Man I wish you were going to put them on.... I am thoroughly convinced that those shorties and a set of high flow cats added together could be worth around 20/20. The problem I have with the "consensus" around here that shorties are worth 0/0 is that "consensus" in this case is defined as one guy saying it and about 50 repeating it ad nauseum.... This isn't meant to start anything, but there are two things very wrong with that generalized statement.... 1) the Edelbrocks are a much better design IMO than what that individual installed. Any shortie design (including those used in this example) that dumps the tubes right into the ball side of a ball and socket flange is junk. The stock headers have a better collector than that, and the Edelbrocks are the only shortie I've seen with a good collector setup. 2) direct comparisons are always made to longtubes, when the longtube systems by default also include either an offroad pipe or high flow cats. Installing shortie headers by themselves with either stock or high flow cats is naturally going to result in lesser gains than if you install headers and offroad/highflow at the same time like you do with longtubes. If you were to install longtubes and reconfigure the stock cat pipe to keep all 4 cats behind them you would also see minimal gains. Its very much apples and oranges yet tossed around in every exhaust thread like gospel. I was VERY tempted to install the Edelbrocks until I finally went with longtubes, the choice coming down to I might get rather serious with an n/a build down the road so I wanted the least restriction possible. With stock cats I'd be surprised if someone didn't see around 5/10 with the Edelbrocks, and with high flow cats at the same time I think around 20/20. I'm really hoping someone installs them at some point and gets a before/after dyno...

 

Why are there so many sheep driving f-150's? Here are my numbers:


Def not 0/0....but I'll let the sheep decide.

 

You posted a graph from JBA's website, those are not "your numbers", need to see independent testing to mean much of anything....

 

Hey Roush,

Those are my numbers, where do you think JBA got them to put on there website........

 

What, we were supposed to guess that? It looked as though you just posted a link to a manufacturers claim for the parts that you bought, and we all know (or at least should know) how unrealistic many manuf. claims can be.... I didn't say those results were not possible, just didn't appear as though they came from your truck. Looks like you got some nice gains, are those results exhaust parts only or was there some tuning done?

 

There was no guessing. he said "Here are my numbers:"

 

That was just exhaust and headers. I have since tuned with Xcal II 91 oct, so I'm not sure what I'm running now. All I really want now is CAI, but in almost 3 years in owning my truck I haven't bothered to get one. I have a drop in K&N cone filter and the stock air box runs through the fender on the 4.6's so I don't know how much *gain" I'll add for the extra $250.

 

You're right, it was crystal clear, my bad. Everybody's dyno sheets are linked from manufacturer websites and have corporate names across the top....

 

How many dynos can you find on any manufacturer's website? From that number, how many are configured exactly the same way as your truck, ie same catback, same model year, same engine size? Pretty small odds.

As an aside, I was posting those numbers give weight to your comments:

Very strange to hear you challenge the information that was provided to back up your statements.

 

Aargh....its quite simple.... You posted what looked like it was just marketing material for a manufacturer, with "JBA" accross the top there is no way someone should assume that was actually your truck instead of just a manufacturer claim. You cleared it up. I said "ok, looks like you got some nice gains". Whats so difficult to follow there? The "crystal clear" comment was not to you, it was to the person who was quoted and who apparently thinks it should have been obvious that a graph with "JBA" at the top was your personal vehicle....perhaps that person wasn't observant enough to even notice that there was an exhaust company name at the top....

How far fetched is it to think you probably saw those numbers on JBA's website and said "hey, nice results, I think I'll buy that stuff..."? Not very...

This is why I hate the internet sometimes.... I didn't challenge the information, I questioned the source. It looked like you were using a manufacturer claim instead of personal results. Very simple. It was cleared up. Can we move on now?

 

Sooo... I wanna know - Hows it run??? Did you notice a difference in SOP power - gas mileage - towing ability? Thanks man...

 

I know exactly what you're saying. Which is why when people ask about what they should run, I try to be specific in my wording not exact. For instance, instead of saying shorties will gain you nothing, I'll say built54 gained 0/0. I really find it hard to believe that they would flow even just a bit better than stock to give even a little bit more power. I believe built54 really did see 0 gains but like you said, going to long tubes forces you to change more than just the manifolds. You have to ditch atleast 2 of the cats and then most people are going to just run the high flows while they're at it. That's a big difference than just replacing the stock manifolds with shorties.

The reason I decided to switch to the long tubes was because I wanted the best setup so that I only had to do this once. I didn't want to regret it later. And actually, I just received my OBX long tubes in the mail today. They look excellent. Found out just how big my 94306 Magnaflow cats are though. Definitely going to have to cut the mid pipes some and weld the cats to them because I don't think there is going to be enough room for a clamp on the driver's side. No biggy.

Anyway, if anyone is interested, I am trying to get rid of the Edelbrock shorties if someone wants to take their chances.

 

Agreed. My apologies if I came off a bit short. I started a new thread to help some guys with the sound aspect of my headers and exhaust and some ***** tried to flame me for no reason. Just said:
I got a bit bent out of shape after that....

Shorties have done fine for me. I didn't want to lose low end torque or have a really loud system - if I did I would have got a flowmaster and gutted the cats. I'm sure that LT headers give better top end performance, but I think they give up some bottom end performance. To me it was a trade off, and since I don't do a lot of high rev driving, I stuck with the shorties. If I had an "L" or a stang or hemi-charger , we might be having a different discussion.

Alstar - (E.) All of the above. But remember, we're talking about 5500 lbs o' steel in a brick shape - You'll never have a corvette like 0-60 time. But, you will be able to pass cars on the highway with no prob. And, towing is good with the shorties because of a little back pressure for the injectors. I cannot say which is better for you: LT's versus Shorties. This you will have to decide based on your own needs.

 

Thanks...and as far as I was concerned, I was always under the impression long tubes gave better low-end and shorties for top. See, I learn something new everyday. My truck is a 06 F150 LWB 7700 that it a tow truck 1st, then a daily driver 2nd. I bought it because it was 4wd, had a long bed, and could tow a small toy hauler. So low end is where I want the gains. I am thinking to run a set-up that is pretty popular with my cousin's shop in San Diego and that is after I choose headers, go with only 2 high-flow cats, x-pipe and dual 2.25" out each side. I have a pretty good pricing through JBA and thats why i always wanted to see how people liked them. Thanks for your time bro...

 

my shorties gained no hp or torque on the dyno, i gained 30hp/35ftlbs from my long tubes. didnt loose anything down low or up top.