
-Vishnu turbo inlet pipe
-Vishnu Signature turbo-back exhaust w/custom DP section
I'm a little afraid to drag race on this new 28.5psi race gas map, because I don't know if the drivetrain will like it very much.
The car is an absolute missile on the new race gas tune! I couldn't be happier with the results, the fit and finish of the Vishnu kit, and the stock-like drivability. Thanks a ton, Shiv.
Stock intercooler, stock unported exhaust manifold, stock airbox, and OEM style paper filter.
Realize these runs were completed on a Dyno Dynamics, so Dynojet and Dynapack nutswingers multiply the correction in accordingly.
Run #254 is 93 octane
Run #258 is 110 octane
Run #259 is 110 octane with a little less timing starting at 6000rpm and tapering off on its way up because I'm a chicken wuss.
Horsepower and torque
Boost and AFR
The graphs below are my current state of tune and was done by Shiv from Vishnu Performance when he visited for our dyno day at Dyno4mance last month. This is what happens when a professional maps your car instead of a learning hobbiest like myself.
A couple of months before, with me at the XEDE's controls, the car made 325whp on pump fuel. Shiv was able to eek 15whp more (using less boost) to hit 340whp.
The time in my sig was from a week before this tune at a local forum's day at the dragstrip, so it was just a conservative guess race gas map that I made. I really wanted to race at the event, but without being at the dyno, I didn't want to make any broad changes that could potentially mess something up. My end result then was conservative- what I'd assume was in the vicinity of 365whp or so. Basically, I took my 325whp pump map, added a couple degrees of timing up top, took the boost from 23-25psi, and very slightly leaned out the fuel globally from boost onset to the rev limiter.
Car has the following power mods:
Vishnu Cam Gears set at -2/0
Vishnu XEDE piggyback and XEDEflash
HKS 264 intake and 272 exhaust cams
Precision 680cc injectors
Walbro 255 Lph pump
Vishnu Stage 2 kit which consists of:
-Garrett GT3071R turbocharger (customers can opt for a GT3076R if they wish)
-Vishnu collar/adapter plate from OE manifold to turbo
-Vishnu lower IC pipe
-Vishnu turbo inlet pipe
-Vishnu Signature turbo-back exhaust w/custom DP section
I'm a little afraid to drag race on this new 28.5psi race gas map, because I don't know if the drivetrain will like it very much.
The car is an absolute missile on the new race gas tune! I couldn't be happier with the results, the fit and finish of the Vishnu kit, and the stock-like drivability. Thanks a ton, Shiv.
Stock intercooler, stock unported exhaust manifold, stock airbox, and OEM style paper filter.
Jun 23, 2006, 10:16 AM
#3
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I can't really second the motion on the 3071.
I had one on my car, and it did not work all that great with my combination of parts. I ended up going to a 50 trim, which outperformed the 3071 in all areas: earlier spoolup, more topend, no surge.
l8r)
I had one on my car, and it did not work all that great with my combination of parts. I ended up going to a 50 trim, which outperformed the 3071 in all areas: earlier spoolup, more topend, no surge.
l8r)
Jun 23, 2006, 10:42 AM
#6
Glad you got everything worked out, man. Now that you've had a chance to live with it for a while, I'm curious what you think of the greater lag for daily driving? I get really tempted to go for a stage 2 kit myself, but then I become unsure because my car will probably never see race gas. Anyway, congrats and enjoy!
Jun 23, 2006, 10:44 AM
#7
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The 50 trim spooled up about 200 rpm earlier than the 3071. I lost that advantage when I added the AMS VSR intake manifold into the mix, so currently my spoolup is about the same as it was with the 3071. On the street the 50 trim spools as follows:
3rd gear: spoolup begins at ~3500 rpm, full boost at ~3900 rpm
4th gear: spoolup begins at ~3400 rpm, full boost at ~3800 rpm
5th gear: spoolup begins at ~3200 rpm, ...and I haven't had the chance to let it get to full boost yet in 5th
It should also be noted that all of my mods have been geared towards topend power. Other than camgear settings, no effort has been made to aid spoolup.
l8r)
3rd gear: spoolup begins at ~3500 rpm, full boost at ~3900 rpm
4th gear: spoolup begins at ~3400 rpm, full boost at ~3800 rpm
5th gear: spoolup begins at ~3200 rpm, ...and I haven't had the chance to let it get to full boost yet in 5th
It should also be noted that all of my mods have been geared towards topend power. Other than camgear settings, no effort has been made to aid spoolup.
l8r)
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Jun 23, 2006, 10:50 AM
#8
FWIW I am getting the same peak boost numbers on the street that ludi is seeing with his 50 trim with my 2.3+3076 22 psi and peak torque at 3900 rpms, my numbers on 20 psi 93 octane pump were 380 360 on a dynojet, the motor was brand friggin new on the dyno, I expect it to be making 15-25 more whp now.
Scorke
Scorke
Jun 23, 2006, 10:55 AM
#9
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Originally Posted by Ludikraut
Here's the graph comparing my 3071 to my 50 trim setup. Same level of tune (21psi, 93 oct), same dyno, a few days apart.
l8r)
l8r)
Jun 23, 2006, 10:57 AM
#10
It's not that, it's just that whoever tuned him didn't try to make the graph look prettier by using smoothing. Go look at dynoflash's graphs that he posts vs say a turbotrix or topspeed or ams graph, one has much much more detail and variaton vs the number.
Al might as well use a sharpie to show your graph when you leave.
Scorke
Al might as well use a sharpie to show your graph when you leave.
Scorke
Jun 23, 2006, 11:09 AM
#11
Originally Posted by Ludikraut
I can't really second the motion on the 3071.
I had one on my car, and it did not work all that great with my combination of parts. I ended up going to a 50 trim, which outperformed the 3071 in all areas: earlier spoolup, more topend, no surge.
l8r)
I had one on my car, and it did not work all that great with my combination of parts. I ended up going to a 50 trim, which outperformed the 3071 in all areas: earlier spoolup, more topend, no surge.
l8r)
Your kit was from a different company than mine. My 3071's output absolutely donkey punched yours on the same dyno from when you were here, so comparing them isn't based in reality. I could overlay them for EvoM to see the proof of that if you'd like.
From the looks of things in the new graphs you supplied, my VS2 kit still blows your 50 trim out of the water in all areas, and my car has a fully stock internalled engine minus headstuds and cams!
Wave your flag elsewhere, Markus. You're threadjacking by comparing nectarines to oranges.
