Bedford CF-UK Message Board Logo [Home] [Search] [FAQ]
Bedford CF-UK Message Board > CF Questions > Downpipe compatibility question
[Private Message] [Register] [Profile] [Member list] [Log-in]
Who's Online:
There are 0 member(s), and 1 guest(s) online.
 
This thread has 2 pages (1 2) [Printable Version] [Post Reply]
Author Message
Anon
Deleted
Posts :
Location :
Status    : Offline

Downpipe compatibility question

Would anyone out there happen to know if this little fellow would be a suitable replacement for a 1986 Opel 2.0 petrol downpipe?

270715793458

(Sportex Opel Manta exhaust manifold down pipe 2.0 GTE)

Opel Manta 2.0 B + 2.0 GTE Sportex Gas Flowed Front Pipe designed to fit orginal mounts
Model
OPEL MANTA 2.0 B + 2.0 GTE SPORTEX EXHAUSTS GAS FLOWED FRONT PIPE
Code: dp52

----------------------

Fri 29 Jun 2012 @ 13:09 Edit this messageQuote this messagePMQuote this message
Anon
Deleted
Posts :
Location :
Status    : Offline

You'll need a section to run from the end of the front pipe across the van to the silencer.

----------------------

Fri 29 Jun 2012 @ 17:03 Edit this messageQuote this messagePMQuote this message
Anon
Deleted
Posts :
Location :
Status    : Offline

That's manageable I think. I'm more concerned about it being the right stud pattern/size for the exhaust manifold (looks to be correct) and also ensuring the layout of the pipe is compatible with everything under my van (looks to be a different shape). I'm going to get a fancy side pipe exhaust made up at Powerflow and they can do more or less anything I want as long as I've replaced my decrepit downpipe first. This one is signifiantly cheaper than a made-for-CF ABC jobbie.

I think I'll order one and see!

Thanks Phil.

----------------------

Fri 29 Jun 2012 @ 19:10 Edit this messageQuote this messagePMQuote this message
Anon
Deleted
Posts :
Location :
Status    : Offline

Had a head scratch comparing the manifold on my CF2 with the manifold off the Manta engine that eventually will replace the CF lump: Manta flange looks like it's at a different angle

----------------------

Fri 29 Jun 2012 @ 21:19 Edit this messageQuote this messagePMQuote this message
Anon
Deleted
Posts :
Location :
Status    : Offline

Just out of interest Phil, would a standard Manta B GTE manifold fit the CF2 block?

If so, presumably I could get a Manta B manifold, and the Manta-spec downpipe I posted would fit to that. The Manta manifold is presumably the same as the CF manifold because they're the same engine block?

Or am I missing something.

Manta B GTE manifold...



----------------------

Fri 29 Jun 2012 @ 22:58 Edit this messageQuote this messagePMQuote this message
Anon
Deleted
Posts :
Location :
Status    : Offline

Oh wait, damn, I just realised that 'flange' refers to the header end not the downpipe end... so the manifold wont fit the block I guess, and the downpipe wont fit the manifold... so the only option for replacing the manifold is £250 from ABC.

----------------------

Fri 29 Jun 2012 @ 23:02 Edit this messageQuote this messagePMQuote this message
Anon
Deleted
Posts :
Location :
Status    : Offline

Flange I mean is the downpipe one.

Manta engine that I've got is pretty much the same as the CF lump apart from having flat top pistons (high compression).

So far I've worked out that intake and exhaust manifolds should interchange to marry intake for Varajet with exhaust for CF.

Not got as far as figuring out whether the hot spot where they join will need extra packing or a bit skimming off one of the manifolds but the gaskets for either set-up have the same profile so it looks do-able.

----------------------

Fri 29 Jun 2012 @ 23:23 Edit this messageQuote this messagePMQuote this message
Anon
Deleted
Posts :
Location :
Status    : Offline

Woohoo!

I can buy a used, but working Manta B manifold for £15, and that sports downpipe up there for £85, and even with postage its cheaper than buying a CF manifold from ABC.

I might have a punt on it anyway and see if it works out. If it doesn't I'll just return the downpipe and sell the manifold on ebay.

So Phil, you're putting a Manta B version in your van eh? What's the advantage... high comp presumably, but owt else?

----------------------

Fri 29 Jun 2012 @ 23:35 Edit this messageQuote this messagePMQuote this message
Anon
Deleted
Posts :
Location :
Status    : Offline

Spookytim wrote:
What's the advantage... high comp presumably, but owt else?

Mainly it's to go up a bit on bhp without changing much else when the time comes to retire the original engine.

----------------------

Sat 30 Jun 2012 @ 00:23 Edit this messageQuote this messagePMQuote this message
Anon
Deleted
Posts :
Location :
Status    : Offline

I might contemplate that as well then. I'm constantly mired in the choices (or lack of) for switching up to a more powerful engine. Currently I'm thinking about a really high spec 2.0 Pinto 205 block as I think it will fit well, will provide a bit more ooomph, but not so much that it turns my gearbox into grated cheese.

I could be completely and utterly wrong on that though.

The thing I'm unsure about is whether an engine with more BHP will necessarily pull a heavy van noticeably faster. Presumably the flywheel has to remain big and heavy to pull the weight off from a standing start, and obviously the diff gearing would have to change (for me I'm thinking 205 Pinto with 2.8i Capri rear axle), so I go round and round the possibilities and never seem to come to rest on the perfect solution.

Thew closest I get to a perfect solution is when I see an XR4i RWD on ebay for £500 and I think "I'll buy that and stick the entire thing from the ignition to the rear axle under my Beddie".

When I get to that point my next thought is always "Or... I could just drive the XR4i and sell the Beddie" and off I go again on a new line of thought.

Never ends.

----------------------

Sat 30 Jun 2012 @ 12:35 Edit this messageQuote this messagePMQuote this message
bluebedouin
Global Moderator
Posts : 2444
Location : Northampton,England.
Status    : Offline

Spookytim wrote:
.... sell the Beddie" and off I go again on a new line of thought.....


Not a good idea to follow that line of thought!

----------------------

Sat 30 Jun 2012 @ 14:35 View bluebedouin   Email bluebedouin   Edit this messageQuote this messagePMQuote this message
Anon
Deleted
Posts :
Location :
Status    : Offline

Oh don't worry Blue, the thought process is cyclical and it always, without fail, comes back round to " I'd rather be driving my Beddie than an XR4i... I just need to get a more tasty lump under the bonnet... Maybe I could replace it with a...."

and off I go again.

Anyway, in other news, I have now ordered that Manta B GTE exhaust manifold. It cost me £15. I'll see how it looks when it gets here and if it seems to be the same as the one on my CF2 then I'll proceed with the Sportex downpipe.

----------------------

Sat 30 Jun 2012 @ 20:27 Edit this messageQuote this messagePMQuote this message
Anon
Deleted
Posts :
Location :
Status    : Offline

ive got a four pipe manifold IF i was to need to get a new one where would i start looking and at wot price do they start ??
guy and sharon

----------------------

Sun 01 Jul 2012 @ 10:49 Edit this messageQuote this messagePMQuote this message
Anon
Deleted
Posts :
Location :
Status    : Offline

No idea Guy but if you find out, let me know. I did wonder if any of the four branch manifolds on the Sportex site, for the Vauxhall engines, would by some random chance be compatible... but I doubt it.

Aren't there any identifying numbers or emblems on your four branch that provide clues where it came from?

----------------------

Sun 01 Jul 2012 @ 11:41 Edit this messageQuote this messagePMQuote this message
Anon
Deleted
Posts :
Location :
Status    : Offline

not that i can see all i know is that i have a billy blydernstein head ??i was thinking Adrian Bailey may have them .i got my back box [dont laugh] of him so may be !!

----------------------

Sun 01 Jul 2012 @ 18:56 Edit this messageQuote this messagePMQuote this message
Anon
Deleted
Posts :
Location :
Status    : Offline

Oh yeah, I forgot you had the Byldenstein head. Must be part and parcel of that set up then. MrB only has one manifold listed and its a new-old-stock item, cast metal, standard not four branch.

£234.00

Let me just put that again in case you think its an error...

Two Hundred, and Thirty Four Pounds.
Two Hundred and Thirty Four of them. Pounds.
Two Lots of a Hundred, plus Thirty Four Single Ones.
Thats For a Bog Standard Manifold.

----------------------

Sun 01 Jul 2012 @ 19:52 Edit this messageQuote this messagePMQuote this message
Anon
Deleted
Posts :
Location :
Status    : Offline

Spookytim wrote:
£234.00 ... Thats For a Bog Standard Manifold.

This being the one advertised since I can't remember when; maybe there's a connection..?

----------------------

Sun 01 Jul 2012 @ 20:50 Edit this messageQuote this messagePMQuote this message
Anon
Deleted
Posts :
Location :
Status    : Offline

AaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaahhhhhhhhhhhhhhhhhhhhhhhaaaaaaaaaaaaaaaaaaahhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhaaaaaaaaaaaaaaaaaAAAAAAAAAAAAAAAAAAAAAHHHHHHHHHHHHHHHHHHHHHHHHHHHHHAAAAAAAAAAAAAAAAAAAHHHHHHHHHHHHHH
HOW MUCH lol this ones going to have to last FOREVER

----------------------

Mon 02 Jul 2012 @ 10:23 Edit this messageQuote this messagePMQuote this message
Anon
Deleted
Posts :
Location :
Status    : Offline

Well, if this Manta B one I've ordered fits, everything should be fine in Bedford world with regards to manifolds. It cost me £15 and they aren't in short supply.

Fingers crossed its the same.

----------------------

Mon 02 Jul 2012 @ 22:54 Edit this messageQuote this messagePMQuote this message
Anon
Deleted
Posts :
Location :
Status    : Offline

good luck old son

----------------------

Mon 02 Jul 2012 @ 22:58 Edit this messageQuote this messagePMQuote this message
Time in GMT
[Post Reply] This thread has 2 pages (1 2)
New posts since your last visit Administrative Functions: Open/Close/Delete Thread / Move Thread
Old post

Forum Jump:

Back to the CF-UK Homepage ][ Email CF-UK

Powered by FunkBoard vCF0.74c