Mikalor pipe clamps

stevepudney

GTiROC CHAIRMAN
Staff member
Who else uses these??

Do you ever have problems with them leaking or blowing off under high boost. I always found they clamp down nice and hard, which is great but they tend to pinch the silicone hose under the slider when their tightened right up, which is fine if all you use is 1 bar but anything over that then the seal between the silicone and pipe needs to be a better one.

Yesterday, using various bits in the garage along with the help of my compressor and a tire gauge I made something I could pressurise the whole induction system with.

Using this I found I could pressurise the system upto about 1 bar, anything over that then near all the clamps would leak to a degree, some only slightly but nevertheless they did definitely leak. I pissed around for ages trying to make them seal, managed to get them up 1.4 bar but after that they would still slightly leak.

In the end I worked out that on 2.5" (63mm) intercooler pipework the silicone pipework had a outside OD of just over 3" (76.2mm), so I cut some sections of 3" stainless pipe which were just over the width of a Mikalor clamp, cleaned all the rough edges and then cut a slit across it so it became a solid compressible collar that would fit around the outside of the silicone and give the Mikalor clamp something hard to clamp down onto and because it was a perfect round fit it couldn't pinch the silicone pipe.

This worked a treat, so all clamps were treated to a collar and can now take 2.5 bar without leaking.

No more leaks :thumbsup:

Thats my tip for the weekend ;-)
 
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maz

New Member
nice one! u must have great fun in ur little mad scientist garage!

is there not some sort of adhesive that can be applied between the hose and the metal? dunno if thats a daft question or not :s
 

stevepudney

GTiROC CHAIRMAN
Staff member
maz said:
nice one! u must have great fun in ur little mad scientist garage!

is there not some sort of adhesive that can be applied between the hose and the metal? dunno if thats a daft question or not :s
Tried all sorts over the years, as far as adhesives go all they do is go soft as they get hot an act as a lubricant so the pipes fly off :?
 

Dan_GTiR

New Member
Steve, when you got your Mikalor clamps, what was the actual size that you ordered??

As I need to get some of these to finish my FMIC install.


Thanks

Dan :)
 

stevepudney

GTiROC CHAIRMAN
Staff member
Dan_GTiR said:
Steve, when you got your Mikalor clamps, what was the actual size that you ordered??

As I need to get some of these to finish my FMIC install.


Thanks

Dan :)
You'll want the 79 - 85mm ones for 2.5" cooler pipe.
 

GtiR`BoD

New Member
have you tried some nice heavy jubilee`s they clamp suprisingly tight if you get the decent ones, not them flimsy ones made from tin foil that come in most kits!
 

stevepudney

GTiROC CHAIRMAN
Staff member
As requested by GtiR' BoD, my spec list, no 2.5 bar is not a Typo and I have tried all the clips out there mate. Theres nothing that I've found that grips as hard as a Mikalor Clamp, there one failure was that pinching of the silicone pipe.


Spec :

Block

Chemically cleaned & crack tested Cylinder block
Cylinder block internally smoothed (to aid oil circulation)
Line bored block to straighten main bearing journals
Cylinder block machined to match 87mm wiseco pistons
New Oil Pump
New Water Pump
New cam chain
New cam chain guides
New standard crankshaft (knife edged)
Shot Peened, polished & Cryo treated Standard Rods (bearing caps skimmed & journals re cut round)
ARP Rod Bolts
Wiseco 87mm ceramic coated Pistons
Standard Nissan Main & Big End bearings
Crank, crank pulley, rods, pistons, giken clutch & flywheel dynamically balanced
Standard Alloy sump pan internally polished (to aid oil circulation)
Forge Alloy Pulley Set

Head

Tomei 1.2mm Metal Head Gasket
New inlet & Exhaust valve guides
Ported & flowed C/head c/w matched and balanced combustion chambers
Supertech Dual Valve Springs & Ti Retainers
HKS 264 Exhaust & inlet Cams
HKS Vernier Cam Pulleys
Standard valves
Standard ported Manifold (matched to c/head exh ports)

Fuel

Modded SE Nissan cold air box c/w under bonnet air scoop
Apexi super power intake Pod filter
Modded 3" hardpipe Air inlet
Z32 MAF
Walbro 225 fuel pump
Denso 720cc Injectors
Fuel cooler (small in line cooler)

Turbo & Cooler

ARC R33 bar & plate Front mount Intercooler
63mm Stainless Intercooler pipe run
Greedy Profec B Spec 2 Boost controller
HKS SSQV Dump Valve (Dump returned to inlet)
Turbo Dynamics GT3071R c/w.86AR Turbine housing/machined out inlet on comp cover
T3 Turbo Dynamics actuator
3" Janspeed complete exhaust system

ignition

MSD 6a Ignition control box
MSD HVC Coil
Standard ECU with Emanage Ultimate
HKS Iridium S45i spark plugs
Magnacor 8.5mm Plug leads
Battery in the boot conversion (Large UK poled battery)

G/Box e.t.c.

New standard engine/gearbox mounts & stabilisers (Nismo/solid items are to harsh for road use)
OS Giken Twin Plate Clutch & Flywheel
Standard gearbox housing shot peened and cryo
treated c/w Quaife Gearset shot peened, polished & Cryo treated

Engine e.t.c.

Black Samco water hoses
All Air Con Removed
Cusco Oil Breather Kit
Mocal 24 row oil cooler c/w thremo take off plate

Chassis & body

Floorpan, chassis & sills stripped seam welded & tetra sealed c/w new re-enforced chassis rails

All suspension Bushes replaced with Whiteline polyurethane
Whiteline front antiroll bar (with new poly drop link rubbers)
Whiteline rear adjustable antiroll bar (with new poly drop link rubbers)
Whiteline Align & Lock rear subframe kit
Whiteline Anti Dive/Lift kit
K-Mac camber bolt kit
Whiteline bumpsteer kit (new motorsport rod ends)
Cusco front top strut brace
Cusco front Lower 4 point Strut brace
Cusco rear top strut brace
Polyflex Rear Tie bar bush set
Standard shocks & Hiteq 40mm lower springs
Toyo Proxie TI-S 205x40x17

Brakes & rims

Godspeed 325mm Grooved & Drilled front disks
Godspeed 285mm Grooved & Drilled Rear disks
Godspeed 4 pot front caliper kit
Lenso S7 17" Alloys (6.9kg)

Interior

Standard looking as possible
Cobra Suzuka 'S' Kevlar Drivers seat c/w custom fixed seat mounts
Repositioned steering columb to account for lower seating position
Quick release steering wheel
All plastic stripped from under carpet
 
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J

jpward

Guest
Ahh the age old pipe over pipe trick used on exhausts for years :lol:
 

stevepudney

GTiROC CHAIRMAN
Staff member
jpward said:
Ahh the age old pipe over pipe trick used on exhausts for years :lol:

I'm sure it has as it works very well but in the 25 years Ive been modding/rebuilding cars I never heard of it before.
 
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maz

New Member
how about we make this into a 'how to' ? get a picture up of the finished article with it or something. that would be great please :)
 

stevepudney

GTiROC CHAIRMAN
Staff member
Yup, I can do that, I'll sort some pictures out later.

I was actually going to start making the collars to sell if anyones interested.

Steve
 

maz

New Member
yeah please do steve, as i havnt the time or resources to muck about with pipes and stuff. but i do have the money :D could u include the clamps too?

cheers,

/maz
 

JIMMYBACK

Active Member
bloody hell steve thats a good idea....i just figured out that i had the same problem....im glad you solved it already:thumbsup:
 

Fast Guy

Moderators
Staff member
stevepudney said:
Using this I found I could pressurise the system upto about 1 bar, anything over that then near all the clamps would leak to a degree,
Steve, you should know they're trying to stop you running over 1bar and blowing the engine up:lol:
 

stevepudney

GTiROC CHAIRMAN
Staff member
Fast Guy said:
Steve, you should know they're trying to stop you running over 1bar and blowing the engine up:lol:
Why do you think I keep a spare car in bits in the shed :lol: :lol:
 

geetee

Active Member
so Mikalor good or Mikalor bad.... ?

blew the larger pipe off my DV today at only 1 bar with shitey jubilee clips that were tightened enough to leave scars in the rubber :(
 

stevepudney

GTiROC CHAIRMAN
Staff member
Mikalor clamps can be done up much tighter than a jubilee clip so they are excellent in that respect but when done up tight they can/tend to pinch the silicone hose and thus lead to a leak.

This is why I made these collars, which fit under the clamp to allow the clamp an even grip round the hose.

http://www.tidyco.co.uk/store/honda/waterpumps/pump_hose_kits.asp

This is the best price I found for Mikalors, I just called them up and ordered them over the phone, they were delivered the next day.

Steve
 
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