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Colourtune, any good?


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Running a bit rich, will a colourtune do the job? Carbs definitely need a tweek, you can smell the richness in the air. I've seen a few of you guys use them, are they as useful as people say. Thanks. 

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4 hours ago, CharlieCroker said:

Running a bit rich, will a colourtune do the job? Carbs definitely need a tweek, you can smell the richness in the air. I've seen a few of you guys use them, are they as useful as people say. Thanks. 

I've got a Colortune and Carbtune, and like them. And they've got to be simple if I can use them (with the car passing the emissions part of MOT recently, to prove it). You want to borrow them?

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Well would love to try it, wouldn't want to put you out or anything. However I've just read that richness helps start up? That's coming from the Esprit section of the forum, in a guide to tuning the dellortos. On another note anyone know the ft/lbs torque numbers for unmodified bog standard 907? Just when I went out today felt like she could pull a train she was pulling so well! Loving this engine, makes you fell like you want to do something with it. 

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140 lb·ft torque on the 907 engine, according to Wikipedia. The engine is nice, especially once it gets past around 4,000 when it really wakes up. I've thought about doing stuff to it too, but I've been down that road before with previous cars and... well, I'd have to choose between financial stability or the car! Once I've got it running right I'm gonna get it onto my friend's dyno and see what figures it can put up.

I've read that same bit I think on the forum about richness I think, so I've just tuned mine to be a little richer than they'd otherwise be.

Just ping me a message on here if you want to borrow them - they're just sat in my garage until servicing time again.

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I'm not an Esprit owner,big money. But on my cars I use a permanent fixture,a lambda and a air/fuel ratio gauge. I do have colourtune,can't fault it. But with the lambda/gauge setup,it's drive..adjust...drive...adjust,instead of spark plug out.

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30 minutes ago, blow-thru said:

I'm not an Esprit owner,big money. But on my cars I use a permanent fixture,a lambda and a air/fuel ratio gauge. I do have colourtune,can't fault it. But with the lambda/gauge setup,it's drive..adjust...drive...adjust,instead of spark plug out.

If it wouldn't look out of place and I was going down that tuning route, I'd always go for the AEM UEGO wideband. Had it as a permanent fixture in my Evos and it always did me proud.

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Dave in Yorkshire, you must move down to the South East - I would love to tune/balance my carbs. 

Shortly after buying my car 3 years ago I fitted all the parts from the carb refurbish kit and then set things up again as per a posting on the forum that suggested tightening the mixture and air screws down and then turning them anti-clockwise 2 to 3 turns - there has to be a better way, but the local garage wants £300 for a tune up!

I get a slight lag revving when pulling out at junctions so generally give it a bit more welly than needed. I'm sure that more air is needed. No problems starting or once over 3-4K revs, so probably running a bit too rich also?

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I've gone and ordered myself the Gunson Colortune 14mm set which may even arrive in time for me to play this weekend.

Thanks for the tip - having checked out the you-tube posting on how it works, I was convinced that even someone with my level of practicality could manage things. 

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