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4.0L OHV & SOHC V6 Tech General discussion of 4.0L OHV and SOHC V6 Ford Ranger engines.

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  #1  
Old 04-08-2005
optikal illushun's Avatar
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Exhaust questions

what size is stock on the rangers? looks like 2.25. whats the optimium size to use? reason i ask is sarah is looking into an exhaust for the edge and im lookin up muffler prices. she wants a single in, dual out muffer and i was thinking 2.25" in with dual 2" out. sound good?
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Old 04-08-2005
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yep, you got out, thats perfect, with dual, the 2" is great, i had 2.5" which i think was alittle much.

And you are correct on the 2.25" stock.
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Old 04-08-2005
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Bills 4.0L was 2" stock piping...dont go over 2.25 piping for duals its not needed
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Old 04-08-2005
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get 2.5 from the cat to the muff and 2.25 from the muff out, you'll gain a little torque cause of a little more backpressure. I'm running that with a flow reg 40 series
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Old 04-08-2005
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^^^ive got what he said. when i put it on i swear i coulda raced a mustang (not with as much money in it as chris johnson's T/A ofcourse...bwahaha!!) and at least kept up.
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Old 04-08-2005
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I kept up with a new turbo PT cruiser when I got mine installed... well up to 90mph, and that was back on street tires lol.
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Old 04-09-2005
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thanx leo. if she decides on single, i assume single 2 1/2 is fine...?
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Old 04-11-2005
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me too^^^ 2.5 to the 40 series and 2.25 duals with 3inch tips, and lovin it
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Old 04-12-2005
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Has anybody tried just cutting the muffler off and goin with straight pipe out to dual tips?
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  #10  
Old 04-12-2005
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i wondered that also but no one has a sound clips. the sticky on GE comparing exhaust sounds is MIA.
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  #11  
Old 04-12-2005
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cut off the muffler you lose torque and slo you kill the planet too....
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Old 04-12-2005
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I called muffler king today and they said for a flowmaster system, 2.5 in 2.25 out single in single out to a y split into two stainless tips would run $330. Does that sound about right because ive got a friend with a tundra who got a full si/do flowmaster setup for about 300, am i gettin ripped off?
And whats the best pipe size set up for the most power gain?
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Old 04-12-2005
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Quote:
Originally Posted by PickupMan92
cut off the muffler you lose torque and slo you kill the planet too....
muffler has NOTHING to do with killing the planet. and i highly doubt u will loose any low end torque. u loose low end torque by decreasing exhaust gas velocity. back pressuse is evil, plain and simple. besides the cat system is enough to give some "back pressure". stepping up in exhaust pipe diameter is what kills low end power by decreasing volocity.

Quote:
The standard for exhaust diameter is to not run too large of exhaust, for the engine needs a certain amount of backpressure. This is correct in the sense of one should not run too large of diameter exhaust tubing, but the statement of the engine needing backpressure is not. You need to have the least amount of backpressure possible to produce maximum power. Too large of diameter exhaust will cause a power loss and loss of low end torque because a larger pipe has less exhaust stream velocity than a smaller pipe. If the exhaust pipe is too large, then the exhaust flow will be slowed with less velocity.
http://www.proficientperformance.com...k_pressure.php

Last edited by optikal illushun; 04-12-2005 at 10:54 PM.
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  #14  
Old 04-12-2005
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heres no cats with a flowmaster 40 si/do 2 1/2" mandrel bent before, 2 1/4" after muffler to 3 1/2" stainless tips.

i paid 318 for a cat back and went back and paid 145 to get the cats off (4 of them). i talked to the guy and he liked me i guess so the first time he cut me a deal, then when i went back he seriously cut it back (charged my friend 200 to get his off)
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  #15  
Old 04-13-2005
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mm my catback single in dual out behind the rear tires was like 280. im SSO happy with it i guess i would have even payed 320 or 330
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Old 04-13-2005
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^^^^^ Ya 280 was about what i was thinkin. So 3 1/2 tips are good? i dont want too much popping goin on. annnnd, how loud is the hum in the cab with the flowmaster?
How much hpw do ya'll think youve gotten out of exhaust
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  #17  
Old 04-13-2005
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5 maybe 8 at the most and 10-12 lb-ft torque.
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  #18  
Old 04-13-2005
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i forgot to post the link in my last post

http://www.putfile.com/media.php?n=exhaust60

^^there she is.
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  #19  
Old 04-13-2005
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Quote:
Originally Posted by loneFX4
heres no cats with a flowmaster 40 si/do 2 1/2" mandrel bent before, 2 1/4" after muffler to 3 1/2" stainless tips.
Out of curiosity, what did you do with both of the o2 sensors from the cats?
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Old 04-14-2005
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^^^the o2 sensors had new holes drilled and i was going to get o2 simulators but the engine light hasnt come on so i have yet to get them. my do it one day just to make sure everythings alright.

and im pretty sure there was only one on my truck and i remember seeing it before the cats, wierd.
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  #21  
Old 04-14-2005
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ur truck has 2 if not 3 o2 sensors because its OBD-2. the forward one is the upsteam to moniter engine efficency and always toggles to tweak the A/F ratio. the down stream o2 sensors are to moniter catalyst efficency and usually dont toggle much unless ur cat is fubar'd.

regardless u need the upstream o2 sensor, no if ands or buts about it. ur engine will run like **** or not run at all without it. the downstream o2s are not required but i wouldnt touch them.
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Old 04-14-2005
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Quote:
Originally Posted by loneFX4
^^^the o2 sensors had new holes drilled and i was going to get o2 simulators but the engine light hasnt come on so i have yet to get them. my do it one day just to make sure everythings alright.

and im pretty sure there was only one on my truck and i remember seeing it before the cats, wierd.

is the bulb burnt out? i would think that you truck wouldnt run very good like that.
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  #23  
Old 04-15-2005
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"is the bulb burnt out? i would think that you truck wouldnt run very good like that."

I had mine out to change them this past weekend , I thought it might have been why my engine was ideling so pootly after I overheated.. Maybe carbons burned on them or something.. Sadly.. Without the sensors, It didn't want to idle at all.

Methinks they ( more or less ) have to be there or some type of simulator. I'm no OBDII pro, but I will see what happens this weekend when I finish what I'm doing. I have to change plugs and will be under there anyway.

D.
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  #24  
Old 04-15-2005
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Who used Borla exhaust? Because if they got a si/do i want to know what model number. I've looked all day so far.
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  #25  
Old 04-15-2005
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The borla si/dos are the pro xs series. You can get a 2.5 in and dual 2.5's out. The only other one i found was the turbo xl with a 3 inch in and dual 2.5s out.

Leo told me to check on ebay and you can find lots of them at good prices. Just do a search on borla muffler.
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