Mandrel vs Press Bends

I'm not recommending either, but I'm posting this for the sake of ppls on a budget

 

well i thought anyone on a budget has to go for pressed bends,anyone not always goes mandrel bends anyway ,strange thread but interesting figures all the same
I like this quote " type of bend used is almost insignificant "

 

Realistically, as long as the I.D of the tube is not too deformed, bigger restricitons will be had in the welds, cats and flanges throughout the rest of the system.
How many bends would go past 45 degrees in a zed anyway? Dumps / headers to pre-cat piping wouldn't be that acute...

 

So a 90° elbow flows better than 45°? :whatever: pull the other one

 

autospeed have some good comments about this..

http://autospeed.com/cms/A_2711/article.html

 

Wow this is being discussed again? Mandrel bent or nothing, simple. Cant afford it? Then wait until you can.

 

is it being discussed again....again who cares if it is...this is why we have this forum for people to discuss stuff......yeh i understand you know everything but not everyone does............fark....go right a book on cars...

and what you mean mendrel bent or nothing.....look at the figures, there is really hardly any difference.....wow instead of 250 rwkw you will make like 249rwkw.....

 

*yawn*

Go rip off a stock exhaust system and just look at it. Press bent rules y0!

 

im curious how old you are 300zxt ? you seriously sound like a 15 year old on this forum...

 

You guessed it, I'm 15.

When shit is repeated a thousand times, you churning out nothing but autospeed articles and so on how am I supposed to talk? If a few people get upset in the process then Im sorry, but the whole press bent vs mandrel bent arguement is just silly.

It was discussed not that long ago in great depth, and everyone involved including experts who work at exhaust shops do not disagree with the FACT that mandrel bent is better. As for being on a budget, then I suggest to wait until you can afford a proper system rather than going with a press bent system. You might aswell not even upgrade the exhaust at all if being on a budget is a real concern by the time you factor in cats, mufflers etc.

 

there are many many forum users who have been here for manyyyyyyyyyyyyyyyyyyyyyy years and yet you dont see them going on about things coming up again like you do. take wykked for example, he has pretty much been here from the start, till now he still gives good advise where ever possible and helps in any way possible. imagine the repeating threads he looks at that have come up so many times since he started here. seriosuly i think you should wake up and stay out of threads if you dont have anything helpful to say. if the thread has come up again maybe help with finding some links or threads and link it to the person. its what a forum is all about....

and for pointers this thread was not a person asking which should i use etc? mattz was just giving some information out he had found.

:banned: :banned: :banned: :banned: :banned: :banned: :banned:

 

And churning out autospeed articles like there's no tomorrow is helpful? Cmon! People are going to come on here and see mulitple threads claiming press bent is as good as mandrel bent when it's already been discussed in great depth that it's not. If anything I'm being very helpful. Why waste money on a press bent system when for not even much more you can get a proper mandrel bent system? That's the point.

Honestly this is just stupid, the fact it's even disputed is just laughable. I'm not the one who needs to wake up, other car enthusiasts who stumble onto this forum must piss themselves laughing at some of stuff discussed on here.

 

sound suspicious to me too, until you have a think about it.

1% here
0.72319% there

Don't you think that successive dyno runs have other variables such as heat soak or many other things?

so the real point, is not the minor percentage difference, but that the implied difference is SFA

babelfish translater converts SFA which is in French, to shit fark all in english

whether or not the data is accurate, i don't know
whether or not the author was making it up, cos he had press bent and he didn't want to be the only one? i don't know

it was merely a post FYI


edit: i just re-read my original post, looks like it wasn't on a dyno
I don't really care
anyways, i won't be averse to putting a small bend in my exhaust

 

Dont get me wrong, I'm not trying to chew your head off as much as Chad and others like to make me out to be the big bad wolf. They honestly need to be bitch slapped! lol

I have spent ALOT of time studying turbocharged vehicles, working on them, conversing with people with ALOT more experience than I or anyone else I know personally has and the end result is always the same regarding this topic in particular. I dont pull things out of my ass, nor do I make shit up. When I'm wrong I'll gladly admit it, but some of the stuff on here is just ludacris sometimes and it takes a firm word to knock it out. Again no offense intended, but there's only so many times you can beat a dead horse before shit starts coming out it's ass.

 

Like how that 300zxt guy ALWAYS starts a fight in every second thread? Seriously, the amount of times you've stirred up a debate on this forum is simply "ludacris".

Anyway, the Autospeed article proved that, yes, mandrel-bent systems do flow better than a press-bent system. There, you win. The point they were making though, was that the difference between the two was so marginal that the average punter would scarcely notice any benefit from mandrel bends and that the money saved from using press bends would be better off directed towards other areas of the car. That's all.

You're still free to use a mandrel-bent exhaust, and people will still go, "Cool, mandrel bends" whenever they look under your car, but that doesn't mean any of us should look down on another enthusiast just because they chose a slightly inferior system. It's just elitist and is not what this community should be about.

'nuff said.

 

Are you saying that nobody will notice the difference between a stock exhaust system vs a full mandrel bent system? What a crock of shit. The difference between the two is huge. There is no context for half of these comparisons. Run 20psi of boost on a stock exhaust system vs a full mandrel bent system and then come back and try to tell me that the difference is only marginal.

Thanks for supporting my point perfectly. If there werent so many inane topics discussed on this forum I wouldnt have to be such a prick. Wake up and smell the bs...

 

You don't HAVE to be a prick. Nobody is forcing you to reply to these "inane" threads, you just choose to.

Anyway, why should anyone be judged negatively because they elected to get a press-bent exhaust fitted to their car? Personally, I can't stand Veilside bodykits, but I'd never give somebody a rough time just because they thought it made their car look nice.

Look, this isn't a personal attack on you, but consider this: if you don't respect other people's ideas and opinions, how are we meant to respect yours? There are better (and less confrontational) ways of making your voice heard...

 

i think what he meant was comparing a 3inch mandrel bent system to a 3inch press bent system. not comparing a stock system to another system. :banned:

what makes me laugh is that you have something stupid to say about almost every topic here and you complain about every1 talkin bullshit yet you still post in the threads???

 

Im about to get my exhaust put together.

Im not concerned if its press or mandrel. A 2.5" is more than sufficient for my NA. A fractionally minor increase in turbulent flow around a bend isnt going to be an exhaust limit.

 

Yeah you're right, why correct bad information. We should just let everyone believe that the Australian 300ZX community consists of complete dumbasses who think press bent exhaust systems are as good as mandrel bent exhaust systems when it comes to turbo cars. Silly me, I'm going to install a press bent exhaust system on my car right now with 4 cats because I believe everything I read on here no matter how wrong it is. And since nobody corrects anything because everyone is soft and cant take direct criticism, then how am I to know any different! Right? Street legal high performance turbo cars run 4" mandrel bent exhaust systems just to show off I'm sure...

If that decision was based off piss poor information that this forum sometimes provides then they shouldn't be judged negatively no. At least if both sides of the coin are presented then they can make the choice for themselves. For those with some mechanical experience the answer is totally obvious and they wont even bother reading threads like this in the first place. Just go do a search, this was discussed before and apparent exhaust experts even agreed with what I'm saying. The price difference isn't even that great between the two in the first place, so it's hardly a cheap alternative. And if price is such an issue and you want to save a few bucks then source the bends yourself. I bet any money if someone sourced all their own mandrel bends and supplied them to the exhaust shop that the system would be cheaper at the end of the day vs a press bent system made from scratch anyway.

It's not about other peoples ideas and opinions, it's about what's right and what's wrong.

What makes ME laugh is that if you actually read half the crap you quote from autospeed then you would see that I'm 100% correct. Stick to your "tech articles" about undoing bolts. And with two identically routed systems, one being press bent and the other mandrel bent, there WILL be differences more so with turbocharged cars. Again search, this has been confirmed by other exhaust experts in the previous thread about this stupid topic.