172/182 exhaust manifold

[robi1000]

I know this has been asked before, but there's no definitive answer...

I know I would have to modify the flange on the manifold, but otherwise would it fit?

I found an old thread where sideways danny said there are some PAS pipes in the way. Would this be an easy mod or a complicated one (I don't have a 172/182 mani at hand to measure and do a trial fitment).

Reason why I'm looking into this is because 182 manifold looks strikingly similar to original Clio Maxi manifold. I need one, because my new engine will have hard time breathing through original manifold, but new Clio Maxi manifold is €€€, so I'd like to cut some corners... :oops:

I know that 172 and 182 manifolds are different, would fitment still be the same?

Just look at it!
http://www.ebay.co.uk/itm/RENAULT-CLIO-SPORT-172-182-EXHAUST-MANIFOLD-2-5-/110616614324

[ThRaXaIR]

pardon my ignorance... BUT isnt the problem with this the fact that the f7r block is a 2inch outlet where as the 172/182 exhaust is 2.5inch bore...

so surely even if you change the flange that end its going to be of zero use to you...

i dont know all this 100% but i'm wondering... :D

[sideways danny]

pas fitting and line to the center of the rack is in the way. the head flange sits at a different angle. The oil pump housing fouls, starter motor fouls (use a 172/182 one) and the 2 branches of the 182 manifold are wider than the gap in the mk1 tunnel.

172 ARB would also be desirable to give some clearance

probably more things too, thats as far as I got.

Can buy my modded 172 manifold if you like Robi

[robi1000]

Would oil pump housing be a problem on a 714 block (it's almost non existant on 714 block IIRC)?

There's probably no way around the problem that those two branches are wider then the tunnel?

Flange angle can be modified (I would have to make a new flange to fit it on F7R ports anyway, due to different shape). PAS line problem could be solved by using electric servo pump.

PM'd about mani...

[robi1000]

pardon my ignorance... BUT isnt the problem with this the fact that the f7r block is a 2inch outlet where as the 172/182 exhaust is 2.5inch bore...

so surely even if you change the flange that end its going to be of zero use to you...

i dont know all this 100% but i'm wondering... :D

2.5'' bore is just a plus, because whole exaust system will be custom made anyway, so all my options are open.

[ThRaXaIR]

and the benefit of butchering a mani and moving all that stuff is?! :P

[robi1000]

Good exhaust manifold for fraction of the price of a new Clio Maxi manifold?

[ThRaXaIR]

Good exhaust manifold for fraction of the price of a new Clio Maxi manifold?

yeah.... and the bonus of a 'maxi' exhaust is? :P and yeah the whole exhaust maybe 2.5 inch bore but doesnt that mean you have to machine the block as its only 2inch?

[robi1000]

There is no bonus on standard engine. My engine is however a bit modified and would benefit from uprated exhaust manifold.

I will change it anyway, but I want to explore different options and maybe we all benefit in the process.

[sideways danny]

Good exhaust manifold for fraction of the price of a new Clio Maxi manifold?

yeah.... and the bonus of a 'maxi' exhaust is? :P and yeah the whole exhaust maybe 2.5 inch bore but doesnt that mean you have to machine the block as its only 2inch?

:?

standard manifold branches are a smaller bore than the port. Truly terrible manifold, I don't think you could do much worse with drinking straws. Think i measured them at 30mm a while back, and that's where they're not squashed. 172 and 182 manifolds are both brilliantly designed which is why there are no aftermarket upgrades available.

I fitted a megane F7R manifold to my car (now for sale also) and the improvement was instant over the williams shower of shit.

manifolds are not 2.5 inch, ports are not 2.5 inch.....LOL!!!!!

[ThRaXaIR]

As i said i know nothing... ok thanks for explaining its been enlighteningl. :D

I now know about manifolds.

[walters300]

very interesting :) would a 172 mani be better than a supersprint?

[Wobba]

very interesting :) would a 172 mani be better than a supersprint?

Getting it to fit is the problem. As discussed above. Dan has experimented with the setup, I am sure it can be done, but it is hassle.

[2 live]

i think i know where a custom 4-2-1 mani could be bought if your interested. s/s, more along the lines of the 1*2 design, with the 2 centre ports being seperate from the 2 outer ports also. dunno how much hed want for it tho tbh.

[cliokongen]

Robi - build your own manifold....
You can fab one...

Use your own specs, fitment will be better, diamater of the primaries and secondary tubing is for you to decide. 4-2-1 or 4-1... Lenght etc... you decide... Surely you can build something which will flow better than the std. manifold. Use the 182/172 and maxi manifold to find inspiration.
I have a Megane Cup manifold you can have a look at too. Sizes of tubing etc. i can maesure.

Michael

[robi1000]

I was already playing with the idea of making my own exhaust manifold, but I'm trying to find the best price/performance(/looks) solution. If it costs me 600€ in the end, I might as well buy original Orbisoud Megane Maxi manifold. Not to mention I don't want lobster style manifold. :)

From experiance, I can't see how I could make it for significantly less (I'm not interestd in saving 100-200€) if I make it from a good material, so it's either modified 1*2 manifold or something good but used for a very good price, or I rather save until I can afford to buy something really good. Because after all the money I poured in this car it really makes no difference spending 100€ more or less...

Also when I'm engineering things I tend to over-engineer them, so it would probably end costing a fortune (khm, Inconel manifold would cost around 2k€...;))

[robi1000]

I heard Megane Cup manifold is quite popular in France and it's supposed to give good gains. But it's 4-1 isn't it?

[walters300]

I am sure if you get the basic manifold and a welding set you will get there, maybe not the first time :? but maybe the second and it will be cost effective and far more pleasing to do it yourself :wink:

[sideways danny]

I'd just buy one personally, the mild steel manifolds are a bargain now!!

[walters300]

one like yours you mean :P definitly cheaper and less hassle if its made to suit the williams already..

[cliokongen]

I heard Megane Cup manifold is quite popular in France and it's supposed to give good gains. But it's 4-1 isn't it?

Yep - 4-1.... Nice size internal diameter...

Michael

[robi1000]

It is more pleasing DIY, but I pleased myself too much in the last year and I really want to drive the car for 2012 season (I said this in the beginning of 2010...). :lol:

[walters300]

:lol: 2014 is my target date these days, you have been hard at it in fairness and your still not finished :P buy that manifold or put it on a wish list for afterwards, get it rolling with what you have and improve the wish list bits later otherwise it will be 2020 before its done!! :wink:

[16v_paddy]

It is more pleasing DIY, but I pleased myself too much in the last year

:shock: is that even possible? :lol:

[robi1000]

:wink: -> :shock: -> :lol: -> 8)

[volymmannen]

I'd just buy one personally, the mild steel manifolds are a bargain now!!
where from? price?