new guy with some performance questions
Jan 30, 2009 | 09:20 PM
#51
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Joined: Jan 2009
Posts: 10
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From: Medina, Ohio
thanks everyone to allow me to educate myself a little here as well, some really good information as I am in the same boat as ty, just with an 07 6.0 MAX. Problem is that I already have the Blackbear and intake..not that it is really a "problem" .....so a retune is gonna be in the works after headers and exhaust. Thanks
Jan 30, 2009 | 10:07 PM
#52
On The Tree
Joined: Apr 2007
Posts: 176
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From: Houston, Tx
well it's time for my daily chime in. back to your head question better flow through your heads is what you're lookin for. get your stock heads worked over a valve job and some porting and ploishing will do you nice. In my case i'm running bone stock truck heads on top of my LS1 which has a pretty big cam in it. I'm not getting the full advantage of my cam because my heads. you can hold the valves open as long as you want but if your heads dont flow well your not gettin all you are capable of.
Jan 31, 2009 | 12:08 AM
#53
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about the headers... i think i want to go with long tubes but i think 1 5/8" prime might be a better option for this 5.3L; and maybe even a 2.5 collector (still not sure on that)... i just think the 1 3/4" is to big for this motor being normally aspirated... if i had some bigger cams and forced induction it would be a diffferent story... Im having trouble finding 1 5/8" primary headers.
on to the heads, i did a minimal amount of reading on this subject as i have still been researching the headers "issue"... but what you are saying makes since Barley. when i get closer to swaping in a new cam, i will definetly look into the heads too as it seems like one might go along with the other.
on to the heads, i did a minimal amount of reading on this subject as i have still been researching the headers "issue"... but what you are saying makes since Barley. when i get closer to swaping in a new cam, i will definetly look into the heads too as it seems like one might go along with the other.
Jan 31, 2009 | 04:44 AM
#55
I can totally see why people say they lose power with longtubes. Most of the primaries are too big for our trucks unless your making big power, same for the y-pipes. It sounds to me like you need shorties. I know everyone says stay away from them, but most of these people don't have them or have the cheaper ones. They really are better than stock manifolds.
I felt a really good gain from my coated JBA's and most of it was in the low rpm cruising range which is perfect for my needs. Next to my tune the shorties added the most power of my upgrades. Longtubes are good for about 10 hp over shorties, but thats in the higher rpm range. You just have to decide where you want your power and what your future upgrades will include.
I spent about 900 on my headers and dyno tune. Plus I didn't have to replace my y-pipe, which for me will be fine with all my planned upgrades. This is all just my opinion so take it for what its worth, hope it helps.
I felt a really good gain from my coated JBA's and most of it was in the low rpm cruising range which is perfect for my needs. Next to my tune the shorties added the most power of my upgrades. Longtubes are good for about 10 hp over shorties, but thats in the higher rpm range. You just have to decide where you want your power and what your future upgrades will include.
I spent about 900 on my headers and dyno tune. Plus I didn't have to replace my y-pipe, which for me will be fine with all my planned upgrades. This is all just my opinion so take it for what its worth, hope it helps.
Also you will need a transmission soon with all the performance that you plan on putting on the truck.
Jan 31, 2009 | 07:22 AM
#56
Here's my experience with the shorties and LT's. I had Gibson shorties for a few years and didn't feel any difference over stock. I then switched to StainlessWorks LT's with catted y-pipe (1 3/4 primaries), and I didn't lose anything down low, but definitely gained up high. I thought that it got more responsive down low actually, but it may have been the placebo effect. Some day when I swap in my LQ9 I might gut the cats, but I don't think that it will help at all with my current 5.3...I believe that would hurt my low end for sure.
Jan 31, 2009 | 10:27 AM
#57
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let me hypothisize here....
when a person puts on the LT headers, they see minor but still very noticable gains in the high powerband, but nearly no gains down low so it "feels" like you are actually losing power down low... is this possible?
when a person puts on the LT headers, they see minor but still very noticable gains in the high powerband, but nearly no gains down low so it "feels" like you are actually losing power down low... is this possible?
Jan 31, 2009 | 01:00 PM
#58
I have converted to the 3" collector headers on my truck, and before I could not spin the tires off of the line, 35" tires, now I can get them to spin off of the line.
After the 3" collector it goes back down to 2.5" pipe to the 2.5" magnaflow high flow cats to the 3" flowmasters mufflers. You just might have to down size the pipe coming out of the collector.
After the 3" collector it goes back down to 2.5" pipe to the 2.5" magnaflow high flow cats to the 3" flowmasters mufflers. You just might have to down size the pipe coming out of the collector.
Jan 31, 2009 | 03:07 PM
#59
Mmmm, maybe...I think that some guys actually do lose down low, due to the primaries, collectors, and sometimes 3" y-pipe being too much for the combo, not enough scavenging. My set-up only has 2.5" collectors and y-pipe...the 1 3/4" primaries are overkill for my current combo, but don't seem to be hurting anything for whatever reason.
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