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Ian Hill · 05-02-2010, 09:28 AM

i played around a little between the standard set of Schonfield's and a set of the same with perf. welding collectors. it became instantly clear that the set with the merg collector made some serious gains in the torque curve and amounts while slightly increasing the horspower.

I would like to agree with SSdiv6, and add a bit here. i my opinion, as insignificate as it may be - stainless headers vs. steel headers. As long as the headers are made by the same person, on the same jig with the same gage metal, they should make the same horse power. that being said 5 engines built the exact same way will never make the same horsepower, so good luck. where there is a chance for human error, there will be a chance for human error. while maing headers this could be a simple as a header radius being trimmed .062" too long or the start or stop of the tig weld putting a pimple of weld into the inner diameter of the tube thus affecting the air flow.

Stainless, to me, is only being used for the purpose that these headers become your last set of headers. they will outlast you, your car or your combination. What would change my way of thinking is if someone would expand on the fact that stainless holds more heat than regular steel there for is there chance that from pulse to pulse there is less change of temperature? if this was true, i would expect velocity to slow down using stainless vs steel as the convection of cooler air helping to pull the hotter air out of the head would be less. Or is it that air pulses being closer to the same temperature travel quicker?

This is a great thread so far, great imputs from all. I would say if you are lucky enough, like my self, to find an off the shelf cheap set of headers that work to your expectations, then hooray for us! oher wise open your wallet. i have been .89 under in my first year as a stocker racer and am having a blast. i look forward to next weekend as i should be out for the first time this year. rebuilt motor way more trans gear, diff gear and more spark - a million ways to slow a race car down, i hope i miss them all.
Ian

05-02-2010, 09:28 AM	#24
Ian Hill Member Join Date: Sep 2008 Posts: 216 Likes: 0 Liked 6 Times in 3 Posts	Re: Anybody Use Performance Welding Headers? i played around a little between the standard set of Schonfield's and a set of the same with perf. welding collectors. it became instantly clear that the set with the merg collector made some serious gains in the torque curve and amounts while slightly increasing the horspower. I would like to agree with SSdiv6, and add a bit here. i my opinion, as insignificate as it may be - stainless headers vs. steel headers. As long as the headers are made by the same person, on the same jig with the same gage metal, they should make the same horse power. that being said 5 engines built the exact same way will never make the same horsepower, so good luck. where there is a chance for human error, there will be a chance for human error. while maing headers this could be a simple as a header radius being trimmed .062" too long or the start or stop of the tig weld putting a pimple of weld into the inner diameter of the tube thus affecting the air flow. Stainless, to me, is only being used for the purpose that these headers become your last set of headers. they will outlast you, your car or your combination. What would change my way of thinking is if someone would expand on the fact that stainless holds more heat than regular steel there for is there chance that from pulse to pulse there is less change of temperature? if this was true, i would expect velocity to slow down using stainless vs steel as the convection of cooler air helping to pull the hotter air out of the head would be less. Or is it that air pulses being closer to the same temperature travel quicker? This is a great thread so far, great imputs from all. I would say if you are lucky enough, like my self, to find an off the shelf cheap set of headers that work to your expectations, then hooray for us! oher wise open your wallet. i have been .89 under in my first year as a stocker racer and am having a blast. i look forward to next weekend as i should be out for the first time this year. rebuilt motor way more trans gear, diff gear and more spark - a million ways to slow a race car down, i hope i miss them all. Ian