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H/C/I low Dyno Numbers??

 
Old 01-18-2019, 09:15 AM
  #41  
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Originally Posted by Darth_V8r View Post
Will not happen if you are set on 3 inch Y and 3 inch cat back.

Personal experience -- Mamo 220 heads, arguably the best available for a 5.7, 227/235 cam, 1-7/8 headers, 3 inch Y and cat back, all kinds of optimization. 395 rwhp. Talk about PISSED. Tuner exact words -- something is wrong with your exhaust.

With open headers, 470. Add X pipe, 3 inch true dual, light clutch, 496.

Yes duals are expensive, but cheaper than buying a cheap exhaust and THEN duals. Believe it or not we are trying to SAVE you money.
you're saying you gained 100rwhp from a different exhaust?
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Old 01-18-2019, 09:47 AM
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Originally Posted by Dylan Latshaw
you're saying you gained 100rwhp from a different exhaust?
Between exhaust and the lighter clutch, short answer yes. Because I took the banana out of the tailpipe, so to speak

But exhaust issues. Plugged cars, bad merge, etc were also going on. Not just the pipe size.
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Old 01-18-2019, 09:49 AM
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I just found out I do have a 3in exhaust....
bbk headers, to a 2.5in y pipe to a 3in cat back flowmaster..
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Old 01-18-2019, 09:50 AM
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Upgrading to a 3" Y will do exactly dick
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Old 01-18-2019, 10:08 AM
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Originally Posted by Darth_V8r View Post
Upgrading to a 3" Y will do exactly dick
I don't understand...?
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Old 01-18-2019, 10:32 AM
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2 2.5 inch pipes will outflow a single 3 inch pipe. Similarly 2 3 inch pipes will outflow a single 3 inch pipe. So if you go from a 2.5 Y to a 3 inch Y the single 3 inch intermediate pipe is still the issue. So it will not do much of anything to swap Y pipes.
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Old 01-18-2019, 10:48 AM
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Originally Posted by Darth_V8r View Post
2 2.5 inch pipes will outflow a single 3 inch pipe. Similarly 2 3 inch pipes will outflow a single 3 inch pipe. So if you go from a 2.5 Y to a 3 inch Y the single 3 inch intermediate pipe is still the issue. So it will not do much of anything to swap Y pipes.
I understand that. It was mentioned before that flowmaster aren't good for power just soundso if I get a better brand exhaust. (Magnaflow) then it will increase the horsepower? Would rather spend 50 then 500
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Old 01-18-2019, 11:44 AM
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Originally Posted by Dylan Latshaw View Post
I just found out I do have a 3in exhaust....
bbk headers, to a 2.5in y pipe to a 3in cat back flowmaster..
Trust me when I say I have had the BBK headers and Y and swapping to 1 7/8 headers and 3" true duals made a significant difference. My current set up isnt optimal in my eyes, I am ditching the pacesetters and there crappy x for SE 1 7/8 headers and x I know its choking my car up.
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Old 01-18-2019, 11:48 AM
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If its not a daily driver you could simply do it like I had mine. mine was just headers into the Y pipe then about 2' of pipe with a Magnaflow bullet muffler welded on it. I got it from Advanced auto for 80 $ it sounded good. deep and throaty and I know it was flowing well
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Old 01-18-2019, 11:50 AM
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Originally Posted by madmike9396 View Post
If its not a daily driver you could simply do it like I had mine. mine was just headers into the Y pipe then about 2' of pipe with a Magnaflow bullet muffler welded on it. I got it from Advanced auto for 80 $ it sounded good. deep and throaty and I know it was flowing well
That's a pretty good point, I had tossed that idea around when I was swapping out my BBKS definitely is budget friendly.
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Old 01-18-2019, 12:26 PM
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Originally Posted by Dylan Latshaw View Post
I understand that. It was mentioned before that flowmaster aren't good for power just soundso if I get a better brand exhaust. (Magnaflow) then it will increase the horsepower? Would rather spend 50 then 500
Originally Posted by madmike9396 View Post
If its not a daily driver you could simply do it like I had mine. mine was just headers into the Y pipe then about 2' of pipe with a Magnaflow bullet muffler welded on it. I got it from Advanced auto for 80 $ it sounded good. deep and throaty and I know it was flowing well
Or do cutouts for cheap. open them up when you want the loud and close them when you want the quiet
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Old 01-18-2019, 12:50 PM
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That's one of the best if not the best way of getting decent flowing exhaust on the no room having pos cars
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Old 01-18-2019, 03:32 PM
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Originally Posted by Dylan Latshaw View Post
you're saying you gained 100rwhp from a different exhaust?
ive seen cars gain 150 whp by unbolting dual 3" exhaust with flowmaster mufflers, no joke. granted it was a big block but still. Flowmasters belong in a garbage can.


https://ls1tech.com/forums/generatio...-ford-9-a.html
^^ thats me. tons of ground clearance. Hell even a Mufflex 4" Y pipe setup will gain power over what you currently have.
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Old 01-18-2019, 03:36 PM
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What do you all think? I know true duels will probably gain me a few more hp but I'm thinking of putting in a flowmaster merge (2.5 to 3in) and replacing the flowmaster exhaust with a magnaflow. How many ponies do you think I'd gain?
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Old 01-18-2019, 03:48 PM
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Originally Posted by dckmn52 View Post
ive seen cars gain 150 whp by unbolting dual 3" exhaust with flowmaster mufflers, no joke. granted it was a big block but still. Flowmasters belong in a garbage can.


https://ls1tech.com/forums/generatio...-ford-9-a.html
^^ thats me. tons of ground clearance. Hell even a Mufflex 4" Y pipe setup will gain power over what you currently have.
Flowmaster makes mufflers of all sizes and sound levels, and flow capacities. Most guys just slap 4" case mufflers on their car and call it good, when 5" cases would make a bigger difference.
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Old 01-19-2019, 11:35 AM
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Originally Posted by Dylan Latshaw View Post
What do you all think? I know true duels will probably gain me a few more hp but I'm thinking of putting in a flowmaster merge (2.5 to 3in) and replacing the flowmaster exhaust with a magnaflow. How many ponies do you think I'd gain?
I think that will cost more and make less hp than a pair of cuts outs directly off of the headers.
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Old 01-19-2019, 12:39 PM
  #57  
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What it really comes down to, & has been stated, is a high performance 5.7 V8 is not going breathe well through a 2.5"-3" single exhaust. No matter really what muffler as you will see some differences swapping around. But you still have the long single 3" pipe that is going to cause back pressure. That only gets worse the more power the engine makes. My opinions. It seems to get the best of both worlds, & stay pretty low cost, the cut outs would probably be the best. Agreeing with others that have stated this. Next the SE true dual setup doesn't seem too pricey & shows good gains. TSP also has a true dual over the axle setup or the dumped exhaust. Going to dumped exhaust is a different realm & you don't seem interested in that.

It really is a line you have to walk when getting into performance/street. As there's always cost as well. On your car I would think the exhaust you have maybe holding you back 20-30rwhp which is also in line with what others think. Just guessing. That's also power across the whole board not just peaks. The ms3 cam you have likes to be revved. Your exhaust is hindering with this.
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Old 01-19-2019, 03:40 PM
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^^^^^ I think you stated the situation as well as anyone could. I agree that putting the cutouts onto his single exhaust, would be the best solution for the time being, with true duals when budget permits. Good plan!
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Old 01-19-2019, 11:24 PM
  #59  
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Originally Posted by SoFla01SSLookinstok View Post
What it really comes down to, & has been stated, is a high performance 5.7 V8 is not going breathe well through a 2.5"-3" single exhaust. No matter really what muffler as you will see some differences swapping around. But you still have the long single 3" pipe that is going to cause back pressure. That only gets worse the more power the engine makes. My opinions. It seems to get the best of both worlds, & stay pretty low cost, the cut outs would probably be the best. Agreeing with others that have stated this. Next the SE true dual setup doesn't seem too pricey & shows good gains. TSP also has a true dual over the axle setup or the dumped exhaust. Going to dumped exhaust is a different realm & you don't seem interested in that.

It really is a line you have to walk when getting into performance/street. As there's always cost as well. On your car I would think the exhaust you have maybe holding you back 20-30rwhp which is also in line with what others think. Just guessing. That's also power across the whole board not just peaks. The ms3 cam you have likes to be revved. Your exhaust is hindering with this.
I have an electric cutout in my 3in mid pipe. It's too loud for my taste to run it like that....
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Old 01-20-2019, 09:48 AM
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The magic of a cutout is you can open and close it.
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