This is topic cut outs on flowmasters? in forum Tech Talk at Northern California Ford Owners  .


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Posted by morespeed (Member # 6717) on :
 
2 chambered flows...will cut outs make more horsepower?

[ January 11, 2007, 02:23 AM: Message edited by: morespeed ]
 
Posted by Quick 88LX (Member # 1950) on :
 
Depends on what your combination is. If you are near stock, cut-outs will actually hurt performance.
 
Posted by morespeed (Member # 6717) on :
 
shorties,off road x,2 chambers.

I was thinking make the cut outs and then thread in a plug.
 
Posted by Quick 88LX (Member # 1950) on :
 
Are those the only modifications to your entire engine? If so, cut-outs really aren't needed.

However, if you plan on doing big modifications down the road, installing threaded plugs OR the electrical/mechanical cut-outs is an option you might want to think about.

Personally, I think cut-outs sound like crap. I would take a 3" muffler on a turbo 377ci small block any day.

...Not that I plan on building such a combination [Big Grin]
 
Posted by HaulinAss Motorsports (Member # 541) on :
 
what do you need cutouts for? your not going to gain anything noticable but a bunch of noise.look into getting a better muffler as the flowmaster line is old technolgy.
 
Posted by morespeed (Member # 6717) on :
 
I don't want to spend money on mufflers right now. I was thinking to do the cut outs. 4 more horsepower? 2 hp per muffler?
 
Posted by Eddie306 (Member # 2354) on :
 
spintechs the way to go if you want to see an increase

[ January 11, 2007, 08:01 PM: Message edited by: Eddie306 ]
 
Posted by HaulinAss Motorsports (Member # 541) on :
 
quote:
Originally posted by morespeed:
I don't want to spend money on mufflers right now. I was thinking to do the cut outs. 4 more horsepower? 2 hp per muffler?
The amount of money you are going to spend on cutouts and installation would be better spent on a real set of mufflers.and im not following you on the 2hp per muffler comment.I picked up 3/10's off JUST a muffler change [Wink] FLOWMASTERS are garbage and the run of the mill ones arent rated for anything making power.
 
Posted by morespeed (Member # 6717) on :
 
no money... still paying for the clutch.

labor isn't an issue. how much would the plugs cost at home depot? $3-$4.00.
 
Posted by 95whitegt (Member # 3205) on :
 
i would listen to haulinassmotorsports
 
Posted by HaulinAss Motorsports (Member # 541) on :
 
quote:
Originally posted by morespeed:
no money... still paying for the clutch.

labor isn't an issue. how much would the plugs cost at home depot? $3-$4.00.
do your thing then,just trying to give you some advice.it sounds like you already have your mind set on doing them.........good luck [Wink]

EDIT:

I was under the impression you were getting "REAL" cutouts from Flowtech,MAC etc,ya know an exhaust company....These go inline before the muffler and are the diameter of your exhaust.You simply pull the cutout cover off or there is a setup where you can do it with a cable ran to the inside of the car.Thats why I said it would cost just as much or close to getting REAL MUFFLERS [Wink]

I have NO IDEA what your trying to do but it sounds pretty rigged if you ask me,but what do I know [Razz]

[ January 11, 2007, 10:42 PM: Message edited by: HaulinAss Motorsports ]
 
Posted by Motorhead6T5 (Member # 4969) on :
 
Ditch the muffler,Just have the exhaust extended out to the rear. Wala ...cheap slp loudmouth exhaust.

Edit: You could even take your stock axle back down there and have them hack the muffler off and replace it with pipe.

[ January 11, 2007, 11:52 PM: Message edited by: Motorhead6T5 ]
 
Posted by HaulinAss Motorsports (Member # 541) on :
 
quote:
Originally posted by Motorhead6T5:
Ditch the muffler,Just have the exhaust extended out to the rear. Wala ...cheap slp loudmouth exhaust.

Edit: You could even take your stock axle back down there and have them hack the muffler off and replace it with pipe.
backpressure is a neat thing,keep the mufflers! [Wink]
 
Posted by Motorhead6T5 (Member # 4969) on :
 
quote:
Originally posted by HaulinAss Motorsports:
quote:
Originally posted by Motorhead6T5:
Ditch the muffler,Just have the exhaust extended out to the rear. Wala ...cheap slp loudmouth exhaust.

Edit: You could even take your stock axle back down there and have them hack the muffler off and replace it with pipe.
backpressure is a neat thing,keep the mufflers! [Wink]
A lot of people run a o/r h or x with slp and have good results,which is basicly what he would have. Its just loud and sounds like garbage.
 
Posted by lostsoul (Member # 5797) on :
 
I have the SLP's with the stock pipes and cat.. = sounds good.. I heard others that took off the cats and sounded too loud and crappy. We are in California.. thats illegal [Big Grin]
 
Posted by morespeed (Member # 6717) on :
 
all I was thinking is those little bumps on the back side of the muffler... cut them out thread in a plug. pull the plugs out whenever I wanna run it.

???
 
Posted by HaulinAss Motorsports (Member # 541) on :
 
quote:
Originally posted by morespeed:
all I was thinking is those little bumps on the back side of the muffler... cut them out thread in a plug. pull the plugs out whenever I wanna run it.

???
and that would do what for you?
 
Posted by BUKSING (Member # 6594) on :
 
i finally got what this guy is tryin to do... he actually wants to put an additional hole in the back of his flows... thats hella rigged... dont do it. just add dumps(turn downs)..way more better and practical for what you are trying to do.
 
Posted by morespeed (Member # 6717) on :
 
I don't know what it would do. that was why I was asking. I was hoping for a little more flow.
 
Posted by Daniel50 (Member # 5629) on :
 
you already have plenty of flow for you horsepower level. the exhaust is not holding you back
 
Posted by 92stangLX (Member # 3252) on :
 
quote:
Originally posted by morespeed:
I don't know what it would do. that was why I was asking. I was hoping for a little more flow.
This isn't worth the effort. You will gain nothing and ruin a set of mufflers.

If you are looking for free/cheap HP there a plenty of other tricks you can do.
 
Posted by HaulinAss Motorsports (Member # 541) on :
 
quote:
Originally posted by 92stangLX:
quote:
Originally posted by morespeed:
I don't know what it would do. that was why I was asking. I was hoping for a little more flow.
This isn't worth the effort. You will gain nothing and ruin a set of mufflers.

If you are looking for free/cheap HP there a plenty of other tricks you can do.
exactly!
 
Posted by Motorhead6T5 (Member # 4969) on :
 
If you are gonna do it,do it right...

http://store.summitracing.com/partdetail.asp?autofilter=1&part=SUM%2D670136&N=700+4294923429+4294920534+115&autoview=sku

You will gain no power though. Their was a dyno test done with stock,no mufflers,and every aftermarket muffler. There was no gain more than 2hp between any of them.

Do you have under drive pulleys yet? Those give a bit more punch,somthing you can actualy feel and record on a dyno. You could always up the shot if you do it smart.
 
Posted by Eddie306 (Member # 2354) on :
 
spintechs bro, listen to castro bro. your doing one of them mexican power gains.thats a nono
 
Posted by CMELEVU (Member # 2563) on :
 
When it comes to bench racing/dyno, my friend is a pro. He's going with these, http://store.summitracing.com/partdetail.asp?autofilter=1&part=WLK%2D17223&N=700+4294923429+400358+115&autoview=sku

supposedly they flow 2200cfm. I dont think running an open exhaust is going to be very ear friendly in a street car. Plus I agree with some previous posts, on a stock displacement motor, back pressure is your friend.
 
Posted by HaulinAss Motorsports (Member # 541) on :
 
quote:
Originally posted by CMELEVU:
When it comes to bench racing/dyno, my friend is a pro. He's going with these, http://store.summitracing.com/partdetail.asp?autofilter=1&part=WLK%2D17223&N=700+4294923429+400358+115&autoview=sku

supposedly they flow 2200cfm. I dont think running an open exhaust is going to be very ear friendly in a street car. Plus I agree with some previous posts, on a stock displacement motor, back pressure is your friend.
Those are good mufflers(if you want to call them that,LOL) but WAY to loud for an everyday street driven car.If you want to make some power with a converntional turbo muffler hit me up and Ill get you going in the right direction.Anyone who has heard my cars know they are relitivly quiet for what they are.
 
Posted by HaulinAss Motorsports (Member # 541) on :
 
quote:
Originally posted by Motorhead6T5:


You will gain no power though. Their was a dyno test done with stock,no mufflers,and every aftermarket muffler. There was no gain more than 2hp between any of them.
not true.i have personally installed many exhaust systems and mufflers that have gained great numbers at the track and dyno on just those changes.3/10's is ALOT more then 2 hp.DONT beleive everything you read [Wink]
 
Posted by Motorhead6T5 (Member # 4969) on :
 
quote:
Originally posted by HaulinAss Motorsports:
quote:
Originally posted by Motorhead6T5:


You will gain no power though. Their was a dyno test done with stock,no mufflers,and every aftermarket muffler. There was no gain more than 2hp between any of them.
not true.i have personally installed many exhaust systems and mufflers that have gained great numbers at the track and dyno on just those changes.3/10's is ALOT more then 2 hp.DONT beleive everything you read [Wink]
05-07 stangs gain nothing from a axle back. The stock muffler is high flow,and the whole exhaust is mandrel bent 2 1/2" from the factory. Not talking about 5.0's [Wink]
 




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