7.3 Headers? - Diesel Truck Forum - TheDieselGarage.com
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post #1 of 11 (permalink) Old 01-03-2007, 09:14 PM Thread Starter
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7.3 Headers?

I was reading my issue of Diesel Power the other night and noticed an advertisement for some headers for 1999-2003 7.3 Powerstrokes. Are any of you guys running these headers or have seen any info. on them. Just curious as to what kind of gains could be acheived. This site rocks!!!!

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post #2 of 11 (permalink) Old 01-03-2007, 09:24 PM
 
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Diesel Innovations makes them.
They are an improvement over the cast logs that come factory. They run about 1400 bucks so they're deffinately not for the average Joe, That being said the improvement in airflow has been said to be significant, plus they're shiny stainless and we all know that shiny trucks are faster right?
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post #3 of 11 (permalink) Old 01-03-2007, 10:14 PM
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I wouldnt say there great... Dockboy is running the stock headers as far as I know.

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post #4 of 11 (permalink) Old 01-03-2007, 10:36 PM
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yea i saw that same ad i wouldnt mind have a set if they werent so expensive, a buddy of mine owns a muffler shop and thought about making a set.....do ya'll think they would hold up to the heat as good as the manifolds would?

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post #5 of 11 (permalink) Old 01-03-2007, 10:36 PM
 
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post #6 of 11 (permalink) Old 01-03-2007, 10:39 PM
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:Thumbup:^those look a little more beefy than the headers ^

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post #7 of 11 (permalink) Old 01-04-2007, 02:13 PM
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I wouldn't even run headers on a gasser that was to be used for towing, and they will make a real difference on them. Only reason is they are much more prone to leaking. I am not saying you cant make headers seal, you can. It just aint easy like manifolds.

The only way you can gain anything by putting headers on an engine is scavenging due to the collector or a larger size tube (more airflow). When you have backpressure from a turbo the scavenging effect is greatly reduced and maybe even eliminated so the only real gain is airflow from a larger size or better designed header.

I would say that if you are really wanting to change the stock manifolds I would look more into the manifolds that LocoMotion linked to.

I have no way of knowing for sure but my guess is that the hp/tq difference between those aftermaket manifolds and the headers is little to none.

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post #8 of 11 (permalink) Old 01-04-2007, 06:16 PM
 
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Quote:
Originally Posted by LocoMotion
Ive never saw anyone running those. Are they ported stock manifolds or new castings? IMO for $1000 there are far better ways to gain 20 hp and lower egt's 75-100*.
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post #9 of 11 (permalink) Old 01-04-2007, 07:41 PM
 
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I agree totally Luke, that would the last 1000 I would spend.

FastFreddy ran those for a while and saw big differences, mostly in egt's.
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post #10 of 11 (permalink) Old 01-04-2007, 08:28 PM
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I've heard big claims on the increase on those extrude honed stock manifolds but until I've seen some actual test data I don't know I believe any of those huge claims. I've talked to Dave at DI and he said they did notice a nice increase in the headers they sell but at the time I talked to him he said they hadn't done any before and after dyno testing with them. He did say they made a bigger difference in the lower end of the power band and in the throttle response than they made in the peak power on the top end as I recall.

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