is the flexpipe necessary?
 

ok so after my downpipe most cars have that flex pipe section right...i don't have that yet do i really need it?

Re:is the flexpipe necessary?
 

depends, how good are your motor mounts?

Re:is the flexpipe necessary?
 

It is if you dont want your exhaust to crack.

Re:is the flexpipe necessary?
 

pretty much what i was getting at, sometimes people with solid motor mounts can get away with not having one though

Re:is the flexpipe necessary?
 

I say its a must.. I had pretty solid mounts and my exhaust hangers would always break.

Re:is the flexpipe necessary?
 

They are fairly cheap on Ebay, or from your local exhasust shop.

Re:is the flexpipe necessary?
 

I use a flexpipe, but if you use those Factory Honda spring bolts that origionally connected your cat to your header pipe, do they do the same thinge essentially?

Re:is the flexpipe necessary?
 

yup but you have to use the "ball socket" flange setup, And most of the factory ball socket flanges are really small around 2 1/4 and maybe 2 1/2. So I normally use standard 3in flanges (flat) with no cat convertor.

http://www.roadraceengineering.com/p...ns-covered.jpg

These babys are you friend =)

Re:is the flexpipe necessary?
 

Very true 8) I've alway's had flexpipes in my setups and never had any exhaust problems (except for that SSauto mani, but thats another story).

Re:is the flexpipe necessary?
 

best place to source these???? how much??

Re:is the flexpipe necessary?
 

I went to the local autoparts store here for one and they quoted me over $100. I don't remember the exact ammount but I almost ---- myself :-\ I ended up finding some good ones on Ebay for like $25.

Re:is the flexpipe necessary?
 

Their is no need for a flexpipe, Open downpipe owns all. Its also a lot cheaper 8)

Re:is the flexpipe necessary?
 

and also scares women and small children

Re:is the flexpipe necessary?
 

^ HAHA...

at my local muffler shop they sell them for like $40 canadian haha i guess i'm gonna have to get one or look on EBAY, thanks.

Re:is the flexpipe necessary?
 

believe it or not, but when i had only my DP on, (running stock boost) i maxed out at 7psi, it sounded like a UPS truck, and was laggy as hell on the bottom end.

so then i decided to hook up my 2 1/2", no cat, flowmaster w/ dual outlets, and bottom end increased dramatically. not touching a damn thing, i was now peaking @ 10 psi and leveling @ 9psi, and my friend said it sounded like a german sportscar.

now this is only going on my experience, yours is prolly different.

to stay on topic, go w/ the flexpipe or ball gaskets!

mike

Re:is the flexpipe necessary?
 

this shows that breaking up the gasses is important

plus, back pressure owned you 8)

Re:is the flexpipe necessary?
 

hmm thats werid, it usually works the other way around. Everytime I've ever ran open DP it usually increases spool time.

I also 2nd the open DP, its really not that loud on a honda/acura 4 cylinder.

Re:is the flexpipe necessary?
 

Damn, big ballers in here. :P I go to Checker and buy the exhaust repair kit with an 18" flex pipe and a clamp for $7.99 :P I've got two of those bad boys on my car right now. 8)
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Re:is the flexpipe necessary?
 

Dr.boost aka Dr.Hack :-X

Re:is the flexpipe necessary?
 

Backpressure on a turbo is bad. The best exhaust for a turbo is no exhaust. Actually if you could hook up a vacuum cleaner to your exhaust it would be the best.

Re:is the flexpipe necessary?
 

----, my setup is top notch sucka. This is the first setup I've ever had that I started with no open downpipe. I have a full exhaust with a muffler and everything. :)
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Re:is the flexpipe necessary?
 

LOL good ---- right their ;)

Re:is the flexpipe necessary?
 

im confused??. there is this kid in my area with an eclipse and i dont know his set up is weird i cant figure out if its a greddy kit or what cause the intercooler says greddy but he prob just bought a greddy intercooler but anyway. he did some custom ---- and he has like and acutal muffler sticking out of his front bumper then he has the regular exhaust. what the hell is the one in the front from. whatever it is it sounds like crap. worse than a ------ ups truck.

Re:is the flexpipe necessary?
 

thats an external open wastegate that you hear

Re:is the flexpipe necessary?
 

ok thanks whitey. cause i can always hear that POS driving around. i like the sound of my rex with a short ram and header with no exhaust better and even that sounds bad. maybe its just the way he did it. it really does sound like he's driving a truck.

Re:is the flexpipe necessary?
 

hmm this would be an interesting project :P

Re:is the flexpipe necessary?
 

hooking up a vacuum to your breather is also benificial ;).

I didn't have a flex pipe, I drove about 1500 miles with no flex pipe, no problems there. My new downpipe is not gona have a flex pipe either. O ----, i just realized as I was typing the last sentence that thats probly the reason why I kept blowing DP gaskets. Ok never mind, run a flex pipe. ;D

Re:is the flexpipe necessary?
 

Are you saying that jokingly or are you serious? Cause you know that is true, it frees up horsepower.

Re:is the flexpipe necessary?
 

When I ran open DP, my boost would creep like crazy. I now have a 2.5" exhaust with dynomax race muffler (basically a silencer). Before this exhaust, I had 2" pacesetter that restricted overall flow, but I had more low-end torque for sure. With the 2.5" race exhaust, I can hear the turbo spool much better, but it doesn't pull very well down low, but I have a much harder pull on top-end.

Re:is the flexpipe necessary?
 

that would melt the ---- out of the vacum cleaner haha

Re:is the flexpipe necessary?
 

::) :-X

Re:is the flexpipe necessary?
 

I was saying it seriously, but as a joke. It creates a suction in the crank case and pulls the rings hard against the cylinder walls. Big block guys and the motorcycle drag dude use them alot. I'm hooking up a vacum motor to the breather of my v6 minivan, it bunrs alot of oil :(