HIF44 vs HIF38

Post by **shoebone** » Wed Jan 07, 2009 12:12 pm

I've got a HIF38 on a 1275 a+ and think its a good compromise, good on fuel and only gets a bit wheezy at the top end ....... but by then I'm in danger of getting an instant ban, er, if you know what I mean....

Post by **Innovator** » Thu Jan 08, 2009 1:32 pm

What ever size you fit make sure you get it set up correctly on a rolling road. This will get you the correct mixture. The roling road is the most effecient way of getting it set up.

Post by **bmcecosse** » Sat Jan 10, 2009 3:37 pm

But not essential - you can do a pretty good job if you have a long hill nearby - and a plug spanner! If you do go to a rolling road - chose carefully - many have no idea about setting up SU carbs etc - and will simply run the car on the rollers, maybe tweak the ignition timing slightly - give you a nice print-out, and then empty your wallet!

Post by **Innovator** » Tue Jan 13, 2009 12:55 pm

Agreed you do need a rolling operator who knows what he is doing. Any Mini tuner should know his stuff.

It is possible to tune an engine by reading the plugs but it will be time consuming. Drive the car at full load, read the plugs, tweak, drive again, then part load etc etc

A wide band lamda sensor would speed things up , but the people who know how to do all this will not need telling how important it is to get the correct mixture after doing any mods.

I still maintain that the rolling road is the most effecient way of getting the mixture and timing set up.

Post by **bmcecosse** » Tue Jan 13, 2009 3:06 pm

I wouldn't go to 'any Mini tuner' - only go to someone who is winning races!