COMPLETED!! supercharger project. progress so far...

Post by **wibble_puppy** » Mon Sep 03, 2007 6:35 pm

bmcecosse wrote: just keep chanting the 'standard minor parts' mantra if that keeps you happy!

No need for mockery, BMCE - as you know I'm learning as fast as I can.

*chants* Go Picky, go Picky!

Post by **aussiemike** » Mon Sep 03, 2007 7:14 pm

yep keep on going picky, it is definately not th efirst time a carb has had air forced through it. You dont learn if you dont do. I was thinking of your car when i was working on mine today.
cheer, michael.

Post by **picky** » Mon Sep 03, 2007 7:59 pm

thanks for all your support, just won the fuel pressure regulator I need on ebay, now need a fuel pump. I assuming that the copper piping used on the standard minor can cope with fuel injection pressures? it looks pretty solid.

Picky

Post by **bmcecosse** » Mon Sep 03, 2007 8:03 pm

Aye - the Metro turbo is exactly this set up - blow through carb - with the throttle in the carb! I reckon the problem may be because you have removed the throttle. Either copy the Metro exactly - or much simpler - go suck through. It will work - the car will have loads of power - and you will have some fun!

Post by **picky** » Mon Sep 03, 2007 8:18 pm

I wanted to try something different.

Post by **bmcecosse** » Mon Sep 03, 2007 10:14 pm

Oh it's different all right!! And yes the fuel pipe will be fine.
Don't let me put you off - but I don't want to see you get so fed up with it that you go off and do stamp collecting instead! I've seen this often enough on the Mini forums !!
Sometimes it's better to get the thing going - and then make improvements down the line as and when time and money permit.
You've got me seriously wondering about one of these for my TR7 - oversquare 2 litre/5 main bearings/ohc/alloy head - yet only makes 105 bhp on twin carbs - how did you do the pulley to drive the scharger ??

Post by **picky** » Mon Sep 03, 2007 10:41 pm

I should be able to drive it over to uni on a weekend with the hs4 carb fitted, going to bring stuff over first in my parents car as im still not convinced its reliable enough.

you tend to make a new crank pulley for the engine on a lathe - see this pic

Obviously has to be designed exactly for your engine - I can give you the dimensions for the 6 small grooves to accept the supercharger belt. Diameter of pulley greatly influences the boost you will get. the larger v on the right is for the original fan belt to still turn the alternator and water pump. If you read my blog of the project you will find many more useful pics and info.http://www.pickmantechnologies.com/s/ I dont know how much room there is under the tr7 bonnet - so you might find you have to make 6 groove pulleys for water pump and alternator, and have a single belt go round them all. Remember that alternators can be spun backwards if need be

I highly recommend this book "Supercharged" by Corky Bell (try amazon)

and I dont need to add, dont try a crackpot half blow through half injection setup

go injection or suck through carb.

Picky

Post by **AndrewSkinner** » Tue Sep 04, 2007 12:29 am

Picky is there any chance of some more pics?? I dont know about anyone else but this is really interesting!!!

Post by **picky** » Tue Sep 04, 2007 9:47 am

yup,
three pages:

http://www.pickmantechnologies.com/s/index.htm
http://www.pickmantechnologies.com/s/page2.htm
http://www.pickmantechnologies.com/s/page3.htm

Picky

Post by **bmcecosse** » Tue Sep 04, 2007 11:07 am

Thanks Picky - nice work on the lathe - did you do yourself ? Details of the wee V grooves would be handy. I was rather hoping there might be a standard pulley that could be attached to existing pulley. Bags of room under TR7 bonnet - just looking for a nice cheap blower !! And yes - it would be suck through SU - anything else is madness (oops, sorry 'heroic')!! If I do get a blower I may be back for more info!!

Post by **picky** » Tue Sep 04, 2007 5:28 pm

I designed it myself but had it made by someone else. I will send you the v groove dimensions when I find the book - im not at home right now. The bmw mini supercharger is popular because they are cheap on ebay, technically its made by Eaton - the M45 model. I will also find the formula for determining the crank pulley diameter, depends how much boost you want but with a suck through setup you cant really go higher than 5-7psi I believe, but with a 2 litre that will be plenty! feel free to ask me for further info... reading my blog pages will be useful.

Picky

Post by **Orkney** » Tue Sep 04, 2007 6:18 pm

Pickkers Old Bean what are you going to be studying @ Uni ?

Post by **wibble_puppy** » Tue Sep 04, 2007 7:06 pm

Orkney wrote:Pickkers Old Bean what are you going to be studying @ Uni ?

brain surgery

Post by **bmcecosse** » Tue Sep 04, 2007 7:46 pm

Thanks Picky - and I will search out that book too! i think 5 psi on my TR 7 engine would blow the top off! The whole idea started because these engines when supplied in USA/Canada had stupidly low CR of 8.5/1 - and therefore much reduced efficiency - this was to run on v low octane fuel of course. Many there are now asking how to raise the CR - and instead of an engine rebuild (it's a particularly difficult engine to remove from the car - necessary for piston change) I am suggesting a simple blower installation will 'boost' (pun intended) the power quite nicely, and all done as bolt on conversion.

Post by **picky** » Wed Sep 05, 2007 11:04 am

Orkney wrote:
Pickkers Old Bean what are you going to be studying @ Uni ?

brain surgery icon_wink.gif

Im starting a general engineering course, I can later specialize so my degree wont just be "engineering" Only a few weeks to go now!

no problem bmc, can the head not be skimmed to raise CR? (just out of curiosity!)

Post by **bmcecosse** » Wed Sep 05, 2007 10:05 pm

It can - but it's alloy, and the pistons already have cut out's to clear the valves, so these would also need to be deepened, and the cam is in the head and driven by chain, so any metal off the head would beed to be compensated by the chain tensioner. Other snag is - the head is held down by a set of bolts at right angles to the head and also by a set of studs which are inserted at an angle to the head !! So again - anything more than a tiny skim means the various holes won't line up properly and would need to be 'adjusted'!!
Good luck with the engineering - that's what I did many moons ago now - but in all my career as a Professional Engineer I don't think I actually used anything they taught me at Uni - except perhaps some of the Chemistry!!

Post by **picky** » Wed Sep 05, 2007 10:14 pm

I see - so engine out and swap the pistons suddenly sounds simple! Good luck with the supercharger project if you do decide to go ahead - keep me updated as I imagine I will not have as much time to spend on the mmoc forum when I start my course...

Picky

Post by **bmcecosse** » Wed Sep 05, 2007 10:25 pm

Oh all these long idle student afternoons !!!!!!!!!

Post by **Kevin** » Thu Sep 06, 2007 3:43 pm

Picky you adjustments are progressing nicely, and the website looks great, however one small thing on your website it says
"Wolseley 1500 front brake drums. They are a straight swap for the minor ones, no mods needed"
That is true if you are using the Wolseley cylinders but most owners dont due to the cost and use moggie ones which require a slight mod, so it might be worth a mention.

Post by **picky** » Thu Sep 06, 2007 4:08 pm

Thanks Kevin, I will add a sentence or two to that effect.