I recently got a 40DHLA Dellorto from ebay for my hot 1100 which I am working on. I checked up all the jets and the venturis and everything and they seem pretty close to what Vizard recommends for a 1098 + modified head + semi-race cam + extractors.

Vizard: 32 choke, 145 main jet, 200 air corrector, 40 pump jet, 55-98 idle, 4.5 auxiliary venturi and 5 emulsion tube.

Mine has: 32 choke, 148 main jet, 200 air corrector, 40 pump jet, 50 idle jet, 1 auxiliary venturi and 7 emulsion tube.

Is this close enough to use this setup to run the engine in? I will get it dyno tuned after that anyway.

I am also trying to work out what is the best manifold/air filter/rampipe setup considering that I don't want to cut the firewall. My car is a clubby, although I may want to use the same setup in a roundy at some point.

I read in Vizard's yellow book that the rampipes on Webers and Dellortos are very important and that "Although short manifolds aren't necessarily the best, they are often a better solution to a clearance problem than a larger manifold and ram pipe removal" (page 108)

I was thinking of an R.E. 5" manifold like on here:

http://www.minimania.com/ArticleV.cfm?DisplayID=1882

Or I remember hearing (from the Doc) that Redline (2005?) manifolds are pretty good.

On the other hand, seeing as it is only an 1100 it may not be that much of a loss if I use a swan-neck manifold as the air consumption of the engine isn't as high as 1275s.

I would like to put rampipes on the carby if possible and I would prefer to run a K & N filter over a Ramflo.

What is everyone's opinions on which way I should go, or what options I have?

Whatever you do, please don't run a swan-neck manifold

I had a weber on a mid-length manifold on my clubby, didn't foul the firewall with a Ram-Flo filter, but i guess those filters ain't the best.

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Cheap, Fast, Reliable. Choose two.

RE5.25" without firewall mods, no chance!!! I am running RE5.25" intake and have trouble fitting it with a weber box installed.

http://www.ausmini.com/forums/viewtopic.php?t=27688

and of course here: http://www.ausmini.com/forums/viewtopic.php?t=21438

No doubt that the RE intake is worth a few ponies but it is LONG. It's quite a simple thing to do Richard, the RE intake with dellorto is approximately 23cm (from memory) from the manifold to the very edge of the dellorto. Add to that say a ramflo that is approximately 2 inches makes it about 27-28cm long total. Get a tape measure and run 27cm from your manifold surface and you will realise that is almost sitting in your front passengers’ lap!

Here are your options:

1) Ly nx “gooseneck” manifold which is about 2.5 inches long, with a ramflo and stub stacks will mean no firewall mods at all. Contrary to popular belief these gooseneck intakes are actually not bad for small bores as per Graham’s Small Bore Project articles in the TME and is also published on the MiniMania website.
2) Redline/Warneford 3005 3.5 inch intake. This is the one that DrMini and I used to run. You can port it out quite well. Ramflo with stub stacks means you have to take to some of the bottom right hand side firewall hole with a hammer and bash it down slightly to clear the firewall. Otherwise it will just touch the lip around the hole in the center console part. This manifold also needs kicking up a few degrees on the mill.
3) RE5.25” intake is the bees knees but it will require a decent sized weber box to be cut and welded in the firewall. The mods to make it fit include: kicking up the intake about 2-3 degrees, measuring the entire setup before fabricating the weber box, spacing your binnacle backwards, extending your wiring loom and rerouting it, extending/changing all other dash connections to fit, right angles speedo cable adapter for round noses.

On top of this, you need to think about linkages for the sidedraft and a soft rubber mounting kit which will add a precious 2-3mm to the overall length of the intake.

Regarding jetting: take it to an engine dyno where they can measure air fuel ratio, have everything setup including air filter before going there. That’s the only way to be sure as each head/block/intake/carb setup is different and what Vizard suggests is only a starting point. What you have there is a good start only.

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Lillee - 1969 Morris Mini K

Respectfully beg to differ on the swan necks - they are not as bad as people make out. Yes they are restrictive but ported they flow ok(not as well as a warneford/redline or RE manifold...)

The bonus is there is more room to play with(air filter-wise) and the carb sits a little better on the bay(easier for me to work on...lol)

Yes I prefer the warneford/redline ones but the swan neck one works nearly as well(tried both) and just suffers from a bad rep and poor casting - other than that it is functional(albeit barely...lol).

Hooroo

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Rob Forsyth
Miniot!!

Regarding rampipes, I have done HEAPS of research and there are 3 major groups of Ram solutions:

1) Screw on Stub Stacks - I can't find any anywhere on the net around the world, but if you do tell me about it and make sure they are screw on and for 40mm. This is your best option for clearance

2) Weber ramtubes: these slip into the mouth of webers. NOT COMPATIBLE with dellortos as the venturies are different in dellortos. It can be made to fit if you machine the venturies down

3) Dellorto screw on Ramtubes: 40mm and 45mm ramtubes that have 2 screws per side. These are what you want.

On top of that you have 4 options for dellorto ramtubes:

1) Piper Cross - longish, will need firewall mods to fit with socks over them
2) K&N (Expensive) - They come in a really short version but are almost twice as dear as what I will suggest to you in point 4
3) Redline - Australian made, very good, but abit long for what you want. but CHEAP!
4) Dellorto.co.uk OEM Dellorto Ramtubes - Cheapest, shortest, and very well made. Mine are 16mm tall, cost $77 for the pair landed, took 3 working days to get here.

When installing short ramtubes, you need to be aware that the regular screws to mount the ramtubes won't fit as the tubes are so short the outer lip gets in the way. You will need to either get inventive, use some sort of allen head screw or like me use a smaller bolt and nut to hold them down.

Any ramtube will not fit inside of a ramflo filter. You will need to run socks. The only thing that will fit inside Ramflos are stub stacks...

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Lillee - 1969 Morris Mini K

I totally agree rob, they are not as bad as one would think for a small bore... I think the negative reputation that they have is based on Vizard's book and he is talking mainly about big bores...

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Lillee - 1969 Morris Mini K

Thanks for the advice guys.

It looks like my choices are:

1. Redline/Warneford manifold + Ramflo + stubstacks if I can manage to find any.

or

2. ported swan-neck + ramtubes + socks or K&N filter if these fit

I will do some measuring over the weekend and see what sort of space I have to work with and how these options work out.

You = noob.

I don't think many people would be able to tell the difference between a midlength Redline and a goosey.

True.

My 1310 S motor had one when I got it, it ran like a dog until I flung it in favour of a Redline. IMO they are a waste of time on a bigbore motor.
Yes, they may work on a smallbore, but I would port it a bit first... .

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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.

True there Kev - but you big bore guys depleat the oxygen levels every time you start a 1310/30/80 etc...us poor little small bore guys just have to fight for the spoils...lolol

Yes there is some port work to be done but they are gooders on a 850/998 for general putting about...although they are a bitch to get a linkage kit for though...cable ties come in handy...

Hooroo

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Rob Forsyth
Miniot!!

If you ever plan to go big bore later, it is more worth your while to go the redline option...

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Lillee - 1969 Morris Mini K

Just remember there are two types of goosenecks, one very pronounced (2.5") and another one which is slightly longer (4"). The four inch one is not too bad for flow, is a good compromise for not chopping into the firewall. The 2.5" is crap, the angle is too great to move the air 90* and then back 90*.

I am running a 40 dellorto with the 4 inch variety with a ramflow filter with (cringe) no ram tubes. It fits nicely. Pulls fairly well too.

I think there would be a market for stubstacks to fit dellorto if anyone wants to turn some out. I for one would certainly buy a pair. Stubstacks apparently flow quite well.

So if anyone knows where to get 40 dellorto stubstacks, or has the ability to make some, let me know, I would be keen to get hold of some.

Cheers

Chris

The 4" "gooseneck" you refer to is what we refer to as the redline 3005 mould. It is actually very good once ported out... With this and a ramflo I still have to knock a bit of my firewall down (mainly the bottom right hand lip of the round part of the firewall in front of the binnacle.

The other 2.5 inch is the real "Gooseneck".

Check this out: http://www.minimania.com/web/SCatagory/ ... ticleV.cfm

Note that the gooseneck matches the redline in the real world on a small bore (in this article it is referred to as swan neck).

Also want to draw your attention to the fact that Graham's small bore has a giant killing 95hp. So if the swan neck can work on a 95hp small bore, I don't see why it can't work perfectly well for a more sedate 50-60hp 998/1098...

Bigger is not always better. In fact if you look carefully, you won't do much better than a std twin 1 1/4 SU setup either way. BMC knew what they were on about with SUs...

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Lillee - 1969 Morris Mini K

The 2-1/2" swan neck is worse than 2x 90° bends, they are more like 80°.
The manifold is in fact Z- shaped in end on view.
And, because of this they are pretty much impossible to port out properly.

I distrust any manifold I can't see thru...

<edit> for those wondering, here's what stubstacks look like (note this manifold is a Redline 3005, not a `gooseneck')-



Chris s, PM sent.

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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 - I want some - where do you get them from...lol

Hooroo

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Rob Forsyth
Miniot!!