4 branch manifold modification

Tips and help requests for your cars mechanics. points gaps, timming settings all those sorts of things

4 branch manifold modification

Postby jamezz666 » Mon Oct 14, 2019 5:29 pm

Hello

i have a NOS vauxhall victor 4 branch manifold and i was thinking of modifying it to fit my Viva GT.
Has anybody ever done this before? what would be the best way to go about it? any tips?

I was thinking of making a jig to mount the flanges to, so they can't move out of line but it's the length of the pipes ect i'm lost with where to start.

pictures of the manifold
Image
Image

any help is much appreciated

Thanks
James
User avatar
jamezz666
GT Viva
GT Viva
 
Posts: 312
Joined: Tue Jul 28, 2015 3:24 am
Location: worcestershire

Re: 4 branch manifold modification

Postby droopsnoot » Mon Oct 14, 2019 6:08 pm

I haven't, but it's good to see a photo of that manifold. I've got a couple of those, and have never been quite sure what they're off.
My real name: Mike. My web site: http://www.firenza.net

My stuff for sale: http://www.firenza.net/forsale.shtml
droopsnoot
Old Nail
Old Nail
 
Posts: 2323
Joined: Mon Oct 31, 2005 2:08 pm
Location: Cheshire

Re: 4 branch manifold modification

Postby jamezz666 » Mon Oct 14, 2019 6:31 pm

droopsnoot wrote:I haven't, but it's good to see a photo of that manifold. I've got a couple of those, and have never been quite sure what they're off.


that's no problem. as far as i'm aware they will fit Victor / beford CF, but it's too tight to fit the viva hb hc / firenza magnum.

Unless someone pops up with a viva one to swap for this nos exhaust, i'll be attempting to modify it in the next 3 months
User avatar
jamezz666
GT Viva
GT Viva
 
Posts: 312
Joined: Tue Jul 28, 2015 3:24 am
Location: worcestershire

Re: 4 branch manifold modification

Postby 1972nail » Mon Oct 14, 2019 10:50 pm

It will be difficult to do. The bends are not sharp enough to allow it to be cut in closer, especially the front one and the down pipes are the wrong shape, they are too straight. Good luck!
Editor of the VVOC Magazine ReVival

"When you have a Firenza like mine, who needs any Minis?" copyright David Maxwell 1979.
User avatar
1972nail
Old Nail
Old Nail
 
Posts: 3427
Joined: Sun Aug 07, 2011 4:16 pm
Location: Ballymoney Co Antrim - some say....the World's best place to live!

Re: 4 branch manifold modification

Postby 1972nail » Mon Oct 14, 2019 10:53 pm

It will be difficult to do. The bends are not sharp enough to allow it to be cut in closer, especially the front one and the down pipes are the wrong shape, they are too straight. Good luck!
Editor of the VVOC Magazine ReVival

"When you have a Firenza like mine, who needs any Minis?" copyright David Maxwell 1979.
User avatar
1972nail
Old Nail
Old Nail
 
Posts: 3427
Joined: Sun Aug 07, 2011 4:16 pm
Location: Ballymoney Co Antrim - some say....the World's best place to live!

Re: 4 branch manifold modification

Postby jamezz666 » Tue Oct 15, 2019 10:56 am

1972nail wrote:It will be difficult to do. The bends are not sharp enough to allow it to be cut in closer, especially the front one and the down pipes are the wrong shape, they are too straight. Good luck!
1966322_1433613706882556_1532112878_o.jpg
1412809_1433613710215889_1275742329_o.jpg


bloody hell thats a massive difference! i'm in two thoughts now, whether to attempt it..
I'm guessing finding a 2nd hand viva one would be near impossible to come across? or at a price that would make my bowels release :lol:
User avatar
jamezz666
GT Viva
GT Viva
 
Posts: 312
Joined: Tue Jul 28, 2015 3:24 am
Location: worcestershire

Re: 4 branch manifold modification

Postby fistfullofV5's » Tue Oct 15, 2019 5:03 pm

1972nail wrote:It will be difficult to do. The bends are not sharp enough to allow it to be cut in closer, especially the front one and the down pipes are the wrong shape, they are too straight. Good luck!
1966322_1433613706882556_1532112878_o.jpg
1412809_1433613710215889_1275742329_o.jpg

Hi David,
What diameter are your primaries on that manifold ? I've got a Janspeed type manifold fitted at the moment, but I'm thinking of fabricating a manifold in stainless tubing to the same design as you have.
Regards, Dave.
User avatar
fistfullofV5's
GT Viva
GT Viva
 
Posts: 360
Joined: Thu Dec 08, 2011 11:58 pm
Location: North Wales

Re: 4 branch manifold modification

Postby jamezz666 » Tue Oct 15, 2019 6:07 pm

fistfullofV5's wrote:
1972nail wrote:It will be difficult to do. The bends are not sharp enough to allow it to be cut in closer, especially the front one and the down pipes are the wrong shape, they are too straight. Good luck!
1966322_1433613706882556_1532112878_o.jpg
1412809_1433613710215889_1275742329_o.jpg

Hi David,
What diameter are your primaries on that manifold ? I've got a Janspeed type manifold fitted at the moment, but I'm thinking of fabricating a manifold in stainless tubing to the same design as you have.
Regards, Dave.


Fancy making two :lol:
User avatar
jamezz666
GT Viva
GT Viva
 
Posts: 312
Joined: Tue Jul 28, 2015 3:24 am
Location: worcestershire

Re: 4 branch manifold modification

Postby fistfullofV5's » Tue Oct 15, 2019 6:46 pm

jamezz666 wrote:
fistfullofV5's wrote:
1972nail wrote:It will be difficult to do. The bends are not sharp enough to allow it to be cut in closer, especially the front one and the down pipes are the wrong shape, they are too straight. Good luck!
1966322_1433613706882556_1532112878_o.jpg
1412809_1433613710215889_1275742329_o.jpg

Hi David,
What diameter are your primaries on that manifold ? I've got a Janspeed type manifold fitted at the moment, but I'm thinking of fabricating a manifold in stainless tubing to the same design as you have.
Regards, Dave.


Fancy making two :lol:

Haha, unfortunately not :lol:
My intention is to experiment with tuned lengths and get it above the gearbox crossmember on my 2litre Firenza, so it won't be a 5 min job.
Regards, Dave.
User avatar
fistfullofV5's
GT Viva
GT Viva
 
Posts: 360
Joined: Thu Dec 08, 2011 11:58 pm
Location: North Wales

Re: 4 branch manifold modification

Postby 1972nail » Tue Oct 15, 2019 6:52 pm

fistfullofV5's wrote:Hi David,
What diameter are your primaries on that manifold ?


I'll have to check but they are bigger than a standard HPF manifold. The HPF was developed from the DTV / Blydenstien fast road manifold but with smaller pipes and 45 mm final outlet. Mine is a direct copy of the DTV manifold in stainless with s 50mm final outlet.
Editor of the VVOC Magazine ReVival

"When you have a Firenza like mine, who needs any Minis?" copyright David Maxwell 1979.
User avatar
1972nail
Old Nail
Old Nail
 
Posts: 3427
Joined: Sun Aug 07, 2011 4:16 pm
Location: Ballymoney Co Antrim - some say....the World's best place to live!

Next

Return to Mechanical

Who is online

Users browsing this forum: No registered users and 0 guests