Turbo boost limitations

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Turbo boost limitations

Postby Rob P » Sat 02.11.2013, 21:10

Went out for a spin in the car today and there appears to be some issue with the Turbo, I think :?

I have a Gizzmo Intelligent Boost Controller fitted to the car and this has four boost memories which were pre set when I purchased the car, the normal setting that I have is setting 2 which usually sees the digital display running up to around 0.70 (I'm assuming that's Bar), however this evening the boost only gets to 0.13 and tops out with no further increase in boost, I tried changing the setting to see what happened with the highest setting which allows up to 1.34 and again the boost gauge only showed up to 0.13 before topping out.

Haven't managed to look under the bonnet yet as it was dark when I pulled on the drive, I've had a review of the waste gate wiggle and will look at this in the morning but would appreciate any advice on whether I'm heading in the right direction or whether there is another explanation to this

Car still pulls ok ish but certainly doesn't kick me up the backside as it does normally when giving it some welly

any pointers would be gratefully received
Thanks
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Re: Turbo boost limitations

Postby Brit-Car-Nut » Sat 02.11.2013, 21:18

Check the plumbing from the turbo to the intake. The hoses have been known to come off leaving it running naturally aspirated and the turbo unable to build pressure with wide open hoses.

It seems amazing that others that found this condition didn't hear anything unusual, so don't rule it out just because it doesn't sound different.
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Re: Turbo boost limitations

Postby Rob P » Sat 02.11.2013, 21:35

Cheers BCN, will check all hoses in the morning when there's daylight and this perpetual rain eases
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Re: Turbo boost limitations

Postby Brit-Car-Nut » Sat 02.11.2013, 21:39

And I thought it was always sunny in the UK! Don't they call it British sunshine?
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Re: Turbo boost limitations

Postby Rob P » Sat 02.11.2013, 21:42

If only that were true, any more rain in Preston and I'll be developing web feet and and a tail :lol:

a good test of the soft top that is for sure and mine failed miserably today :(
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Re: Turbo boost limitations

Postby Rob P » Sun 03.11.2013, 17:35

Checked the car this afternoon and found the pressure pipe to the Gizzmo unit was disconneted due to a split in the rubber gromet that connected it to the pipe coming from the inlet manifold, now fixed and full boost now available, in fact the car seems even more responsive than before so maybe I was already losing some pressure before it finally gave way :burnout:

Thanks to BCN for the pointer :clap:
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Re: Turbo boost limitations

Postby HJ2 » Sun 03.11.2013, 20:37

Ha, easy and cheap fix!

It happened to me too this week, but with a Saab Turbo i am selling at the moment (250 BHP 8) )
A slight 'pop' and nothing anymore. Indeed after .5 sec. of troubleshooting... The pipe blew off.

Are you sure hat your boost-gauge goes over1 bar ?!
This makes even me a little nervous and i would check this out soon.

If you are driving on stock injectors, it might damage your engine beyond repair! :poke:
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Re: Turbo boost limitations

Postby dapinky » Sun 03.11.2013, 21:13

HJ2 wrote:Are you sure hat your boost-gauge goes over1 bar ?!
This makes even me a little nervous and i would check this out soon.

If you are driving on stock injectors, it might damage your engine beyond repair! :poke:


The guage fitted on Robs car is not the OE one - we fitted it when the other upogrades were done, and t=it is designed to go over 1bar!

Injectors are bigger, turbo is bigger, exhaust is bigger, MAP is bigger - certainly drivers' smiles are very big!!!
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...oh, and a 2006 Freelander destined for the jungles of The Gambia - 4500 miles across roads, desert and tracks - what could possibly go wrong?
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Re: Turbo boost limitations

Postby HJ2 » Sun 03.11.2013, 21:39

I can imagine that! 8)
Any plans on going to Ypres Lotus day next year!? I'd like to see it in person!
Not many peeps do wild stuff on the Elan over here :mrgreen:
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Re: Turbo boost limitations

Postby Rob P » Sun 03.11.2013, 23:36

HJ2 wrote:I can imagine that! 8)
Any plans on going to Ypres Lotus day next year!? I'd like to see it in person!
Not many peeps do wild stuff on the Elan over here :mrgreen:


I would love to do the Ypres trip, I am however doing the Le Mans Classic so funds might not stretch that far but we'll see nearer the time.
Regarding the car I can't take any credit for the upgrades as they were all in place when I bought it, all I can say is it's get a lot of use and it's great fun :D
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1969 Lotus Elan S4 - Wedgewood Blue
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