K10 micra,bike carbs/turbo/supercharger

[pork]

This is my old k10 which was sold to pay vet bills



this project will be made from free stuff from companies I do work for, cheap eBay stuff, and stuff I've read off the Internet....again

So the mrs is going to buy me another micra (to stop me destroying the house with DIY projects)

So far I've bought ready for when car arrives

K11 hubs to allow for better brakes
K11 antirollbars

Cbr600 carbs, which needed stripping down and cleaning





Cut some steel for plenum






Got some flanges made up



Bought myself a welder



First thing I've ever welded




Turbo arrived today too

Garrett m10 for £21.50



..........and then somehow stick it altogether





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[pork]

Also got these from last car which will probably get banded at some point



Also a pic of the mut responsible for the sale of last car



All better now


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[rodney]

bless , handsome staffy , got 2 myself ,.

[pork]

Cheers. He's a staff x olde English bully, 6 stone of stupidity!

Shame the old micra went, but had to pay bills somehow

Hopefully this one will be even more fun


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[pork]

Scrapped last plenum idea as it looked curse word and leaked like a sieve

So, plenum mk2,

3 inch pipe with 57 mm holes in



Weld on pipe



So will look something like this, is need to do other pipes

[lukeevangelou]

Mate... This is gunna be sweet, nice bit of first time welding there(:

Keep us posted!

[luckygti]

Liking the work on the carbs, how did you drill the big holes in the new plenum? Impressed with the amount you're getting done before you even have the car Puts me to shame!!

[pork]

Sept 2, 2012 8:23:09 GMT lukeevangelou said:

Mate... This is gunna be sweet, nice bit of first time welding there(:

Keep us posted!

Thanks, first attempt at the box plenum was pretty poor!!
Much prefer this one




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[pork]

Sept 2, 2012 9:43:29 GMT luckygti said:

Liking the work on the carbs, how did you drill the big holes in the new plenum? Impressed with the amount you're getting done before you even have the car Puts me to shame!!

Thanks, just used a 57 mm hole cutter attachment on a cordless drill, only mild steel so chewed thru it nicely.

Pretty much stuck now till the misses buys me the car for my birthday in octoberb

I do have have the hubs from the k11 micra sitting there, so when payday comes il buy some polo coilivers, last time I modded the shocks to fit the hubs, gunna do it the other way round this time.
Another member on here, swiftmini, done the same buy cutting off the top hole and extending it to accept the coilivers as they are, instead of slotting the holes on the shocks

The reason for the k11 hubs is so I can fit better brakes, could go as far as gtir calipers, but that a lil bit overkill

Neil


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[darrenh]

genuine question, not a critisism, but will the bike carbs work ok above atmospheric pressure, in blow thru setup ?

what are the options to raise fuel ?

[pork]

I'm basically copying what it says on that uncle bobs turbo bike page.

The idea, from what I understand, is you pressurise the float bowls and above the diagprahm rubber. On the inlet of the plenum, you place a pilot tube directly in the centre of the cold air, this will create a slightly higher pressure than the boost pressure, and this goes onto the top vent on the carbs
Fueling will be fed by a higher pressure fuel pump going to a boost referenced fpr which takes a feed from the plenum. Also this fpr will be set at 3psi higher than the boost pressure, so should adjust itself accordingly.

I think

[sowen]

Is the plenum completely hollow going straight through or do the tubes/trumpets to the carbs protrude into the plenum, I'm guessing you will be mounting a throttle body on one end of your plenum?

I'm only asking as on my turbo I've mounted trumpets inside the plenum to help equalise the airflow between my carbs and the intake is mounted centrally on top. I don't know if it is necessary but it gives me some piece of mind that I've got something in there to help prevent unequal air/fuel distribution.

[pork]

You mean like this

What set up are you using? Got any tips or pics?

Haven't decided yet how I'm gunna plumb the inlet into the plenum, was thinking of going thru the centre, maybe with some sort of diverting 'fins' to distribute the air betweent two pairs of carbs, or maybe just come from the side.
really need the car to place things out properly


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[sowen]

Yeah something like that ^

I did a little research into plenum designs and come out of it even more confused than before! Some are a plain and some have trumpets, you could try doing some rough benchflow tests to see how effective your plenum is if you're that enthusiastic, but the beauty of making your own is you can always adapt/replace it if it doesn't work or fit ;D . Best way is to try to replicate a similar factory set-up as they've done all the hard work, all you need to do is copy it so it fits

I'm running on a 2ltr lump twin SU HIF44's, with 2.5" long trumpets enclosed in a box with about 3/4" clearance between the trumpet mouth and the outer face, similar to a Rover v8 injection plenum which I know, and the inlet directed in the middle from above, with two pitot tubes for the float chambers and fuel pressure regulator upright in the centre.



Space dictated the design, but it seems to work OK, only done a few hundred miles on it at about 5psi without any drama ;D . I need to richen up the needles a lot as it progressively leans with load according to my air/fuel gauge then I can up the boost

[pork]

Looks cool there mate!

I'm really just learning as I go, taking things as far as my knowledge and abilities take me, encountering problems, then learning how to fix them.

My fabrication skills aren't quite up to scratch yet as this is the real first attempt at anything like this, so keeping all designs simple

Ultimately, my goal is to just get it to turn over and fire up without exploding...... Then sort it all out properly afterwards

What fuel pump and regulator did you go for?


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[cesarbarbosa]

Sept 2, 2012 20:54:12 GMT pork said:

Looks cool there mate!

I'm really just learning as I go, taking things as far as my knowledge and abilities take me, encountering problems, then learning how to fix them.

My fabrication skills aren't quite up to scratch yet as this is the real first attempt at anything like this, so keeping all designs simple

Ultimately, my goal is to just get it to turn over and fire up without exploding...... Then sort it all out properly afterwards

What fuel pump and regulator did you go for?


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I just saw this post and I'm almost like you, almost without skills but eager to learn about all, a bit at time I'll get there, eventually...
Keep up the good work and in doubt just ask here someone might have an answer or idea...

[darrenh]

you really need trumpet or alteast some taper into the runners, to try and maintain laminar air flow

[sowen]

Sept 2, 2012 20:54:12 GMT pork said:

Looks cool there mate!

I'm really just learning as I go, taking things as far as my knowledge and abilities take me, encountering problems, then learning how to fix them.

My fabrication skills aren't quite up to scratch yet as this is the real first attempt at anything like this, so keeping all designs simple

Ultimately, my goal is to just get it to turn over and fire up without exploding...... Then sort it all out properly afterwards

Nowt wrong with trial and error!

If you look at the pic of my plenum, the inside face by the trumpet mouth on the right is a little blackened . At the time I had just routed the air intake above the engine and cut a big hole in the bonnet for the air filter and it was the second or third test drive. I went down the road, gave it full throttle, it accelerated stupidly fast, I think the gauge went over 15psi then blew back through the front carb and I saw the puff of smoke blowing out through the hole in the bonnet . The side of the plenum got pushed right out, so now it has the two little braces to hold the sides together ;D

Sept 2, 2012 20:54:12 GMT pork said:

What fuel pump and regulator did you go for?

I've got a red top Facet pump under my fuel tank at the back feeding a Bosch high pressure inline pump at the front running through a Malpassi regulator from a Metro turbo. I also have a fuel pressure gauge that goes up and down with the boost gauge

[pork]

That's what iv been looking at

Haha, bet it's funny watching those gauges

You got a build thread? You're sounds very interesting to read about.........may steal a few ideas

[Speedle]

will be very interested to see how you get this to work, many have tried the turbo route on the k10 and never completed it.

Also you've got the problem of the gearbox being the weak link in the chain. IIRC the k11 1.0 gearbox can be fitted to the MA10/12 with little modification however you'd then need custom drive shafts.