HS6 tuning

[tomallen_2003]

Hi everyone

I have got to tune the carbs on the 2.5 but was wondering before i do is there anything that i need to know apart from what the haynes manual says.

Also i was wondering if anybody has a set of vacuum gauges they would let me borrow, a few beer tokens included of course. If not where is the best place to get them.

Cheers in advance
Tom

[djj_engineer]

Re: HS6 tuning

I used to use two plastic tubes clipped to a flat piece of wood.
They make a U tube and can be filled with almost any coloured liquid. Just make sure the carbs don't suck the fluid out of the U tube.
Derek

[b_caswell]

Re: HS6 tuning

As long as you start with both jets set equally and both throttles fully closed to set a datam you wont go far wrong.
Keep a note of adjustments so both carbs get adjusted equally. Once you have the mixture about right with a warm engine its possible to use a plastic pipe to listen to the air flow through the carbs to balance them use the same ear to listen with and put a bit of tape round one end of the pipe to prevent greasy ears.

[macdonald.dm]

Re: HS6 tuning

Further to Ben's comment, I think I remember back to my GT6 days that the 'listening tube' method is very effective - any variation in the 'suction' note is very distinctive and easy to compare between the carbs. As a bonus, your ears end up very clean.

[greyV8pete]

Re: HS6 tuning

I used the ear and piece of tube method on the HS4s on my TR3A years ago. It is really easy to hear the difference. If you go the U-tube route use Redex for the liquid. Easy to see and if it gets sucked in it just cleans the engine ;-) peter.

[tomallen_2003]

Re: HS6 tuning

Cheers for that guys, i will give it a try this week and tell you how i get on. My air filters finally come through the other day so can tune them correctly.

[cameronfurnival]

Re: HS6 tuning

I have a gauge if thats any help- its simple to use. Le t me know if you want a borrow!

[tomallen_2003]

Re: HS6 tuning

Cheers for the all the help everyone, and thankyou for the offer of the gauge i think i will give the listening a try first and see how far i get with it.