Triumph TR6 Petrol Injection (PI) Engine Tuning, balancing & idle setting

From buying to owning and improving the Triumph TR6 this series aims to give you all you need to know for living with this British classic icon.

[@MrByootox]

As a tools guy this is a clear and concise guide to balancing the throttle bodies up. very good sir 👌

[@mgmidget-thebirthofaraceca4349]

thanks. much appreciated feedback

[@mikebills9343]

Great explanation of how to set them up , cheers from Spain 🇪🇸

[@mgmidget-thebirthofaraceca4349]

Thanks. Appreciated the feedback.

[@NatsWorkshop]

Another great vid Martin 👍🏻

[@mgmidget-thebirthofaraceca4349]

Thanks 👍

[@tristanhagerty2006]

Thank goodness. I’ve just got the tr6 up and running and starting reliably but the only thing it now needs is a good tune. Just the video I needed

[@mgmidget-thebirthofaraceca4349]

Excellent. good luck with the tune up. Follow the logic and its easily possible to setup yourself

[@jabberjab]

Nicely explained, I wish we had KZbin 35 years ago!!

[@mgmidget-thebirthofaraceca4349]

Thanks. Glad you found it useful

[@joshuablunck9984]

Awesome! You deserve a TV show.

[@mgmidget-thebirthofaraceca4349]

LOL, no thanks! It would be hell I reckon. I’ll stick to you tube 👍

[@irenedoulin7721]

Thank you Mr Tr6 for all your good advice

[@mgmidget-thebirthofaraceca4349]

My pleasure!

[@chrispapadakis3575]

Thanks for this proper and simple video ......I hade gone through all these steps with my PI motor. Still running a bit faster than it should but its no problem on the open road. Maybe one of these summer days I will rebalance the intakes. Keep up the good work!

[@mgmidget-thebirthofaraceca4349]

Thanks for the feedback. glad you liked the video.

[@twistedwired]

That was thoroughly enjoying 👍🇨🇦

[@mgmidget-thebirthofaraceca4349]

Glad you enjoyed it

[@nigelarthur1281]

Great video, thanks for demystifying this for me. I will defo have a go at balancing mine to get the idle a little smoother. I will now check out your other videos

[@mgmidget-thebirthofaraceca4349]

Glad it helped

[@bobhill5227]

Thanks great video, I have this engine someone swapped into my gt6 and looking forward to tuning it ! Your car is mint 👌

[@mgmidget-thebirthofaraceca4349]

Thanks Bob. Good luck with the fit and tuning.

[@treetopspider]

This is a great series and really helpful. I have just bought a 72 TR6 which had been standing for around 40 years I'm told. After changing the fuel pump, which was completely dead I finally had fuel coming up to the engine bay. Then all of a sudden, petrol started pouring from the metering unit although I couldnt tell exactly where it was coming from. What would suspect to be the problem with the unit? There is in the boot of this car another unit which looks to be unused and my first instinct was to swap it over but looking at it, I think theres a little more to it than ripping out the old one and throwing in the new. Johnny

[@mgmidget-thebirthofaraceca4349]

Hi Johnny and thanks for watching. If youve got a PI car then check out the video on the uprated BOSCH fuel pump setup which lives in the boot. Itll explain what can go wrong and what to consider with the uprated setup and how to get a consistent 105 PSI to the metering unit.

[@kenbrown5927]

Great set of videos - very clearly explained! Just wondering if you had any additional information on the throttle linkage upgrade (10 min mark of video)?

[@mgmidget-thebirthofaraceca4349]

Thanks and thanks for watching. the upgrade is well documented on the net. in summary youve got a single bar actuator and then 3 ball joined shafts running to each throttle body so they can be adjusted individually rather than relying on each other. It is however expensive for what it is so i'm looking into what's involved in making one up on a budget utilising the existing levers . It a project for this year sometime all being well.

[@steveedwards4495]

Managed to source one just in time for cylinder 5 and 6 not firing. Checked the vacuum and barely anything from 5 and 6 throttle body. Worried about trying to adjust it if there is another reason. Spark and injectors check out and good compressions just not much vacuum there?

[@mgmidget-thebirthofaraceca4349]

yes the 3 throttle body setup and balance spring adjusters are sensitive to adjustment and it does take time and patience. the good news is you cannot damage anything by trying and learning how to get it right and the impact of each adjustment on the airflows. good luck and thanks for watching

[@dochkaian]

Great video again . . . ignition timing next?

[@mgmidget-thebirthofaraceca4349]

Thanks for the comment and glad you enjoyed the video. Always looking for new ideas for videos and what people really want to see. Ill add ignition timing to the the list. Keep an eye out :-)

[@d.b.1008]

Hello, just today I have spoken with a friend about his TR6 with this injection. Do you know if there is a Shop, who rebuilds the trottle bodys? They are all wear out and he is not able getting a homogenous mixture for all of them..thanks for helping

[@mgmidget-thebirthofaraceca4349]

If your in the UK, TR Trader can help

[@renedupert7139]

I changed all injection system (from pump, MU, injectors, admission_coming from N Ferguson) ; it seems I get serious pb on admission My idle is roughly at 1400t/mn ; I do not find any air leakage around, and the butterflies look almost nice or not ?. Do you think a very little leakage could produce such idle, which suggestion you propose to determinate the problem. You suggest to reinforce return springs, and to spray molykote D321R on butterflies and around. This product is able to resist to heat, and to fuel (and not to burn in tne engine)? several layers are necessary ? Many thanks for to share your video and your advice, Regards, René

[@mgmidget-thebirthofaraceca4349]

Rene, thanks for watching and the comments. The molykote is used by several OEM. Yes, the throttle discs at idle are pretty much closed with idle being controlled by the bypass screw, therefore any slight increase in airflow from the discs will increase idle speed. Its application is designed to reduce the gaps between disc and throttle bore to lower airflow. The TR6 has 6 large discs producing massive airflow so it helps reduce this. It should be applied when the disc is closed in the bore fully so when opened the fully closed airflow losses are eliminated. The spring changes allow each throttle body to overcome the stiction each throttle spindle will have , meaning adjustment at idle when the springs are at their weakest returning force will become easier. hope that helps and good luck with your adjustments

[@renedupert7139]

@@mgmidget-thebirthofaraceca4349 Many thanks for your explanations, helpfull for understanding; I will try as soon as I get the molykote (the only product possible, no problem with fuel and heat?), I find original springs (even new) are too weak. give you news when the test will done, Regards

[@Adam.Piper62]

Hi. I know im commenting ages after the video was posted, but im hoping you can help anyway :). We have a mk2 2.5PI that runs beautifully. However if we turn the air screw to set the idle to anything below 1100 the car will try to stall when throttle is applied so is a meance around town for example - other than that the car is perfect. Any ideas? Cheers.

[@mgmidget-thebirthofaraceca4349]

I’d be thinking fueling and timing may need adjusting with those symptoms. Maybe consider getting a rolling road session to check the setup . Thanks for watching

[@Adam.Piper62]

@@mgmidget-thebirthofaraceca4349 Thank you for replying. We have actually just spent a fair chunk of money having the fuel pump upgraded, metering unit rebuilt & set, plus distributor rebuilt and timed all by a specialist who recommended that work would solve it...however that still didn't cure our idle issue! Maybe a rolling road is the answer as you say. Cheers.

[@steveedwards4495]

Real handy balancer tool. Can I have the name of the manufacturer so I can source one please mate? I have a bike balancer tool but not sure the vacuum works in the same way or if there is a vacuum take off for the pipes.

[@mgmidget-thebirthofaraceca4349]

it came off ebay from memory but im sure ive seen similar in MOSS or Rimmer Bros. In principle they all to the same job - you dont need my exact one to get a good tune

[@Music66666]

Hi can you tell me the manufacture of your flow meter. So much easier to use and read for this job. 🤔 Did i see your TR on a classic car sale site ? Are we leaving Triumph and moving on to another classic. thanks and good hunting

[@mgmidget-thebirthofaraceca4349]

Not sure . If you type air flow meter into eBay you’ll find it. And yes you did. Decided to continue with a few more upgrades on the TR for next year though now

[@Music66666]

I am glad you decided to keep the car ☺️ Its an superb example . Did you sit and watch your own blog 10 reasons why you should BUY a TR6😂

[@trevorosborne958]

Hi, where can I get that throttle balanci g tool? Regards Trevor

[@mgmidget-thebirthofaraceca4349]

I think this one came off an auction website from memory but the big triumph or MG parts stores sell carb balancers. This one is not unique to triumph as they can be setup for any carb intake by adjusting the aperture airflow

[@johnferguson3538]

Hi. We're in the UK do you live, would be great for you to give my tr5 time and metering unit a look at. I live in Wigan. Best regards John.

[@mgmidget-thebirthofaraceca4349]

Birmingham John. You’ve got TR trader Cheshire way from memory who also specialises in PI systems. Would be worth a call

[@davidblackburn8690]

Why is the video in reverse!?

[@mgmidget-thebirthofaraceca4349]

when i used the front camera on the phone it reversed the image. found the setting now to fix this. thanks for watching

[@imnotahealthandsafetyperso4889]

Bin the manifold strength pipe the exhaust release the real sound

[@mgmidget-thebirthofaraceca4349]

Too loud I reckon. Thanks for watching