Author Topic: heat shields on a tunned engine?  (Read 12813 times)

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Rusty's Uncle

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Re: heat shields on a tunned engine?
« Reply #75 on: November 09, 2011, 01:31:33 PM »
That looks nice and shiney  :D
The groove and the hole are a safety feature so that if the head gasket blows the exhaust gases go into the groove , up the hole then out through a special hollow bolt that goes through the tinware then into the head in that M10 threaded hole shown in the picture. Without that feature if the head gasket goes and you have the heater on then you will be pumping carbon monoxide into the cabin  :o
Some people have over skimmed the head and that groove has disappeared. Also if you go for a big bore kit as the diameter of the piston gets so close to the groove then that groove has to be filled. I did post a picture of the head from my 795ccs where the groove had been welded up some time ago.

alapimba

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Re: heat shields on a tunned engine?
« Reply #76 on: November 09, 2011, 02:08:07 PM »
Hum i see
But what for is the bolt if it has a hole?
Can't i just leave this whitout bolt?

thepuddlejumper

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Re: heat shields on a tunned engine?
« Reply #77 on: November 09, 2011, 07:08:08 PM »
The holes and groove are to allow gasses to exit if the head gasket blows, this keeps the cab free from the fumes.  There is a special bolt which srews into the hole.

Ralph

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alapimba

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Re: heat shields on a tunned engine?
« Reply #79 on: November 11, 2011, 10:16:46 PM »
O found that i had this bolts from a spare engine, i just didnt understand the reason for it exist

ape20ff

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Re: heat shields on a tunned engine?
« Reply #80 on: November 25, 2011, 08:26:45 PM »
Hello to everybody.
If somebody needs air/fuel guage for tuning carbs here you are:
http://74.54.120.132/dbbp/tech-tips/mm.html
That's not a problem,the web is full of projects like that.
http://www.jaycar.co.uk/productView.asp?ID=KC5195&form=CAT2&SUBCATID=965#11
http://autospeed.com.au/cms/article.html?&A=0217
http://autospeed.com/cms/title_InCar-AirFuel-Ratio-Gauge-Buyers-Guide-Part-One/A_3032/article.html
Once upon a time I saved some pictures from the hungarian site of lada.











There are 20 leded gauges with 2 integrated circuits for a more accurate reading,I have to look for them.
I can't adjust or repair a carb,of course it takes to swap jets for tuned engine.
The standard main jet for a 28 carb is 115,maybe that engine need a 120-125 one.
Standard 650 and 650E engines have diffrent jets but the main. Generally they use the same as the standard carb for light tuned engines so if you have a non 650E carb meybe the swapping of the main jet only can be enouh.
Bye.

Emin

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Re: heat shields on a tunned engine?
« Reply #81 on: November 25, 2011, 09:02:34 PM »
Thanks for that which combines my two hobbies. I guess it takes time to find the right place to put the lamba sensor. The other point is to find a working lambda sensor from junkyard for free. Saved for future.

ape20ff

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Re: heat shields on a tunned engine?
« Reply #82 on: November 30, 2011, 10:29:28 PM »
Hello.
That's the 20 led one.
http://www.siipicossu.com/seosmittari.htm
I don't think you have a muffler like this:

So you have to think of a place on the muffler.
You need a simple lambda,mind that thelife of a lambda sensor is about 60000km.
Bye.

 

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