changing the mixture
Turbo Mini Forums

how easy is it to alter the fueling of the HIF for boost applications?

can i just go ahead and file down the needle myself?

or is there some special art to doing it?

Edited by speedfreaq on 18th Feb, 2005.

'I swear to use the Boost, The whole Boost'
'And nothing but the Boost..... So help me God'

as always this needs to be done at a rolling road
session.

what if you have no access to a RR. Like me.

run a n/a engine,i fiddled and messed about with mine and ended up spending 2k re-building
it,now i use a rr without hesitation.

Get yourself an air/fuel meter, fit a lambda sensor into your exhaust, and hey presto you you can now profile your own needles. That's all i use and i know others do to without any problems.

Phil.

WWW.TURBO-MINI.COM

Here's a picture of a unit made by Gregor off this board. Looks a great bit of handywork.

Phil.

WWW.TURBO-MINI.COM

I second that I got a lambda and fitted it the same day it was a dodle the needle on an su isn?t rocket science.

http://www.rabdunn.co.uk/

theres a lot of scientists on line tonight.ah well we cant all be clever.

Yeah, I'm a scientist but I'm not sure about needles.

I had a load of Morris Minors and used to bugger about with my own needles. I used to use a lot of estimation in my work, run it up the hill with the ignition well advanced and then listen to where it "pinked" and with a semi educated toss of a coin and roll of dice used to whack a bit off. Really you need to get it pinking, notice the position of the piston and whack some off there. Best done on a brake. I was wondering whether I could speak to the local garage and use a combination of air/fuel meter as well as rolling brake to initially set mine up. I've decided to tow it to the nearest rolling road though! Bearing mind I have Prog Ign as well. I'm likely to break something.

Bugger off, I'm getting there.

so how do you go about filing the needle...
with a file ??? ?

i guess some good sandpaper might do th trick?

'I swear to use the Boost, The whole Boost'
'And nothing but the Boost..... So help me God'

I use wet'n-dry 600 finishing with 1200 rotating the needle in a cordless drill.

http://www.rabdunn.co.uk/