Fitting an HIF44 & Maniflow 3-1 Manifold

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jocro69
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Fitting an HIF44 & Maniflow 3-1 Manifold

Post by jocro69 »

This the underside of my 1981 Moke. I am about to fit an HIF44 carburetor and Maniflow 'freeflow' 3 branch exhaust system (LM001MO) to improve the breathing of the 1275 engine. Currently it is equipped with an HS4 and an original ('orrible) cast manifold, and feels very restricted. I know other members have fitted this upgrade, but Maniflow have said that although their system, with adapter, is suitable for Australian Mokes, they have not seen this arrangement in the past. Therefore, my questions: Is the arrangement, re the exhaust/remote change, on my car standard for Mokes built from 1979 and 1982? Was the arrangement different for Mokes made before the revisions in 1979? (if so this would account for Maniflow not being familiar with my system) and finally, can any members offer advice from experience of this upgrade? (incidentally, I will be using the original flat doughnut air-filter in its plastic case & not trying to fit 'pancake' or 'pyramid' type filters, which I believe cause a clearance problem at the bulkhead. Thanks & I look forward to your comments.
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Tim
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Re: Fitting an HIF44 & Maniflow 3-1 Manifold

Post by Tim »

Where's Dean? He's had a lot of experience fitting Maniflows to Australian Mokes. Don't copy him exactly though, unless you have private health insurance, you'll waste too much time sitting around in A & E.

Tim
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Nigel(no top)Sykes
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Re: Fitting an HIF44 & Maniflow 3-1 Manifold

Post by Nigel(no top)Sykes »

I have the system you’re looking at installing, having a (limited) look last night revealed that the standard maniflow one passes under the remote housing support. This makes it more vulnerable when off road presumably exactly what you’re trying to avoid
Come on summer
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grantourer
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Re: Fitting an HIF44 & Maniflow 3-1 Manifold

Post by grantourer »

I also have the Maniflow System. I have managed to get the clearance bend around the gearshift and not under it. Takes a bit of fiddling. Would it be worth taking your Moke to Maniflow, and asking if the can fabricate what you need?
Regards, Graham & Judith
1981 Aussie Moke
1989 Portuguese Moke
1979 Clubman Estate
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jocro69
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Re: Fitting an HIF44 & Maniflow 3-1 Manifold

Post by jocro69 »

Thanks Graham. That is what I would like, so that it is no lower than the gear change support. Does it go (looking underneath from the back toward the engine) to the left or right of the gear change?
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Wally2
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Re: Fitting an HIF44 & Maniflow 3-1 Manifold

Post by Wally2 »

Hi Richard,
Have you seen the photo's of various Maniflow exhausts on the gallery, under 'Technical', may help.
Chris
WEEMOKE
JUX180D
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grantourer
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Re: Fitting an HIF44 & Maniflow 3-1 Manifold

Post by grantourer »

jocro69 wrote: Fri Mar 01, 2019 13:11 Thanks Graham. That is what I would like, so that it is no lower than the gear change support. Does it go (looking underneath from the back toward the engine) to the left or right of the gear change?

Hi Richard. I have going it to the right of the gearchange, looking from the rear of the Moke.
Regards, Graham & Judith
1981 Aussie Moke
1989 Portuguese Moke
1979 Clubman Estate
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jocro69
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Re: Fitting an HIF44 & Maniflow 3-1 Manifold

Post by jocro69 »

Thanks Chris & everyone else who replied. Very helpful to look at all the questions regarding exhaust - I guess I should have done that first. But all the comments here and on fb have been very helpful - and have not quite put me off going ahead.
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Dean
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Re: Fitting an HIF44 & Maniflow 3-1 Manifold

Post by Dean »

I've had fitted the same Maniflow system twice to 1980 Mokes. A single box 1 &3/4" Freeflow system.
I don't know what set-up Maniflow are not familiar with Richard as they had my Moke at their workshop for a a few days some years ago for two purposes. 1: To fit a suitable system to my car and 2: to identify/manufacture/stock suitable parts for a specific vehicle, a late model, post 1979 Moke (all late Aussie, Portuguse, Cagiva) which could then be mail-ordered by others and self-fitted.
Here is my original article after Maniflow fitted the first system:

My 1980 Australian Moke recently failed the MOT on it's exhaust and if you have a Moke of this vintage you are probably thinking "How did you get round this one?".
For those with a late series Moke (All Mokes manufactured from approx late 1979) you are probably aware that the exhaust fitted is particular to this model and a standard Mini exhaust (or any exhaust designed for a Mini) will not fit. The problem occurs because of the location of the gearchange mechanism. If you have tried to fit a Mini system to one of these Mokes you will find that the pipe runs exactly where the remote gear selector box is sitting.
There have been published solutions to this in the past including cutting the transmission tunnel and moving the gear selector box to the other side of the tunnel. I wasn't keen on performing surgery on the bodyshell just to fit an exhaust so a bespoke system was the only option for me.
My previous system was a "Custom" setup but it was constructed by lots of small pieces of pipe shaped and welded together to pass round the selector box and it was a bit of a mess.
Finding a company with suitable pipe benders was a problem as they seem to be few and far between. If only I could order a system over the phone and fit it myself at home just as thousands of Mini owners do with their systems.
With this in mind, I contacted Maniflow Exhaust Systems in Salisbury for their advice. If you're familiar with Mini's you will already know Maniflow. Their systems are widely available either direct or through the network of Mini specialists. As soon as I mentioned the word "Moke" to Maniflow, the response was "Oh yeah, a Mini system won't fit those. We have to make a special!".
So, on the way home from the Moke Club Easter weekend at Swanage, I dropped the Moke off at Maniflow with instructions to build a sport system using their off the shelf parts where possible.
I collected the Moke a week later and am very impressed with the results.
They used their normal "Freeflow" exhaust manifold running into their centre exit 1&3/4" single box system. To resolve the problem with the gear selector placement, they constructed a special link pipe to bend round the selector box.
The end result is, A: I have a nice new exhaust and B: You can now order an off the shelf solution from Maniflow for your Moke.
The parts to order are:

1) Mini Cooper Freeflow exhaust manifold (LM001).
2) Mini, 1 3/4", single box, centre exit, exhaust system (LS001B). Also available as a twin box and side exit.
3) Mini Moke Freeflow adaptor link pipe (L71A).

You will also require an inlet manifold (Li58 for 1000cc) and air filter (K&N)to fit


Fast forward a few years and I found myself in Australia with a different 1980 Moke which was also needing a new exhaust. I really loved the improvement the Maniflow had given my other Moke so decided I would repeat the exercise but obviously fitting it myself this time.
I ordered the parts and , upon receipt, set about fitting them. That's when I discovered a problem (or two).
Even though they were both 1980 models, there was a small difference that impacted the exhaust. The mountings for the remote gearchange were different. My UK based car had two small mountings but the Oz based car had a longer "rail" mounting . I assume this was something to do with the planned 4WD models but it meant that the supplied link pipe would not fit this car with the rails intact. As the rails are not structural, I decided to cut away part of the O/S one to allow the pipe to fit. This is when I ended up in A&E (thank you Tim for reminding me). It was a mere flesh wound however so I was able to resume operations soon after.
I was told by Manilfow when fitting the original system, that they had to trim the manifold length by an inch or two so was not surprised to find I had to do the same (I still have the offcut if anyone needs me to measure it).
Got all the pipework installed and then hit my next problem that I still can't really explain (and neither could Maniflow apparently).
When I came to fit the carb (HS4 with cone filter) I found there was no room and it was in contact with the bulkhead. This surprised me as I assumed I had used the same parts that Maniflow had fitted to my other Moke. I emailed them for comment and was told that there was a difference in the bulkhead clearance between a 998 and 1275 and that they supply an angled spacer for a 998. Got a bit confused/pissed here as both my Mokes were 998's and they had never mentioned/offered a choice of spacer in the past and there was no way I could see what had been fitted to my previous Moke. So I then asked to buy this angled spacer but never got a reply. I then tried fitting an old MG Metro inlet instead and the carb fitted perfectly so that's what's on there now. I also decided to try the standard air filter box at this point with a K&N element.
End result was good but I didn't feel that it was as good as my previous result. I have driven it like that for some years now but recently tried improving thing by drilling a half dozen 3/4" holes on the underside of the filter box (as per Keith Calver's suggestion) and, although it's still early days, it does seem to have improved things. I have also stocked up on a few different needles to have a play with once time allows (never).

I don't know how this would perform on a 1275 though Richard. Manilfow told me back then that an LCB would be better on the bigger engines.
Dean
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jocro69
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Re: Fitting an HIF44 & Maniflow 3-1 Manifold

Post by jocro69 »

Thanks, again, Dean. I believe that they are supplying me with the adapter based upon the one created for your original Moke all those years ago, along with additional tubing. My arrangement, as you will see from the photographs, uses the two small brackets to support the cross-piece of the gear-change mechanism so that's no problem, and currently, from the regular manifold, the exhaust pipe has been modified to fit between nearside bracket and X-piece. This may be unusual, but it does maximize the protection of the system when off-tarmac.
However, from all that I have now read, I will probably have to ditch this protection and route around the off-side (like everyone else) in order to accommodate the Freeflow manifold, but hopefully we can get it high enough so that it doesn't protrude any more than the bracket.
Next week will tell. I'll post the result.
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Dean
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Re: Fitting an HIF44 & Maniflow 3-1 Manifold

Post by Dean »

Richard,
The remote box hangs a lot lower than the pipe.
I'll see if I can find some photos of my current install.
Dean
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