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Old 12-12-2010, 06:36 PM
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Garrett38R Turbo Question

I am creating my "box of goodies" for a rebuild once we get into the New Year. Since I am still new at this, I am looking for a little guidance on this Garrett 38R Turbo set-up.

The one I am looking at says it is comes with the 1.0 A/R Turbo housing, but I have read that I should go with the 1.15 A/R housing. Can someone elaborate on why?

I am looking to make this 7.3L somewhere between 400-500hp, still not sure.
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Old 12-12-2010, 06:40 PM
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If you want that much power why not go with a GT42r

The reason for the larger housing is cause you will get better top end with a larger ar housing with a hai slower spool
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Old 12-12-2010, 06:46 PM
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I looked at the GT42R but they are about $500 more and I'm not planning on heading for the 600hp mark. It probably makes more sense to go that route, but I am shooting that extra money towards a new HPOP.

Will the 1.15 satisfy what I am looking for, or can I get away with the 1.0 A/R?
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Old 12-12-2010, 06:51 PM
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I'm not the 7.3L expert a lot of people are, but I believe the 1.15 housing is recommended to prevent turbo surge. Also should help move the powerband up a little more. With the right setup the 38R should get you to 500 RWHP mark, give or take a few...
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Old 12-12-2010, 06:54 PM
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Quote:
Originally Posted by stroker08 View Post
I looked at the GT42R but they are about $500 more and I'm not planning on heading for the 600hp mark. It probably makes more sense to go that route, but I am shooting that extra money towards a new HPOP.

Will the 1.15 satisfy what I am looking for, or can I get away with the 1.0 A/R?
You will make alittle more power with a 1.15 housing and alittle lower EGT
Think about it this way smaller the AR hoising the faster the spool but looses topend and larger the hoising slower the spool but more power at the top
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Old 12-12-2010, 06:56 PM
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So pay the extra to go from the 1.0 A/R housing to the 1.15 A/R, or will the 1.0 get me there?

I am going to upgrade my HPOP, Injectors, Fuel delivery, and already put on a 5" exhaust. Have even thought about the tuning yet.
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Old 12-12-2010, 06:59 PM
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Sorry, goats - I was posting my quick response the same time you sent yours.

I think you answered my question; I will probably just get the 1.0 A/R as it comes since I do a lot of hauling in the Spring/Summer months - probably need the quicker spooling.
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Old 12-12-2010, 07:03 PM
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I haul with a 1.15 and notice no lag. That is with a van turbo. You are looking at a 38r ball bearing so you should be fine.

Go with the 1.15 you will like the lower EGTs and top end. prolly help with towing, pulling a big load up a 6% grade and your truck downshifts, well thats the top end power.
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Old 12-12-2010, 07:13 PM
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You guys know any good diesel shops around Cincinnati? Even within a couple hours away? Seems like no one around here wants to help work on these things, just want to sell the bling.
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Old 12-12-2010, 07:17 PM
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Putting a turbo on is a lot easier than you think. It is just a few bolts and can be done in as quick as an hour.
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