I have a 69 1275 Cooper S Mk1 engine MK2 head (unconfirmed bore to 1310, unconfirmed wade cam, type unknown). Picked up a 45 DCOE 13 Weber. Need to know which manifold is best and will fit without having to cut the firewall. A mate is going to the UK and could pick me up the minispares MANIFOLD INLET 45 WEBER 3.75"INCLUDING LINKAGE KIT for GBP 80- which is about $190- (if they have them back in stock) or should I get a redline? Or is something else as good / better? I need to put a kit through the weber but it is supposed to be jetted for a 1275 mini. I have read the other posts on this subject and would get a dyno test done once it is on. (How much are they?) To get the full benefit of the Weber over the current twin 1.25 SU's do I need to look at better extractors? The ones on the car aren't original Cooper S but I dont know what they are. The posts are saying LCB's with RC40 muffler. To finish it off when I get more spare $$$ I was considering a 123 ignition. Ausmini member MOLINA has been a great help with some advice after I read some of the difficulties he had putting a weber on. Any other advice / suggestions would be greatly appreciated before I buy the wrong thing. Thanks, Jim.

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Flute - 68 MK I Cooper S
Member: VMCI #2474
Member: International Mini Model Collectors Club

Best Weber manifold of the lot IMO is the Russell Engineering 5-1/2" one, it outflowed them all including the Maniflow steels. It flows about 240CFM.

here's some pics... but as you can see there's SFA room for any filter.
I wasn't prepared to hack the firewall and weld a box in, so I've now sold it and put the severely ported Redline 3005 back on.

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DrMini- 1970 wasaMatic 1360, Mk1S crank, 86.6HP (ATW) =~125 @ crank, 45 Dellorto (38 chokes), RE282 sprint cam, 1.5 rockers, 11.0:1 C/R.

Yes Doc but the induction roar would be brilliant(there has to be a trade-off somewhere...lol)

Redline do a manifold too which will allow you to fit a ramflow filter(3005 I think) but the pick is the GR one.

Hooroo

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Rob Forsyth
Miniot!!

Your answer to 'best' is the GR one....the best one that 'will fit' is the Redline 3005 - GR's one is nice - but for road use you wouldn't notice the difference and it's best not to cut up the S

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Starlet Conversion:
http://www.ausmini.com/forums/viewtopic.php?t=15484

Rob I have even more induction roar now than with the GR one, thanks to the 282 cam- the Unifilter does bugger all to shut it up. Music...

<edit> here's my redline 3005 after I ported the living daylights out of it, it flows near 200CFM now.

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DrMini- 1970 wasaMatic 1360, Mk1S crank, 86.6HP (ATW) =~125 @ crank, 45 Dellorto (38 chokes), RE282 sprint cam, 1.5 rockers, 11.0:1 C/R.

Simple rule:
If you can look through it, it`s good!

This redlne 3005 looks pretty interestinng.
It does fit without firewall modifications? Any pics with installed manifold?
Geuss, they`re not available here...

Cheers,
Jan

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No speakers, no bodykits, no six-inch spacers, no spak filler, no bullshit

What are the things you make that go inside the weber Doc? Will I need a set of them? Do you still make them?

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Flute - 68 MK I Cooper S
Member: VMCI #2474
Member: International Mini Model Collectors Club

here's some pics of the Redline with Ramflo filter, I bin the foam and use Unifilter LNX400 foam pad instead.




Flute, here's the stubstacks for Weber and Dellorto, I still have a set or 2 of 40 and 45mm.
$50/pr including postage.

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DrMini- 1970 wasaMatic 1360, Mk1S crank, 86.6HP (ATW) =~125 @ crank, 45 Dellorto (38 chokes), RE282 sprint cam, 1.5 rockers, 11.0:1 C/R.

I'll PM you Doc on Wednesday when I get home and order a set. I was also told I should put a 3.5 PSI fuel pressure valve in the fuel line because the weber doesn't need / like too much pressure. Do you use one? Thanks for the pics. I was interested to see the PCV valve is still there, I wasn't sure if it was used with the weber or not. I thought the inside of the inlet manifold was left rough to allow the fuel to mix better, I'm not sure where I read that or if it was a different part.

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Flute - 68 MK I Cooper S
Member: VMCI #2474
Member: International Mini Model Collectors Club

Fuel reg is a good idea, but I run a Dellorto with a Facet square pump and get by without one.
Those are old pics, my PCV valve is now connected to both ports with a 3/8" balance pipe. This lets me get a better idle and have both idle fuel jets set the same. I was told having it on would lose power, but with 86.6HP ATW on a road Mini, me no complain..
The inside of the GR manifold is as cast, the steps you see at the head flange end are there deliberately.
My Redline is not dead smooth after porting, it's just had a 120 grit mop put through it to smooth it. They are bloody awkward to port properly, this one has had 9 or 10 hours spent in there. So far....

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DrMini- 1970 wasaMatic 1360, Mk1S crank, 86.6HP (ATW) =~125 @ crank, 45 Dellorto (38 chokes), RE282 sprint cam, 1.5 rockers, 11.0:1 C/R.

Doc... From what i can see in the pics it looks like you don't have a softmount gasket between the carby and manifold. I was told that it's important to soft mount Webers to reduce vibrations that can stuff things up. What's your view on that?

Also, i had my Redline manifold match ported to the head. It looks much the same as yours when you look through it although the guy at HSD (Head Stud Development) left a textured finish to the inner surface. He told me that he does this to slightly disrupt the airflow and allow the fuel and air to mix better. It's quite a regular looking roughness that appears to be quite intentional. I'm wondering if it is something that i done/known by others.

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- Simon -

I had a softmount kit. When it eventually leaked fuel, I took it off. They are important with a Weber, but with Dellortos (which maybe have a better needle and seat setup) I find no problems whatever using a standard Dellorto gasket. I've found this on various other Minis too running Dellortos.

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DrMini- 1970 wasaMatic 1360, Mk1S crank, 86.6HP (ATW) =~125 @ crank, 45 Dellorto (38 chokes), RE282 sprint cam, 1.5 rockers, 11.0:1 C/R.

The difference b/w a stock Redline 3005 and a well ported one (such as in the Docs pics) are very dramatic - the stock unit barely shows daylight through it. I too have a pretty heavily ported Redline unit (courtesy of Doctor Mini ST) though not as ported as the docs unit - and the induction roar is all there.

The 3005 fits w/o modifying the firewall (just) with a ramflo filter. Getting an offset filter housing that sits a bit higher than the stock ramflo unit is a good idea and will go the longest way towards proviiding some clearance from the firewall. Still though you might have to cut the little lip around the firewall hole on the roundnose minis and milling the manifold mounting flange to add an upward angle will help too - The Doc can tell you all about it as he's got both.

Oh and the old Warnerford manifolds are pretty common and are identical to the Redline 3005.

PM sent to Dr Mini to order stub stacks. Anyone got the minispares inlet manifold to suit 45 weber?

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Flute - 68 MK I Cooper S
Member: VMCI #2474
Member: International Mini Model Collectors Club

PM replied.
If getting the Minispares manifold, make it the shortest one (3-3/4"?)unless you have a Weber box in firewall.

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DrMini- 1970 wasaMatic 1360, Mk1S crank, 86.6HP (ATW) =~125 @ crank, 45 Dellorto (38 chokes), RE282 sprint cam, 1.5 rockers, 11.0:1 C/R.