What kind of results did the Supermaxx headers show on the dyno?
Were the headers the ONLY mod to an otherwise absolutely stock SSR? (Important because headers usually only have any BIG impact when coupled with other mods designed to alleviate OTHER airflow bottlenecks)
Was the dyno testing done on an 04 5.3L or an 05 6.0L?
These are all important questions to get answers to.
JimG....Went back to search the statement I made. Here is what I read.....
"We are working on listing alot more SSR specific performance parts. Alot of LS1 and LS2 engine componients can be used while induction and exhaust mods are vehicle specific. These long tube headers are one of them! We've installed them on many different vehicles with very good results (usually about a 25hp gain). This is a bolt-on long tube header package that doesn't require you to do any cutting/welding.
From the SuperMaxx ad at tbyrne Motorsports. It did NOT say they were dyno tested. My error.
Purple Penelope: I didn't mean to make YOU feel bad. I was just reacting to yet another "implication" from a vendor that a component has somehow been "proven".
I have done a lot of research on headers (and other engine components) over the years, and vendors make all sort of statements intended to IMPLY that some component has been "teted and proven" in a situation "just like yours".
Usually, a careful reading shows where the specific in ONE case has been made to sound like the GENERAL result. In the case of these headers, the key statement is
"We've installed them on many different vehicles with very good results (usually about a 25hp gain)".
That certainly IMPLIES you can expect a 25 hp gain.
The problem is that a 25hp gain on our stock SSRs is about 10% of the net rear wheel power, and that's a LOT to expect from ONLY headers added to an otherwise stock engine. Usually, headers are ONE of MANY mods required to flow more air through the ENTIRE engine intake/engine/exhaust system. if you have a bottleneck ANYWHERE that flows ANY less than the headers, that will certainly make the headers a moot improvement. The 25hp quoted as the "usual" result is almost certainly based on using these headers on vehicles already HIGHLY modified, where the exhaust header system has become THE big bottleneck.
I'm not saying that the headers don't add power to even an otherwise bone stock SSR, but I am saying it's VERY unilkely that the power added is more than a VERY small percentage unless you also remove all of the other numerous restrictions to air flow in the overall intake/engine/exhaust SYSTEM.
JimG....Agree wholeheartedly with your statements. It's the case of the weakest link is the strength of the chain....in a manner of speaking.
Headers will be installed on Tuesday AND I just bought a Magnaflow cat back system on ebay. Confirmed within the hour. That should free up some HP and TQ which I've been looking for all along.
I also need to go to a K&N type filter but that damn thing is so ugly I don't want it staring at me when I open the hood. I hope Vaaram comes out with their new air handler sometime soon. Much more appealing to the eye and engine as well.
I just received my first package from Dynatech. It has the crossover pipe pieces, clamps, brackets, O2 sensor wire extension, installation instruction book, etc. The headers will follow after they get the ceramic treatment.
The installation looks pretty straight forward, but I have two questions. They state that the torque on the header bolts at the block should be 20 ft-lbs. This seems not nearly tight enough. What is the thinking here? I'm sure they know what they are talking about, but I've heard that 40 ft-lbs. and up is more like it.
Also, I saw (in a another thread, I think) that it's not necessary to drop the rear of the tranny if you just cut the existing y-pipe out of the way, and don't worry about saving it. Is this the easy way to go? It's the way I'm leaning.
Peaches: The 10 ft lb torque on the header bolts IS almost certainly correct. I just read another article on the Supermax headers being installed into a 2003 Ram Hemi that i all aluminum like our SSR engines are, and the troque there was 15 ft lb. - probably because of the aluminum heads. The installers also warned people to use anti-seize on the bolts, because of the aluminum heads they are being tightened into.
cca05: My research on these headers brought to light a number of things about them, and all but one being VERY positive:
- The pricing seems high until you remember that these are all stainless, and INCLUDE two hi-flow cats, and a proper y-pipe, and factory type connections where needed to mate with the rest of the exhaust system
- Very good well thought out instructions.
- Easier than average install (one installer commented that it was the easiest header install he had done in 40 years)
- There were both torque and horsepower increases across the rpm spectrum on that hemi installation, and no dips anywhere.
The horsepower increase was only about 17 hp or just a bit more than 6% on that engine's rear wheel power. (I edited these after my initial posting to correct them, as I had at first said 15 hp and 5%. Re-checked the article's data!)
However, the article noted that it was a very hot (92 degrees) and humid day. I have seen firsthand how dyno sessions on that kind of day do NOT usually let the engine perform to its normal potential, because although the dyno operator applies correction factors to compensate for the ambient conditions, in reality NO engine responds correctly to adverse ambient condtions, AND most engines will retard their timing under those conditions and load to prevent detonation. So, the dyno results were inconclusive in my book.
I need better data to convince myself that these are the way to go, but since everything else about them looks so good, I will persevere and see if I can find better data.
Turns out that one of our own members here, 04Z16, posted dyno curves for the Supermaxx headers versus stock on his SSR late last year. I just found them.
The gain in PEAK power is about 16hp. There is one point, 4000 rpm, where it APPEARS to gain 20 hp via the headers, BUT that is shown to be an anomoloy when you look at the stock TORQUE curve, which shows that his SSR was simply "missing" for some reason in the 4000 to 4300 rpm range when the "stock" run was done. That problem eviently disappeared when the header run was made.
You can find the charts by going to the "Gallery" and searching based on "Dyno".
Factoring out the anomoly mentioned above, I fed the gains in torque into my modeling software, and these headers are good for a 0.4 second reduction in 0 to 60 time, if installed onto my specific SSR with its 4.56 gearing and current horsepower before the headers.
I'm thinking I should maybe buy a set, if I can talk myself into that kind of money.