6.2 headers

nyoffroad · Jul 7, 2018

Any one ever use a weld your own header kit to make a set of 6.2 headers? I think headers would really wake the old girl up.

Iceman3005 · Jul 7, 2018

A turbo will do a lot more then headers. Felt likw adding a turbo doubled the power!

Sent from my SM-G928P using Tapatalk

ken · Jul 16, 2018

Stan's Headers carries them Their part number is 164. They sell for $668.

164

82-87

Pickups (4WD) Diesel

6.2L

9,16

668.00

Sharecropper · Jul 16, 2018

Yeah I’ve come full circle on them thar turbos. I wish I had all that money back. My P400 is going to be NA and run cool. I have a set of those Stsns headers on the way and they should be here next week. Decided to go ahead and ceramic coat in a titanium color.

Karl kostman · Jul 16, 2018

Maybe this is just ignorance on my part but that motor doesnt make enough power to need headers, I would think you need to start changing things a lot earlier than exhaust, lets start with cam, exhaust ports, exhaust valves, intake assembly then possibly headers? There are many improvements needed before a set of headers would make any difference, IMHO
Karl

Sharecropper · Jul 17, 2018

Karl kostman said:
Maybe this is just ignorance on my part but that motor doesnt make enough power to need headers, I would think you need to start changing things a lot earlier than exhaust, lets start with cam, exhaust ports, exhaust valves, intake assembly then possibly headers? There are many improvements needed before a set of headers would make any difference, IMHO
Karl

Hey Karl, evidently you don’t know about the P400 engine I’ve got coming?

LT67 · Jul 17, 2018

Sharecropper said:
Hey Karl, evidently you don’t know about the P400 engine I’ve got coming?

I think he was referring to a 6.2....

Btw, what oil pan are you using with the p400? And what are the power numbers n/a?

Sharecropper · Jul 17, 2018

LT67 said:
Btw, what oil pan are you using with the p400? And what are the power numbers n/a?

I will be using the stock P400 cast aluminum oil pan. Based on my calculations it will just clear the factory crossmember. The P400 is rated at 250 HP NA and 450 FPT. I plan to photodocument everything in my rebuild thread. Received my new Db2831-4911 pump yesterday from Huckstorf Diesel. It is rated at 200 HP. Once I get things together and running I might play with the fuel screw. Because this thread pertains to headers, I will say that my plans are to keep the P400's operating temperature under 210 degrees and let her breathe. The older I get, the more I dislike how turbochargers work. Their principle method of operation is to take 700-800 degree exhaust gases to power the turbo compressor, which in turn compresses outside air which through the laws of nature heats the air it is compressing. As the turbo compressor works, it too is heated by the hot exhaust gases. All this heat cannot escape efficiently, which then heats up the engine itself. And heat, beyond anything else, is the destroyer of engines. The NA P400 will provide me with adequate power for my needs. The ceramic coated headers from Stan's will remove the hot exhaust gases as fast as possible.

Karl kostman · Jul 17, 2018

Sharecropper you have my apologies for spouting off WITHOUT all the facts, My wife says I do that once in a while also! I apologize, I will keep quiet next time!
Karl

Sharecropper · Jul 17, 2018

Karl kostman said:
Sharecropper you have my apologies for spouting off WITHOUT all the facts, My wife says I do that once in a while also! I apologize, I will keep quiet next time!
Karl

Ha Ha! Karl no need to apologize! I hope you can follow my P400 install on my rebuild thread.

ken · Jul 17, 2018

Sharecropper,
I went with a single plane intake from a 93 6.2. It is much more open. A also used the 92 air filter housing and made a ram air with a stock hose from a 85 with a 350. The air filter housing has a intake hole twice the size of the stock cucv. My engine is a 6.5 with the turbo removed. I installed dual 3 inch exhaust that stops just before the rear axle. I can spin the tires at a stop sign easy. But hate to do so.

nyoffroad · Jul 17, 2018

WOW I go away and then every body checks in!
Those headers are nice but pricy! They'll have to go on my "some day" list. I'm not looking to soup up my 6.2 just make it more efficient and take advantage of whats already there. Heads and manifolds have already been blue printed smoothed and polished and the pistons/rings and rods balanced those simple mods have made for the smoothest idle I've ever seen on a 6.2 so headers are the next logical step. I think.

Sharecropper · Jul 17, 2018

ken said:
Sharecropper,
I went with a single plane intake from a 93 6.2. It is much more open. A also used the 92 air filter housing and made a ram air with a stock hose from a 85 with a 350. The air filter housing has a intake hole twice the size of the stock cucv. My engine is a 6.5 with the turbo removed. I installed dual 3 inch exhaust that stops just before the rear axle. I can spin the tires at a stop sign easy. But hate to do so. View attachment 734700

Ken; I already have the single plane intake but I gotta have one of those '92 air filter housings and ram air. Is that air filter housing from a '92 6.5 diesel? Is there a part number?

Sharecropper · Jul 17, 2018

nyoffroad said:
WOW I go away and then every body checks in!
Those headers are nice but pricy! They'll have to go on my "some day" list. I'm not looking to soup up my 6.2 just make it more efficient and take advantage of whats already there. Heads and manifolds have already been blue printed smoothed and polished and the pistons/rings and rods balanced those simple mods have made for the smoothest idle I've ever seen on a 6.2 so headers are the next logical step. I think.

I have arrived at my "some day". The headers were $1050 including freight. The ceramic coating alone was over $300. I don't care what it costs. I am spending my daughter's inheritance. She will never know.

ken · Jul 17, 2018

Sharecropper said:
Ken; I already have the single plane intake but I gotta have one of those '92 air filter housings and ram air. Is that air filter housing from a '92 6.5 diesel? Is there a part number?

They were on a 6.2 C2500 I found in a junk yard. I don't have apart number. I liked how simple the CRD valve was. You will need a passenger side valve cover to use it. I too have thought about headers but haven't pulled the trigger. My Humvee sucks up all my money lol. Please post pics of your headers when you get them. I'd like to see their quality.

Keith_J · Jul 18, 2018

Diesels cannot have valve overlap, the pistons would hit the valves at TDC. High compression ratio. ..so the value of headers is minimum to start. Headers work to reduce back pressure at higher engine speed dynamically. This increases volumetric efficiency at higher speed. Speeds which are limited by diesel injection speed. So exhaust manifolds are designed to reduce low speed restriction without attention to scavenging. The runners would have to be very long to be effective and at that, the benefit is nil.

Sharecropper · Jul 18, 2018

Keith_J said:
Diesels cannot have valve overlap, the pistons would hit the valves at TDC. High compression ratio. ..so the value of headers is minimum to start. Headers work to reduce back pressure at higher engine speed dynamically. This increases volumetric efficiency at higher speed. Speeds which are limited by diesel injection speed. So exhaust manifolds are designed to reduce low speed restriction without attention to scavenging. The runners would have to be very long to be effective and at that, the benefit is nil.

Thanks Keith for your extremely informative reply. However I had to watch the educational video below to fully understand and comprehend your statements...........

https://www.youtube.com/watch?v=MXW0bx_Ooq4

85CUCVtom · Jul 18, 2018

Please post pictures when they arrive!!!!

Sharecropper · Jul 18, 2018

85CUCVtom said:
Please post pictures when they arrive!!!!

I plan to move over to my rebuild thread once work commences. My P400 is due in here within the next few days, so it shouldn't be too long.

LT67 · Jul 18, 2018

Sharecropper said:
I will be using the stock P400 cast aluminum oil pan. Based on my calculations it will just clear the factory crossmember. The P400 is rated at 250 HP NA and 450 FPT. I plan to photodocument everything in my rebuild thread. Received my new Db2831-4911 pump yesterday from Huckstorf Diesel. It is rated at 200 HP. Once I get things together and running I might play with the fuel screw. Because this thread pertains to headers, I will say that my plans are to keep the P400's operating temperature under 210 degrees and let her breathe. The older I get, the more I dislike how turbochargers work. Their principle method of operation is to take 700-800 degree exhaust gases to power the turbo compressor, which in turn compresses outside air which through the laws of nature heats the air it is compressing. As the turbo compressor works, it too is heated by the hot exhaust gases. All this heat cannot escape efficiently, which then heats up the engine itself. And heat, beyond anything else, is the destroyer of engines. The NA P400 will provide me with adequate power for my needs. The ceramic coated headers from Stan's will remove the hot exhaust gases as fast as possible.

250hp and 450ft lbs torque naturally aspirated?

6.2 headers

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