True Duels??? - Ranger-Forums - The Ultimate Ford Ranger Resource


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

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Old 10-18-2009
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True Duels???

I have a 04 SOHC 4.0 and i was thinking of doing a muscle truck style side exit with duels and i was looking under the truck the other day and noticed that it seems like i have two cats then the pipes go into one pipe and another cat it seams... Is that another cat or is it a resonator?

Also what muffler should i use i was thinkin flowmaster but not sure what series to use?

Also i have this cross over thing that a guy at work gave me ===x=== it looks kinda like that... Its like two 45s welded together and a oval hole in the pipes and apparently it does something with the suction to help pull the gas out somehow... He has one on his monte carlo he got from Dr. Gas... He said it added like 15hp and also some Nascar drivers use it. Also Chrysler puts it on there performance models...... Should i put it on there too??
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Old 10-18-2009
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I think it is to make the pressure in both pipes the same.
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Old 10-18-2009
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i would personally save true duals for v8s.

flowmaster would be good. 40 or super 44 sound do fine

that seems like an x-pipe, its helps balance out the exhaust gas back pressure. looks cool as hell. im trying to talk my buddy to get it with cutouts on his project skylark
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Old 10-19-2009
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do it i want to do this to my truck too but im poor right now lol super 44 FTW
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Old 10-19-2009
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id say magnaflow i have a 3.0 and it sounds good i think it would sound even better on a 4.0
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Old 10-19-2009
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if your model has 4 cats just Y-pipe it with duals. Sounds Great on the 4.0 i had a 40 series before and it sounded alright 2 just quieter.
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Old 10-19-2009
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Quote:
Originally Posted by Downey View Post
do it i want to do this to my truck too but im poor right now lol super 44 FTW
Yeah im poor now too...

Just trying to figure out what im gonna do next to my truck...



____

Also my truck it looks like my truck has 3 cats....
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Old 10-19-2009
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true duels.. hmm.. would this mess with the back pressure at all?
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Old 10-19-2009
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Im not sure if it would or not
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Old 10-19-2009
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If you do go threw with it make sure you use an H or X pipe to even the flow. If not it will hurt your power big time.
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Old 10-19-2009
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Okay lets start here everyone:

1. its true DUALS! A duel is a fight of sorts. ha.

2. You need back pressure, if you wanna go true duals you best go header back and get all high flow cats and things of this nature. I personally like Zachs exhaust setup which is a header back.
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Old 10-19-2009
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Quote:
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Okay lets start here everyone:

1. its true DUALS! A duel is a fight of sorts. ha.
Thanks I was just about to post this.
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Old 10-19-2009
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hahaha sry
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Old 10-19-2009
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Thanks I was just about to post this.
Well the tittle i was okay with it, but after reading like 3 replies using it wrong I had no choice.
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Old 10-19-2009
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Haha my Bad i didnt even think abut it... Firefox said it was spelled right but it doesnt have a dumb @$$ feature so sorry for the wrong spelling... I am forever spelling it duel instead of dual
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Old 10-20-2009
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DO NOT go bigger on pipe dia if you do go true duals. I run a true dual 2.5" from headers back, mag cats, Dr. Gas X, Flow 44`s, exiting before left and right tires. Killed my torque. Truck is much slower now and I`m sc`d.
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Old 10-20-2009
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run like 2 inch exhaust at the biggest
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Old 10-20-2009
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run like 2 inch exhaust at the biggest
Id say he would be ok sticking with the factory 2 1/4.
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Old 10-20-2009
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^^^ not with running true duals 2 inch would be better to keep some back pressure
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Old 10-20-2009
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The 4.0L is a short stroke engine. IMO if you have a stock long block.. keep the "Y" to maintain the stock backpressure. Do what ever you want to downstream of it.. which will sound good and relieve a bit of BP.

Opening up both sides IMO will only serve to raise the TQ curve. And on a stock short stroke engine in a pickup.. that's the opposite of what you want to do.

Rich
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Old 10-20-2009
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I wouldn't do true duals on a V8 let alone a V6.
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Old 10-20-2009
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why wouldnt you do them on a v8?
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Old 10-20-2009
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Quote:
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why wouldnt you do them on a v8?
What for? You lose a lot if not all exhaust scavenging.
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