Anybody running a K31 on a hypermax kit? - PowerStrokeNation : Ford Powerstroke Diesel Forum
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post #1 of 30 (permalink) Old 01-29-2009, 09:26 PM Thread Starter
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Anybody running a K31 on a hypermax kit?

I'm thinking about this as the next step. I like the S400, but already have the hypermax kit w/ a modded H2 w/ a 66mm wheel.

These are the questions that I have.

1. What were you running before the K31? H2? S300?

2. What kind of difference did you notice in the spool? Worse? Same? Better? And how much worse, same or better?

3. How much boost do you see w/ it and what kind of EGTs are you seeing?

4. Where does the K31 light? I notice that the modded H2 lights around 10psi Is the K31 stronger off the bottom, or does it come on a bit later?

4. Do you see any kind of surge? (I heard that it could surge while towing)

5. What other mods are you running? Fuel system? Injectors? Oil? ...?

6. What do you use the truck for? DD? Towing? Pulling? Drags?

7. What are your overall impressions of the K31? Dig it? Hate it? Would go back to the previous setup?

I'm really interested in this turbo, but I finally got the H2 tuned right and it runs pretty good. I'm just thinking "bigger and better"

I do use the truck a lot for towing heavy, so that is also another factor in my decision.

Thanks guys. I appreciate your input.

99 F350 CCLB
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post #2 of 30 (permalink) Old 01-29-2009, 09:29 PM
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Re: Anybody running a K31 on a hypermax kit?

Kainers was (still is but the truck is not running) running a K-31 on a H2e kit. He swapped out the QSSB for it. BUT, I think he is also running the QSSB exhaust housing still. Might shoot him a PM.

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post #3 of 30 (permalink) Old 01-29-2009, 09:33 PM Thread Starter
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Re: Anybody running a K31 on a hypermax kit?

Thanks. I'll shoot him a PM.

99 F350 CCLB
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post #4 of 30 (permalink) Old 01-29-2009, 11:03 PM
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Re: Anybody running a K31 on a hypermax kit?

Get ahold of Dave at Swamps, I would get a Sledgehammer (s300) or a BMFSledghammer (s400) that will bolt to your H2E kit,

The K31 in my opinion is not a very good charger, The Shaft is way to small and i was not impressed with the performance it gave on my truck, I put it on in place of a sledgehammer(mine was out getting rebuilt) for schied of 07 and it felt like i lost 75hp

just my .02

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post #5 of 30 (permalink) Old 01-29-2009, 11:09 PM Thread Starter
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Re: Anybody running a K31 on a hypermax kit?

Quote:
Originally Posted by moremph View Post
Get ahold of Dave at Swamps, I would get a Sledgehammer (s300) or a BMFSledghammer (s400) that will bolt to your H2E kit,

The K31 in my opinion is not a very good charger, The Shaft is way to small and i was not impressed with the performance it gave on my truck, I put it on in place of a sledgehammer(mine was out getting rebuilt) for schied of 07 and it felt like i lost 75hp

just my .02

Travis
I thought that the S400 sat too low in the valley. Are you still running the BMF?

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post #6 of 30 (permalink) Old 01-29-2009, 11:10 PM
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Re: Anybody running a K31 on a hypermax kit?

i 2nd skav. going to need a turbo in the future and deciding what one i want

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post #7 of 30 (permalink) Old 01-29-2009, 11:13 PM Thread Starter
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Re: Anybody running a K31 on a hypermax kit?

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Originally Posted by 99 7.3 View Post
i 2nd skav. going to need a turbo in the future and deciding what one i want
Looks like we are running similar setups. Let's see what everybody has to say.

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post #8 of 30 (permalink) Old 01-29-2009, 11:18 PM
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Re: Anybody running a K31 on a hypermax kit?

Quote:
Originally Posted by moremph View Post
Get ahold of Dave at Swamps, I would get a Sledgehammer (s300) or a BMFSledghammer (s400) that will bolt to your H2E kit,

The K31 in my opinion is not a very good charger, The Shaft is way to small and i was not impressed with the performance it gave on my truck, I put it on in place of a sledgehammer(mine was out getting rebuilt) for schied of 07 and it felt like i lost 75hp

just my .02

Travis
Boy do I hope your right on that assessment.

To the OP I have a K31 from IIS on the wife's truck and it has performed great for a journal bearing turbo, as much as I like my GTR BB turbos I was pretty impressed with the spoolup and performance it gave although I always felt the truck was down on power for what it had in it.
I'm selling the kit in the next month to go to a Gt??R to see if the topend power comes around.
seems a snot nosed kid in KY needs a spankin

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post #9 of 30 (permalink) Old 01-30-2009, 02:20 AM
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Re: Anybody running a K31 on a hypermax kit?

how much power difference is there between a std h2e an a mod one.. ??
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post #10 of 30 (permalink) Old 01-30-2009, 02:26 AM Thread Starter
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Re: Anybody running a K31 on a hypermax kit?

Quote:
Originally Posted by powerstrokemike View Post
how much power difference is there between a std h2e an a mod one.. ??

Between the s300 (62mm) & the nodded h2 (66mm) I went from 35psi max (s300) to 47-8psi max (modded h2)

It was noticable!

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