MINI2

paulbin · Apr 30th, 2006, 09:42 PM

I am going to fit a mini cooper s supercharger onto my VW lupo 1.4.

Ive been doing alot of reading up on ur site, and ive answered alot of questions, but the one thing that is getting to me is the BYPASS VALVE.

Now i see its a good idea to have one so it doesnt put strain onto the supercharger wen you close the throttle body, but as im fitting one to my 1.4 i dont have a bypass valve built in like you do on your minis.

How do you think i would go about trying to fit one? could i use a dump valve on the pipe from the intercooler going to the throttle body, to act as a bypass valve, plumb it into a vacuum pipe so that wen i lift off the throttle there is a vacuum in the inlet manifold therefore opening the dump valve - making a nice ****ST sound, and releasing any uneeded boast, will the dump valve stay open as long as there is a vacuum and close wen there isnt a vacuum (wen i press the throttle)?

jhwh · May 4th, 2006, 09:01 AM

resirc bypass is the way to go.

open will constantly sound like an air leak.

dave_cooper_s · May 4th, 2006, 09:58 PM

good luck with the project, sounds like a great plan!

paulbin · May 4th, 2006, 10:06 PM

thanks for ur comments, ive already got my supercharger from ebay, and it looks to be one with coated blades, will keep everyone posted with pictures etc

MINIMANIAUK · May 4th, 2006, 10:12 PM

I believe the lupo has a 10.4 compression ratio,so in order to s/charge it you will need new pistons,you will not be able to fudge it with gaskets,we have done a turbo conversion on a polo gti (the only one) for a customer and had to get pistons made.but it can be done.so good luck with your project

jhwh · May 4th, 2006, 10:45 PM

also a tip is to just remove metal from top of pistons to get compression down, but in the end I'd just reccomend new custom forged pistons, it's actually not allthat expensive to have them made in that small size.

rods is another thing you will probably need to change, I have no idea how the stock ones are.. but its a luop

probably not highperformance.

to be honest I'd hunt down a GT engine, the new twincharged 170HP from vw and just slap it in.

Apr 30th, 2006, 09:42 PM	#1
paulbin MINI2 Newbie Join Date: Apr 2006 Local Time: 11:48 AM Posts: 3 Offline	DIY Supercharger I am going to fit a mini cooper s supercharger onto my VW lupo 1.4. Ive been doing alot of reading up on ur site, and ive answered alot of questions, but the one thing that is getting to me is the BYPASS VALVE. Now i see its a good idea to have one so it doesnt put strain onto the supercharger wen you close the throttle body, but as im fitting one to my 1.4 i dont have a bypass valve built in like you do on your minis. How do you think i would go about trying to fit one? could i use a dump valve on the pipe from the intercooler going to the throttle body, to act as a bypass valve, plumb it into a vacuum pipe so that wen i lift off the throttle there is a vacuum in the inlet manifold therefore opening the dump valve - making a nice ****ST sound, and releasing any uneeded boast, will the dump valve stay open as long as there is a vacuum and close wen there isnt a vacuum (wen i press the throttle)?

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May 4th, 2006, 09:01 AM	#2 (permalink)
jhwh MINI2 Regular Join Date: Aug 2004 Local Time: 12:48 PM Posts: 90 Offline	resirc bypass is the way to go. open will constantly sound like an air leak.

May 4th, 2006, 09:58 PM	#3 (permalink)
dave_cooper_s Loving Mini adventures! Join Date: Jan 2006 Location: Glasgow Local Time: 12:48 PM Posts: 193 Offline	good luck with the project, sounds like a great plan!

May 4th, 2006, 10:06 PM	#4 (permalink)
paulbin MINI2 Newbie Join Date: Apr 2006 Local Time: 11:48 AM Posts: 3 Offline	thanks for ur comments, ive already got my supercharger from ebay, and it looks to be one with coated blades, will keep everyone posted with pictures etc

May 4th, 2006, 10:12 PM	#5 (permalink)
MINIMANIAUK MINI2 Sponsor Join Date: Mar 2006 Local Time: 12:48 PM Posts: 1,048 Offline	I believe the lupo has a 10.4 compression ratio,so in order to s/charge it you will need new pistons,you will not be able to fudge it with gaskets,we have done a turbo conversion on a polo gti (the only one) for a customer and had to get pistons made.but it can be done.so good luck with your project

May 4th, 2006, 10:45 PM	#6 (permalink)
jhwh MINI2 Regular Join Date: Aug 2004 Local Time: 12:48 PM Posts: 90 Offline	also a tip is to just remove metal from top of pistons to get compression down, but in the end I'd just reccomend new custom forged pistons, it's actually not allthat expensive to have them made in that small size. rods is another thing you will probably need to change, I have no idea how the stock ones are.. but its a luop probably not highperformance. to be honest I'd hunt down a GT engine, the new twincharged 170HP from vw and just slap it in.

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