701 replies to this topic

[FartinMartin]

(with writing skills like this I should write tv movies!)

writing skills will never solve structural issues, friendliness and useful questions about what to do next might...

flying banana: I don't think you'll get a strut across between your tower bolts, as your fanimold is in the way, maybe look at some kind of re-inforcement, behind your manifold, inside the car

[Artstu]

Perhaps one of the engineers on here could come up with a solution, SukiDawg is very good with those computer programmes that make nice drawings.

[dazzler-pws]

Perhaps one of the engineers on here could come up with a solution,

Dont cut the bulkhead make a new manifold! Thats the simplest solution

I too agree with the others, that brace between the towerbolts (bulkhead part) is a critical part to the mini shell, in the past little bits have been modified but not cut all the way through, i think if you had talked your build through with others on the Engine Conversion forum (16vmini) you would have had much better advice than a bunch of kids asking silly none important questions

Banana you have taken a simple engine swap and made it complicated and cut/modded more than whats required, the beauty with the micra conversion is you can fit it in a mini subframe and make virtually no mods, Mr Big has proved this and showed us all how to do it!

Big Chief: Well done!
Banana: Epic Fail

Edited by ringonezero, 12 March 2010 - 08:38 AM.

[flying banana]

Perhaps one of the engineers on here could come up with a solution,

Dont cut the bulkhead make a new manifold! Thats the simplest solution

I too agree with the others, that brace between the towerbolts (bulkhead part) is a critical part to the mini shell, in the past little bits have been modified but not cut all the way through, i think if you had talked your build through with others on the Engine Conversion forum (16vmini) you would have had much better advice than a bunch of kids asking silly none important questions

Banana you have taken a simple engine swap and made it complicated and cut/modded more than whats required, the beauty with the micra conversion is you can fit it in a mini subframe and make virtually no mods, Mr Big has proved this and showed us all how to do it!

Big Chief: Well done!
Banana: Epic Fail

have you done this micra engine conversion if you have ?
if not how would you make a manifold then ?
the engine can only go in one place so that you line up the drive shafts so if you have to cut the car you you have to cut it
EPIC FAIL my ass >

[FartinMartin]

Perhaps one of the engineers on here could come up with a solution,

Dont cut the bulkhead make a new manifold! Thats the simplest solution

I too agree with the others, that brace between the towerbolts (bulkhead part) is a critical part to the mini shell, in the past little bits have been modified but not cut all the way through, i think if you had talked your build through with others on the Engine Conversion forum (16vmini) you would have had much better advice than a bunch of kids asking silly none important questions

Banana you have taken a simple engine swap and made it complicated and cut/modded more than whats required, the beauty with the micra conversion is you can fit it in a mini subframe and make virtually no mods, Mr Big has proved this and showed us all how to do it!

Big Chief: Well done!
Banana: Epic Fail

have you done this micra engine conversion if you have ?
if not how would you make a manifold then ?
the engine can only go in one place so that you line up the drive shafts so if you have to cut the car you you have to cut it
EPIC FAIL my ass >

ringonezero has the engine in, and made a manifold for a previous conversion

[dazzler-pws]

Actually

Yes i do have a micra engine in a mini subframe, more like Mr Bigs, and as martin says the manifold has not been done yet for the micra engine but i have made one for my last conversion so i dont expect this one to be too hard.

heres the last one i did for a 4age which is a much larger engine that i fitted in with zero mods to the bulkhead
the basic design drawing

Manifold made and fitted


You should never cut through that cross member, hopefully you will get tugged for an iva and your unsafe car will be removed from the roads

Not one to poo poo your conversion, but its in mine and other people opinion that its dangerous and you shouldn't be incuraging the other kids to try and follow your path, by showing this type of build

"as for it fits in one place, so thats it i will cut it" i must remind you that the mini was not made for the micra engine, so it will not fit, you should change the ENGINE not the car to make it work.

There are many experienced people out there, some of which who are/have offered you advice mybe your should be less "MY ASS" and pay more attention

Edited by ringonezero, 13 March 2010 - 07:09 AM.

[evansisgreat]

Hats off to you ringonezero, that manifold looks well tidy, but EPIC FAIL is a tad harsh, banana can fix it, he has the technology!
Maybe when you get the micra manifold sorted you could have a few made and sell them to other folk reading this thread, I'm sure there'd be people queuing up!
Just out of curiosity, what box did you use?

[drummerian]

i would be greatly interested in a manifold pre made! ringonezero, did you manage to fit the larger gearbox in a similar style subframe to that of bigchief? or have you taken a slightly more 'wide' approach as seen on here done a couple of member?

[R1mini]

Why has this particular thread attracted so much criticism regarding bulkhead mods when it is a common feature of, for instance the Honda vtec builds. What's the difference?
While I agree cutting chunks out of what is already a marginal structure is not a good idea, the bulkhead in the centre of the mini where it is particularly narrow is only about .5 of an inch deep and a 2*1 box section is easily as strong if not stronger

Cheers
David

[Ethel]

Your average turbo box is bigger 'n as deep. I think the chopping of the subframe is a bigger issue...

The towers aren't actually that substantial, the rubber cones actually transmit the bulk of the forces through top plate and mounting. The tower itself will be loaded in tension by the reaction to the forces compressing the cone. That's why the BMC engineers were happy to put large, unflanged holes in it. I'd say the most important bit is the cross member between the suspension arms, the bit that runs parallel to the rack with the 4 big lightening holes stamped in - it even looks like a bridge.

My interpretation is this:

The whole front end's weight is carried by the rubber cones, the subframe, engine & gearbox hang off the cones by the subframe towers. The cross member (I've been waffling on about above) takes the lateral forces, from cornering, that are transmitted from the wheels up the suspension arms. Acceleration and braking forces will be transmitted to the floor pan from the tie rods via longitudinal bits of the subby and bottom mountings, with a bit of help from the upper arms.


Looking at something like a RWD Escort is useful. there's precious little between the suspension turrets because the engine and gear box get in the way, but a separate cross member, slung under the engine, is needed to bolt the sussy arms to. You've got chassis rails to stop the floor sagging between the wheels; the bulk heads just add torsional stiffness to the shell. A fair few saloons even have diagonal bracing behind the back seat to make it obvious.

The cross member on a Mini bulkhead could be looked at as:

1. Providing localised reinforcement for the subby mounting.

2. Somewhere to mount the clutch & brake pedals (and take the reaction forces of standing on them)

3. A stiffening flange along the top of the bulkhead proper - not unlike the rim on a plastic bucket.

[FartinMartin]

In answer to a previous question, I believe this has attracted so much attention, because of the simplicity of bigchiefs conversion, it is amazing to me that somebody 'taking inspiration' from bigchiefs fantastic built has approached it in such a way that has meant so many mods. I can understand fitting the micra engine, it makes a lot of sense, cheap as chip, minimal body mods, and 5 gears. However, if you take bananamans approach and make so many body mods, wouldn't you just put something more powerful in, i.e. the 4age, as ringonezero did on his last build (which incidentally had no bulkhead mods either!), or a k-series as many others have done? anyway I think I'll leave it there and begin a build thread for my conversion on a 'real' forum where help is given and appreciated. END.

[Artstu]

I think I'll leave it there and begin a build thread for my conversion on a 'real' forum where help is given and appreciated. END.

Have you got a link to this 'real' forum?

[flying banana]

THIS IS A THREAD ABOUT FITTING A NISSAN ENGINE IN A MINI AND NOT TALKING BOLLOXS
IF YOU ARE GOING TO ATTACK BIG CHIEFS THREAD THEN TALK ABOUT BIG CHIEFS THREAD
IF YOU ARE TALKING BOLLOXS THEN START ONE AND TALK BOLLOXS I HOPE YOU HAVE MADE
COMMENTS ON ALL OTHER THREADS THAT HAVE TOUCHED THE BOX SECTION,IF YOU HAVE NOT
THEN START

[harespeed]

THIS IS A THREAD ABOUT FITTING A NISSAN ENGINE IN A MINI AND NOT TALKING BOLLOXS
IF YOU ARE GOING TO ATTACK BIG CHIEFS THREAD THEN TALK ABOUT BIG CHIEFS THREAD
IF YOU ARE TALKING BOLLOXS THEN START ONE AND TALK BOLLOXS I HOPE YOU HAVE MADE
COMMENTS ON ALL OTHER THREADS THAT HAVE TOUCHED THE BOX SECTION,IF YOU HAVE NOT
THEN START

Well Said! Such a pitty that this thread has went down this route. All the best with your conversion.
Jim.

[flying banana]

Perhaps one of the engineers on here could come up with a solution,

Dont cut the bulkhead make a new manifold! Thats the simplest solution

I too agree with the others, that brace between the towerbolts (bulkhead part) is a critical part to the mini shell, in the past little bits have been modified but not cut all the way through, i think if you had talked your build through with others on the Engine Conversion forum (16vmini) you would have had much better advice than a bunch of kids asking silly none important questions

Banana you have taken a simple engine swap and made it complicated and cut/modded more than whats required, the beauty with the micra conversion is you can fit it in a mini subframe and make virtually no mods, Mr Big has proved this and showed us all how to do it!

Big Chief: Well done!
Banana: Epic Fail

hope you dont mind me saying (big chief) but if you ringonezero look back at this thred you will see
that not only i have cut out part of the bulkhead post 101/142 so jog on and start your own thread
any way back to the build.
to all interested my wiring is being done as we speak my wire man is making up a new loom
to to use old mini/new micra and end up with one loom pictures soon i hope.