edzsilverss

iTrader: (4)

I had my engine replaced a while back with the one in my sig. It's a heads and cam with full bolt ons. Just wondering if my mac headers are a bottle neck or not. It made 423/400 and the previous owner had the big 1 7/8 headers and 3 inch duals vs my macs and 2.5 duals and it made 434/408 in his car. Should I spend the extra money for long tubes or just stick with the macs and hook the hose back up. I just don't see spending 700 bucks for 10-12 hp. I already have the dry nos 5177 kit on my car it's just not tuned for the bottle. I could more than make up for the headers with a little bottle.

Pntbll309

iTrader: (33)

The headers and intake manifold are your bottlenecks. Get the air in and out faster and in a higher quantity.

shaolink9

i wouldnt i love my macs, plus keep in my alot of factors influence dyno numbers. Hope this helps.

edzsilverss

iTrader: (4)

yeah for now, I think I'll just spray a 150 shot and grin from ear to ear. I have plenty of fuel goodies to support it. Maybe later on when I can afford it, get some long tubes and a bigger intake. But then I'd need a bigger t/b as well. When will it end? I bet it would hit 550 rwhp with a 150 shot or close to it as it sits.

Quik Sand

iTrader: (6)

Im in a similar position (I also run the Macs). I made a thread similar to this and the responses were pretty divided. Personally Im going to stick with the Macs until I can afford LT's, Fast intake, and bigger throttle body

edzsilverss

iTrader: (4)

that's what I'm thinking also. By the time you add in labor, it's just not worth the extra 10-15 hp. I could sale my setup but it's just not worth the trouble me thinks. I'm sure I'll be happier when I hook the bottle back up.

RrCoX22

iTrader: (6)

are you asking if "macs and 2.5 duals" are better than "the big 1 7/8 headers and 3 inch duals" ???

this is a no brainer far as which one will produce more power overall... although if your main concern is "through the curve" than you have a decision as you will most likely lose some low end with the 1-7/8" and 3" duals

edzsilverss

iTrader: (4)

No, I know they will produce more power overall but would it be worth the money for an additional 10-12 hp with my setup. I could make a shitload more power than that hooking the bottle back up and it would be way cheaper. The guy who had the engine before me didn't make much more than I do now on motor.

RrCoX22

iTrader: (6)

you most likely would benefit more by going to 1-3/4" longtubes... you'll definitely lose some down low which most likely won't make up for the gains up top.

just save for some 1-3/4" and y-pipe and then you can ease off the bottle

edzsilverss

iTrader: (4)

I'm pretty sure my duals are better than any y-pipe and I'll never back off the bottle lol. I think I'll get some 1-3/4 and have my duals redone to fit those. After that look into a bigger intake. Then again, many guys are making great power with the LS6 intake.

JP

same here

Ping King

iTrader: (20)

Keep them for the ground clearance. If anything have some v band's welded onto the collectors and run 3" pipe to the begining of the x.

I did that. great ground clearance. I was stupid and went to edelbrock headers which are fantastic, but hang lower.

Fifedogg

iTrader: (15)

I would just find a cheap set of pacesetter 1 3/4's LT's. You can find them for super cheap in the classified section.

DarkJuggalo

iTrader: (6)

i would switch to long tubes, thats whats holding you back

edzsilverss

iTrader: (4)

I will but then should I keep the 2.5 duals? I just can't afford both headers and 3" duals right now. I could always run 3" tubing to the x of the duals for a little more breathing room if I keep the 2.5 duals. What about the pro flow mufflers I have on there now? Should I change those for dynomax bullets for a little more flow?