He351cw over S480 Compound Turbo Setup

[Thekid760]

What size piping did use on the cold side? 3.0" or 3.5"?


Misspelling courtesy of my fat fingers...

 

[Big Blue24]

3" for all charge air plumbing.

 

[Thekid760]

Copy thanks. My GTA4202 has a 3.5" discharge but want 3" for velocity and easy of fabrication. Ill have to find a 3.5-3" transition.


Great work will, looks good.


Misspelling courtesy of my fat fingers...

 

[Ghostman]

Copy thanks. My GTA4202 has a 3.5" discharge but want 3" for velocity and easy of fabrication. Ill have to find a 3.5-3" transition.


Great work will, looks good.


Misspelling courtesy of my fat fingers...

The v-band adapter I bought for my gt42 would accept a 3" pipe inside it or a 3.5" outside of it. Check racepartsolutions.com


Sent from my iPhone using Tapatalk

 

[90dodge]

So where would a guy find that cast hotpipe? I'm interested in it.

 

[madmikeismad]

Can you get a better picture of it?

 

[90dodge]

Just found it. Search cobra downpipe cummins.

 

[madmikeismad]

Just found it. Search cobra downpipe cummins.

I'm curious now if it would help me. I'm swapping from that s400 to a gated gt42, so the turbine housing is about 2" longer, and I'm afraid it will hit the firewall. I'd like a really good picture from the side to show how straight down it drops the primary.

 

[rjustman]

Piping from Columbia river? If so what's the radius on it?

 

[Big Blue24]

Made a couple passes at the track tonight, it's slowly but surely getting quicker each pass.

[ame="http://www.youtube.com/watch?v=HLmsO4AEtMg"]http://www.youtube.com/watch?v=HLmsO4AEtMg[/ame]

Closeup:

EGT gauge is peaking at 1800* shortly after the overdrive shift than comes back down to low 1700's by the end of the track. Probably need to add some water injection or possibly go up a size on injectors with a little less rack travel on the pump to cut back on injection duration. Still no where near the potential of the airflow on-hand from that big S480 bottom turbo.

 

[madmikeismad]

What does the truck weigh? I was trapping 12.7 at 110 @ 7500lbs with my 351/78 setup. You definitely have more power hiding somewhere.

 

[97rada]

Just found it. Search cobra downpipe cummins.

Get a part number?

 

[90dodge]

Don't know it. Just search that on ebay. They should have the part number on it.

 

[rham45]

https://www.google.com/url?sa=t&source=web&rct=j&ei=Og3pVMDRMMikoQTdrILYDg&url=http://m.ebay.com/itm/Cummins-3927862-Exhaust-PPE-Out-Outlet-Cobra-Head-Fits-C8-3-CM2150-6L8-9-More-/181607690521&ved=0CC4QFjAF&usg=AFQjCNGp2OSneH2RYn6ZhtyNqeEdhp9cmg
Is it this one?

 

[90dodge]

Yes that's it.

 

[Gasoline Sucks]

Nice job!

 

[Big Blue24]

Piping from Columbia river? If so what's the radius on it?

Yes, Columbia River and 4" radius on the 3" mandrel bends.

What does the truck weigh? I was trapping 12.7 at 110 @ 7500lbs with my 351/78 setup. You definitely have more power hiding somewhere.

I estimate my truck weight was 7400 lbs. My truck is running pretty clean, it needs more fuel to go faster. Luckily I can increase my injectors for minimal cost so I'll try that after getting my lift pump fuel pressure situation under control. I honestly think this turbo setup is good for 11.50 1/4 mile passes with proper tuning.

Get a part number?

3927862 is the part number and that ebay auction listed above is the correct part.

 

[97rada]

Thanks a lot man

 

[rham45]

What did you use to weld the piping? Also where did you get the t6 flange?

 

[Big Blue24]

Mig welder with mild steel wire, pre-heat on the cast, and post heat with propane torch for slow cool down. T-6 flange was sourced from eBay.