That's a tight bend off the turbo..
Might have been a good idea to move the turbo forward a bit..
Might have been a good idea to move the turbo forward a bit..
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1994 K3500 extended cab dually
- Thread starter n8in8or
- Start date
n8in8or
I never met a project I didn’t like
Yeah, in hindsight it would have been nice to move it. I also would have leveled the flange the turbo bolts to because the stock 6.5 angle makes drain clearance more difficult.
n8in8or
I never met a project I didn’t like
I’ve been waiting for downpipe parts, so one thing I did in the meantime was make the turbo drain. I cut off the tube from the block drain and welded a -10 AN weld fitting to it. I also got a -10 AN stub for the turbo. Finally I made a hose using the same -10 braided hose I used for the oil filter adapter and wrapped it in Design Engineering heatshield wrap.
And finally today, the thing I’ve been waiting for finally arrived: a 6.7 Powerstroke cobrahead. Since I was unhappy with how the 3” downpipe was turning out, I remembered the Cummins cobrahead that Fellowtraveller used to talk about and went down that rabbit hole. That piece is pricey and was going to take some modifying to make it bolt up to the marmon flange on the turbo. Then I stumbled on the unit for the Ferd. It’s cheaper and since it’s sheet metal, more feasible to do any necessary mods to. Time to get started and see if it works for me. Hopefully it does, because if the marketing is to be believed, there may be a performance gain using this.
www.enginelabs.com
And finally today, the thing I’ve been waiting for finally arrived: a 6.7 Powerstroke cobrahead. Since I was unhappy with how the 3” downpipe was turning out, I remembered the Cummins cobrahead that Fellowtraveller used to talk about and went down that rabbit hole. That piece is pricey and was going to take some modifying to make it bolt up to the marmon flange on the turbo. Then I stumbled on the unit for the Ferd. It’s cheaper and since it’s sheet metal, more feasible to do any necessary mods to. Time to get started and see if it works for me. Hopefully it does, because if the marketing is to be believed, there may be a performance gain using this.
Cobra Downpipe For Ford Power Stroke
The Cobra downpipe Ford designed for it's Power Stroke engine is a testament to simplictic design. It's simple and it works.
www.enginelabs.com
jrsavoie
Recruit
Looks nice, like everything else you doI’ve been waiting for downpipe parts, so one thing I did in the meantime was make the turbo drain. I cut off the tube from the block drain and welded a -10 AN weld fitting to it. I also got a -10 AN stub for the turbo. Finally I made a hose using the same -10 braided hose I used for the oil filter adapter and wrapped it in Design Engineering heatshield wrap.
View attachment 96051View attachment 96050View attachment 96049View attachment 96048
And finally today, the thing I’ve been waiting for finally arrived: a 6.7 Powerstroke cobrahead. Since I was unhappy with how the 3” downpipe was turning out, I remembered the Cummins cobrahead that Fellowtraveller used to talk about and went down that rabbit hole. That piece is pricey and was going to take some modifying to make it bolt up to the marmon flange on the turbo. Then I stumbled on the unit for the Ferd. It’s cheaper and since it’s sheet metal, more feasible to do any necessary mods to. Time to get started and see if it works for me. Hopefully it does, because if the marketing is to be believed, there may be a performance gain using this.
Cobra Downpipe For Ford Power Stroke
The Cobra downpipe Ford designed for it's Power Stroke engine is a testament to simplictic design. It's simple and it works.
View attachment 96044View attachment 96045View attachment 96046View attachment 96047
n8in8or
I never met a project I didn’t like
Thank you, sir!
n8in8or
I never met a project I didn’t like
I got the downpipe rework done and it turned out really well. I had to trim a bit off the cobra head to make it fit the space I had. Interestingly I found that the main body of it is double layer and at the outlet there were actually 3 layers of tubing at the junction. I cut the factory turbo flange off so I could weld the correct marmon flange adapter on. I also cut the bracket off that Ford had welded on. 
n8in8or
I never met a project I didn’t like
With the tight bend the cobra head allowed, I was able to step up to 3.5” diameter tubing. I used some 45 degree elbows and sections of straight to make a routing I was happy with. I have figured a tip out while making these pipes - I taped the joints together with masking tape to temporarily hold them together while trialing fitment. Once happy, I cut squares out of the tape at the joints and put a spotweld there. After I had one spot, the tape allowed me to make sligh lt adjustments to tubing alignment while also holding pretty securely. The technique worked well for me.
I got it all welded together. I cut the 3” portion of the marmon flange because it gained me a little more clearance and with the way it fit to the cobra head, the 3.5” option was a good fit anyway.
I got it all welded together. I cut the 3” portion of the marmon flange because it gained me a little more clearance and with the way it fit to the cobra head, the 3.5” option was a good fit anyway.
n8in8or
I never met a project I didn’t like
Final test fit before paint. Tons of heater hose clearance, which is nice and everything else fits nicely as well.
n8in8or
I never met a project I didn’t like
I finished up the modified mid pipe today, too. This is how much I had to jog the pipe around that brace under the cab to get clearances right, it was straight before….sheesh.
n8in8or
I never met a project I didn’t like
Next I started working on something I’ve been excited to get going on because I think it’s going to be really cool when it’s done.
I’ve been wanting to do some kind of a heat extraction system to help get the heat out from under the hood. I didn’t want to do anything in the hood because I didn’t want to deal with rain or snow falling in the engine bay, so that pointed me to fender mods.
I saw the typical universal vents, but I hoped to find something a little slicker. I was searching for an OEM option that would have a nicer finished look. I looked through a few ideas and landed on one that I thought would fit really well: 1970-81 Trans Am. I found a couple on eBay that included the sheet metal from the fender to make it easier to fit them in. Today I took a junk fender and did a trial fitment. It looks like it’s going to fit great, so tomorrow I’ll start playing with my good fenders.
And I also wanted to try to get more cold air into the intake, so I did some looking at NACA ducts. I found a small one that looked like it would fit. It’s tight, but I think it will work.
I’ve been wanting to do some kind of a heat extraction system to help get the heat out from under the hood. I didn’t want to do anything in the hood because I didn’t want to deal with rain or snow falling in the engine bay, so that pointed me to fender mods.
I saw the typical universal vents, but I hoped to find something a little slicker. I was searching for an OEM option that would have a nicer finished look. I looked through a few ideas and landed on one that I thought would fit really well: 1970-81 Trans Am. I found a couple on eBay that included the sheet metal from the fender to make it easier to fit them in. Today I took a junk fender and did a trial fitment. It looks like it’s going to fit great, so tomorrow I’ll start playing with my good fenders.
And I also wanted to try to get more cold air into the intake, so I did some looking at NACA ducts. I found a small one that looked like it would fit. It’s tight, but I think it will work.
ak diesel driver
6.5 driver
Cool, be interesting to see the results
n8in8or
I never met a project I didn’t like
I’m stoked. I think it’s going to be pretty rad, both functionally and aesthetically.
Having taken flooded roads at speed... The water coming off the front tire over the hood and overwhelming windshield wipers... This will have issues with water coming in. Maybe do a snorkel instead?
n8in8or
I never met a project I didn’t like
I appreciate the real world experience. I think I’ll be fine with what I’m envisioning. The chamber isn’t sealed, so water can drain. I will also be running an Outerwears sock on the filter that also keeps water out of the filter. I’m just trying to give fresh air an easier path to the vicinity of the filter.
What is the one at the front of the fender made of? Looks plastic, how ya mounting it?
n8in8or
I never met a project I didn’t like
Yeah, plastic. I was thinking I’d make a mounting ring with hidden studs to retain it to the fender.
n8in8or
I never met a project I didn’t like
Got the passenger side heat extractor in. I did a quick coat of black paint to make it look more representative of the finished product. I’m quite pleased. It’s going to need just a thin skim coat to make the body work perfect, so that also makes me happy. Once I have the fender mods done, I am going to have the fenders acid dipped to get all paint and rust removed and then have them e-coated through our supplier at work so everything is coated well for good rust protection.
MrMarty51
Well-Known Member
So the one on the RH side would feed outside air into the air filter intake snorkel of a truck with the stock air filter system ?
n8in8or
I never met a project I didn’t like
Oh no…I haven’t used a stock air box in years. I’m going to do another airbox like I did last time for this truck, but I think it’s going to have a different filter configuration this time.
Post in thread '1994 K3500 extended cab dually'
https://www.thetruckstop.us/forum/threads/1994-k3500-extended-cab-dually.48444/post-608175
MrMarty51
Well-Known Member
Yup, but for us with stock type of AF system that could create an even larger source of outside air directly into the AF snorkel.
I think ? ? ? ?
