T4 turbo options - Ford Powerstroke Diesel Forum
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post #1 of 11 Old 01-04-2017, 01:08 PM Thread Starter
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T4 turbo options

Curious as to if a 300 or 400 series T4 is the best option for an OBS?

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post #2 of 11 Old 01-04-2017, 01:18 PM
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Depends on what your doing. Just a daily driver or tow rig I say s300.
Drag racing or sled pulling s400


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post #3 of 11 Old 01-04-2017, 01:25 PM
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What size injectors and supporting mods will determine what size turbo (how much air) you will need? YOU need to decide how the truck will be used and how much hp you are going for. Then check if your funds support that reality?

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post #4 of 11 Old 01-04-2017, 01:49 PM
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Like @MeTo said, it depends on what you want and how much you have to spend. Daily driver, race truck, tow heavy? Break out the wallet. You're looking at spending some money either way.

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post #5 of 11 Old 01-04-2017, 04:50 PM
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Quote:
Originally Posted by MeTo View Post
What size injectors and supporting mods will determine what size turbo (how much air) you will need? YOU need to decide how the truck will be used and how much hp you are going for. Then check if your funds support that reality?
Yes.

The main determinant would be injectors and overall HP goal. Everything needs to work hand in hand. For 99% of 7.3L guys a 300 series turbo would be the choice, However, if you are looking for big HP numbers and not wanting to DD the truck, you may want to go 400 series.
post #6 of 11 Old 01-04-2017, 06:17 PM
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My OBS is set up with 250/100s and a s366. It made 530 hp and 948 lb/ft turning 37s. It's a great daily driver too. So OP you can make power with a 300. It will cost you an arm and leg though.

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post #7 of 11 Old 01-04-2017, 07:35 PM
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Lots of happy 7.3 owners after installing a SXE. I run the S369SXE with 350/200s. It is the largest 300 frame turbo you can get. The only tune is use has fueling pulled back to the mid 300hp range. Spools up great with the 1.0 housing. Lots of options on the SXE line up. The 364.5sxe and 366sxe are very popular on the 7.3 platform. Swamps built a 7.3 for a customer that put over 700 on thier engine dyno with a single S369.

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post #8 of 11 Old 01-05-2017, 07:07 AM
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SXE is an impressive line. A friend made 648 I think at the wheels with 275/100s and s369. Spooled very quickly with no lag, was more than good for a daily.

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post #9 of 11 Old 01-24-2017, 01:32 PM Thread Starter
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If I bought a T4 kit for an S400 series turbo, would it be possible to use some of it for an S300 series if I go that direction? If so, what parts?
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post #10 of 11 Old 01-24-2017, 04:40 PM
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Quote:
Originally Posted by newobs View Post
If I bought a T4 kit for an S400 series turbo, would it be possible to use some of it for an S300 series if I go that direction? If so, what parts?
Should be able to use just about everything. May depend on who built the kit though. I would call them and confirm. The intake/compressor boots may be a little different.
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