Help me pick out my turbos!
Help me pick out my turbos! Hey all, Need some assistance in figuring out which set of turbos to best compliment my build.
Full weight 02 Trans Am. 100% a street car. This thing will likely never see the drag strip and if it does its only for fun. 6 Speed. Do not know Rear Gear yet, but am open to suggestions after the turbos are picked.
Will be a built(stock crank) MLRE 5.3 with 799 heads.
Huron Speed TT v3 T4 Kit
Twin Turbo CAM: 222/231 .602"/.598" 112+4
My goal is 850whp - Yes I know this could have been easily done with a single, however, I wanted the Twin Setup - Just a dream/goal for a long time. I do not mind having room to grow either.
I'd also like to go Ball Bearing.
I really appreciate all the help from you guys here at LS1 Tech. Ive been around a while and gone through quite a few changes to the car.
-Nick
Full weight 02 Trans Am. 100% a street car. This thing will likely never see the drag strip and if it does its only for fun. 6 Speed. Do not know Rear Gear yet, but am open to suggestions after the turbos are picked.
Will be a built(stock crank) MLRE 5.3 with 799 heads.
Huron Speed TT v3 T4 Kit
Twin Turbo CAM: 222/231 .602"/.598" 112+4
My goal is 850whp - Yes I know this could have been easily done with a single, however, I wanted the Twin Setup - Just a dream/goal for a long time. I do not mind having room to grow either.
I'd also like to go Ball Bearing.
I really appreciate all the help from you guys here at LS1 Tech. Ive been around a while and gone through quite a few changes to the car.
-Nick
If this isn't enough information, let me know what else would be needed. Really need to determine what turbos to purchase. Or maybe who to call to find out. So many options and brands and sizes.
A pair of 3071's
This is probably the most expensive, most reliable, to purchase authentic garret turbos from ATP.
The map is very flexible, you can see we are still on the map when the engine is making only 400 horsepower and coming up in boost (3-7psi range) is still very well located on the map. This is important on the street because the engine won't be making max power all the time.
Looks very good to me, the more I inspect it (twins) against a healthy 5.3 the more I like it.
This is probably the most expensive, most reliable, to purchase authentic garret turbos from ATP.
The map is very flexible, you can see we are still on the map when the engine is making only 400 horsepower and coming up in boost (3-7psi range) is still very well located on the map. This is important on the street because the engine won't be making max power all the time.
Looks very good to me, the more I inspect it (twins) against a healthy 5.3 the more I like it.
A pair of 3071's
This is probably the most expensive, most reliable, to purchase authentic garret turbos from ATP.
The map is very flexible, you can see we are still on the map when the engine is making only 400 horsepower and coming up in boost (3-7psi range) is still very well located on the map. This is important on the street because the engine won't be making max power all the time.
Looks very good to me, the more I inspect it (twins) against a healthy 5.3 the more I like it.
This is probably the most expensive, most reliable, to purchase authentic garret turbos from ATP.
The map is very flexible, you can see we are still on the map when the engine is making only 400 horsepower and coming up in boost (3-7psi range) is still very well located on the map. This is important on the street because the engine won't be making max power all the time.
Looks very good to me, the more I inspect it (twins) against a healthy 5.3 the more I like it.
each turbo good to 500
so theoretically two are good for 1000 horsepower.
15% generic losses gives us around 850rwhp
I see them supporting 800rwhp
You said 100% street car so the next size up is incomprehensible, given the nature of exact numbers (exactly 850 horsepower isn't nearly as important as anything else)
so theoretically two are good for 1000 horsepower.
15% generic losses gives us around 850rwhp
I see them supporting 800rwhp
You said 100% street car so the next size up is incomprehensible, given the nature of exact numbers (exactly 850 horsepower isn't nearly as important as anything else)
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What about the 3076r? It flows a few more pounds and would give some wiggle room. Guys run them on 2.0l 4 cyl but they are a little laggy on them. However you are at 2.65l per turbo so it should help reduce any lag...
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Joined: Mar 2007
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From: Saskatchewan, Canada - where arguing "DA" is for the slow and weak...
Not apples to apples... but our TT 4.8L is using ported stock GN turbos which are good to about 350-400hp each (depending who you ask). The cam is similar at 226/230 .605/.608 113+3. I have a target of 650hp at the crank, so there is a margin of error. Basically if one optimized tiny turbo can push a 3500lb car with a 3.8L to low-12s/high-11s at 111-113mph in good air, two should do a 4.8L just fine - and this is with a .63 AR turbine housing.
https://www.turbobygarrett.com/turbo...argers/gt3071r
Horsepower: 280 - 480
Displacement: 2.5L - 3.5L
https://www.turbobygarrett.com/turbo...argers/gt3076r
Horsepower: 310 - 525
Displacement: 2.0L - 3.5L
Based the two options proposed there is a definite benefit on the street to a smaller AR turbine housing, and both GT turbos have options in the .6 to 1.0 range. I'd argue that for street fun you'll enjoy the smaller turbine housing and smaller cold side.
But as suggested going a bit bigger leaves room for growth - is 850hp going to become 1000hp? Only you know that answer.
https://www.turbobygarrett.com/turbo...argers/gt3071r
Horsepower: 280 - 480
Displacement: 2.5L - 3.5L
https://www.turbobygarrett.com/turbo...argers/gt3076r
Horsepower: 310 - 525
Displacement: 2.0L - 3.5L
Based the two options proposed there is a definite benefit on the street to a smaller AR turbine housing, and both GT turbos have options in the .6 to 1.0 range. I'd argue that for street fun you'll enjoy the smaller turbine housing and smaller cold side.
But as suggested going a bit bigger leaves room for growth - is 850hp going to become 1000hp? Only you know that answer.
I'd like for it to be noted that basically I win. Lol ������ as I am the one that suggested precision. I'm sure the 5858's are great, I've just ran a lot of 6262's on an assortment of vehicles 4 & 6 cylinders and it's always been super healthy.