Garrett GT47-88 with .96AR on 408 Opinions
05-20-2014, 06:25 AM
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Garrett GT47-88 with .96AR on 408 Opinions Building a 408 LS with TU2 Cam and stock 317's (minus springs retainers etc) and a Edelbrock Victor intake elbow and TB. Running Holley Dominator Injection. Have a Garrett 47-88 with a .96AR.
Question is do you more experienced guys think I should swap to a larger AR or try this one first. Or can it even be done on this turbo? It is a T6. I am shooting for 1000RW HP Also I have 4:11 gears and was thinking 3:55's 275 drag radial. Thanks for any help.
Michael
Question is do you more experienced guys think I should swap to a larger AR or try this one first. Or can it even be done on this turbo? It is a T6. I am shooting for 1000RW HP Also I have 4:11 gears and was thinking 3:55's 275 drag radial. Thanks for any help.
Michael
05-20-2014, 09:24 AM
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Yea that was my other thoughts as well. I am only running 1/8 mile and should stay around 7K at the top end. Compression will be low on this motor with 9:1. Running the JE dish with 72 CC chamber 317's.
05-20-2014, 11:16 AM
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You will have back pressure issues which could lead to all kinds of issues. I was in the same boat. Cheaper/easier to get a different turbo. You def want the highest gears you can run to load the turbo harder. If you do run the gt4788, at least meter the BP so you can see if its getting out of control, save it from a melt down.
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05-20-2014, 12:55 PM
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From what I remember the turbine wheel is kind of the problem even with bigger a/r housings but it seems the bigger housing would be cheap to try. I would think 1000 rwhp would be doable either way but if you want to keep back pressure in check go with a bigger turbo like a GT50 to begin with. I think most turbo places would recommend the GT50 for bigger cubes as well.
05-20-2014, 02:22 PM
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Yea I was looking at the GT-50 also. That may be an option. Where I work we move Natural Gas in pipelines. We use compressors to boost line pressure. 15K HP coupled to a Rolls compressor. That thing goes into compressor surge at a certain load percentage, but under that it makes a lot of power and moves a lot of gas. So I am thinking if this turbo GT47-88 is kept in a sweet spot, like under so many RPMs or load, that it may work. I don't know. Maybe just go GT-50 and be done.
Thanks for the help guys. Going to pick up short block tomorrow, so wheels are turning now. Would like to drive this to track and run high 5's in the 1/8th. Thats my plan anyways.
Michael
05-20-2014, 02:54 PM
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Yea LOL Kinda like "put a bigger cam in it and go real fast" Ha.
Yea I was looking at the GT-50 also. That may be an option. Where I work we move Natural Gas in pipelines. We use compressors to boost line pressure. 15K HP coupled to a Rolls compressor. That thing goes into compressor surge at a certain load percentage, but under that it makes a lot of power and moves a lot of gas. So I am thinking if this turbo GT47-88 is kept in a sweet spot, like under so many RPMs or load, that it may work. I don't know. Maybe just go GT-50 and be done.
Thanks for the help guys. Going to pick up short block tomorrow, so wheels are turning now. Would like to drive this to track and run high 5's in the 1/8th. Thats my plan anyways.
Michael
Yea I was looking at the GT-50 also. That may be an option. Where I work we move Natural Gas in pipelines. We use compressors to boost line pressure. 15K HP coupled to a Rolls compressor. That thing goes into compressor surge at a certain load percentage, but under that it makes a lot of power and moves a lot of gas. So I am thinking if this turbo GT47-88 is kept in a sweet spot, like under so many RPMs or load, that it may work. I don't know. Maybe just go GT-50 and be done.
Thanks for the help guys. Going to pick up short block tomorrow, so wheels are turning now. Would like to drive this to track and run high 5's in the 1/8th. Thats my plan anyways.
Michael
05-20-2014, 05:28 PM
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Lol, yeah. That turbo has enough in it to accomplish what you want. You may need to step up to the bigger turbine housing to do it. Its important to keep in mind that turbine flow is asymptotic in nature. It doesn't care what size engine its bolted to...it's going to peak at a certain mass flow regardless. A bigger engine breathes easier through a bigger turbine/housing...but so does a small engine.
Ok Trans2000am I sure will.
