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Mandrel Bends
Brett Jones - 24/7/13 at 08:41 PM

Hi All,

Does anyone know where I can get SS mandrel bends for an exhaust from? I looking for SS 1.75" 90 degrees bends with a centre line radius of 1.5" and 2"?

Thanks
Brett

eddie99 - 24/7/13 at 08:58 PM

Try Lance at http://www.ojzengineering.co.uk

SPYDER - 24/7/13 at 09:04 PM

OJZ dont do them anymore.

danny keenan - 24/7/13 at 09:06 PM

Yes he does I'm there every week or so.give him a call.im sure he will help you

Thanks

unijacko67 - 24/7/13 at 09:18 PM

+1, Lance also has some good articles on building your own manifolds on the web site.

T66 - 25/7/13 at 06:40 AM

Another option - Osprey exhausts, excellent friendly service. Good product



http://www.ospreyexhaustcomponents.co.uk/

Brett Jones - 25/7/13 at 11:54 AM

Thanks for all your responses, but I don't seem to be winning here.

@Danny, I phoned OJZ and told him I had been referred to him by you and he simply informed me that he's no longer doing any mandrel bends.

@T66, the bends that Ospray Exhaust have a centre line radius of 86mm which is over 3 inches and is too big.

Can any one suggest any other places?

Thanks

Myke 2463 - 25/7/13 at 01:02 PM

http://www.thebendshop.co.uk/mandrelbends.html

mikey p - 25/7/13 at 01:05 PM

got mine from good fabrications in biscester they have a huge amount of tooling to suit any need. I went thought a contact I know but ended up with a very good service and price which matched osprey but with a better choice and thinner wall tube

They do state no orders less than £250 but they can be flexible depending on work load.

loggyboy - 25/7/13 at 01:25 PM

Can mandrel bends go down to that tighter radius on such a small diameter?

You might need to go to a welded bend
http://www.ebay.co.uk/itm/Jetex-Universal-Exhaust-90-Degree-Welding-Bend-1-75-Stainless-Steel-/290614608071

[Edited on 25-7-13 by loggyboy]

coozer - 25/7/13 at 01:46 PM

Lean over to the dairy suppliers, google hygienic bends.. normally cheaper than auto suppliers.

http://www.hygienicsteels.co.uk/

beaver34 - 25/7/13 at 03:18 PM

+ for dairy bends that what i got for mine

marc n - 25/7/13 at 03:36 PM

quote:

Does anyone know where I can get SS mandrel bends for an exhaust from? I looking for SS 1.75" 90 degrees bends with a centre line radius of 1.5" and 2"?


as a mandrel bend you will get 1x diameter ( 45mm clr ) upwards any tighter and you will loose power especially on an s2000 as they are very susceptible to exhaust changes. for all our systems we use 1 1/2 diameter bends and only go 1x diameter if we really have to

cheers

marc

marc n - 25/7/13 at 03:38 PM

quote:

+ for dairy bends that what i got for mine


only problem with dairy bends is they tend to have pretty thick wall sections so reduce the id which looses you power, and it makes a complete manifold pretty heavy

cheers

marc

beaver34 - 25/7/13 at 04:00 PM

quote:
Originally posted by marc n
quote:

+ for dairy bends that what i got for mine


only problem with dairy bends is they tend to have pretty thick wall sections so reduce the id which looses you power, and it makes a complete manifold pretty heavy

cheers

marc


im on a turbo charged application, it is heavy but then its go a large turbo hanging off it so needed that strength

marc n - 25/7/13 at 04:26 PM

quote:

im on a turbo charged application, it is heavy but then its go a large turbo hanging off it so needed that strength


yeah agreed good for a turbo app as restrictions don't really come into the equation, but if you are replicating an s2000 exhaust manifold the dairy bends reduce the id too much and looses 10 - 15 bhp. would recommend a secondary bracket to engine to help with turbo weight as we have seen plenty of turbo conversions here where the weight of the turbo has stripped manifold studs and even snapped the tabs where the studs fit on bike engines ( especially on rage buggies )

cheers
marc

unijacko67 - 25/7/13 at 09:08 PM

Would it be an option to cut and splice the standard manifold. I also looked into making one but found it cheaper to buy a complete manifold (ebay) and modify it to fit. I was lucky as I got an aftermarket manifold, cheap (iust over £100 new from Chicago) which was not to bad to start with. I did however cut out all the crap joints, re position to fit my car better with good butt joints as they just ram them together then weld leaving lots of restrictive metal that the eye cant see on the inside.