Forced Induction Superchargers | Turbochargers | Intercoolers

4" downpipe vs. K-member clearance..

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Old Jan 14, 2007 | 12:44 PM
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Default 4" downpipe vs. K-member clearance..

Getting ready to begin fabrication on a front mounted single turbo installation. We are locating the turbo at the battery location and using 6.0L manifolds to get off the engine. I would really like to use a 4" downpipe off the turbo and thought I remember a few other members pulling it off. After we threw the SPOHN K-member, a mock-up block into the car I started to stuff pieces of 4" pipe in a few locations and it just looks tight everywhere. If I need to neck it down to 3" I will but wanted to exhaust (no pun intended!) all avenues before then!

What do you guys think?

Thanks

Howard
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Old Jan 14, 2007 | 01:07 PM
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Turbozone says they fit a 4"...OFI does 3.5"...both thru tubular kmembers
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Old Jan 14, 2007 | 02:28 PM
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Boy I'd love to see some pictures of it. Any links to any?

Thanks
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Old Jan 14, 2007 | 03:03 PM
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nope...just what they said
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Old Jan 14, 2007 | 04:03 PM
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I have a 4 inch dp in my new setup. You relocate the alt to top and it slides right threw. My setup is similar to OFI I have 4 inch all the way back too catback. it's really tight but fit really nice. Now if I have back preasure probs all I have to do is put a mufflex catback on if I choose.
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Old Jan 14, 2007 | 04:11 PM
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Oval pipe?

http://www.burnsstainless.com/OvalTu...valtubing.html

http://www.drgas.com/store/home.php?cat=8
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Old Jan 14, 2007 | 04:19 PM
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nope round. it's tight against the body also.
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Old Jan 14, 2007 | 04:34 PM
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i fit a 3.5 over a stock k member and with the motor shimmed up a tad...its possible..you just have to be smart about it.
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Old Jan 14, 2007 | 04:34 PM
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i actually had a 4 inch downpipe over the pedestal and had a foward swept header in there too.
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Old Jan 14, 2007 | 04:44 PM
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and that is with factory K member
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Old Jan 14, 2007 | 04:51 PM
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02ss,

What are you using for manifolds? Did you dump it out the drivers side? I can see that the 4" looks like it would go there....

I thought I had seen somewhere that someone had got it to dump out the passenger side but might be mistaken.

Thanks

Howard
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Old Jan 14, 2007 | 05:08 PM
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custom turbo headers very similar to OFI setup. should have all the hotside pipes back from coater this week or early next week. yes it goes down driver side. Nasty TA's goes down pass side but also uses turbo headers. I kept AC that was main concearn I live in the south it's hot as hell here. what is you email address I can forward you and email.
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Old Jan 14, 2007 | 05:14 PM
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Here are some pics of mine but we used motor plates.

https://ls1tech.com/forums/showthrea...19#post6239819
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Old Jan 14, 2007 | 05:29 PM
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Check at page 4 pics here:

http://psj.ls1tech.com/gallery/main....d=10&g2_page=4

Speed Inc. fabbed it all up.
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Old Jan 14, 2007 | 05:35 PM
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looks good john
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Old Jan 14, 2007 | 07:33 PM
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it can be pulled off.....

If i remember correctly, Tiago who has a TT trans am has both his turbo located on each side of the engine bay along with the downpipes in the same route you wanna go...and they are 4"...

Howard you prolly dont remember me but I was the kid who you talked to that has the Turbo 3.8 with HP tuners that i was looking to get dyno tuned. I have a LC-1 wideband to go along with my HP tuners 2.1 along with my laptop and the Innovative motorsports software. I had a schedual at your shop to get the dyno tune, but no one ever contacted me back to approve it. I really do need to get this thing up on the dyno to correct my MAF becaise on 10psi with a T70 im comming VERY close to maxing it out and i dont wanna end up in safe mode. I will try to schedual an appointment with you guys again in late spring after I get my methanol Hooked up along with my new performabuilt tranny....if you cant do it thats fine, the next closest guy that can do it is in new jersey.

Last edited by kidcamaro98; Jan 14, 2007 at 08:00 PM.
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Old Jan 14, 2007 | 07:40 PM
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Originally Posted by cablebandit
Turbozone says they fit a 4"...
I'm not sure if I would go just on that opinion.....

But PSJ did it and I think that Slowhawk is looking to make on to fit as well on a customers car.
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Old Jan 14, 2007 | 07:59 PM
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I do have 4" no prob down the Pass. side.... the motor is even lowered 2".....
No A/C and yes custom manifolds....
Here are some pic's.....







Kyle
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Old Jan 14, 2007 | 08:03 PM
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Originally Posted by kidcamaro98
it can be pulled off.....

If i remember correctly, Tiago who has a TT trans am has both his turbo located on each side of the engine bay along with the downpipes in the same route you wanna go...and they are 4"...

I will try to find his pics.

Howard you prolly dont remember me but I was the kid who you talked to that has the Turbo 3.8 with HP tuners that i was looking to get dyno tuned. I have a LC-1 wideband to go along with my HP tuners 2.1 along with my laptop and the Innovative motorsports software. I had a schedual at your shop to get the dyno tune, but no one ever contacted me back to approve it. I really do need to get this thing up on the dyno to correct my MAF becaise on 10psi with a T70 im comming VERY close to maxing it out and i dont wanna end up in safe mode. I will try to schedual an appointment with you guys again in late spring after I get my methanol Hooked up along with my new performabuilt tranny....if you cant do it thats fine, the next closest guy that can do it is in new jersey.
I remember now......we had a crazy year last year and where into too many projects. We have a few more guys on board so I can spend more time tuning and keeping the operation cranking. Call or E-mail when you get the meth and we'll get it in.

Regarding the 4"...... I can see that it will go through the drivers side pretty decent. Again any picts would be cool!

Thanks guys.
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Old Jan 14, 2007 | 08:22 PM
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Originally Posted by NA$TY-TA
I do have 4" no prob down the Pass. side.... the motor is even lowered 2".....
No A/C and yes custom manifolds....
Here are some pic's.....







Kyle
I wonder if the stock 6.0L manifolds make it harder to get by the passenger side.
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