arden head and big journal rods
Posted: Tue Dec 18, 2012 7:37 pm
Hi, has anyone fitted an Arden head to an engine with big journal con rods? if so what was requird to make them fit? Thanks alot
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arden head and big journal rods
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Re: arden head and big journal rods
Posted: Tue Dec 18, 2012 8:03 pm
it can be done by machining the rod way so the stud clears the cam, but its an unelegant solution thats far from ideal
Re: arden head and big journal rods
Posted: Tue Dec 18, 2012 9:03 pm
Just use some H beam rods 
Re: arden head and big journal rods
Posted: Tue Dec 18, 2012 11:25 pm
Yup, I've tried and found this as well with Saenz con rods.251 ENG wrote:Just use some H beam rods
Re: arden head and big journal rods
Posted: Wed Dec 19, 2012 6:03 am
Hi,
just some modifications.
just some modifications.
Re: arden head and big journal rods
Posted: Wed Dec 19, 2012 10:30 am
Thanks for that, i gather from the picture youve machined the spot face where the rod bolt head sits and possibly reduced the edge of the rod ? Anymore detailed info would be appreciated.
Astro wrote:Hi,
just some modifications.
Re: arden head and big journal rods
Posted: Wed Dec 19, 2012 11:33 am
Hi,
nothing more than can see and you mentioned. But you should care about the peace of the thread now looking downwards. Otherwise it will contact the gearbox housing.
Perhaps I should add. What you see is a standard crank of a 1293 engine. It’s just made for standard inlet valves. If you will use one of the new competition heads with 37mm or more inlet valves, you will need 73.5mm pistons and a short stroke crank if you need to keep the 1300ccm.
Best regards
nothing more than can see and you mentioned. But you should care about the peace of the thread now looking downwards. Otherwise it will contact the gearbox housing.
Perhaps I should add. What you see is a standard crank of a 1293 engine. It’s just made for standard inlet valves. If you will use one of the new competition heads with 37mm or more inlet valves, you will need 73.5mm pistons and a short stroke crank if you need to keep the 1300ccm.
Best regards
Re: arden head and big journal rods
Posted: Sat Dec 29, 2012 9:55 pm
hopp!
i have done this on my arden-headed engine last year.
whe machined down the seat of the bolt by 2,5 mm so it would not touch the camshaft.
the engine worked very well but failed becuse the new arden head was repaired with some araldite glue... ( no coment...)
regards fabian
i have done this on my arden-headed engine last year.
whe machined down the seat of the bolt by 2,5 mm so it would not touch the camshaft.
the engine worked very well but failed becuse the new arden head was repaired with some araldite glue... ( no coment...)
regards fabian
Re: arden head and big journal rods
Posted: Sat Dec 29, 2012 10:47 pm
2.5mm from a 1.75" journal rod? Sure you don't mean 1.625" rods?
Re: arden head and big journal rods
Posted: Sun Dec 30, 2012 1:27 am
I think he means the spot facing for the stud head was dropped a further 2.5 mm (which may also require shorter studs? )Vegard wrote:2.5mm from a 1.75" journal rod? Sure you don't mean 1.625" rods?
Re: arden head and big journal rods
Posted: Sun Dec 30, 2012 7:48 am
Yes, on the photo you saw a 1.75 big end journal and at the second con rod you have to cut the stud for the same 2.5mm. Otherwise it will contact the gearbox housing.
Re: arden head and big journal rods
Posted: Sun Dec 30, 2012 8:59 am
Ok. When I measured the same thing, it seemed to be more than that to make things go around (!) 
Re: arden head and big journal rods
Posted: Sun Dec 30, 2012 9:48 am
Maybe that it is the Swift SW 23 8-port cam installed at 0°. 
Re: arden head and big journal rods
Posted: Sun Jan 06, 2013 9:15 am
The Rods i used were innocenti rods so they were 1.75" rods i supose?
Re: arden head and big journal rods
Posted: Sun Jan 06, 2013 10:23 am
Yes, Innocenti rods are big journal. Did yo have to modify them in a similar way ? and by how much?Fanfaniracing wrote:The Rods i used were innocenti rods so they were 1.75" rods i supose?